380 results on '"Hybrid membranes"'
Search Results
2. Coaxially covalent grafted strategy for core–shell structured CMP-CNTs hybrid membranes to enhance permeability and selectivity
- Author
-
Zhao, Li, Wang, Shaozhen, Yu, Jiao, Li, Zhen, Jiang, Yanli, Cui, Mengjiao, Li, Yang, Ma, Jing-xin, and Lei, Yang
- Published
- 2025
- Full Text
- View/download PDF
Catalog
3. Urease Immobilization with Affinity Based Hybrid Nanopolymeric Membranes.
- Author
-
Kuru‐Sumer, Cansu İlke, Ulucan‐Karnak, Fulden, and Akgöl, Sinan
- Subjects
- *
SYNTHETIC enzymes , *POLYMERIC membranes , *SCANNING electron microscopy , *UREASE , *INFRARED spectroscopy - Abstract
Affınity based hybrid nanopolymeric membranes were developed in this work as a support material to immobilize urease. The hybrid membrane exhibits the desired characteristics and has potential applications in biotechnological and biomedical processes, particularly in artificial kidney devices that remove urea from blood. In this study, it was aimed to embed p(GMA) (glycidylmethacrylate) nanoparticles into HEMA(2‐hydroxyethylmethacrylate) membranes and use them in urease enzyme immobilization. First, p(GMA) nanoparticles were synthesized with surfactant‐free emulsion polymerization method. Then, a hybrid affinity system was developed by embedding p(GMA) nanoparticles in the p(HEMA) polymeric membranes synthesized by the free radical photopolymerization method. Following the characterization studies with dry mass analysis, scanning electron microscopy (SEM) analysis, Fourier‐transform infrared spectroscopy (FTIR) analysis, Brunauer–Emmett–Teller (BET) analysis, surface area calculations, and swelling tests of the hybrid membranes, and conditions (pH, temperature, and concentration) were optimized for urease immobilization. Urease was immobilized onto p(GMA) nanoparticles embedded in p(HEMA) hybrid membranes via adsorption. The maximum urease immobilization capacity of the p(GMA) nanoparticles embedded in p(HEMA) hybrid membranes was 31.85 µg/g. The hybrid membrane exhibits the desired characteristics and has potential applications in biotechnological and biomedical processes, particularly in artificial kidney devices that remove urea from blood. [ABSTRACT FROM AUTHOR] more...
- Published
- 2024
- Full Text
- View/download PDF
4. Formation of Hybrid Membranes for Water Desalination by Membrane Distillation.
- Author
-
Vinogradov, I. I., Drozhzhin, N. A., Kravets, L. I., Rossouw, A., Vershinina, T. N., and Nechaev, A. N.
- Subjects
- *
MOLECULAR structure , *MEMBRANE distillation , *CONTACT angle , *DIFLUOROETHYLENE , *SUBSTRATES (Materials science) - Abstract
A method has been developed for the formation of hybrid membranes consisting of a hydrophilic microporous substrate and a hydrophobic nanofibrous polymer layer deposited by electrospinning. A track-etched poly(ethylene terephthalate) membrane has been used as the hydrophilic microporous substrate, onto the surface of which a thin layer of titanium is deposited by magnetron sputtering to provide the nanofibrous layer with adhesion. Simultaneously, this layer has been used as an electrode of a deposition collector for the electrospinning formation the nanofibrous coating. It has been shown that the application of this method for the preparation of polymer coatings using poly(vinylidene fluoride) as a starting material for the formation of nanofibers makes it possible to obtain a highly hydrophobic layer, the surface of which has an average water contact angle of 143.3 ± 1.3° depending on the deposition density. The morphological study of the nanofibrous coating has shown that its microstructure is typical of nonwoven materials. The nanofibers that form the porous system of this layer have a wide scatter of sizes. FTIR spectroscopic and X-ray diffraction investigations of the molecular structure of the nanofibrous layer have shown that the β-phase prevails in its structure, with this phase being characterized by the maximum dipole moment. It has been shown that the elaborated hybrid membranes ensure high separation selectivity of desalinating an aqueous 26.5 g/L sodium chloride solution by the membrane distillation method. In the studied regime of the membrane distillation, the salt rejection coefficient for membranes with nanofibrous layer densities of 20.7 ± 0.2–27.6 ± 0.2 g/m2 is 99.97−99.98%. It has been found that the use of a highly hydrophobic nanofibrous layer with a developed porous structure in combination with a hydrophilic microporous substrate makes it possible to increase the productivity of the membrane distillation process. The value of the maximum condensate flow through the membranes is, on average, 7.0 kg m2/h, and its value depends on the density of the deposited nanofibrous layer. [ABSTRACT FROM AUTHOR] more...
- Published
- 2024
- Full Text
- View/download PDF
5. Best of Both Worlds: Adsorptive Ultrafiltration Nanocellulose‐Hypercrosslinked Polymer Hybrid Membranes for Metal Ion Removal.
- Author
-
Mayer, Florian, Schweng, Paul, Braeuer, Simone, Hummer, Sebastian, Koellensperger, Gunda, Mautner, Andreas, Woodward, Robert, and Bismarck, Alexander
- Subjects
- *
POLYMERIC membranes , *ION exchange resins , *TRACE elements in water , *TRACE metals , *WATER hardness - Abstract
Efficient water treatment ideally combines ion exchange for the removal of hardness elements and toxic trace metals as well as ultrafiltration for the removal of particulate matter. Although promising for adsorption, many high‐surface‐area polymer materials cannot be easily processed into freestanding membranes or packed bed columns, due to poor solution processability and high back pressures, respectively. The preparation of hybrid membranes comprising sulfonated hypercrosslinked polymers entrapped in nanocellulose papers is described. The hybrid membranes are effective for simultaneous ultrafiltration and ion exchange. Increasing the polymer loading of the hybrid membrane produces synergy by increasing the permeance of the membranes while enhancing the ion adsorption capacity to values exceeding those of bulk hypercrosslinked polymers. The maximum ion adsorption capacity for copper is determined to be ≈100 mg g−1 outperforming that of pure polymer (71 mg g−1) and commercially available ion exchange resins. Competitive adsorption is tested in samples containing water hardness elements and trace toxic metal ions showing high ion‐exchange capacities. Even when fully loaded with water hardness elements, Ba2+ and Sr2+ are still removed from solution. [ABSTRACT FROM AUTHOR] more...
- Published
- 2024
- Full Text
- View/download PDF
6. Composite Track-Etched Membranes: Synthesis and Multifaced Applications.
- Author
-
Mashentseva, Anastassiya A., Sutekin, Duygu S., Rakisheva, Saniya R., and Barsbay, Murat
- Subjects
- *
SUPERCAPACITOR performance , *TISSUE scaffolds , *METAL nanoparticles , *ENVIRONMENTAL remediation , *TISSUE engineering - Abstract
Composite track-etched membranes (CTeMs) emerged as a versatile and high-performance class of materials, combining the precise pore structures of traditional track-etched membranes (TeMs) with the enhanced functionalities of integrated nanomaterials. This review provides a comprehensive overview of the synthesis, functionalization, and applications of CTeMs. By incorporating functional phases such as metal nanoparticles and conductive nanostructures, CTeMs exhibit improved performance in various domains. In environmental remediation, CTeMs effectively capture and decompose pollutants, offering both separation and detoxification. In sensor technology, they have the potential to provide high sensitivity and selectivity, essential for accurate detection in medical and environmental applications. For energy storage, CTeMs may be promising in enhancing ion transport, flexibility, and mechanical stability, addressing key issues in battery and supercapacitor performance. Biomedical applications may benefit from the versality of CTeMs, potentially supporting advanced drug delivery systems and tissue engineering scaffolds. Despite their numerous advantages, challenges remain in the fabrication and scalability of CTeMs, requiring sophisticated techniques and meticulous optimization. Future research directions include the development of cost-effective production methods and the exploration of new materials to further enhance the capabilities of CTeMs. This review underscores the transformative potential of CTeMs across various applications and highlights the need for continued innovation to fully realize their benefits. [ABSTRACT FROM AUTHOR] more...
- Published
- 2024
- Full Text
- View/download PDF
7. Fabrication of novel polyethersulfone (PES) photocatalytic membranes with excellent permeability and antifouling properties using TiO2–AgBr–Ag–SBA-15 nanofillers for cefixime removal.
- Author
-
Nayeri, Shahnaz and Parsa, Jalal Basiri
- Subjects
- *
POLYETHERSULFONE , *MEMBRANE permeability (Biology) , *POLYMERIC membranes , *SILICA nanoparticles , *HYDROPHOBIC surfaces , *X-ray diffraction - Abstract
This study aimed to enhance the permeability and antifouling properties of the polymer membrane of polyethersulfone (PES) through the modification with TiO2–AgBr–Ag–SBA-15. The hydrothermal process is used to create silica nanoparticles (SBA-15), which involved the use of tetraethylorthosilicate as a precursor and a copolymer Pluronic P123 (as a mold and the structure maintainer after solvent exiting). Then, SBA-15 nanoparticles are added to the preparation solution of TiO2–AgBr–Ag, resulting doping nanoparticles (TiO2–AgBr–Ag–SBA-15) were incorporated into the casting solution to achieve weight percentages of 0.4, 0.6, 0.8 and 1 in the final membranes. The nanoparticles were characterized using FESEM, FT-IR, XRD, XPS and EDX. Meanwhile, the membrane properties were studied using FESEM, FT-IR, CA, AFM and membrane performance tests. The hybrid membranes exhibited a less hydrophobic surface, which consequently resulted in water permeability. Moreover, the antifouling properties were notably improved, resulting in a considerable improvement in permeability without compromising the membrane's ability to remove unwanted substances. At 3.5 bar pressure, the pure water flux of the 0.8 wt% PES/TiO2–AgBr–Ag–SBA-15 membrane was two times higher than that of the pristine membrane. Flux recovery rate of 1 wt% PES/TiO2–AgBr–Ag–SBA-15 membrane can reach 90%, and the antifouling performance is excellent. [ABSTRACT FROM AUTHOR] more...
- Published
- 2024
- Full Text
- View/download PDF
8. Hybrid Cell Membrane‐Coated Nanoparticles for Biomedical Applications.
- Author
-
Yu, Yiyan, Peng, Yifei, Shen, Wei‐Ting, Zhou, Zhidong, Kai, Mingxuan, Gao, Weiwei, and Zhang, Liangfang
- Subjects
- *
NANOPARTICLES , *CELL fusion , *TARGETED drug delivery , *IMMUNOREGULATION , *TREATMENT effectiveness , *CELL membranes - Abstract
There is growing interest in developing cell membrane‐coated nanoparticles (CNPs) for unique host cell mimicry and therapeutic applications. The continuous evolution of this technology has motivated the coating of nanoparticles with hybrid membranes originating from diverse cell types. The resulting hybrid cell membrane‐coated nanoparticles (hybrid CNPs) exhibit a higher level of synergy among multifunctionalities with better multitasking capabilities than their monotypic membrane‐coated counterparts. This advancement has catalyzed the initiation of numerous research opportunities, marking the advent of a promising frontier in therapeutic applications. This review outlines emerging biomedical applications of hybrid CNPs, focusing on drug targeting, immune modulation, biological neutralization, and disease diagnosis. Within each application, the review underscores how the strategic hybridization of distinct cell membranes augments the resulting nanoparticle therapeutic efficacy. Overall, the insights presented herein consolidate our understanding of current applications and may inspire novel designs with new biomedical applications. [ABSTRACT FROM AUTHOR] more...
