9,672 results
Search Results
2. Bio-based materials for barrier coatings on paper packaging
- Author
-
Kunam, Praveen Kumar, Ramakanth, Dakuri, Akhila, Konala, and Gaikwad, Kirtiraj K.
- Published
- 2024
- Full Text
- View/download PDF
3. Effects of cellulose nanofibrils and starch compared with polyacrylamide on fundamental properties of pulp and paper.
- Author
-
Tajik M, Jalali Torshizi H, Resalati H, and Hamzeh Y
- Subjects
- Chemical Phenomena, Mechanical Phenomena, Nanofibers ultrastructure, Acrylic Resins chemistry, Biopolymers chemistry, Cellulose chemistry, Nanofibers chemistry, Paper, Starch chemistry
- Abstract
Bio-based additives received significant attention in pulp and paper properties improvement. For this, the most cited biochemical Cellulose Nano Fibrils (CNFs) and Cationic Starch (CS) were experimentally compared with the most declared synthetic chemical, Cationic Polyacrylamide (CPAM). SEM images showed better paper surface filling by the utilization of the chemicals. The three studied polymers, in solely or combination mechanism, improved mainly bagasse pulp and paper properties compared to the blank sample, except for pulp drainage, which decreased by CNFs to lower volumes presumably due to its intrinsic characteristics. Cationic polymers (CP) compared to CP/CNFs approaches increased pulp retention and drainage but decreased paper density and strengths. The best pulp retention and drainage achieved by CS followed by CPAM, while paper air persistency, density, and strength properties evaluated highest by CP/CNFs followed by CNFs. Generally, CS revealed a more significant improvement in pulp and paper properties than CPAM either with or without CNFs., (Copyright © 2021 Elsevier B.V. All rights reserved.)
- Published
- 2021
- Full Text
- View/download PDF
4. Fabrication of Paper Sheets Coatings Based on Chitosan/Bacterial Nanocellulose/ZnO with Enhanced Antibacterial and Mechanical Properties.
- Author
-
Jabłońska J, Onyszko M, Konopacki M, Augustyniak A, Rakoczy R, and Mijowska E
- Subjects
- Anti-Infective Agents, Cellulose ultrastructure, Escherichia coli, Mechanical Tests, Metal Nanoparticles chemistry, Metal Nanoparticles ultrastructure, Microscopy, Electron, Scanning, Microscopy, Electron, Transmission, Nanocomposites ultrastructure, Nanofibers chemistry, Nanofibers ultrastructure, Surface Properties, Tensile Strength, X-Ray Diffraction, Biopolymers chemistry, Biopolymers pharmacology, Cellulose chemistry, Chitosan chemistry, Nanocomposites chemistry, Product Packaging methods, Zinc Oxide chemistry
- Abstract
Here, we designed paper sheets coated with chitosan, bacterial cellulose (nanofibers), and ZnO with boosted antibacterial and mechanical activity. We investigated the compositions, with ZnO exhibiting two different sizes/shapes: (1) rods and (2) irregular sphere-like particles. The proposed processing of bacterial cellulose resulted in the formation of nanofibers. Antimicrobial behavior was tested using E. coli ATCC
® 25922™ following the ASTM E2149-13a standard. The mechanical properties of the paper sheets were measured by comparing tearing resistance, tensile strength, and bursting strength according to the ISO 5270 standard. The results showed an increased antibacterial response (assigned to the combination of chitosan and ZnO, independent of its shape and size) and boosted mechanical properties. Therefore, the proposed composition is an interesting multifunctional mixture for coatings in food packaging applications.- Published
- 2021
- Full Text
- View/download PDF
5. Microcrystalline cellulose and by-products from the pulp and paper industry as reinforcing fibres for polybutylene succinate-based composites: A comparative study.
- Author
-
Sousa, Francisco JPM, Jesus, Carolina F, Góis, Joana R, Pereira, Nelson AM, and Antunes, Filipe E
- Subjects
- *
SEWAGE disposal plants , *CHEMICAL purification , *MODULUS of elasticity , *PAPER industry , *CIRCULAR economy - Abstract
This study focussed on the development of fully biodegradable composites based on polybutylene succinate (PBS) in combination with raw materials from different processing stages of the pulp and paper industry. Sulfite pulp (SP), kraft pulp (KP) and screened sludge residue (SL) from wastewater treatment plants (WWTP) were investigated as reinforcing fibres contributing to a circular economy. We report a comparative study of the physicochemical properties and mechanical performance of PBS composites reinforced with these cellulosic raw fibres and commercial pure microcrystalline cellulose (MC). The composites were characterised in tensile strength, elongation at break, modulus of elasticity, water absorption and wettability. The incorporation of the fibres into the polymer matrix was also investigated using torque rheometry. Critical concentrations were obtained with maximum incorporation in the range of 15–20 wt% for SP/KP and 25–30 wt% for SL. SP and KP composites showed at least as good physicochemical and mechanical properties as MC at the concentrations studied (0–20 wt%). SP-composites showed the highest tensile strength and modulus of elasticity. It was shown that these fibres from the pulp and paper industry can be used as reinforcement for PBS matrices without additional chemical purification and provide a valuable alternative to commercial microcrystalline cellulose. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
6. Effects of HCl Hydrolyzed Cellulose Nanocrystals From Waste Papers on the Hydroxypropyl Methylcellulose/Cationic Starch Biofilms
- Author
-
Vaezi, Khashayar and Asadpour, Ghasem
- Published
- 2022
- Full Text
- View/download PDF
7. Detection of an amphiphilic biosample in a paper microchannel based on length.
- Author
-
Chen YT and Yang JT
- Subjects
- Adsorption, Biopolymers chemistry, Diffusion, Equipment Design, Equipment Failure Analysis, Filtration instrumentation, Reproducibility of Results, Sensitivity and Specificity, Surface-Active Agents chemistry, Biopolymers analysis, Lab-On-A-Chip Devices, Paper, Reagent Strips, Surface-Active Agents analysis
- Abstract
We developed a simple method to achieve semiquantitative detection of an amphiphilic biosample through measuring the length of flow on a microfluidic analytical device (μPAD) based on paper. When an amphiphilic sample was dripped into a straight microchannel defined with a printed wax barrier (hydrophobic) on filter paper (hydrophilic), the length of flow was affected by the reciprocal effect between the sample, the filter-paper channel and the wax barrier. The flow length decreased with increasing concentration of an amphiphilic sample because of adsorption of the sample on the hydrophobic barrier. Measurement of the flow length enabled a determination of the concentration of the amphiphilic sample. The several tested samples included surfactants (Tween 20 and Triton X-100), oligonucleotides (DNA), bovine serum albumin (BSA), human albumin, nitrite, glucose and low-density lipoprotein (LDL). The results show that the measurement of the flow length determined directly the concentration of an amphiphilic sample, whereas a non-amphiphilic sample was not amenable to this method. The proposed method features the advantages of small cost, simplicity, convenience, directness, rapidity (<5 min) and requirement of only a small volume (5 μL) of sample, with prospective applications in developing areas and sites near patients for testing at a point of care (POCT).
- Published
- 2015
- Full Text
- View/download PDF
8. A comparative study of biopolymers and alum in the separation and recovery of pulp fibres from paper mill effluent by flocculation.
- Author
-
Mukherjee S, Mukhopadhyay S, Pariatamby A, Ali Hashim M, Sahu JN, and Sen Gupta B
- Subjects
- Flocculation, Recycling, Alum Compounds chemistry, Biopolymers chemistry, Industrial Waste, Paper, Polysaccharides chemistry
- Abstract
Recovery of cellulose fibres from paper mill effluent has been studied using common polysaccharides or biopolymers such as Guar gum, Xanthan gum and Locust bean gum as flocculent. Guar gum is commonly used in sizing paper and routinely used in paper making. The results have been compared with the performance of alum, which is a common coagulant and a key ingredient of the paper industry. Guar gum recovered about 3.86mg/L of fibre and was most effective among the biopolymers. Settling velocity distribution curves demonstrated that Guar gum was able to settle the fibres faster than the other biopolymers; however, alum displayed the highest particle removal rate than all the biopolymers at any of the settling velocities. Alum, Guar gum, Xanthan gum and Locust bean gum removed 97.46%, 94.68%, 92.39% and 92.46% turbidity of raw effluent at a settling velocity of 0.5cm/min, respectively. The conditions for obtaining the lowest sludge volume index such as pH, dose and mixing speed were optimised for guar gum which was the most effective among the biopolymers. Response surface methodology was used to design all experiments, and an optimum operational setting was proposed. The test results indicate similar performance of alum and Guar gum in terms of floc settling velocities and sludge volume index. Since Guar gum is a plant derived natural substance, it is environmentally benign and offers a green treatment option to the paper mills for pulp recycling., (Copyright © 2014. Published by Elsevier B.V.)