- Published
- 2024
- Full Text
- View/download PDF
9. Synthesis of high-performance biocompatible polymeric membranes incorporated with zirconium-based MOF for an enhanced brackish water RO desalination.
- Author
-
Koriem, Omneya A., Showman, Marwa S., El-Shazly, Ahmed H., and Elkady, Marwa
- Subjects
BRACKISH waters ,SALINE water conversion ,POLYMERIC membranes ,REVERSE osmosis ,CELLULOSE acetate ,METAL-organic frameworks - Abstract
A nanosized zirconium 1,4- dicarboxybenzene metal-organic framework (UiO-66-MOF) was synthesized and impregnated into cellulose acetate (CA) polymeric matrix to enhance the membrane characteristics for brackish water desalination. Phase inversion was used for the fabrication of CA/UiO-66 hybrid membranes (CAU-X), where X is the concentration of immobilized UiO-66 nanoparticles (UiO-66-NPs) into CA polymeric matrix. Morphological structure and functional groups were investigated through different characterization techniques to prove the successful synthesis of the prepared UiO-66-NPs, the blank CA membrane, and hybrid CAU-X membranes. For more CAU-X characteristics, porosity, contact angle, and tensile strength were measured. The obtained data demonstrated that the impregnation of zirconium-based-NPs had a positive influence on the blank CA membrane properties. Additionally, the performance of the fabricated membranes was investigated in reverse osmosis (RO) bench-scale unit. The performance results for the pristine CAU-0 membrane showed a high salt rejection (SR) of 99.8% and a permeate water flux (PWF) of 1.14 L/m
2 .h. In comparison to pristine CA membrane, CAU-X hybrid membranes have a slightly lower SR and a higher PWF. It was found that the hybrid CAU-0.02 membrane had almost a doubled PWF of 2.8 L/m2 .h with only 2% sacrificed SR of 97.6% compared with CAU-0 membrane. Moreover, a much better PWF of 3.4 L/m2 h and a sufficient SR of approximetly 92% were obtained by CAU-0.05 membrane. Thus, CAU-0.05 was selected to further test its performance under different operating parameters. Results revealed that the optimum parameters were recorded for a sodium chloride feed stock of 5000 ppm operating at 25 °C temperature and pressure up to 15 bar. [ABSTRACT FROM AUTHOR] more...- Published
- 2024
- Full Text
- View/download PDF
10. Controlling plasmonic suprastructures through self-assembly of gold nanoparticles with hybrid copolymer-lipid vesicles.
- Author
-
Cardellini, Jacopo, Balestri, Arianna, Comparini, Luca, Lonetti, Barbara, Brucale, Marco, Valle, Francesco, Berti, Debora, and Montis, Costanza
- Subjects
- *
GOLD nanoparticles , *PLASMONICS , *MEMBRANE lipids , *CHEMICAL stability , *COPOLYMERS , *METAL clusters - Abstract
[Display omitted] Hybrid lipid membranes incorporating amphiphilic copolymers have gained significant attention due to their potential applications in various fields, including drug delivery and sensing. By combining the properties of copolymers and lipid membranes, such as enhanced chemical tunability and stability, environmental responsiveness, and multidomain nature, novel membrane architectures have been proposed. In this study, we investigated the potentialities of hybrid membranes made of two distinct components: the rigid fully saturated phospholipid 1,2-dipalmitoyl- sn - glycero -3-phosphocholine (DPPC) and the soft copolymer poly(butadiene- b -ethyleneoxide) (PBD- b -PEO). The objective was to explore the interaction of citrate-coated gold nanoparticles (AuNPs) and the hybrid membrane, aiming at constructing AuNPs-hybrid vesicles suprastructures with controlled and adjustable plasmonic properties. A series of experimental techniques were employed to investigate hybrid free-standing and supported membranes. The results revealed that the incorporation of the copolymer into the lipid membrane promotes AuNPs clustering, demonstrating a distinctive aggregative phenomenon of citrate-coated AuNPs on multidomain membranes. Importantly, we show that the size and morphology of AuNPs clusters can be precisely controlled in non-homogeneous membranes, enabling the formation of hybrid suprastructures with controlled patch properties. These results highlight the potential of lipid-copolymer hybrid membranes for designing functional materials with tailored plasmonic properties, with potential applications in nanomedicine and sensing. [ABSTRACT FROM AUTHOR] more...
- Published
- 2024
- Full Text
- View/download PDF
11. A dual-functional cuprum coordination framework for high proton conduction and electrochemical dopamine detection.
- Author
-
Zhang, Mingxia, Tan, Wei, Wu, Xiaodan, Wan, Chengan, Wen, Chen, Feng, Lei, Zhang, Feng, and Qu, Fengyu
- Subjects
- *
DOPAMINE , *PROTON conductivity , *GRAPHENE oxide , *DETECTION limit , *CHITOSAN - Abstract
The present study selected 5, 5′-((6-(ethylamino)-1, 3, 5-triazine-2, 4-diyl) bis(azanediyl))diisophthalic acid (H4EATDIA) as ligand and an amino-functionalized cuprum-based MOF (EA-JUC-1000), successfully synthesized by microwave-assisted method, for proton conduction and dopamine sensing applications. In order to enhance the proton-conducting potential of EA-JUC-1000, the Brönsted acid (BA) encapsulated composites (BA@EA-JUC-1000) are dopped into chitosan (CS) to form a series of hybrid membranes (BA@EA-JUC-1000/CS). The impedance results display that the best proton conductivity of CF3SO3H@EA-JUC-1000/CS-8% reaches up to 1.23 × 10–3 S∙cm−1 at 338 K and ~ 98% RH, 2.6-fold than that of CS. Moreover, the EA-JUC-1000 is in-situ combined with reduced graphene oxide (rGO) (rGO/EA-JUC-1000), which makes EA-JUC-1000 have a wide detection range (0.1 ~ 500 μM) and a low limit of detection (50 nM), together with good anti-interference performance, reproducibility and repeatability. In addition, the electrochemical sensing method has been successfully applied to detect DA in bovine serum samples. The dual-functional MOF-based hybrid membrane and composites including proton conduction and DA sensing would provide an example of practical application for MOFs. [ABSTRACT FROM AUTHOR] more...
- Published
- 2024
- Full Text
- View/download PDF
12. Hydrogen-bonded hybrid membranes based on hydroxylated metal-organic frameworks and PIM-1 for ultrafast hydrogen separation
- Author
-
Yongchao Sun, Fangxu Fan, Lu Bai, Tianyou Li, Jianyu Guan, Fake Sun, Yijun Liu, Wu Xiao, Gaohong He, and Canghai Ma
- Subjects
Polymers of intrinsic microporosity ,Metal-organic frameworks ,Hybrid membranes ,Hydrogen separation ,Technology - Abstract
Membrane separation technology provides an alternative to traditional thermally driven separations, owing to its advantages including low cost, energy-savings and environmental friendliness. However, the current membrane technology for gas separations using polymeric materials suffers the challenge of gas permeability-selectivity trade-offs. To overcome this hurdle, high-separation performance hybrid membranes are developed herein using microporous UiO-66-(OH)2 and PIM-1. Due to the stable interfacial hydrogen bonding, the MOF loading crosses the percolation threshold in hybrid membranes, and dual-path transport mechanisms govern the gas diffusion. Accordingly, the hybrid membranes with 40 wt% MOF loading exhibit a H2 permeability up to 9167.6 Barrer, transcending the 2008 H2/CH4 and H2/N2 Robeson upper bounds. Compared to neat PIM-1 membranes with a H2 permeability of 2378.3 Barrer, the H2 permeability of hybrid membranes increases over 285%, demonstrating ultra-high gas permeability. The design approach of hybrid membranes provides a viable pathway for the manufacture of hydrogen-bonded hybrid membranes with potential applications for hydrogen separation and CO2 capture. more...
- Published
- 2023
- Full Text
- View/download PDF
13. Hybrid Materials for Tissue Repair and Replacement: Another Frontier in Biomaterial Exploitation Focusing on Cardiovascular and Urological Fields.
- Author
-
Casarin, Martina, Todesco, Martina, Fontanella, Chiara Giulia, Morlacco, Alessandro, Dal Moro, Fabrizio, and Bagno, Andrea
- Subjects
HYBRID materials ,BIOMATERIALS ,BIOCOMPATIBILITY ,TISSUE engineering ,BIOPOLYMERS ,CELL differentiation ,ERYTHROCYTE deformability - Abstract
The main purpose of tissue engineering is to fabricate and exploit engineered constructs suitable for the effective replacement of damaged tissues and organs to perfectly integrate with the host's organism without eliciting any adverse reaction. Ideally, autologous materials represent the best option, but they are often limited due to the low availability of compatible healthy tissues. So far, one therapeutic approach relies on the exploitation of synthetic materials as they exhibit good features in terms of impermeability, deformability, and flexibility, but present chronic risks of infections and inflammations. Alternatively, biological materials, including naturally derived ones and acellular tissue matrices of human or animal origin, can be used to induce cells growth and differentiation, which are needed for tissue regeneration; however, this kind of material lacks satisfactory mechanical resistance and reproducibility, affecting their clinical application. In order to overcome the above-mentioned limitations, hybrid materials, which can be obtained by coupling synthetic polymers and biological materials, have been investigated with the aim to improve biological compatibility and mechanical features. Currently, the interest in these materials is growing, but the ideal ones have not been found yet. The present review aims at exploring some applications of hybrid materials, with particular mention to urological and cardiovascular fields. In the first case, the efforts to find a construct that can guarantee impermeability, mechanical resistance, and patency is herein illustrated; in the second case, the search for impermeability, hemocompatibility and adequate compliance is disclosed. [ABSTRACT FROM AUTHOR] more...
- Published
- 2023
- Full Text
- View/download PDF
14. Sub‐2‐nm Channels within Covalent Triazine Framework Enable Fast Proton‐Selective Transport in Flow Battery Membrane.
- Author
-
Xu, Weiyi, Wang, Yixing, Wu, Yulin, Xu, Fang, Dai, Liheng, Qu, Kai, Wang, Jiaqi, Wu, Jun, Lei, Linfeng, Li, Siyao, and Xu, Zhi
- Subjects
- *
FLOW batteries , *VANADIUM redox battery , *TRIAZINES , *PROTON conductivity , *POLYETHERS , *SULFONIC acids , *KETONES - Abstract
Ion conductive membranes (ICMs) with robust sub‐2‐nm channels show high proton transport rate in flow battery, but it remains a great challenge to precisely control the ion sieving of the membranes. Herein, as a promising proton‐selective carrier, sulfonated piperazine covalent triazine framework (s‐pCTF) with the channel size of ≈1.5 nm and abundant fast proton hopping sites is introduced into sulfonated poly(ether ether ketone) (SPEEK) to fabricate advanced ICM for vanadium flow battery (VFB) application. The interior protoplasmic channels of s‐pCTF demonstrate significant Donnan exclusion effect, resulting in a high proton/vanadium ion selectivity in theory (6.22 × 105). Meanwhile, the nitrogen‐rich sub‐2‐nm channels yield fast proton highway, and exterior‐grafted sulfonic acid groups further facilitate the proton transfer. By regulating the ion sieving and proton conductivity, the optimal hybrid membrane exhibits synchronously improved battery performance with an enhanced energy efficiency (92.41% to 78.53% at 40–200 mA cm−2) and long‐term stability for 900 cycles over 400 h (EE: 87.2–85% at 120 mA cm−2), outperforming pure SPEEK and Nafion212 membranes. This study validates the applicability of organic porous CTF with sub‐2‐nm channels and desired functionality in ICMs for high‐performance VFB application. [ABSTRACT FROM AUTHOR] more...
- Published
- 2023
- Full Text
- View/download PDF
15. New insights of g-C3N4/Bi2WO6 nanocomposite surface assembled on PVDF hybrid membrane for the treatment of pirimicarb pesticides.
- Author
-
GokulaKrishnan, S.A., Arthanareeswaran, G., Prasad, Shiva V, Yan, Wei-Mon, Sangeetha, Thangavel, Sashank Raman, J., and Ponnusami, V.
- Subjects
SURFACE energy ,SOIL profiles ,CONTACT angle ,NERVOUS system ,PHOTODEGRADATION ,INSECTICIDES - Abstract
• g-C 3 N 4, Bi 2 WO 6 & g-C 3 N 4 /Bi 2 WO 6 nanocomposites are synthesized and grafted on PVDF membrane. • Surface energy has increased by 60.2% in g-C 3 N 4 /Bi 2 WO 6 nanocomposites membrane than neat membrane. • g-C 3 N 4 /Bi 2 WO 6 PVDF membrane has shown 80% photodegradation of pirimicarb at pH 5. Pirimicarb, a commercially used insecticide, contains carbamate, which affects the nervous system of insects and living organisms, thus inhibiting their growth and increasing the production of crops. However, it has an impact on the ecosystem of groundwater by permeating the soil profile. The g-C 3 N 4, Bi 2 WO 6 & g-C 3 N 4 /Bi 2 WO 6 nanocomposites were synthesized by hydrothermal method and grafted on the PVDF membranes via in-situ polymerization. The pirimicarb wastewater of different pH 5,7 & 9 was synthetically prepared, and the performance of the membrane was tested to study the reduction and photodegradation of as-prepared pirimicarb wastewater. The surface energy had increased from 88.65 to 145.1 mJ/m
2 , g-C 3 N 4 / Bi 2 WO 6 nanocomposites on the PVDF membranes. The water contact angle of the membrane ranges from 57.9° to 37.7°, indicating that the membranes have higher hydrophilic characteristics. The water permanence is in the decreasing order of M1 (PAA/PVDF)> M6 (0.5wt% g-C 3 N 4 /Bi 2 WO 6 /PAA/PVDF)> M3 (1wt% Bi 2 WO 6 /PAA/PVDF)> M7 (1wt% g-C 3 N 4 /Bi 2 WO 6 /PAA/PVDF)> M4 (0.5wt% g-C 3 N 4 /PAA/PVDF)> M2 (0.5wt% Bi 2 WO 6 /PAA/PVDF)> M5 (1wt% g-C 3 N 4 /PAA/PVDF)> Neat (PVDF). The photodegradation studies stated that upon adding nanocomposites such as g-C 3 N 4 /Bi 2 WO 6 , the membranes undergo degradation of 80% at pH 5, which is higher than the PVDF/PAA (M1) membrane. [Display omitted] [ABSTRACT FROM AUTHOR] more...- Published
- 2025
- Full Text
- View/download PDF
16. Preparation and characterization of nanocomposite membranes based on PVC/TiO2 anatase for the separation of toluene/n-heptane mixtures via pervaporation.
- Author
-
Tabbiche, A. and Aouinti, L.
- Subjects
- *
POLYVINYL chloride , *SEPARATION (Technology) , *TITANIUM dioxide , *PERVAPORATION , *NANOCOMPOSITE materials , *CONTACT angle - Abstract
Hybrid membranes based on polyvinyl chloride (PVC) containing 1–5 wt% of titanium dioxide anatase (TiO2 anatase) particles were prepared via the casting solution method. These membranes were characterized by XRD, FTIR, TGA, SEM, EDX, and contact angle measurements. The pervaporation (PV) and separation characteristics of toluene/n-heptane mixtures containing 50 wt% through these membranes were investigated at 56 °C. The membranes flux increased with increasing TiO2 anatase content, and the selectivity decreased; however, a significant improvement in PV performance was observed for membranes loaded with TiO2 anatase compared to pure PVC. The PVC membrane loaded with 2 wt% TiO2 anatase showed the highest separation factor of 6.27 with a normalized flux of 0.55 kg/m2.h where in absence of TiO2 anatase the corresponding values were 9.7 and 0.05 kg/m2.h. [ABSTRACT FROM AUTHOR] more...
- Published
- 2023
- Full Text
- View/download PDF
17. A Novel Hybrid Membrane for Urinary Conduit Substitutes Based on Small Intestinal Submucosa Coupled with Two Synthetic Polymers.
- Author
-
Casarin, Martina, Todesco, Martina, Sandrin, Deborah, Romanato, Filippo, Bagno, Andrea, Morlacco, Alessandro, and Dal Moro, Fabrizio
- Subjects
POLYMERIC membranes ,URINARY diversion ,INTESTINES ,POLYMERS ,URINARY organs ,URETHANE ,POLYCARBONATES - Abstract
Among the urinary tract's malignancies, bladder cancer is the most frequent one: it is at the tenth position of most common cancers worldwide. Currently, the gold standard therapy consists of radical cystectomy, which results in the need to create a urinary diversion using a bowel segment from the patient. Nevertheless, due to several complications associated with bowel resection and anastomosis, which significantly affect patient quality of life, it is becoming extremely important to find an alternative solution. In our recent work, we proposed the decellularized porcine small intestinal submucosa (SIS) as a candidate material for urinary conduit substitution. In the present study, we create SIS-based hybrid membranes that are obtained by coupling decellularized SIS with two commercially available polycarbonate urethanes (Chronoflex AR and Chronoflex AR-LT) to improve SIS mechanical resistance and impermeability. We evaluated the hybrid membranes by means of immunofluorescence, two-photon microscopy, FTIR analysis, and mechanical and cytocompatibility tests. The realization of hybrid membranes did not deteriorate SIS composition, but the presence of polymers ameliorates the mechanical behavior of the hybrid constructs. Moreover, the cytocompatibility tests demonstrated a significant increase in cell growth compared to decellularized SIS alone. In light of the present results, the hybrid membrane-based urinary conduit can be a suitable candidate to realize a urinary diversion in place of an autologous intestinal segment. Further efforts will be performed in order to create a cylindrical-shaped hybrid membrane and to study its hydraulic behavior. [ABSTRACT FROM AUTHOR] more...
- Published
- 2022
- Full Text
- View/download PDF
18. High-Performance Ti 3 C 2 T x -MXene/Mycelium Hybrid Membrane for Efficient Lead Remediation: Design and Mechanistic Insights.
- Author
-
Parasnis MS, Fu Y, Deng E, Butler A, Chen CT, Dias R, Lin H, Yao F, and Nalam PC
- Abstract
This study presents a hybrid microfiltration technology designed for high-performance lead (Pb(II)) remediation, especially from aqueous solutions with high Pb(II) concentrations, by utilizing two-dimensional (2D) Ti
3 C2 Tx -MXene layers deposited on dry mycelium membranes. The hybrid Ti3 C2 Tx -MXene/mycelium (MyMX) membranes were fabricated via a single-step electrochemical deposition (ECD) technique, which enabled a uniform coating of 2D Ti3 C2 Tx -MXene onto individual hyphal fibers of a prefabricated mycelium membrane. Optimized ECD parameters for high Pb(II) uptake were identified using scanning electron microscopy and energy-dispersive X-ray spectroscopy. In immersion-based (no-flow) Pb(II) remediation experiments, MyMX membranes demonstrated significantly high Pb(II) removal efficiency (>87-99%) and rapid sorption kinetics across an initial Pb(II) concentration range of 60-1500 ppm in both single-ion and co-ion solutions. The enhanced Pb(II) sorption was attributed to electrostatic interactions and surface complexation assisted by hyphal surface proteins and Ti3 C2 Tx -MXene functional groups, as confirmed by infrared and X-ray photoelectron spectroscopies. In cross-flow studies, the MyMX membranes achieved a Pb(II) sorption capacity of ∼1347 mg/g while maintaining a high permeation rate of 51,800 L m-2 bar-1 h-1 at 1500 ppm Pb(II), surpassing the performance of various polymer-based and MXene-based microporous membranes for heavy metal remediation. The biomaterial-based hybrid MyMX membrane represents a significant advancement in water treatment technology, providing a cost-effective, sustainable solution for Pb(II) remediation in contaminated water sources. more...- Published
- 2025
- Full Text
- View/download PDF
19. Integrated radiochemotherapy study of ZIF-8 coated with osteosarcoma-platelet hybrid membranes for the delivery of Dbait and Adriamycin
- Author
-
Longhai Du, Guanghao Zhu, Yanlong Xu, Binxu Han, Yu Wang, Minhui Zhu, Yingdi Meng, Huaiwen Chen, and Zuochong Yu
- Subjects
osteosarcoma ,Metal-organic framework ,radiosensitizer ,radiochemotherapy ,hybrid membranes ,Biotechnology ,TP248.13-248.65 - Abstract
Introduction: The toxic side effects of systemic high-dose chemotherapy and poor sensitivity to radiotherapy hinder the survival rate of patients with osteosarcoma (OS). Nanotechnology offers new solutions for OS treatment; however, conventional nanocarriers suffer from inadequate targeting of tumors and short in vivo circulation time.Methods: Here, we designed a novel drug delivery system, [Dbait-ADM@ZIF-8]OPM, which uses OS-platelet hybrid membranes to encapsulate nanocarriers, to enhance the targeting and circulation time of nanocarriers, thereby enabling high enrichment of the nanocarriers in OS sites.Results: In the tumor microenvironment, the pH-sensitive nanocarrier, which is the metal-organic framework ZIF-8, dissociates to release radiosensitizer Dbait and the classical chemotherapeutic agent Adriamycin for the integrated treatment of OS via radiotherapy and chemotherapy. Benefiting from the excellent targeting ability of the hybrid membrane and the outstanding drug loading capacity of the nanocarrier, [Dbait-ADM@ZIF-8]OPM showed potent anti-tumor effects in tumor-bearing mice with almost no significant biotoxicity.Conclusion: Overall, this project is a successful exploration of the combination of radiotherapy and chemotherapy of OS treatment. Our findings solve the problems of the insensitivity of OS to radiotherapy and the toxic side effects of chemotherapy. Furthermore, this study is an expansion of the research of OS nanocarriers and provides new potential treatments for OS. more...
- Published
- 2023
- Full Text
- View/download PDF
20. High flux polyaniline-coated ceramic membrane for effective separation of emulsified oil-in-water.
- Author
-
Salhi, Billel, Baig, Nadeem, Abdulazeez, Ismail, Al-Ahmed, Amir, and Aljundi, Isam H.