- Published
- 2014
- Full Text
- View/download PDF
9. Degradation of paper products due to volatile organic compounds.
- Author
-
Alam, Izhar and Sharma, Chhaya
- Subjects
- *
PAPER products , *HEMICELLULOSE , *BIOPOLYMERS , *ACETIC acid , *VOLATILE organic compounds , *WHEAT straw , *CARBONYL group - Abstract
Paper and packaging materials a lignocellulose-based natural biodegradable polymer that spontaneously releases acetic acid, aldehydes, alcohol, and ester-based volatile organic compounds (VOCs) upon ageing and these VOCs start degrading the paper products and decline their mechanical strength properties. The reactivity of the paper of unbleached wheat straw pulp towards acetic acid and hexanal, which has been proven to have more degrading effects on paper than other VOCs, was considered in this work. The papers were exposed to these volatile compounds for 90 days in an air-tight vessel under ambient environmental conditions. The results showed that hexanal was more destructive than acetic acid with regards to cellulose degradation and depletion in the mechanical strength properties. The paper properties like, tensile, tear and burst index, viscosity, pH and carbonyl group content was measured. The growth of the carbonyl group, evidence of the ageing effects in the paper, detected more in the paper exposed to acetic acid. However, the strength of paper properties declined more with hexanal. FE-SEM analysis of the sample showed the development of pores and damage of cellulose fibre upon ageing. Similarly, the damaging effects of VOCs on cellulose, hemicelluloses and lignin were confirmed by significantly reduced peak detection through FT-IR \analysis. The high crystallinity index of the paper products due to exposure to VOCs was detected by XRD analysis, which confirmed the degradation of the low molecular weight cellulose molecule. Thus, the results are strongly recommended that VOCs that generates due to natural or artificial ageing could be the leading cause of paper degradation. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
10. Waste Paper as a Valuable Resource: An Overview of Recent Trends in the Polymeric Composites Field.
- Author
-
de Oliveira, Daniel Magalhães, de Bomfim, Anne Shayene Campos, Benini, Kelly Cristina Coelho de Carvalho, Cioffi, Maria Odila Hilário, Voorwald, Herman Jacobus Cornelis, and Rodrigue, Denis
- Subjects
- *
WASTE paper , *POLYMERIC composites , *LIFE cycles (Biology) , *POLYLACTIC acid , *BIOPOLYMERS , *PAPER recycling - Abstract
This review focuses on polymeric waste-paper composites, including state-of-the-art analysis with quantitative and qualitative discussions. Waste paper is a valuable cellulose-rich material, produced mainly from office paper, newspaper, and paper sludge, which can be recycled and returned to paper production or used in a new life cycle. A systematic literature review found 75 publications on this material over the last 27 years, with half of those published during the last five years. These data represent an increasing trend in the number of publications and citations that have shown an interest in this field. Most of them investigated the physicomechanical properties of composites using different contents of raw waste paper or the treated, modified, and cellulose-extracted types. The results show that polyethylene and polypropylene are the most used matrices, but polylactic acid, a biodegradable/sourced polymer, has the most citations. The scientific relevance of waste-paper composites as a subject includes the increasing trend of the number of publications and citations over the years, as well as the gaps identified by keyword mapping and the qualitative discussion of the papers. Therefore, biopolymers and biobased polymers could be investigated more, as well as novel applications. The environmental impact in terms of stability and degradation should also receive more attention regarding sustainability and life cycle analyses. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
11. Advancing Food Preservation: Sustainable Green-AgNPs Bionanocomposites in Paper-Starch Flexible Packaging for Prolonged Shelf Life.
- Author
-
Trotta, Federico, Da Silva, Sidonio, Massironi, Alessio, Mirpoor, Seyedeh Fatemeh, Lignou, Stella, Ghawi, Sameer Khalil, and Charalampopoulos, Dimitris
- Subjects
- *
FOOD preservation , *FLEXIBLE packaging , *FOOD packaging , *ESCHERICHIA coli , *FOOD waste , *CORNSTARCH - Abstract
In the pursuit of enhancing food packaging, nanotechnology, particularly green silver nanoparticles (G-AgNPs), have gained prominence for its remarkable antimicrobial properties with high potential for food shelf-life extension. Our study aims to develop corn starch-based coating materials reinforced with G-AgNPs. The mechanical properties were examined using a uniaxial tensile tester, revealing that starch coated with the highest G-AgNPs concentration (12.75 ppm) exhibited UTS of 87.6 MPa compared to 48.48 MPa of control paper, a significant (p < 0.02) 65% increase. The assessment of the WVP showcased a statistical reduction in permeability by up to 8% with the incorporation of the hydrophobic layer. Furthermore, antibacterial properties were assessed following ISO 22196:2011, demonstrating a strong and concentration-dependent activity of G-AgNPs against E. coli. All samples successfully disintegrated in both simulated environments (soil and seawater), including samples presenting G-AgNPs. In the food trial analysis, the presence of starch and G-AgNPs significantly reduced weight loss after 6 days, with cherry tomatoes decreasing by 8.59% and green grapes by 6.77% only. The results of this study contribute to the advancement of environmentally friendly packaging materials, aligning with the UN sustainable development goals of reducing food waste and promoting sustainability. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
12. Development and Characterization of Thermoformed Bilayer Trays of Paper and Renewable Succinic Acid Derived Biopolyester Blends and Their Application to Preserve Fresh Pasta
- Author
-
Eva Hernández-García, Marta Pacheco-Romeralo, Pedro Zomeño, Gianluca Viscusi, Francesca Malvano, Giuliana Gorrasi, and Sergio Torres-Giner
- Subjects
paper ,biopolymers ,thermoforming ,food preservation ,migration ,Technology ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Microscopy ,QH201-278.5 ,Descriptive and experimental mechanics ,QC120-168.85 - Abstract
The present study reports on the development by thermoforming of highly sustainable trays based on a bilayer structure composed of paper substrate and a film made of a blend of partially bio-based poly(butylene succinate) (PBS) and poly(butylene succinate-co-adipate) (PBSA). The incorporation of the renewable succinic acid derived biopolyester blend film slightly improved the thermal resistance and tensile strength of paper, whereas its flexural ductility and puncture resistance were notably enhanced. Furthermore, in terms of barrier properties, the incorporation of this biopolymer blend film reduced the water and aroma vapor permeances of paper by two orders of magnitude, while it endowed the paper structure with intermediate oxygen barrier properties. The resultant thermoformed bilayer trays were, thereafter, originally applied to preserve non-thermally treated Italian artisanal fresh pasta, “fusilli calabresi” type, which was stored under refrigeration conditions for 3 weeks. Shelf-life evaluation showed that the application of the PBS–PBSA film on the paper substrate delayed color changes and mold growth for 1 week, as well as reduced drying of fresh pasta, resulting in acceptable physicochemical quality parameters within 9 days of storage. Lastly, overall migration studies performed with two food simulants demonstrated that the newly developed paper/PBS–PBSA trays are safe since these successfully comply with current legislation on plastic materials and articles intended to come into contact with food.
- Published
- 2023
- Full Text
- View/download PDF
13. Comment on the paper "Network and Nakamura tridiagonal computational simulation of electrically-conducting biopolymer micro-morphic transport phenomena O. Anwar Bég, J. Zueco, M. Norouzi, M. Davoodi, A. A. Joneidi, Assma F. Elsayed, Computers in Biology and Medicine 44 (2014) 44-56".
- Author
-
Pantokratoras A
- Subjects
- Computational Biology, Computers, Electricity, Humans, Biopolymers, Morphine
- Abstract
The present comment concerns some doubtful results included in the above paper., (Copyright © 2017 Elsevier Ltd. All rights reserved.)
- Published
- 2017
- Full Text
- View/download PDF
14. Advancing Paper Industry Applications with Extruded Cationic Wheat Starch as an Environmentally Friendly Biopolymer.
- Author
-
Tara, Ahmed
- Subjects
- *
WHEAT starch , *REACTIVE extrusion , *INTRINSIC viscosity , *PAPER industry , *BIOPOLYMERS , *MECHANICAL energy , *MANUFACTURING processes - Abstract
Within the domain of starch modification, the study delved into cationization of wheat starch through a laboratory-scale twin-screw extruder, exploring various processing conditions. Cationic starch, a crucial component for enhancing paper attributes like dry strength and printability, took center stage. The focus shifted towards integration into papermaking, investigating the transformative potential of reactive extrusion. By contrasting it with conventional dry-process methodology, innovative strides were unveiled. The study extended to pilot-scale extrusion, bridging the gap between laboratory experimentation and potential industrial implementation. Infused with scientific rigor, the investigation navigated the benefits brought about by reactive extrusion. Empirical insights highlighted a significant reduction in the intrinsic viscosity of extruded starch, decreasing from 170 mL·g−1 (native starch) to 100 mL·g−1 at a specific mechanical energy (SME) input of 800 kWh·t−1, demonstrating remarkable stability despite increased mechanical treatment. Moreover, beyond the critical threshold of 220 kWh·t−1, retention efficiency reached a stable plateau at 78%. The study revealed that utilizing a larger extruder slightly improved the mechanical properties of the paper, emphasizing the advantage of scaling up the production process and the consistency of results across different extruder sizes. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
15. Cellular biopolymers and molecular structure of a secondary pulp and paper mill sludge verified by spectroscopy and chemical extraction techniques.
- Author
-
Edalatmanesh M, Sain M, and Liss SN
- Subjects
- Paper, Sewage, Biopolymers chemistry, Chemical Fractionation methods, Industrial Waste analysis, Spectroscopy, Fourier Transform Infrared
- Abstract
For proper treatment, recycling, or disposal of the pulp and paper mill secondary sludge qualitative and quantitative determination of its characteristics are necessary. Chemical extraction, quantitative characterization, and spectroscopic experiments have been performed to determine the molecular composition and chemical functionality of a pulp and paper mill secondary sludge. In order to extract the low-molecular-weight substances, soxhlet extraction with polar and non-polar solvents was performed where most of the target substances (17±1.3%.) were extracted after 2 hours. Over time, this extraction followed a first-order kinetics. Fiber analyses have shown 12±3% lignin, 28±3% cellulose, and 12±4% hemicelluloses content. The ash content was about 17±0.5%. In this work, 7 and 16% intra- and extracellular polymeric substances, respectively, were extracted from the secondary sludge. EPS and mixture of intra- and extracellular biopolymers have shown similar chemical functionalities. These analyses confirmed that the paper secondary sludge consisted mainly of wood fiber, i.e. lignocellulosic substances, along with proteins and polysaccharides originated from microorganisms.
- Published
- 2010
- Full Text
- View/download PDF
16. Biopolymers based paper coating with promoted grease resistivity, bio-degradable and mechanical properties.
- Author
-
Wenelska, Karolina, Kędzierski, Tomasz, Maslana, Klaudia, Sielicki, Krzysztof, Dymerska, Anna, Janusz, Joanna, Marianczyk, Grzegorz, Gorgon-Kuza, Aleksandra, Bogdan, Wojciech, and Mijowska, Ewa
- Subjects
SODIUM alginate ,BIODEGRADABLE plastics ,PLASTICS in packaging ,PROTECTIVE coatings ,SURFACE coatings ,BIOPOLYMERS ,PACKAGING industry ,TRANSPORTATION costs - Abstract
The dominance of plastics in the packaging market is due to their low weight and thickness, which save transportation costs. However, their non-biodegradability poses a significant threat to the environment. Paper, on the other hand, is considered as a safer alternative due to its natural composition and biodegradability. The porous structure of paper limits its application in packaging, and its poor water resistance further restricts its use in humid environments. Therefore, lamination is a method useful tool to improve the barrier properties of paper. Additionally, the researchers are focusing on developing biodegradable and water-based coatings with anti-fat properties as a green alternative to plastic packaging. The impact of a new grease-resistant coating composed of starch, gelatin and sodium alginate on the mechanical properties of paper was investigated through tensile, tearing, and bursting strength tests. The results showed significant improvements in the mechanical properties of the coated paper sheets. Furthermore, the biodegradability test indicated that the paper samples coated with the new composition showed a 50% weight loss after one week of incubation in the soil, and after three weeks, they exhibited 100% weight loss, demonstrating their outstanding biodegradability. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
17. Extraction and Silylation of Cellulose Nanofibers from Agricultural Bamboo Leaf Waste for Hydrophobic Coating on Paper
- Author
-
Kamonwan Pacaphol, Kanogwan Seraypheap, and Duangdao Aht-Ong
- Subjects
bamboo leaves ,biopolymers ,nanocellulose ,silanes ,surface coating ,hydrophobicity ,Science ,Textile bleaching, dyeing, printing, etc. ,TP890-933 - Abstract
Bamboo leaves are a resource of cellulose fibers that can be further developed into value-added products. In this research, cellulose nanofibers were obtained from Tinwa bamboo leaves, and then chemically modified with (i) hexadecyltrimethoxysilane (HDTMS) and (ii) perfluorooctyltriethoxysilane (POTS). The modified nanofibers were then used as a hydrophobic biopolymer coating on paper, as an alternative to commonly used fossil-based coatings. Hydrophobicity in terms of surface and bulk properties of the coated paperboards was investigated. The results showed that the hydrophobic coatings obtained provided a high contact angle up to 141° and a decrease of water penetration speed during immersion up to 94% when using ultrasonic technique. The coated paperboards exhibited color difference values compared with an uncoated paperboard in the range of 0.4 to
- Published
- 2023
- Full Text
- View/download PDF
18. Engineered Carbon Nanotube Buckypaper: A Platform for Electrochemical Biosensors.
- Author
-
Chatterjee J, Cardenal J, and Shellikeri A
- Subjects
- Biopolymers chemistry, Electrodes, Equipment Design, Equipment Failure Analysis, Gold chemistry, Metal Nanoparticles ultrastructure, Nanotubes, Carbon ultrastructure, Biopolymers analysis, Biosensing Techniques instrumentation, Conductometry instrumentation, Metal Nanoparticles chemistry, Nanotubes, Carbon chemistry, Paper
- Abstract
Much recent research has focused on electrochemical biosensors to meet the growing demands for rapid and accurate diagnostic tests for diseases, detecting toxic molecules present in the environment, and biomolecules used as in pharmaceuticals. Carbon nanotubes (CNTs) have been shown to be effective for electrochemical biosensors because of their favorable chemical, physical and electrical properties. Here we report the use of a two-dimensional entangled mat of CNTs, known as buckypaper, as electrodes for electrochemical biosensors. The buckypaper electrodes exhibit superior sensitivity towards tryptophan, L-carnitine, tyrosine and myoglobin. When engineered with metals or other specific molecules, the buckypaper shows an up to 1000-fold increase in the signal compared with electrodes based on glassy carbon. This enhanced electrochemical performance of the modified buckypaper demonstrates potential for a new platform for electrochemical biosensor technologies.