- Subjects
- *
MEMBRANE separation , *CERAMICS , *POLYANILINES , *SUSTAINABILITY , *MONOMERS , *ANILINE - Abstract
Oil separation from oily wastewater is critical for environmental sustainability. In the present study, we report for the first time the facile fabrication of high flux polyaniline-modified ceramic membrane to effectively separate emulsified oil. Aniline was rapidly polymerized in a single step on alumina ceramic support using different monomer concentrations. It was revealed that the alumina membrane modified with 1.0 M aniline monomer is suitable for separating oil/water emulsions with an exceptionally high permeance of 3451 L m−2.h−1 (L.M.H.) and high separating efficiency. The polyaniline-coated alumina membranes appeared superhydrophilic/superoleophobic w ith negligible fouling behavior. The modified membranes demonstrate a steady oil rejection flux after several cycles with excellent oil-rejection of 97%. The high flux, low operating pressure, and antifouling behavior revealed that these modified membranes are excellent candidates for emulsified-oil separation. [Display omitted] [ABSTRACT FROM AUTHOR] more...
- Published
- 2022
- Full Text
- View/download PDF
21. Metal ionic liquid-based hybrid membranes for ammonia separation through moderate interaction sites and cooperative transport channels.
- Author
-
Jiang, Haiyan, Yang, Bingbing, Peng, Kuilin, Liu, Zetao, Zeng, Shaojuan, Zhang, Xiangping, and Bai, Lu
- Subjects
- *
MEMBRANE separation , *HYDROGEN content of metals , *LIQUID metals , *HYDROGEN bonding , *IONIC liquids - Abstract
[Display omitted] • Novel hybrid membranes with metal ILs and sulfonated polymers were developed. • Tuning metal centers and hydrogen bonding sites of ILs modulates NH 3 permeation. • Moderate interactions and cooperative transport channels promote NH 3 separation. • Increasing feed pressure is contributed to better NH 3 separation performance. The combination ionic liquids (ILs) with membranes is a potential method for direct NH 3 separation. In particular, ILs can modulate the interactions with NH 3 and construct pathways in membranes for preferential NH 3 transport, which is expected to overcome the trade-off effect and achieve a desirable separation performance. In this work, four metal ILs (MILs) with different metal centres and hydrogen bond donating ability, including [2-Mim][Li(NTf 2) 2 ], [Eim][Li(NTf 2) 2 ], [Bmim] 2 [Co(NCS) 4 ], and [Bim] 2 [Co(NCS) 4 ], were incorporated into sulfonated block copolymers to prepare MIL-based hybrid membranes for NH 3 separation. The investigation of structure–performance relationships suggested that the interaction sites and transport channels could be tuned by the MIL type, which greatly affects the NH 3 separation performance of the membranes. The Nexar/2-Mim-Li-10 membrane exhibits NH 3 permeability of 735.6 Barrer with NH 3 /N 2 selectivity of 844.5 and NH 3 /H 2 selectivity of 154.7, which is higher than other MIL-based hybrid membranes owing to self-assembled transport channels and moderate complexation. Increasing the MIL content and feed pressure significantly improved NH 3 separation performance. [ABSTRACT FROM AUTHOR] more...
- Published
- 2024
- Full Text
- View/download PDF
22. New hybrid materials based on cardo polybenzimidazole PBI-O-PhT and modified silica with covalent silanol cross-linking.
- Author
-
Lysova, A.A., Ponomarev, I.I., and Yaroslavtsev, A.B.
- Subjects
- *
PROTON conductivity , *FUEL cell electrolytes , *FENTON'S reagent , *SILICON oxide , *HYBRID materials - Abstract
Polybenzimidazoles (PBI) doped with phosphoric acid are a promising electrolyte for medium-temperature fuel cells. However, to be effective at high temperatures in the presence of acid, the mechanical and conductive properties of the material must be stable and no critical increase in gas permeability is required. This work proposes an approach to improve the properties of PBI-O-PhT-based materials by combining two previously known methods: covalent crosslinking with silane (3-bromopropyl)trimethoxysilane (Si Br) and doping with silicon oxide (SiO 2), including grafted imidazolinpropyl groups (SiO 2 Im). The silanol cross-linked samples exhibited higher stability when tested with Fenton's reagent and retained their morphological integrity even after 360 h of testing. The study shows that covalent crosslinking improves the stability of dopant particles in the membrane matrix and prevents their leaching during acid treatment. Additionally, the incorporation of silicon oxides enhances the proton conductivity of samples with covalent cross-linking and reduces gas permeability compared to the original PBI membrane. Proton conductivity of the covalent cross-linked samples reaches 50 and 55 mS·cm−1 at oxide contents of 5 wt% SiO 2 Im and 10 wt% SiO 2 , respectively. • Hybrid membranes PBI/modified silica with silane crosslinking for HTPEFCs. • Covalent crosslinking improves the stability of dopant particles in the membrane. • Hybrid crosslinked membranes have higher proton conductivity than initial one. • Hybrid crosslinked membranes have low hydrogen permeability. [ABSTRACT FROM AUTHOR] more...
- Published
- 2024
- Full Text
- View/download PDF
23. Synthesis of Antibacterial Hybrid Hydroxyapatite/Collagen/Polysaccharide Bioactive Membranes and Their Effect on Osteoblast Culture.
- Author
-
Nogueira, Lucas Fabrício Bahia, Eufrásio Cruz, Marcos Antônio, Aguilar, Guilherme José, Tapia-Blácido, Delia Rita, da Silva Ferreira, Márcia Eliana, Maniglia, Bianca Chieregato, Bottini, Massimo, Ciancaglini, Pietro, and Ramos, Ana Paula more...
- Subjects
- *
HYDROXYAPATITE , *POLYSACCHARIDES , *COLLAGEN , *CALCIUM phosphate , *SILVER nanoparticles , *BONE growth , *PATHOGENIC microorganisms - Abstract
Inspired by the composition and confined environment provided by collagen fibrils during bone formation, this study aimed to compare two different strategies to synthesize bioactive hybrid membranes and to assess the role the organic matrix plays as physical confinement during mineral phase deposition. The hybrid membranes were prepared by (1) incorporating calcium phosphate in a biopolymeric membrane for in situ hydroxyapatite (HAp) precipitation in the interstices of the biopolymeric membrane as a confined environment (Methodology 1) or (2) adding synthetic HAp nanoparticles (SHAp) to the freshly prepared biopolymeric membrane (Methodology 2). The biopolymeric membranes were based on hydrolyzed collagen (HC) and chitosan (Cht) or κ-carrageenan (κ-carr). The hybrid membranes presented homogeneous and continuous dispersion of the mineral particles embedded in the biopolymeric membrane interstices and enhanced mechanical properties. The importance of the confined spaces in biomineralization was confirmed by controlled biomimetic HAp precipitation via Methodology 1. HAp precipitation after immersion in simulated body fluid attested that the hybrid membranes were bioactive. Hybrid membranes containing Cht were not toxic to the osteoblasts. Hybrid membranes added with silver nanoparticles (AgNPs) displayed antibacterial action against different clinically important pathogenic microorganisms. Overall, these results open simple and promising pathways to develop a new generation of bioactive hybrid membranes with controllable degradation rates and antimicrobial properties. [ABSTRACT FROM AUTHOR] more...
- Published
- 2022
- Full Text
- View/download PDF
24. Simultaneous improvement of power density and durability of sulfonated poly(ether ether ketone) membrane by embedding CeO2‐ATiO2: A comprehensive study in low humidity proton exchange membrane fuel cells.
- Author
-
Ranganathan, Hariprasad, Vinothkannan, Mohanraj, Kim, Ae Rhan, Subramanian, Vijayapradeep, Oh, Min‐Suk, and Yoo, Dong Jin
- Subjects
- *
PROTON exchange membrane fuel cells , *POLYETHERS , *CERIUM oxides , *POWER density , *KETONES , *OPEN-circuit voltage , *ATOMIC force microscopes - Abstract
Summary: Herein, we describe the incorporation of cerium oxide‐coated amine‐functionalized titania nanorods (CeO2‐ATiO2) as a bifunctional nanofiller in sulfonated poly(ether ether ketone) (SPEEK) as a cost‐effective and high‐performance proton exchange membrane (PEM) for PEM fuel cells (PEMFCs). Facile and effective functionalization of TiO2 was performed using amine‐containing organic moieties, followed by coating the ATiO2 nanorods with CeO2. A simple solution casting method was employed to incorporate CeO2‐ATiO2 into the SPEEK matrix with various weight ratio of 0.5%, 1%, 2%, 4%, or 6%. The successful incorporation of prepared nanofiller in the SPEEK membrane matrix was confirmed by structural and morphological studies such as Fourier transform infrared, X‐ray diffractometer, scanning electron microscopy, and atomic force microscope of the SPEEK/CeO2‐ATiO2 composite membranes. The presence of ATiO2 improved proton conductivity while CeO2 alleviated the chemical degradation of the membrane by scavenging free radicals. The proton conductivity of an SPEEK/CeO2‐ATiO2 (2 wt%) nanocomposite membrane at 60°C under 20% relative humidity (RH) was 17.06 mS cm−1 whereas that of a bare SPEEK membrane under the same conditions was only 4.53 mS cm−1. PEMFCs containing SPEEK/CeO2‐ATiO2 (2 wt%) nanocomposite membrane attained a maximum power density of 117 mW cm−2 at a load current density of 371 mA/cm2 at 60°C under 100% RH. In contrast, a PEMFC containing the bare SPEEK membrane delivered a power density of 91 mW cm−2 at a load current of 253 mA cm−2. A single cell open circuit voltage (OCV) test to examine the durability of membranes revealed that a PEMFC with an SPEEK/CeO2‐ATiO2 (2 wt%) membrane showed excellent stability with an OCV decay of 0.925 mV h−1 at 60°C under 30% RH, whereas that of a PEMFC with a bare SPEEK membrane was 3.437 mV h−1 under identical conditions. Based on the abovementioned results, it is found that the SPEEK/CeO2‐ATiO2 nanocomposite membranes overcome the durability issues of pristine SPEEK membranes and show enhanced electrochemical performance under a harsh PEMFC environment. Highlights: CeO2‐ATiO2 was utilized as a bifunctional filler to fabricate composite membrane.Integration of CeO2‐ATiO2 improved the proton conductivity of sulfonated poly(ether ether ketone) (SPEEK) under low relative humidity.Addition of CeO2‐ATiO2 to SPEEK resulted in improved physiochemical and thermomechanical properties.Optimized SPEEK/CeO2‐ATiO2 (2 wt%) exhibited improved proton exchange membrane fuel cell performance while retaining excellent durability compared to pristine SPEEK. [ABSTRACT FROM AUTHOR] more...
- Published
- 2022
- Full Text
- View/download PDF
25. Evaluation of Thermal Degradation Kinetics of Hybrid Cellulose Acetate Membranes using Isoconversional Methods
- Author
-
Gesiane Mendonça Ferreira, Daniella da Silva Herdi, Kelly Cristine Da Silveira, M. Clara Gonçalves, and Mônica Calixto Andrade
- Subjects
Degradation Kinetics ,Cellulose Acetate Membranes ,Hybrid Membranes ,Isoconversional Methods ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Mathematics ,QA1-939 - Abstract
Cellulose acetate membranes are widely used in industry, emphasizing water purification processes, such as desalination. With some limiting mechanical properties, the synthesis of hybrid membranes appears as an alternative for developing high-performance materials. For its application, knowledge of thermal stability is crucial. In this work, the thermal degradation kinetics of AC-SiO2-(CH2)3NH2 hybrid cellulose acetate membranes are evaluated from thermogravimetric analysis, at three heating rates, 5, 10, and 20°C/min. The isoconversional methods proposed by Kissinger, Flynn-Wall-Ozawa, and Friedman were used for the present study of degradation kinetics. It was observed that insertion of silicon to polymeric structure promoted thermal stability to the membrane, presenting higher activation energy than pure cellulose acetate membrane, increasing from 240.28 to 1039.01 KJ/mol, using the method of Friedman. In contrast, the increase in nitrogen concentration decreases its thermal stability compared to the cellulose acetate membrane with incorporated silicon, reducing the activation energy from 1039.01 to 250.50 KJ/mol. However, it is more stable than the pure cellulose acetate membrane. The evaluation carried out in this study explained the influence of the minimum variation in the chemical composition against the thermal stability of hybrid membranes, being a factor of great importance for its application. more...
- Published
- 2022
- Full Text
- View/download PDF
26. Improvement of Li/Mg monovalent ion selectivity of cation-exchange membranes by incorporation of cerium or zirconium phosphate particles.
- Author
-
Manin, Andrey D., Golubenko, Daniel V., Yurova, Polina A., and Yaroslavtsev, Andrey B.
- Subjects
- *
ZIRCONIUM phosphate , *CERIUM , *CERIUM oxides , *MAGNESIUM sulfate , *ION-permeable membranes , *ELECTRODIALYSIS , *ZIRCONIUM boride - Abstract
[Display omitted] To improve the selectivity of cation-exchange membranes to the transfer of lithium with respect to magnesium during the electrodialysis desalination of lithium and magnesium sulfates solutions, the surface of a commercial cation-exchange membrane based on sulfated polystyrene was modified with cerium(III, IV) and zirconium phosphates. Upon incorporation of phosphate particles, the Li/Mg selectivity coefficients of the membranes increased up to 113%. [ABSTRACT FROM AUTHOR] more...
- Published
- 2023
- Full Text
- View/download PDF
27. Silicalite-1/PDMS Hybrid Membranes on Porous PVDF Supports: Preparation, Structure and Pervaporation Separation of Dichlorobenzene Isomers.
- Author
-
He, Qiuping, Chen, Wei, Wang, Pengfei, and Dou, Xiaoming
- Subjects
- *
PERVAPORATION , *DICHLOROBENZENE , *ISOMERS , *POLYVINYLIDENE fluoride , *ZEOLITES , *CHEMICAL industry - Abstract
Separation of dichlorobenzene (DCB) isomers with high purity by time− and energy−saving methods from their mixtures is still a great challenge in the fine chemical industry. Herein, silicalite-1 zeolites/polydimethylsiloxane (PDMS) hybrid membranes (silicalite-1/PDMS) have been successfully fabricated on the porous polyvinylidene fluoride (PVDF) supports to first investigate the pervaporation separation properties of DCB isomers. The morphology and structure of the silicalite-1 zeolites and the silicalite-1/PDMS/PVDF hybrid membranes were characterized by XRD, FTIR, SEM and BET. The results showed that the active silicalite-1/PDMS layers were dense and continuous without any longitudinal cracks and other defects with the silicalite-1 zeolites content no more than 10%. When the silicalite-1 zeolites content exceeded 10%, the surfaces of the active silicalite-1/PDMS layers became rougher, and silicalite-1 zeolites aggregated to form pile pores. The pervaporation experiments both in single-isomer and binary−isomer systems for the separation of DCB isomers was further carried out at 60 °C. The results showed that the silicalite-1/PDMS/PVDF hybrid membranes with 10% silicalite-1 zeolites content had better DCB selective separation performance than the silicalite-1/α−Al2O3 membranes prepared by template method. The permeate fluxes of the DCB isomers increased in the order of m−DCB < o−DCB < p−DCB both in single-isomer and binary-isomers solutions for the silicalite-1/PDMS/PVDF hybrid membranes. The separation factor of the silicalite-1/PDMS/PVDF hybrid membranes for p/o−DCB was 2.9 and for p/m−DCB was 4.6 in binary system. The permeate fluxes of the silicalite-1/PDMS/PVDF hybrid membranes for p−DCB in p/o−DCB and p/m−DCB binary−isomers solutions were 126.2 g∙m−2∙h−1 and 104.3 g∙m−2∙h−1, respectively. The thickness−normalized pervaporation separation index in p/o−DCB binary−isomers solutions was 4.20 μm∙kg∙m−2∙h−1 and in p/m−DCB binary−isomers solutions was 6.57 μm∙kg∙m−2∙h−1. The results demonstrated that the silicalite-1/PDMS/PVDF hybrid membranes had great potential for pervaporation separation of DCB from their mixtures. [ABSTRACT FROM AUTHOR] more...
- Published
- 2022
- Full Text
- View/download PDF
28. Preparation and characterization of PVDF hybrid membranes by embedding nanomaterials as silica gel and clay: evaluation of the removal efficiency of nickel and copper ions from water.
- Author
-
Chabane, Mustapha, Tavolaro, Adalgisa, Russo, Francesca, Chiappetta, Giovanni, Dahmani, Benamar, and Figoli, Alberto
- Subjects
DIFLUOROETHYLENE ,PHASE transitions ,COPPER ions ,SILICA gel ,HYDRAULIC measurements ,CONTACT angle ,NICKEL - Abstract
The aim of this research is to study the effect of silica gel and montmorillonite clay (maghnite), often used as adsorbents in chemical applications, on the structure of hybrid poly(vinylidene fluoride) (PVDF) membranes. The membranes were synthesized using the precipitation-phase inversion method. In order to recognize the different structural changes of the PVDF in the samples various characterization techniques were tested, such as the contact angle, the scanning electron microscopy, the attenuated total reflectance-Fourier-transform infrared spectroscopy, porosity, measurement of pore size and measurements of hydraulic permeability. The review of the results allowed us to understand the effects of silica gel and maghnite on the PVDF membranes in terms of crystal phases transition, hydrophobic character, porosity, morphology and pure water permeability. The synthesized membranes were tested for the removal of copper and nickel from aqueous solution. [ABSTRACT FROM AUTHOR] more...
- Published
- 2022
- Full Text
- View/download PDF
29. Electrical devices based on hybrid membranes with mechanically and magnetically controllable, resistive, capacitive and piezoelectric properties.
- Author
-
Bica, Ioan and Anitas, Eugen Mircea
- Abstract
Cotton fabric based membranes containing carbonyl iron microparticles with and without barium titanate nanoparticles (nBaTiO
3 ) are fabricated. The hybrid membranes (hMs) are inserted between two copper electrodes, reinforced with glass fiber and epoxy resin. The resulted assembly is introduced in a silicone rubber sheath, and plane electrical devices (EDs) are obtained. Here, it is shown that using nBaTiO3 , the EDs are characterized by resistive, capacitive and piezoelectric functions which have the property of being controllable in a field of mechanical forces, in a magnetic field or a combinations of the two. This is revealed by measuring the electrical resistance, capacitance and voltage at the output terminals of the devices. The electric voltage generator property of the devices is conferred by the presence of nBaTiO3 . These effects allow us to conclude that the hMs offer the possibility of manufacturing low-cost and ecological EDs for various applications such as vibration, magnetic field and mechanical deformations sensors, electric generators etc. [ABSTRACT FROM AUTHOR] more...- Published
- 2022
- Full Text
- View/download PDF
30. In Situ Grown Tungsten Trioxide Nanoparticles on Graphene Oxide Nanosheet to Regulate Ion Selectivity of Membrane for High Performance Vanadium Redox Flow Battery.
- Author
-
Ye, Jiaye, Zheng, Chunhua, Liu, Jie, Sun, Tianfu, Yu, Shuhui, and Li, Huiyun
- Subjects
- *
VANADIUM redox battery , *GRAPHENE oxide , *TUNGSTEN trioxide , *SANDWICH construction (Materials) , *NANOPARTICLES , *WATER purification , *FUEL cells - Abstract
The application of vanadium redox flow batteries (VRFBs) has encountered challenges because the most commonly used commercial membrane (perfluorinated sulfonic acid, PFSA) has severe vanadium ion permeation, which yields poor stability of the battery. Herein, a PFSA‐based hybrid membrane with a sandwich structure created using a reinforced polytetrafluoroethylene thin layer with hydrophilic nanohybrid fillers is developed. The tungsten trioxide (WO3) nanoparticles are in situ grown on the surface of graphene oxide (GO) nanosheets to overcome the electrostatic effect, and to enhance the hydrophilicity and dispersibility of GO nanosheets, which is embedded in the PFSA matrix to act as a "barrier" to reduce vanadium ions permeation. In addition, these hydrophilic WO3 nanoparticles on GO nanosheets surface serve as proton active sites to facilitate proton transportation. As a result, at 120 cm−2, the cell of the hybrid membrane displays high Coulombic efficiency (over 98.1%) and high energy efficiency (up to 88.9%), better than the commercial Nafion 212 membrane at the same condition. These performances indicate the proposed hybrid membrane is applicable for VRFB application. Also, this design method of the membrane can be extended to other fields including water treatments and fuel cells. [ABSTRACT FROM AUTHOR] more...
- Published
- 2022
- Full Text
- View/download PDF
31. Amyloid-intercalated graphene oxide membranes for enhanced nanofiltration
- Author
-
Alice C. Lin, Fangyou Xie, Russell Chang, Nicholas Beaver, Claire Drewery, Catherine Collins, Corinne Lehr, Eric M. Jones, and Shanju Zhang
- Subjects
Hybrid membranes ,Intercalation ,Protein amyloid fibrils ,Graphene oxide ,Membrane nanofiltration ,Chemistry ,QD1-999 - Abstract
We report on fast pressure-driven nanofiltration of strong GO membranes intercalated by protein amyloid fibrils. We investigate the effect of protein amyloid fibril loading on membrane properties including the membrane stability, microstructure, reflux rate, permeance, rejection rate and fouling resistance. With increasing amyloid fibrils, the membrane becomes smooth and resilient and can be reused for many times with little disintegration. Microstructure analysis shows that amyloid fibrils enable expansion of the interlayer spacing between GO sheets, leading to around 100% increase in average water permeance of the 100 nm thick membrane (15.6 L⋅m−2⋅hr−1⋅bar−1) compared to the neat GO membrane (8.8 L⋅m−2⋅hr−1⋅bar−1). The hybrid membranes display improved moderate ion rejection (44–51%) of heavy metal salts and high molecular rejection (>97%) of organic dyes. Antifouling performance is evaluated in terms of flux recovery ratio and fouling ratios. The incorporation of amyloid fibrils enable GO membranes to change from irreversible fouling to reversible fouling and the hybrid membrane exhibits significantly enhanced flux recovery (>95%). A possible nanofiltration mechanism is proposed to explain the observations. more...