- Published
- 2015
- Full Text
- View/download PDF
19. High hydrophobic silanized paper: Material characterization and its biodegradation through brown rot fungus.
- Author
-
Perdoch, Waldemar, Mazela, Bartłomiej, Tavakoli, Mehrnoosh, and Treu, Andreas
- Subjects
- *
WASTE products management , *BROWN rot , *BIOPOLYMERS , *MATERIAL biodegradation , *WASTE paper , *PACKAGING waste , *PACKAGING materials , *WOOD preservatives - Abstract
• Achieving high waterproofing in modified cellulose sheets using silylated starch. • Accelerating to biodegradation rate of starch-modified cellulose material by water. • Increasing service life and decay acceleration by fungi for modified paper. Modifying natural polymers with silicones gives new possibilities for packaging products and waste management. In this study, the innovative papers produced were altered following the reaction of polysaccharides and organosilicon compounds. The susceptibility of the studied material to biodegradation caused by a brown-rot fungus was assessed. Strength properties by tensile strength and dynamic mechanical analysis and hydrophobic properties by water uptake test and water contact angle analysis were evaluated. Moreover, elemental analysis by ICP method was controlled. The durability against fungi and the hydrophobic properties were increased by the modification. The fungal decay resistance of the silanized paper was reduced by water storage, which allows for managing paper waste. Cellulose-based paper treated with starch-modified methyltrimethoxysilane showed potential as a packaging material due to its reduced water uptake. Possible application areas could be corrugated boxes, cellulose thermoformed products for electronics, and food packaging. However, the water-repellent effect is limited to short-term exposure in humid conditions. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
20. Polycaprolactone/Starch/Agar Coatings for Food-Packaging Paper: Statistical Correlation of the Formulations’ Effect on Diffusion, Grease Resistance, and Mechanical Properties
- Author
-
Emanuela Lo Faro, Angela Bonofiglio, Silvia Barbi, Monia Montorsi, and Patrizia Fava
- Subjects
biopolymers ,food wrapping ,design of experiments ,Organic chemistry ,QD241-441 - Abstract
Paper is one of the most promising materials for food packaging and wrapping due to its low environmental impact, but surface treatments are often needed to improve its performance, e.g., the resistance to fats and oils. In this context, this research is focused on the formulation of a new paper bio-coating. Paper was coated with liquids containing poly(hexano-6-lactone) (PCL), glycerol and variable percentages of starch (5–10% w/w PCL dry weight), agar-agar (0–1.5% w/w PCL dry weight), and polyethylene glycol (PEG) (5% or 15% w/w PCL dry weight) to improve coating uniformity and diffusion. A design of experiments approach was implemented to find statistically reliable results in terms of the best coating formulation. Coated paper was characterized through mechanical and physical properties. Results showed that agar content (1.5% w/w PCL dry weight) has a beneficial effect on increasing the resistance to oil. Furthermore, the best coating composition has been calculated, and it is 10% w/w PCL dry weight of starch, 1.5% w/w PCL dry weight of agar, and 15% w/w PCL dry weight of PEG.
- Published
- 2023
- Full Text
- View/download PDF
21. Paper Waste Recycling. Circular Economy Aspects.
- Author
-
Ozola, Zanda U., Vesere, Rudite, Kalnins, Silvija N., and Blumberga, Dagnija
- Subjects
PAPER recycling ,CELLULOSE nanocrystals ,ETHANOL as fuel ,PACKAGING recycling ,BIOPOLYMERS ,SUGARS ,HYDROGEN - Abstract
Paper waste is a raw material for a lot of products with different added value. The engineering, economic and environmental aspects of paper waste recycling are analysed for production of composite material, cellulose nanofibers and nanocrystals, bricks with paper components, porous carbon, film of biopolymer, enzymatic sugar and bioenergy: bioethanol, hydrogen and biofuel. Through multicriteria analysis, it was possible to determine the most feasible paper waste recycling product in case of four product groups: egg packaging boxes, cardboard, reused paper, cellulose nanomaterials (nanofibers and nanocrystals). The production of cellulose nanofibres and cellulose nanocrystals has an advantage over egg packaging and cardboard production as well as reusable paper. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
22. Development and Characterization of Thermoformed Bilayer Trays of Paper and Renewable Succinic Acid Derived Biopolyester Blends and Their Application to Preserve Fresh Pasta.
- Author
-
Hernández-García, Eva, Pacheco-Romeralo, Marta, Zomeño, Pedro, Viscusi, Gianluca, Malvano, Francesca, Gorrasi, Giuliana, and Torres-Giner, Sergio
- Subjects
SUCCINIC acid ,POLYBUTENES ,TRAYS ,PLASTICS ,PASTA ,THERMAL resistance - Abstract
The present study reports on the development by thermoforming of highly sustainable trays based on a bilayer structure composed of paper substrate and a film made of a blend of partially bio-based poly(butylene succinate) (PBS) and poly(butylene succinate-co-adipate) (PBSA). The incorporation of the renewable succinic acid derived biopolyester blend film slightly improved the thermal resistance and tensile strength of paper, whereas its flexural ductility and puncture resistance were notably enhanced. Furthermore, in terms of barrier properties, the incorporation of this biopolymer blend film reduced the water and aroma vapor permeances of paper by two orders of magnitude, while it endowed the paper structure with intermediate oxygen barrier properties. The resultant thermoformed bilayer trays were, thereafter, originally applied to preserve non-thermally treated Italian artisanal fresh pasta, "fusilli calabresi" type, which was stored under refrigeration conditions for 3 weeks. Shelf-life evaluation showed that the application of the PBS–PBSA film on the paper substrate delayed color changes and mold growth for 1 week, as well as reduced drying of fresh pasta, resulting in acceptable physicochemical quality parameters within 9 days of storage. Lastly, overall migration studies performed with two food simulants demonstrated that the newly developed paper/PBS–PBSA trays are safe since these successfully comply with current legislation on plastic materials and articles intended to come into contact with food. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
23. The Effect of Chitosan Into Paper Properties in Papermaking.
- Author
-
Muryeti, Pratiwi, Faraqh Eka, Yuniastuti, Risqi Tri, and Budimulyani, Estuti
- Subjects
CHITOSAN ,PAPERMAKING ,BIOPOLYMERS ,BIODEGRADABLE materials ,TENSILE strength - Abstract
Chitosan is natural polymer that has nontoxic, biodegradable and biocompatibility material. Chitosan has been investigated as papermaking additive to improve properties of paper such as physical and optical properties. The objective of the research was to investigate the effectiveness chitosan in papermaking process and to determine the effect of chitosan on properties of paper. Chitosan was added in papermaking process with different dosage 0.5, 1, 1.5, and 2%. The efficiencies of Chitosan in papermaking can be obtained by measuring and analyzing of properties of paper, such as physical and optical properties. The increasing dosage of chitosan, will increase the physical properties of paper, such as tensile strength and decrease water absorption of paper, but will not influence the brightness of paper. The optimum concentration of chitosan used in paper in this study is 1.5%. The result shows that chitosan used in paper can improve the properties of paper. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
24. Polycaprolactone/Starch/Agar Coatings for Food-Packaging Paper: Statistical Correlation of the Formulations' Effect on Diffusion, Grease Resistance, and Mechanical Properties.
- Author
-
Lo Faro, Emanuela, Bonofiglio, Angela, Barbi, Silvia, Montorsi, Monia, and Fava, Patrizia
- Subjects
- *
STATISTICAL correlation , *STARCH , *POLYCAPROLACTONE , *AGAR , *PROTECTIVE coatings , *DIFFUSION coatings , *PACKAGING materials - Abstract
Paper is one of the most promising materials for food packaging and wrapping due to its low environmental impact, but surface treatments are often needed to improve its performance, e.g., the resistance to fats and oils. In this context, this research is focused on the formulation of a new paper bio-coating. Paper was coated with liquids containing poly(hexano-6-lactone) (PCL), glycerol and variable percentages of starch (5–10% w/w PCL dry weight), agar-agar (0–1.5% w/w PCL dry weight), and polyethylene glycol (PEG) (5% or 15% w/w PCL dry weight) to improve coating uniformity and diffusion. A design of experiments approach was implemented to find statistically reliable results in terms of the best coating formulation. Coated paper was characterized through mechanical and physical properties. Results showed that agar content (1.5% w/w PCL dry weight) has a beneficial effect on increasing the resistance to oil. Furthermore, the best coating composition has been calculated, and it is 10% w/w PCL dry weight of starch, 1.5% w/w PCL dry weight of agar, and 15% w/w PCL dry weight of PEG. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
25. Extensive Characterization of Alginate, Chitosan and Microfibrillated Cellulose Cast Films to Assess their Suitability as Barrier Coating for Paper and Board.
- Author
-
Mayrhofer, Anna, Kopacic, Samir, and Bauer, Wolfgang
- Subjects
- *
CARDBOARD , *ALGINIC acid , *CELLULOSE , *CHITOSAN , *COATING processes , *SURFACE tension , *ALGINATES , *BIOPOLYMERS , *EDIBLE coatings - Abstract
The vast amount of synthetic polymers used in packaging is putting a strain on the environment and is depleting finite, non-renewable raw materials. Abundantly available biopolymers such as alginate, chitosan and microfibrillated cellulose (MFC) have frequently been suggested in the literature to replace synthetic polymers and their barrier properties have been investigated in detail. Many studies aim to improve the properties of standalone biopolymer films. Some studies apply these biopolymers as barrier coatings on paper, but the solids content in most of these studies is quite low, which in turn would result in a high energy demand in industrial drying processes. The aim of this study is to suggest a laboratory procedure to investigate the suitability of these biopolymers at higher and such more industrially relevant solids content as potential coating materials for paper and board in order to improve their barrier properties. First, biopolymer solutions are prepared at a high solids content at which the viscosity at industrially relevant higher shear rates of 50,000 s−1 (1000 s−1 for MFC) is in the same range as a synthetic reference material (in this case ethylene vinyl alcohol EVOH) at 10 wt%. These solutions are analyzed regarding properties such as rheology and surface tension that are relevant for their coatability in industrial coating processes. Then, free-standing films are cast, and the films are characterized regarding important properties for packaging applications such as different surface, mechanical and barrier properties. Based on these results suitable biopolymers for future coating trials can be easily identified. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
26. A novel method for fabrication of paper-based microfluidic devices using BSA-ink.
- Author
-
Walia, Sunil, Bhatnagar, Ira, Liu, Juewen, Mitra, Sushanta K., and Asthana, Amit
- Subjects
- *
SERUM albumin , *BIOPOLYMERS , *FILTER paper , *MICROFLUIDIC devices , *AQUEOUS solutions , *DETECTION limit - Abstract
This paper describes the fabrication of paper-based microfluidic devices using a novel, inexpensive ink composed of bovine serum albumin (BSA), utilizing BSA's thermal denaturation and aggregation to create a hydrophobic barrier on Whatman® Grade 4 filter paper. A 20% aqueous solution of BSA was inked onto the paper using a pen plotter at moderate speed (5 cm/s) with desired shape and size followed by heating at 80 °C to denature the BSA leading to hydrophobic barriers formation, whereas below 80 °C the barrier layer is prone to collapse. The minimum line gap and line width of ~1 mm and ~1.3 mm were achieved. Finally, a proof-of-concept glucose sensing was shown while addressing the issue of the coffee ring effect using the biopolymer NanoCheck-ATH® from ChitoLytic Inc. The glucose concentration limit of detection (LOD) as low as 0.2 mg/mL was estimated. The developed technique offers ease of fabrication, high reproducibility, cost-effectiveness, and is environmentally friendly. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
27. Biopolymer-based coatings containing active ingredients for cellulosic packaging: A review
- Author
-
de Lima Santos, Kamila, Moraes, Gustavo Henrique, Nolêtto, Ana Paula Reis, and do Amaral Sobral, Paulo José
- Published
- 2024
- Full Text
- View/download PDF
28. The Properties Of Food Packaging Paper From Oil Palm Empty Fruit Bunches Pulp Coated with Chitosan.
- Author
-
Prasetiyo, Kurnia Wiji, Zulfiana, Deni, Anita, Sita Heris, Fatriasari, Widya, Suryanegara, Lisman, Masruchin, Nanang, and Gutari, Sesmi
- Subjects
OIL palm ,FOOD packaging ,CHITOSAN ,EDIBLE coatings ,BIOPOLYMERS ,PACKAGED foods - Abstract
The coating process on food packaging paper is carried out to improve the food safety aspect from dangerous substance migration from food packaging into food. It can facilitate to increase its function and wide the potency of utilization. The coating materials commonly used are plastic and wax coatings. Chitosan as a natural polymer that has the binding properties both water and oil. Chitosan has polar and non-polar groups thus it is potential to be developed as a coating material for food packaging paper. The purpose of this study was to determine the physical-mechanical and antimicrobial properties of food packaging paper from oil palm empty fruit bunches pulp coated with chitosan. The parameters used were chitosan and pulp weight. The oil palm empty fruit bunch pulp was fibrillated with high speed blender then mixed with chitosan solution. The mixed solution was poured in the mold and dried in an oven at 60°C for 24 hours. The results showed that increasing of chitosan content was coated paper increased physical and mechanical properties values. The more pulp content the higher the physical properties value, however the mechanical properties value tend to decrease. The antimicrobial activity of chitosan coated paper was evaluated by measuring the diameter of the inhibition zones. The results revealed that all tested samples showed growth inhibition zone againts to Escherichia coli and Staphylococcus aureus after 24 h incubation compared to commercial food packaging paper. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
29. The effect of paper coatings containing biopolymer binder and different natural pigments on printability.
- Author
-
Arman Kandirmaz, Emine, Ozcan, Arif, and Ural, Elif
- Subjects
SURFACE coatings ,BIOPOLYMERS ,PRINTING properties of paper ,XANTHAN gum ,BARITE - Published
- 2021
- Full Text
- View/download PDF
30. Fabrication of Paper Sheets Coatings Based on Chitosan/Bacterial Nanocellulose/ZnO with Enhanced Antibacterial and Mechanical Properties
- Author
-
Joanna Jabłońska, Magdalena Onyszko, Maciej Konopacki, Adrian Augustyniak, Rafał Rakoczy, and Ewa Mijowska
- Subjects
biopolymers ,paper packaging ,antimicrobial activity ,nanoparticles ,Biology (General) ,QH301-705.5 ,Chemistry ,QD1-999 - Abstract
Here, we designed paper sheets coated with chitosan, bacterial cellulose (nanofibers), and ZnO with boosted antibacterial and mechanical activity. We investigated the compositions, with ZnO exhibiting two different sizes/shapes: (1) rods and (2) irregular sphere-like particles. The proposed processing of bacterial cellulose resulted in the formation of nanofibers. Antimicrobial behavior was tested using E. coli ATCC® 25922™ following the ASTM E2149-13a standard. The mechanical properties of the paper sheets were measured by comparing tearing resistance, tensile strength, and bursting strength according to the ISO 5270 standard. The results showed an increased antibacterial response (assigned to the combination of chitosan and ZnO, independent of its shape and size) and boosted mechanical properties. Therefore, the proposed composition is an interesting multifunctional mixture for coatings in food packaging applications.
- Published
- 2021
- Full Text
- View/download PDF
31. Hydrogels and Hydrocolloids-Alginates and other Biopolymers. Papers from the 7th World Biomaterials Congress, May 17-21, 2004, Sydney, Australia.
- Subjects
- Alginates, Biocompatible Materials, Biopolymers, Colloids, Hydrogels
- Published
- 2005
- Full Text
- View/download PDF
32. Efficacy of natural polymer leather sheet with papermill sludge and leather waste: a novel recycling perspective.
- Author
-
Senthil, Rethinam, Kavukcu, Serdar Batıkan, Sinem, Çakır, and Tunçay, Karaer Aslıhan
- Subjects
WASTE recycling ,LEATHER ,BIOPOLYMERS ,DUST ,LEATHER goods ,RUBBER ,LEATHER industry ,PAPER recycling - Abstract
The leather sector is currently under heavy threat to reduce environmental pollution problems associated with the generation of leather waste, especially in terms of public acceptance issues related to environmental welfare requirements. Leather waste must be disposed of in landfills, which has a significant environmental impact. The development of natural polymer/paper mill sludge-based leather replacements for the production of leather goods and footwear products is an alternative solution supported by the recycled leather industry. In this work, a study is carried out to prepare natural polymer leather sheet (NPLS) from leather waste (chrome shavings and buffing dust), paper mill sludge, and natural polymer [natural rubber latex (NRL)] by vacuum-pressure method, for their potential application in leather products industries. The NPLS was characterized by its physicochemical and mechanical properties. Various types of NPLS were produced by comprising different ratios of the NRL. Results portrayed that 300 mL w/v NRL significantly improved the physicochemical and mechanical properties of NPLS. Hence, the research has revealed a revolutionary idea of NPLS developed which is cost-effective, eco-friendly, and energy efficient. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