- Published
- 2021
- Full Text
- View/download PDF
32. Polyethersulfone coated Ag-SiO2 nanoparticles: a multifunctional and ultrafiltration membrane with improved performance.
- Author
-
Khan, Shahid Ali, Rehan, Zulfiqar Ahmad, Alharthi, Salman S., Alosaimi, Eid H., Gzara, Lassaad, El-Shahawi, M. S., Alamry, Khalid A., Akhtar, Kalsoom, Bakhsh, Esraa M., Asiri, Abdullah M., Khan, Sher Bahadar, and Drioli, Enrico more...
- Subjects
POLYETHERSULFONE ,ULTRAFILTRATION ,CONTACT angle ,COMPOSITE membranes (Chemistry) ,NANOPARTICLES ,SERUM albumin ,PERMEABILITY - Abstract
Silver-silica (Ag-SiO2) embedded in polyethersulfone (PES) composite membranes were prepared by adding different ratios of Ag-SiO2 in PES and designated as PES-Ag-SiO2-01 ~ PES-Ag-SiO2-05. The synthesized hybrid membranes were investigated to check the influence of Ag-SiO2 on the morphology, hydrophilicity, porosity, mechanical properties, water permeability, bovine serum albumin (BSA) separation, nitrophenol adsorption and antibacterial characteristics of the hybrid membranes. The inclusion of Ag-SiO2 enhanced the porosity of PES hybrid membranes (79% ~ 84.7%) and as result, the hybrid membranes exhibited lower mechanical properties comparative to PES membranes. However, the hydrophilicity of the PES hybrid membranes was enhanced by adding Ag-SiO2 nanoparticles causing a gradual decrease in contact angle (73.4° to 58.8°). The hybrid membranes displayed higher water permeability and nitrophenol adsorption as compared to pure PES and furthermore these properties were enhanced by increasing Ag-SiO2 content in the PES hybrid membrane. The hybrid membrane with higher contents of Ag-SiO2 showed a water flux of 127.7 L/hm2 which is much greater than pure PES membrane (73.30 L/hm2). In addition, the PES hybrid membrane exhibited a strong BSA rejection and PES-Ag-SiO2-04 showed a maximum BSA rejection (91%). The incorporation of Ag-SiO2 nanoparticles improved the antimicrobial activity of the membranes which strongly depend on the contents of nanoparticles. [ABSTRACT FROM AUTHOR] more...
- Published
- 2021
- Full Text
- View/download PDF
33. A Novel Hybrid Membrane for Urinary Conduit Substitutes Based on Small Intestinal Submucosa Coupled with Two Synthetic Polymers
- Author
-
Martina Casarin, Martina Todesco, Deborah Sandrin, Filippo Romanato, Andrea Bagno, Alessandro Morlacco, and Fabrizio Dal Moro
- Subjects
small intestinal submucosa ,decellularization ,polycarbonate urethane ,hybrid membranes ,hybrid materials ,urinary diversions ,Biotechnology ,TP248.13-248.65 ,Medicine (General) ,R5-920 - Abstract
Among the urinary tract’s malignancies, bladder cancer is the most frequent one: it is at the tenth position of most common cancers worldwide. Currently, the gold standard therapy consists of radical cystectomy, which results in the need to create a urinary diversion using a bowel segment from the patient. Nevertheless, due to several complications associated with bowel resection and anastomosis, which significantly affect patient quality of life, it is becoming extremely important to find an alternative solution. In our recent work, we proposed the decellularized porcine small intestinal submucosa (SIS) as a candidate material for urinary conduit substitution. In the present study, we create SIS-based hybrid membranes that are obtained by coupling decellularized SIS with two commercially available polycarbonate urethanes (Chronoflex AR and Chronoflex AR-LT) to improve SIS mechanical resistance and impermeability. We evaluated the hybrid membranes by means of immunofluorescence, two-photon microscopy, FTIR analysis, and mechanical and cytocompatibility tests. The realization of hybrid membranes did not deteriorate SIS composition, but the presence of polymers ameliorates the mechanical behavior of the hybrid constructs. Moreover, the cytocompatibility tests demonstrated a significant increase in cell growth compared to decellularized SIS alone. In light of the present results, the hybrid membrane-based urinary conduit can be a suitable candidate to realize a urinary diversion in place of an autologous intestinal segment. Further efforts will be performed in order to create a cylindrical-shaped hybrid membrane and to study its hydraulic behavior. more...
- Published
- 2022
- Full Text
- View/download PDF
34. Construction of new alternative transmission sites by incorporating structure-defect metal-organic framework into sulfonated poly(arylene ether ketone sulfone)s.
- Author
-
Zhang, Zhenguo, Ren, Jiahui, Ju, Mengchi, Chen, Xuan, Xu, Jingmei, Wang, Zhe, Meng, Lingxin, Zhao, Pengyun, and Wang, Hao
- Subjects
- *
METAL-organic frameworks , *SULFONES , *POLYETHERS , *PROTON conductivity , *CHEMICAL stability , *FUMARATES , *LEWIS acidity - Abstract
Metal-organic frameworks are new kinds of porous crystalline materials. The Zr-based metal-organic framework (MOF-801) is consists of [Zr 6 (u 3 -O) 4 (u 3 -OH) 4 ]12+ clusters and fumaric acid connectors. MOF-801 has excellent mechanical properties, high chemical stability and high water absorption capacity. There are a large number of hydrophilic functional groups inside MOF-801, which is effective to promote interfacial compatibility between MOF-801 and polymer matrixes. In this work, the MOF-801 with structural defects was synthesized through the solvothermal method by adding excess formic acids as the regulator. These structural defects could confer MOF-801 high surface area (2476.34 m2 g−1) and promote the water absorption capacity. Moreover, structural defects could also expose more open metal sites of MOF-801, thereby increasing the Lewis acidity of MOF-801. Then, the hybrid membranes were synthesized by combining the MOF-801 with structural defects and C-SPAEKS. Dense hydrogen-bond networks formed between the MOF-801 and C-SPAEKS further promote enhance proton conductivity. At the condition of 90 °C and 100% relative humidity, the highest proton conductivity of hybrid membranes reached 0.100 S cm−1, which is similar to that of Nafion 117. Meanwhile, these hybrid membranes showed outstanding chemical and thermal stabilities. These results indicate that these hybrid membranes have potential as proton exchange membranes. The synthesized structure-defect MOF-801 has uniform crystal size, and hybrid membranes show good proton conductivities because of hydrogen-bond networks between C-SPAEKS and MOF-801 can provide hopping sites for protons. [Display omitted] • MOF-801 with good water absorption and chemical stability was synthesized. • Hybrid PEMs with enhanced proton-conducting performance were prepared. • Hydrogen-bonds between MOF-801 and C-SPAEKS construct new proton transport channels. • Open metal sites (Zr4+) promote protonation of H 2 O and then enhance proton transfer. [ABSTRACT FROM AUTHOR] more...
- Published
- 2021
- Full Text
- View/download PDF
35. Advanced hybrid membranes for efficient nickel retention from simulated wastewater.
- Author
-
Sandu, Teodor, Chiriac, Anita Laura, Tsyntsarski, Boyko, Stoycheva, Ivanka, Căprărescu, Simona, Damian, Celina Maria, Iordache, Tanța Verona, Pătroi, Delia, Marinescu, Virgil, and Sârbu, Andrei
- Subjects
VINYL acetate ,METHACRYLIC acid ,ACRYLIC acid ,DEUTERIUM oxide ,ACTIVATED carbon ,NICKEL - Abstract
This paper describes the preparation of a new type of hybrid material suitable to be used for the amendment of wastewaters laden with Ni ions relying on two purification principles, mechanical and adsorption. The membranes were prepared using as first component copolymers of acrylonitrile with vinyl acetate, acrylic acid or methacrylic acid. The second component of the developed membranes consisted of powdered activated carbon (PAC), of natural or synthetic origin, used in a content of either 4% or 8%. In this way, separation based on porosity is combined with the adsorptive properties of PAC. Hybrid membranes, prepared by phase inversion, were fully characterized by Fourier transform IR (FTIR) spectroscopy, pure water flux analysis, TGA, SEM, Brunauer–Emmett–Teller analysis and XRD. Moreover, water amendment was also investigated using synthetic water bearing heavy metals, in our case nickel, a laboratory electrodialysis set‐up being used for this purpose. FTIR revealed that the use of PAC led to several peaks at low wavelength (900–650 cm−1). Pure water flux values vary in a fairly wide range, from 0.02 to almost 1.00, depending on the preparation conditions. It can be concluded that the final properties of the developed membranes may be adjusted by changing either the copolymer or the PAC. An additional control is provided by the amount of PAC. The developed membranes were found to achieve an enhanced release of Ni ions, as the percentage of extraction was at least 51%. © 2021 Society of Chemical Industry [ABSTRACT FROM AUTHOR] more...
- Published
- 2021
- Full Text
- View/download PDF
36. A Review on Removal and Destruction of Per- and Polyfluoroalkyl Substances (PFAS) by Novel Membranes
- Author
-
Suman Das and Avner Ronen
- Subjects
PFAS ,nanofiltration ,reverse osmosis ,novel membranes ,hybrid membranes ,coupled technology ,Chemical technology ,TP1-1185 ,Chemical engineering ,TP155-156 - Abstract
Per- and Polyfluoroalkyl Substances (PFAS) are anthropogenic chemicals consisting of thousands of individual species. PFAS consists of a fully or partly fluorinated carbon–fluorine bond, which is hard to break and requires a high amount of energy (536 kJ/mole). Resulting from their unique hydrophobic/oleophobic nature and their chemical and mechanical stability, they are highly resistant to thermal, chemical, and biological degradation. PFAS have been used extensively worldwide since the 1940s in various products such as non-stick household items, food-packaging, cosmetics, electronics, and firefighting foams. Exposure to PFAS may lead to health issues such as hormonal imbalances, a compromised immune system, cancer, fertility disorders, and adverse effects on fetal growth and learning ability in children. To date, very few novel membrane approaches have been reported effective in removing and destroying PFAS. Therefore, this article provides a critical review of PFAS treatment and removal approaches by membrane separation systems. We discuss recently reported novel and effective membrane techniques for PFAS separation and include a detailed discussion of parameters affecting PFAS membrane separation and destruction. Moreover, an estimation of cost analysis is also included for each treatment technology. Additionally, since the PFAS treatment technology is still growing, we have incorporated several future directions for efficient PFAS treatment. more...
- Published
- 2022
- Full Text
- View/download PDF
37. Nanofiber based hybrid sulfonated silica/P(VDF-TrFE) membranes for PEM fuel cells.
- Author
-
Rajabalizadeh Mojarrad, Naeimeh, Iskandarani, Bilal, Taşdemir, Adnan, Yürüm, Alp, Alkan Gürsel, Selmiye, and Yarar Kaplan, Begüm
- Subjects
- *
PROTON exchange membrane fuel cells , *ION-permeable membranes , *DIRECT methanol fuel cells , *POLYELECTROLYTES , *POLYMERIC membranes , *PROTON conductivity , *CONDUCTING polymers , *SILICA fibers - Abstract
In this study, novel nanofiber based-hybrid proton conducting membranes for polymer electrolyte membrane (PEM) fuel cells were fabricated via electrospinning method using sulfonated silica particles (S–SiO 2) as a functional additive. Here, poly(vinylidene fluoride- co -trifluoroethylene) (P(VDF-TrFE)) was used as the carrier polymer during electrospinning step for the fabrication of PEM fuel cell membrane structure for the first time in literature. The effect of electrospinning conditions, i.e. namely, solvent, carrier polymer, electrospinning voltage, relative humidity, and flow rate on the uniformity of the resultant electrospun mats, and the average fiber diameter, respectively, were investigated in detail. Furthermore, electrospinning was conducted with poly(vinylidene fluoride) (PVDF) as the carrier polymer to compare with (P(VDF-TrFE)) as well. S–SiO 2 particles were homogeneously distributed along the carrier polymer without any noticeable bead formation. After electrospinning, fiber mats were transformed into dense membranes via hot-pressing and subsequent Nafion® impregnation. After obtaining the densified membrane, proton conductivity, water uptake and mechanical strength of the hybrid membranes were examined and reported as well. Consequently, hybrid membrane with P(VDF-TrFE) carrier exhibited a superior proton conductivity (102 mS/cm) benchmarked with PVDF carrier polymer containing membrane (43 mS/cm) and solution casted Nafion® membrane (95 mS/cm) at the same conditions. [Display omitted] • Sulfonated silica-based electrospun membranes with different carrier polymers were prepared. • P(VDF-TrFE) was used as the carrier polymer for electrospun fuel cell membrane for the first time. • Highly conducting PVDF-TrFE/S–SiO 2 membranes by electrospinning were shown for the first time. • Homogenously distributed S–SiO 2 particles both on P(VDF-TrFE) and PVDF carriers were achieved. • P(VDF-TrFE) based membranes showed a superior proton conductivity compared to PVDF based ones. [ABSTRACT FROM AUTHOR] more...
- Published
- 2021
- Full Text
- View/download PDF
38. Optimizing Archaeal Lipid Biosynthesis in Escherichia coli .
- Author
-
Hoekzema M, Jiang J, and Driessen AJM
- Subjects
- Metabolic Engineering methods, Archaea metabolism, Archaea genetics, Membrane Lipids metabolism, Membrane Lipids biosynthesis, Terpenes metabolism, Organophosphorus Compounds metabolism, Hemiterpenes metabolism, Hemiterpenes biosynthesis, Phospholipids biosynthesis, Phospholipids metabolism, Cardiolipins metabolism, Cardiolipins biosynthesis, CDPdiacylglycerol-Serine O-Phosphatidyltransferase metabolism, CDPdiacylglycerol-Serine O-Phosphatidyltransferase genetics, Membrane Proteins, Transferases (Other Substituted Phosphate Groups), Escherichia coli metabolism, Escherichia coli genetics
- Abstract
Membrane lipid chemistry is remarkably different in archaea compared with bacteria and eukaryotes. In the evolutionary context, this is also termed the lipid divide and is reflected by distinct biosynthetic pathways. Contemporary organisms have almost without exception only one type of membrane lipid. During early membrane evolution, mixed membrane stages likely occurred, and it was hypothesized that the instability of such mixtures was the driving force for the lipid divide. To examine the compatibility between archaeal and bacterial lipids, the bacterium Escherichia coli has been engineered to contain both types of lipids with varying success. Only limited production of archaeal lipid archaetidylethanolamine was achieved. Here, we substantially increased its production in E. coli by overexpression of an archaeal phosphatidylserine synthase needed for ethanolamine headgroup attachment. Furthermore, we introduced a synthetic isoprenoid utilization pathway to increase the supply of isopentenyl-diphosphate and dimethylallyl diphosphate. This improved archaeal lipid production substantially. The archaeal phospholipids also served as a substrate for the E. coli cardiolipin synthase, resulting in archaeal and novel hybrid archaeal/bacterial cardiolipin species not seen in living organisms before. Growth of the E. coli strain with the mixed membrane shows an enhanced sensitivity to the inhibitor of fatty acid biosynthesis, cerulenin, indicating a critical dependence of the engineered E. coli strain on its native phospholipids. more...
- Published
- 2024
- Full Text
- View/download PDF
39. Advances in Polyvinyl Alcohol-Based Membranes for Fuel Cells: A Comprehensive Review on Types, Synthesis, Modifications, and Performance Optimization.
- Author
-
Madhuranthakam CMR, Abudaqqa WSK, and Fowler M
- Abstract
Fuel cell technology is at the forefront of sustainable energy solutions, and polyvinyl alcohol (PVA) membranes play an important role in improving performance. This article thoroughly investigates the various varieties of PVA membranes, their production processes, and the numerous modification tactics used to solve inherent problems. Various methods were investigated, including chemical changes, composite blending, and the introduction of nanocomposites. The factors impacting PVA membranes, such as proton conductivity, thermal stability, and selectivity, were investigated to provide comprehensive knowledge. By combining various research threads, this review aims to completely investigate the current state of PVA membranes in fuel cell applications, providing significant insights for both academic researchers and industry practitioners interested in efficient and sustainable energy conversion technologies. The transition from traditional materials such as Nafion to PVA membranes has been prompted by limitations associated with the former, such as complex synthesis procedures, reduced ionic conductivity at elevated temperatures, and prohibitively high costs, which have hampered their widespread adoption. As a result, modern research efforts are increasingly focused on the creation of alternative membranes that can compete with conventional technical efficacy and economic viability in the context of fuel cell technologies. more...
- Published
- 2024
- Full Text
- View/download PDF
40. Efficient Delivery of Lomitapide using Hybrid Membrane-Coated Tetrahedral DNA Nanostructures for Glioblastoma Therapy.
- Author
-
Song M, Tian J, Wang L, Dong S, Fu K, Chen S, and Liu C
- Subjects
- Animals, Mice, Humans, Cell Line, Tumor, Blood-Brain Barrier metabolism, Nanostructures chemistry, Antineoplastic Agents chemistry, Antineoplastic Agents pharmacology, Drug Carriers chemistry, Benzimidazoles chemistry, Brain Neoplasms drug therapy, Brain Neoplasms pathology, Glioblastoma drug therapy, Glioblastoma pathology, Glioblastoma metabolism, DNA chemistry
- Abstract
Glioblastoma (GBM) is the most aggressive and prevalent primary malignant tumor of the central nervous system. Traditional chemotherapy has poor therapeutic effects and significant side effects due to drug resistance, the natural blood-brain barrier (BBB), and nonspecific distribution, leading to a lack of clinically effective therapeutic drugs. Here, 1430 small molecule compounds are screened based on a high-throughput drug screening platform and a novel anti-GBM drug, lomitapide (LMP) is obtained. Furthermore, a bionic nanodrug delivery system (RFA NPs) actively targeting GBM is constructed, which mainly consists of tetrahedral DNA nanocages (tFNA NPs) loaded with LMP as the core and a folate-modified erythrocyte-cancer cell-macrophage hybrid membrane (FRUR) as the shell. FRUR camouflage conferred unique features on tFNA NPs, including excellent biocompatibility, improved pharmacokinetic profile, efficient BBB permeability, and tumor targeting ability. The results show that the LMP RFA NPs exhibited superior and specific anti-GBM activities, reduced off-target drug delivery, prolonged lifespan, and has negligible side effects in tumor-bearing mice. This study combines high-throughput drug screening with biomimetic nanodrug delivery system technology to provide a theoretical and practical basis for drug development and the optimization of clinical treatment strategies for GBM treatment., (© 2024 Wiley‐VCH GmbH.) more...
- Published
- 2024
- Full Text
- View/download PDF
41. Long-term durable solid state electrolyte membranes based on a metal–organic framework with phosphotungstic acid confined in the mesoporous cages.
- Author
-
Zhang, Zhenguo, Ren, Jiahui, Xu, Jingmei, Meng, Lingxin, Zhao, Pengyun, and Wang, Zhe
- Subjects
- *
PHOSPHOTUNGSTIC acids , *SUPERIONIC conductors , *METAL-organic frameworks , *PROTON conductivity , *SULFONES , *POLYETHERS , *CARBOXYL group - Abstract
In this study, phosphotungstic acid-encapsulated MIL-101 (Fe) (HPW@MIL-100 (Fe)) was synthesized by the in-situ direct hydrothermal method. Due to the large mesoporous cages and small microporous windows of MIL-100 (Fe), HPW could be well loaded and confined in the cages of MIL-100 (Fe). Furthermore, novel hybrid proton exchange membranes were fabricated by incorporating HPW@MIL-100 (Fe) into sulfonated poly (arylene ether ketone sulfone) containing carboxyl groups (C-SPAEKS) matrix. The structures of MIL-100 (Fe), HPW@MIL-100 (Fe), C-SPAEKS, and hybrid membranes were characterized by XRD and FT-IR. The HPW@MIL-100 (Fe), with a large amount of phosphotungstic acid in cages, could enhance the proton conductivities of hybrid membranes. The hybrid membrane with 4% content of HPW@MIL-100 (Fe) achieved a high proton conductivity of 0.072 S cm−1 at 80 °C and 100% relative humidity, which was 1.8 times higher than that of pure C-SPAEKS (0.040 S cm−1) at the same conditions. Meanwhile, the introduced HPW@MIL-100 (Fe) fillers improved the dimensional stability of hybrid membranes. These results indicate that introduction of MIL-100 (Fe) materials loaded with HPW plays an important role in improving the comprehensive performance and this series of hybrid membranes have potential as proton exchange membranes. Image 1 • The HPW@MIL-100 (Fe) was synthesized by the in-situ direct hydrothermal method. • The HPW was well incorporated in the large mesoporous cages of MIL-100 (Fe). • The small microporous windows of MIL-100 (Fe) avoided the loss of the HPW. • The HPW@MIL-100 (Fe) enhanced the proton conductivities of hybrid membranes. [ABSTRACT FROM AUTHOR] more...
- Published
- 2020
- Full Text
- View/download PDF
42. Enhanced desulfurization performance of hybrid membranes using embedded hierarchical porous SBA-15.
- Author
-
Zhang, Ye, Song, Jian, Mayta, Josue Quispe, Pan, Fusheng, Gao, Xue, Li, Mei, Song, Yimeng, Wang, Meidi, Cao, Xingzhong, and Jiang, Zhongyi
- Abstract
The utilization of materials with a hierarchical porous structure as multi-functional additives is highly attractive in the preparation of hybrid membranes. In this study, novel hybrid membranes are designed by embedding hierarchical porous Santa Barbara Amorphous 15 (SBA-15) with a dual-pore architecture (micropores and mesopores) for pervaporation desulfurization. The SBA-15 with cylindrical mesopores provides molecular transport expressways to ensure improved permeability, while micropores on the wall have molecular sieving effects that are essential for the enhancement of permselectivity of thiophene molecules. Considering thiophene/n-octane mixture as a model system, the hybrid membrane with embedded 6 wt-% SBA-15 exhibits optimal pervaporation desulfurization performance with a permeation flux of 22.07 kg·m
−2 ·h−1 and an enrichment factor of 6.76. Moreover, the detailed structure and properties of hybrid membranes are systematically characterized. This study demonstrates the immense potential of hierarchical porous materials as additives in membranes to simultaneously increase permeability and permselectivity. [ABSTRACT FROM AUTHOR] more...- Published
- 2020
- Full Text
- View/download PDF
43. Membrane materials for energy production and storage.
- Author
-
Yaroslavtsev, A. B., Stenina, I. A., and Golubenko, D. V.