33. Influence of Wet Film Thickness on the Functional Applications of Biopolymers in Paper Conservation.
- Author
-
Aleksić, Gabriela, Cigula, Tomislav, Vukoje, Marina, and Itrić Ivanda, Katarina
- Subjects
BIOPOLYMERS ,SILVER nanoparticles ,FOOD industry ,COLLOIDS ,RHEOLOGY - Abstract
In heritage conservation, paper deterioration can be slowed down by controlling the environmental conditions surrounding heritage objects and stabilizing the materials these objects are made of. As conservation materials can also cause optical, chemical, and physical changes in the object, their application should be safe, minimalistic, and purposeful. This paper aimed to observe the functional applications of three biopolymers used in paper conservation. For that purpose, a model paper was coated with methylcellulose (MC), cellulose nanocrystals (CNCs), and wheat starch (WSP) using different wet film deposits. The prepared samples were characterized by determining their physical, optical, and surface properties. The results show that changes in the wet film deposit thickness influenced paper properties. With CNCs, the increase has caused a drastic change of colour properties, with MC hydrophobicity increased and with WSP grammage and thickness increased. All coatings (except CNC24) have contributed to the preservation of the colour properties of the paper from the damage caused by thermal ageing. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
34. Effects of cellulose nanofibrils and starch compared with polyacrylamide on fundamental properties of pulp and paper
- Author
-
Hossein Jalali Torshizi, Milad Tajik, Hossein Resalati, and Yahya Hamzeh
- Subjects
Paper ,Chemical Phenomena ,Starch ,Polyacrylamide ,Acrylic Resins ,Nanofibers ,Bagasse pulp ,engineering.material ,Biochemistry ,chemistry.chemical_compound ,Biopolymers ,stomatognathic system ,Structural Biology ,Nano ,Cellulose ,Molecular Biology ,Mechanical Phenomena ,chemistry.chemical_classification ,Pulp (paper) ,Cationic polymerization ,General Medicine ,Polymer ,Chemical engineering ,chemistry ,engineering - Abstract
Bio-based additives received significant attention in pulp and paper properties improvement. For this, the most cited biochemical Cellulose Nano Fibrils (CNFs) and Cationic Starch (CS) were experimentally compared with the most declared synthetic chemical, Cationic Polyacrylamide (CPAM). SEM images showed better paper surface filling by the utilization of the chemicals. The three studied polymers, in solely or combination mechanism, improved mainly bagasse pulp and paper properties compared to the blank sample, except for pulp drainage, which decreased by CNFs to lower volumes presumably due to its intrinsic characteristics. Cationic polymers (CP) compared to CP/CNFs approaches increased pulp retention and drainage but decreased paper density and strengths. The best pulp retention and drainage achieved by CS followed by CPAM, while paper air persistency, density, and strength properties evaluated highest by CP/CNFs followed by CNFs. Generally, CS revealed a more significant improvement in pulp and paper properties than CPAM either with or without CNFs.
- Published
- 2021
35. Coating Color Rheology and Coated Paper Properties Using Nano-biopolymer as Binder
- Author
-
Appita Conference and Exhibition (64th : 2010 : Melbourne, Vic.), Srikanth, N, and Nazhad, Mousa M
- Published
- 2010
36. Biopolymers for surface engineering of paper-based products
- Author
-
Shen, Jing, Fatehi, Pedram, and Ni, Yonghao
- Published
- 2014
- Full Text
- View/download PDF
37. Paper-Based Biosensors for COVID-19: A Review of Innovative Tools for Controlling the Pandemic
- Author
-
Ana P.M. Tavares, Cristina E. A. Sousa, Rodrigo Martins, Maria Teresa Cruz, Ana C. Marques, Elvira Fortunato, Felismina T.C. Moreira, M. Goreti F. Sales, A. Rita Cardoso, Tomás Pinheiro, Ana Matos, and Universidade do Minho
- Subjects
Diagnostic methods ,Coronavirus disease 2019 (COVID-19) ,Computer science ,General Chemical Engineering ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,Immunology ,02 engineering and technology ,Viral antigen ,Peptides and proteins ,Diagnostic tools ,01 natural sciences ,Biopolymers ,Pandemic ,Medical diagnosis ,Antigens ,QD1-999 ,Science & Technology ,SARS-CoV-2 ,010401 analytical chemistry ,General Chemistry ,Paper based ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,3. Good health ,Chemistry ,Risk analysis (engineering) ,Perspective ,0210 nano-technology - Abstract
The appearance and quick spread of the new severe acute respiratory syndrome coronavirus disease, COVID-19, brought major societal challenges. Importantly, suitable medical diagnosis procedures and smooth clinical management of the disease are an emergent need, which must be anchored on novel diagnostic methods and devices. Novel molecular diagnostic tools relying on nucleic acid amplification testing have emerged globally and are the current gold standard in COVID-19 diagnosis. However, the need for widespread testing methodologies for fast, effective testing in multiple epidemiological scenarios remains a crucial step in the fight against the COVID-19 pandemic. Biosensors have previously shown the potential for cost-effective and accessible diagnostics, finding applications in settings where conventional, laboratorial techniques may not be readily employed. Paper- and cellulose-based biosensors can be particularly relevant in pandemic times, for the renewability, possibility of mass production with sustainable methodologies, and safe environmental disposal. In this review, paper-based devices and platforms targeting SARS-CoV-2 are showcased and discussed, as a means to achieve quick and low-cost PoC diagnosis, including detection methodologies for viral genomic material, viral antigen detection, and serological antibody testing. Devices targeting inflammatory markers relevant for COVID-19 are also discussed, as fast, reliable bedside diagnostic tools for patient treatment and follow-up., The authors acknowledge funding through projects Eco2Covid (POCI-01-02B7-FEDER-068174) and TecniCov (POCI-01-02B7-FEDER-069745), co-funded by FEDER through COMPETE2020 and Lisboa2020. T.P., A.R.C. and A.C.M. acknowledge funding to National Foundation for Science and Technology, I.P., FCT, through their PhD grants, references DFA/BD/8606/2020, SFRH/BD/130107/2017 and SFRH/BD/115173/2016, respectively, info:eu-repo/semantics/publishedVersion
- Published
- 2021
38. Chitosan-coated paper packaging for specialty coffee beans: Coating characterization, bean and beverage analysis.
- Author
-
Amorin-da-Silva, Bruna Casagrande, Zambuzi, Giovana Cristina, Francisco, Kelly Roberta, Verruma-Bernardi, Marta Regina, and Ceccato-Antonini, Sandra Regina
- Subjects
- *
BEVERAGE analysis , *COFFEE beans , *COFFEE grounds , *BEVERAGE flavor & odor , *BIOPOLYMERS , *BAMBARA groundnut - Abstract
[Display omitted] • A chitosan-based coating for paper packaging to store specialty coffee is presented. • Chitosan-based film enhanced the mechanical and permeability properties of paper. • Coffee beverage differs in flavor regarding the two samples of chitosan used as coating in packaging. Cellulose-based packaging has received great attention due to its characteristics of biodegradability, sustainability, and recyclability. Natural polymer coatings are usually applied to the paper surface to enhance the barriers to water vapour and improve the mechanical properties. A chitosan-based coating for paper packaging was developed in this work to store specialty roasted coffee beans, evaluating two samples of chitosan (Sigma® and molasses chitosan), and following the physico-chemical and microbiological characteristics of coffee beans along a period of 60 days. Sensory tests (Ranking Descriptive Analysis and Preference Test) were applied to the beverage prepared with the roasted and ground coffee beans stored in each packaging. Thin chitosan films provided good coverage and adhesion on the paper. Improved mechanical properties and lower water permeability were observed in the chitosan-coated papers. The physicochemical and microbiological characteristics of the coffee beans were not influenced by the packaging along 60 days of storage. The molasses chitosan coating resulted in slightly darker roasted beans. In sensory evaluation, there is a clear difference between the chitosan samples, so that molasses chitosan-coated packaging had higher scores compared to Sigma® chitosan treatment for flavor and global impression in the preference analysis of the beverage. The molasses chitosan-coated packaging had three to four more consumers attributing the highest scores for the beverage prepared with the roasted beans stored in this type of packaging. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
39. Antimicrobial wrapping paper coated with a ternary blend of carbohydrates (alginate, carboxymethyl cellulose, carrageenan) and grapefruit seed extract.