- Subjects
- *
ION-permeable membranes , *ENERGY storage , *LITHIUM-ion batteries , *FUEL cells , *GAS as fuel , *IONIC conductivity , *APROTIC solvents - Abstract
Ion exchange membranes are widely used in chemical power sources, including fuel cells, redox batteries, reverse electrodialysis devices and lithium-ion batteries. The general requirements for them are high ionic conductivity and selectivity of transport processes. Heterogeneous membranes are much cheaper but less selective due to the secondary porosity with large pore size. The composition of grafted membranes is almost identical to heterogeneous ones. But they are more selective due to the lack of secondary porosity. The conductivity of ion exchange membranes can be improved by their modification via nanoparticle incorporation. Hybrid membranes exhibit suppressed transport of co-ions and fuel gases. Highly selective composite membranes can be synthesized by incorporating nanoparticles with modified surface. Furthermore, the increase in the conductivity of hybrid membranes at low humidity is a significant advantage for fuel cell application. Proton-conducting membranes in the lithium form intercalated with aprotic solvents can be used in lithium-ion batteries and make them more safe. In this review, we summarize recent progress in the synthesis, and modification and transport properties of ion exchange membranes, their transport properties, methods of preparation and modification. Their application in fuel cells, reverse electrodialysis devices and lithium-ion batteries is also reviewed. [ABSTRACT FROM AUTHOR] more...
- Published
- 2020
- Full Text
- View/download PDF
44. A Light‐Responsive Metal–Organic Framework Hybrid Membrane with High On/Off Photoswitchable Proton Conductivity.
- Author
-
Liang, Hong‐Qing, Guo, Yi, Shi, Yanshu, Peng, Xinsheng, Liang, Bin, and Chen, Banglin
- Subjects
- *
METAL-organic frameworks , *PROTON conductivity , *CHEMICAL detectors , *FIELD-effect transistors , *PROTONS , *FUEL cells - Abstract
Mimicking biological proton pumps to achieve stimuli‐responsive protonic solids has long been of great interest for their diverse applications in fuel cells, chemical sensors, and bio‐electronic devices. Now, dynamic light‐responsive metal–organic framework hybrid membranes can be obtained by in situ encapsulation of photoactive molecules (sulfonated spiropyran, SSP), as the molecular valve, into the cavities of the host ZIF‐8. The configuration of SSP can be changed and switched reversibly in response to light, generating different mobile acidic protons and thus high on/off photoswitchable proton conductivity in the hybrid membranes and device. This device exhibits a high proton conductivity, fast response time, and extremely large on/off ratio upon visible‐light irradiation. This approach might provide a platform for creating emerging smart protonic solids with potential applications in the remote‐controllable chemical sensors or proton‐conducting field‐effect transistors. [ABSTRACT FROM AUTHOR] more...
- Published
- 2020
- Full Text
- View/download PDF
45. Preparation of hybrid membranes by incorporating hydrophilic UiO-66 nanoparticles for high-performance pervaporation dehydration of aprotic solvents.
- Author
-
Ma, Wenzhong, Li, Taiyu, Zhang, Qi, Zhong, Jing, and Matsuyama, Hideto
- Subjects
- *
PERVAPORATION , *APROTIC solvents , *DEHYDRATION , *NANOPARTICLES , *THERMAL stability - Abstract
Hydrophilic UiO-66 crystals with superior water adsorption ability were synthesized and incorporated into the polyimide (PI) membrane for efficient aprotic solvent separation via pervaporation. The effect of the different UiO-66 addition in the pyromellitic dianhydride (PMDA)-2, 2-bis[4-(4-amlnophenoxy)phenyl]propane (BAPP)-based PI membrane on the membrane structure, thermal stability, surface hydrophilicity, solvent-resistant, and pervaporation performance was systematically studied. The UiO-66/PI hybrid membranes with small amount content (2 wt%) exhibited high hydrophilicity and excellent swelling resistance due to the superb dispersion benefiting from the excellent complexation of UiO-66 and PI chain. The effects of operational variables such as operating temperature and concentration of feed solution on the pervaporation separation performance of the hybrid membranes with different UiO-66 loadings were investigated. When the mass fraction of UiO-66 was 2 wt%, the hybrid membranes show the permeation flux of 109.7 and 57.1 g/(m2h) and separation factor of 34.1 and 133.9, respectively, for DMF/H2O and DMAc/H2O systems. [ABSTRACT FROM AUTHOR] more...
- Published
- 2020
- Full Text
- View/download PDF
46. Investigation of Dip-Coating Parameters Effect on The Performance of Alumina-Polydimethylsiloxane Nanofiltration Membranes for Desalination
- Author
-
Mohammad Hadi Yousefi, Mohamad Mehdi Zerafat, Majid Shokri Doodeji, and Samad Sabbaghi
- Subjects
alumina ,dip-coating ,hybrid membranes ,nanofiltration ,pdms ,Environmental engineering ,TA170-171 - Abstract
The objective of this work is to investigate the effect of dip-coating parameters on the performance of Alumina-PDMS hybrid nanofiltration membranes for water desalination. Ceramic supports used in this work were prepared with a 340 nm average pore size and 34% total porosity. The aim is to determine optimum conditions of dipping time, PDMS concentration, and withdrawal speed in order to achieve high rejection and flux values. Dip-coating parameters were considered as dipping time (60 - 120 s), withdrawal speed (5 - 15 mm/s) and PDMS concentration (10 - 20 wt. %). Hybrid membranes were characterized using FE-SEM and FTIR analysis techniques. Pure water flux and salt rejection were also measured to evaluate the rejection performance. Alumina-PDMS hybrid nanofiltration membranes fabricated with dipping time = 120 s, withdrawal speed = 15 mm/s and 10 wt. % PDMS exhibited the best performance giving 30.5% rejection for NaCl and 53.8% for Na2SO4. more...
- Published
- 2017
- Full Text
- View/download PDF
47. Harnessed Dopant Block Copolymers Assist Decorating Membrane Pores: A Dissipative Particle Dynamics Study.
- Author
-
Wang, Zhikun, Sun, Shuangqing, Lyu, Qiang, Cheng, Meng, Wang, Hongbing, Li, Chunling, Sha, Haoyan, Faller, Roland, and Hu, Songqing
- Subjects
- *
BLOCK copolymers , *DOPING agents (Chemistry) , *PARTICLE dynamics - Abstract
Self‐assembly of asymmetric block copolymers (BCPs) around active pore edges has emerged as an important strategy to produce smart membranes with tunable pathways for solute transport. However, thus far, it is still challenging to manipulate pore shape and functionality for directional transformation under external stimuli. Here, a versatile strategy by mesoscale simulations to design stimuli‐responsive pores with various edge decorations in hybrid membranes is reported. Dopant BCPs are used as decorators to stabilize pore edges and extend their function in reconfiguring pores in response to repeated membrane stretching/shrinking caused by external stimuli. The decoration morphologies are predictable since the assemblies of dopant BCPs around pore edges are closely related to their self‐assemblies in solution. The coassembly between different BCPs in the hybrid membrane for the control of pore morphology is featured, and the parameter settings, including block incompatibility and molecular architecture for the construction of a specific pore, are determined. Results show that harnessed dopant BCPs in the hybrid membrane can enhance pore formation and induce directional pore shape and functionality transformation. Diversified pore decorations exhibit potential that can be further explored in selective solute transport and the design of stimuli‐responsive smart nanodevices. [ABSTRACT FROM AUTHOR] more...
- Published
- 2020
- Full Text
- View/download PDF
48. Transport Properties of MF-4SK Membranes Doped with Sulfonated Zirconia.
- Author
-
Yurova, P. A., Aladysheva, U. S., Stenina, I. A., and Yaroslavtsev, A. B.
- Subjects
- *
ZIRCONIUM oxide , *COMPOSITE materials , *NANOCOMPOSITE materials , *IONIC conductivity - Abstract
Composite materials based on homogeneous perfluorinated MF-4SK cation-exchange membranes and sulfonated zirconia are obtained by in situ and casting methods. Their transport properties and gas-permeability are studied. The introduction of sulfonated zirconia leads to increase the room-temperature conductivity of membranes obtained by the in situ and casting methods more than 1.5- and 4-fold, respectively. For composite membranes synthesized by the in situ and casting methods, the transport numbers of anions that characterize their undesired transport decrease more than 1.5-fold (from 0.026 to 0.020 and from 0.020 to 0.014, respectively). For samples based on MF-4SK membranes and zirconia, the considerable (more than 3-fold) decrease in hydrogen permeability is observed. The differences in the observed values of water uptake, conductivity, and interdiffusion coefficients in composite membranes are discussed. [ABSTRACT FROM AUTHOR] more...
- Published
- 2019
- Full Text
- View/download PDF
49. Development of Hybrid Membrane from Clay/TiO2-PVA for Batik Wastewater Treatment.
- Author
-
Ma'ruf, Anwar, Al Fathoni, M. Agus Salim, Purnawanto, Agus Mulyadi, and Kusumajati, Rina Asih
- Subjects
WASTEWATER treatment ,BATIK ,THERMAL resistance ,CHEMICAL resistance ,RESEARCH & development - Abstract
Hybrid membranes are currently being developed to find the membrane that is having good chemical and thermal resistance. This research devotes to the development of hybrid membrane from clay/TiOscript>2 with PVA polymer and its application for colour wastewater filtration. The results show that the optimum concentration of PVA is 5%. At this condition, the hybrid membrane has a bulk density of 2 g/cc and porosity of 23.13%. The hybrid membrane produces the coefficient rejection of 79.48%. At the higher concentration of PVA, the filtration becomes not effective because the flux of membrane is very low. [ABSTRACT FROM AUTHOR] more...
- Published
- 2019
50. New Proton-Conducting Membranes Based on Phosphorylated Polybenzimidazole and Silica.
- Author
-
Lysova, A. A. and Yaroslavtsev, A. B.
- Subjects
- *
PROTON conductivity , *SILICA , *TRANSMISSION electron microscopy , *GRAFT copolymers , *SCANNING electron microscopy - Abstract
We have synthesized hybrid membranes based on N-phosphorylated polybenzimidazole, containing different percentages of silica (2–20 wt %). The materials have been characterized by scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, IR spectroscopy, and impedance spectroscopy. The membranes have been shown to contain silica nanoparticles with a bimodal size distribution: 3–5 and 20–60 nm. The hybrid membranes have high proton conductivity (9.7 mS/cm at 130°C), which has a maximum when the dopant content is 2–10 wt %. The phosphonic groups grafted onto the polymer ensure additional hydration of the membranes at increased humidity. The addition of silica helps to reduce the gas permeability of the membranes by a factor of ~1.5. [ABSTRACT FROM AUTHOR] more...
- Published
- 2019
- Full Text
- View/download PDF
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.