- Author
-
Shankar, Shiv and Rhim, Jong-Whan
- Subjects
- *
WRAPPING paper , *ANTI-infective agents , *CARBOHYDRATES , *GRAPE seed extract , *BIOPOLYMERS - Abstract
A functional biopolymer-coated paper was prepared by coating a ternary blend of the alginate, carboxymethyl cellulose, and carrageenan with grapefruit seed extract (GSE) for the substitute use of synthetic polymer-coated paper. The microstructure of the surface and cross-section of the coated paper analyzed by field emission scanning electron microscope (FE-SEM) indicated that the biopolymer was compatible with the base paper and filled the pores of the porous fiber to make a smooth-surfaced coating paper. The properties of the biopolymer-coated paper, such as water and oil resistance, water vapor barrier, surface hydrophobicity, and mechanical properties, increased significantly compared with not only the base paper but also commercially used PE-coated paper. The blended biopolymer coating material exhibited strong antibacterial activity against food-borne pathogenic bacteria, Listeria monocytogenes and Escherichia coli , which were destroyed completely within 3 and 9 h, respectively. The packaging test for a minced fish cake packed with the biopolymer-coated paper showed the complete destruction of surface inoculated bacteria in 6–9 days. The biopolymer-coated paper showed a high potential for disposable food packaging applications to increase the shelf-life of packaged food. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
40. From the Treatment of Olive Mills Wastewater to Its Valorisation: Towards a Bio-economic Industrial Symbiosis
- Author
-
Mouzakitis, Yannis, Aminalragia-Giamini, Roxani, Adamides, Emmanuel D., Howlett, Robert James, Series editor, Jain, Lakhmi C., Series editor, Campana, Giampaolo, editor, Howlett, Robert J., editor, Setchi, Rossi, editor, and Cimatti, Barbara, editor
- Published
- 2017
- Full Text
- View/download PDF
41. Fabrication of oil‐ and water‐resistant paper without creating microplastics on disposal.
- Author
-
Kansal, Dhwani and Rabnawaz, Muhammad
- Subjects
NUCLEAR magnetic resonance spectroscopy ,SUNFLOWER seed oil ,CONTACT angle - Abstract
The proliferation of microplastics in the ocean and other water bodies is becoming an alarming issue. The development of plastic‐free water‐ and oil‐resistant paper can contribute toward mitigating this problem. Herein we report a plastic‐free paper coating derived from chitosan and sunflower oil. Chitosan grafted sunflower oil paper coatings were prepared via the ring opening of the partially epoxidized sunflower oil with chitosan. The product of these reactions was characterized by nuclear magnetic resonance and infrared spectroscopy techniques. The sunflower oil grafted chitosan solution was coated onto a Kraft paper. The Cobb 60 and kit rating values were determined to be 8.00 g/m2 and 7.66, respectively, for the optimal formulations. Meanwhile, the water contact angle was found to be 94.0 ± 1.6° after 30 s. Scanning electron microscopy analysis was employed to gain insight regarding the changes that occurred on the paper surface at the microscopic level. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
42. Conversion of paper and xylan into laser-induced graphene for environmentally friendly sensors
- Author
-
Bohdan Kulyk, Marina Matos, Beatriz F.R. Silva, Alexandre F. Carvalho, António J.S. Fernandes, Dmitry V. Evtuguin, Elvira Fortunato, and Florinda M. Costa
- Subjects
Paper ,Xylan ,Biopolymers ,Sensors ,Mechanical Engineering ,LIG ,Materials Chemistry ,Laser ,General Chemistry ,Electrical and Electronic Engineering ,Graphene ,Electronic, Optical and Magnetic Materials - Abstract
Laser-induced graphene (LIG) is a foam-like porous material consisting of few-layer graphene obtained by laser irradiation of a wide range of carbon-containing substrates. Among these, the ability to synthesize LIG from paper and other cellulose-related materials is particularly exciting, as it opens the door to a wide assortment of potential applications in the form of low-cost, flexible, and biodegradable devices. Here, the synthesis of this material, dubbed paper-LIG, on different types of filter papers and xylan biopolymer is discussed. In particular, we report the formation of paper-LIG by single-step irradiation, providing an improvement over the conventional multiple lasing approach and giving an explanation of the conditions that allow this simplified synthesis. All the relevant process parameters are covered, assessing their effect on the resulting electrical properties, structure, and morphology. Additionally, we demonstrate the application of LIG obtained from xylan, an abundant and often underutilized biopolymer, for temperature sensing. These results provide a better understanding of the conditions required for the synthesis of highly conductive LIG from paper and related materials, paving the way for its application, with reduced cost and low environmental impact, in fields ranging from biomonitoring to consumer electronics. published
- Published
- 2022
43. Examining the miscibility and processability of PLA with waste paper particles
- Author
-
Rujnić Havstad, Maja and Pilipović, Ana
- Subjects
Biopolymers ,mixing ,paper ,PLA - Abstract
Background: Part of the printing process in the printing company is paper cutting, which generates waste material in the form of shredded paper (paper dust and waste paper) that cannot be recycled or used to make new paper and generates disposal costs. Objective: To examine the possibility of mixing waste paper with polymer materials and to create a mixture that would yield a material that could be processed by extrusion or injection molding. Methods: Paper particles were sifted through various sieve openings. 15 and 20% of paper of a certain particle size was mixed with PLA. The mixtures of PLA and paper were extruded. Plates were produced from an extruded mixture of paper and PLA by compression molding. Specimens were cut from the plates. Flexural properties were tested on the universal testing machine. Results: With the addition of paper particles, a decrease in flexural properties was observed with respect to the properties of pure PLA. There was no major difference between the flexural properties regarding the paper particle sizes, although the specimens with larger paper particles exhibited better flexural properties, which could be the result of better mixing, i.e. double passage of the mixture through the extruder. Conclusion: The research showed that PLA and waste paper particles can be successfully mixed and processed. Regardless of the significantly bigger particle size, the mixture with larger paper particles showed greater homogeneity after passing through the extruder nozzle twice. Further research should be focused on increasing the proportion of waste paper in the polymer matrix and obtaining as homogeneous a mixture as possible.
- Published
- 2022
44. Starch-Silane Structure and Its Influence on the Hydrophobic Properties of Paper.
- Author
-
Nowak, Tomasz, Mazela, Bartłomiej, Olejnik, Konrad, Peplińska, Barbara, and Perdoch, Waldemar
- Subjects
- *
POLYSACCHARIDES , *PROTECTIVE coatings , *CONTACT angle , *STARCH , *COMPRESSIVE strength , *SURFACE structure , *BIOPOLYMERS - Abstract
Starch is an inexpensive, easily accessible, and widespread natural polymer. Due to its properties and availability, this polysaccharide is an attractive precursor for sustainable products. Considering its exploitation in adhesives and coatings, the major drawback of starch is its high affinity towards water. This study aims to explain the influence of the silane-starch coating on the hydrophobic properties of paper. The analysis of the organosilicon modified starch properties showed an enhanced hydrophobic behavior, suggesting higher durability for the coatings. Molecules of silanes with short aliphatic carbon chains were easily embedded in the starch structure. Longer side chains of silanes were primarily localized on the surface of the starch structure. The best hydrophobic properties were obtained for the paper coated with the composition based on starch and methyltrimethoxysilane. This coating also improved the bursting resistance and compressive strength of the tested paper. A static contact angle higher than 115° was achieved. PDA analysis confirmed the examined material exhibited high barrier properties towards water. The results extend the knowledge of the interaction of silane compositions in the presence of starch. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
45. The Bacterial Degradation of Lignin—A Review.
- Author
-
Grgas, Dijana, Rukavina, Matea, Bešlo, Drago, Štefanac, Tea, Crnek, Vlado, Šikić, Tanja, Habuda-Stanić, Mirna, and Landeka Dragičević, Tibela
- Subjects
FUNGAL enzymes ,LIGNINS ,ACTINOBACTERIA ,BACTERIAL enzymes ,PAPER industry ,BIOPOLYMERS - Abstract
Microbial degradation of lignin, a natural complex biopolymer, a renewable raw material with a wide range of applications, has been mainly directed at fungal systems, nevertheless, recent studies have proposed the bacterial role in lignin degradation and modification since bacteria possess remarkable environmental adaptability, and various production of enzymes and biochemistry. An occurrence of a high proportion of lignin-degrading genes has been confirmed in actinobacteria and proteobacteria classes by bioinformatics analysis, which points to the probability of undiscovered pathways and enzymes. Because of that, bacterial lignin decomposition might be substantially different from fungal lignin decomposition. Bacteria capable of lignin modification and degradation belong to actinomycetes, some Firmicutes, α-proteobacteria, and γ-proteobacteria. The enzymes responsible for lignin degradation are lignin peroxidase, manganese-dependent peroxidase, versatile peroxidase, dye-decolourizing peroxidase, and laccases. One of the main lignin producers is the pulp and paper manufacturing industry. Lignolytic microorganisms have been identified from diverse habitats, such as in plants, soil, wood, and the gut. Bacterial strains Bacillus, Rhodococcus, Sterptomyces, and Pseudomonas have been reported to have lignin decomposition ability. This review aims to describe the role of bacteria in lignin degradation, bacterial species, and bacterial enzymes included in lignin degradation. Several reports about bacterial species involved in lignin degradation are also highlighted, and the current state of the knowledge on the degradation of lignin from the pulp and paper manufacturing industry are reported. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
46. Using biopolymers to strengthen the historical printed paper: mechanical and optical characters.
- Author
-
Noshy, Wafika, Ali Hassan, Rushdya Rabee, and Mohammed, Nada
- Subjects
CARRAGEENANS ,BIOPOLYMERS ,METHYLCELLULOSE ,VIBRATIONAL spectra ,CARBOXYL group ,SPECTRUM analysis ,INFRARED spectra - Abstract
Purpose: This study aims to restore the lost mechanical properties of the prints with carrageenan, methyl hydroxyethyl cellulose (Tylose) and hydroxypropyl methylcellulose (Methocel). Design/methodology/approach: The effect of these materials on the properties of the printed paper (modern and historical samples) has been evaluated under the influence of accelerated aging using pH measurement, the mechanical properties (tensile and elongation), FTIR and color changes. Findings: The three consolidates reduced the acidity of treated samples significantly, but after ageing, it was observed that the pH of aged treated samples decreased slightly as compared to the untreated samples. The results of the mechanical properties showed the superiority of hydroxypropyl methylcellulose (Methocel) in improving the tensile and elongation forces of the samples compared to carrageenan and methyl hydroxyethyl cellulose even during the accelerated aging. Consolidation materials succeeded in reducing ΔE of the paper samples under accelerated aging, especially carrageenan. The IR spectra confirmed that no dramatic difference was observed in topically function vibrations of samples after treatment beside that the O-H stretching band intensity increased observably after treatment with the three consolidates, after ageing the treatment, and it protected the treated paper from oxidation processes as the infrared spectrum analysis showed a decrease in intensities of carbonyl and carboxyl groups as compared to aged untreated samples. Originality/value: The research provides new biopolymers in strengthening the historical printed paper, where printed papers lack studies related to their conservation. This makes the current study a promising step for treating historical printed paper. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
47. New certified home-compostable ecovio for extrusion coating on paper and board of food packaging
- Subjects
Coatings industry ,Petroleum products ,Coatings ,Biopolymers ,Food -- Packaging ,Business ,Chemicals, plastics and rubber industries - Abstract
BASF extends its ecovio portfolio for extrusion coating on paper and board by adding a certified home as well as industrial compostable grade for cold and hot food packaging. The new extrusion coating grade ecovio 70 PS14H6 is food-contact approved and shows excellent barrier properties against liquids, fats, grease, and mineral oil as well as temperature stability at boiling water (up to 100 degC). It is also characterized by outstanding adhesion to many types of paper and board. It thus enables paper applications like cups and pots for dairy products (also frozen), wrappings for sandwiches and cereal bars, bowls and trays for sweets and snacks as well as to-go cups for hot/cold drinks and soup. After usage, food packaging made of paper coated with ecovio 70 PS14H6 can be composted either in garden home compost or industrial composting facilities according to national legislation. The new home-compostable biopolymer thus supports organics recycling and helps to close the nutrient loop to achieve a circular economy. The new home-compostable grade shows better performance than currently available biopolymers on the market. It allows coating of paper and board packaging for food applications to achieve additional barrier properties by mono or multi-layer extrusion without adhesives. The paper coating can be done with the coating line speed comparable to polyethylene (PE). The material shows no adhesion to chill roll and outstanding sealing and printing properties. It is also possible to achieve coating weights like PE depending on application and equipment so that it can also be used to manufacture very thin coatings. The new biopolymer is available with a bio-based content between 70-80% of renewable resources according to ASTM D 6866. It complements the ecovio portfolio for paper coating which consists of tailored industrially compostable grades with properties adjusted to different market needs. BASF's biopolymer ecovio is certified compostable in accordance with standards such as DIN EN 13432. It is a blend of BASF's PBAT ecoflex and renewable raw materials. Typical applications for ecovio are organic waste bags, cling film, fruit and vegetable bags, as well as agricultural mulch films and food packaging applications. Studies show the advantages of ecovio for production, packaging and shelf life of food as well as for the collection of food waste. These advantages are based on the material's certified biodegradability in industrial and home composting as well as in agricultural soil: Food waste is reduced, nutrients are returned to the soil by means of greater volumes of compost - and the accumulation of persistent microplastic in agricultural soil is avoided. This contributes to a circular economy by closing the nutrient cycle via organics recycling. Original source: BASF India Ltd., website: https://www.basf.com/in/en.html, Copyright BASF SE 2023., new material; biopolymers; ecovio; ecovio 70 PS14H6; packaging materials; paper products; protective coatings; renewable feedstocks; [...]
- Published
- 2023
48. Polyhydroxyalkanoate (PHA) Production Using Volatile Fatty Acids Derived from the Anaerobic Digestion of Waste Paper.
- Author
-
Al Battashi, Huda, Al-Kindi, Shatha, Gupta, Vijai Kumar, and Sivakumar, Nallusamy
- Subjects
WASTE paper ,ANAEROBIC digestion ,BUTYRIC acid ,FATTY acids ,SOLID waste ,BIOPOLYMERS - Abstract
Waste paper as a resource for polyhydroxyalkanoate (PHA) production through anaerobic digestion is a low-cost strategy to produce bioplastic. In this study, volatile fatty acids (VFAs) produced from waste paper, one of the significant constituents of municipal solid waste, was utilized as a feedstock for polyhydroxyalkanoate (PHA) production. PHA production from synthetic VFAs by Cupriavidus necator was initially optimized under different VFAs concentrations, VFAs ratios, and nitrogen sources. VFAs concentration of 10 g/L, 5:1:4 ratio of acetic, propionic, and butyric acids (HAc:HPr:HBu) and NaNO
3 as nitrogen source were considered the optimum conditions with 56.98% PHA and 0.31 g/g yield. Anaerobic digestion of shredded office paper (OP/S) produced the maximum VFAs (521.50 mg/L) after 15 days of incubation and were utilized for PHA synthesis. Almost 2.24-fold increase in the yield of PHA was achieved with limited nutrient medium compared to nutrient contained medium with a PHA content of 53.50 and 23.88%, respectively. PHA production using anaerobic effluent of waste paper is a promising approach where a series of pretreatment processes, the expensive enzymatic hydrolysis, and detoxification were no longer required, suggesting an environmentally friendly way of biopolymer production. [ABSTRACT FROM AUTHOR]- Published
- 2021
- Full Text
- View/download PDF
49. BIOPOLYMER APPLICATION TO IMPROVE THE SACK KRAFT PAPER PRODUCTION.
- Author
-
Nayara Bergamo, Casagrande, Flaviana Reis, Milagres, Silvana Meister, Sommer, and Augusto Soares do Amaral, Santos Carlos
- Subjects
CELLULOSE fibers ,SULFATE pulping process ,KRAFT paper ,RF values (Chromatography) ,BIOPOLYMERS ,CELLULOSE - Abstract
In the papermaking process, it can be difficult to maintain specified mechanical-strength levels while minimizing fiber costs and meeting specified targets. If significantly increased, bonding could be achieved without as much refining of the fibers, just adding a biopolymer, then it might be possible to achieve important paper-property targets at lower basis weights. The incorporation of a biopolymer in the papermaking process changes positively the relations between important pulp properties, rendering its application differentiated and advantageous, as these gains will be immediately passed on to the paper obtained. Thus, this study aims to evaluate the development potential of the physical-mechanical properties of Sack Kraft paper through the application of biopolymers in two types of cellulose pulp from Pinus spp. (UKP - Unbleached Kraft Pulp and DKP - Delignified Kraft Pulp), allowing for a possible basis-weight reduction in these papers. Two different biopolymers were developed according to the specific type of cellulose pulp and production process conditions of the present study, B1 and B2. The applications and analyses contemplated two scenarios: 1) cellulose pulp without refining, with 120 minutes of retention time for both pulps; and 2) industrially-refined cellulose pulp, with 23 minutes and 20 minutes retention time for UKP and DKP, respectively. For scenario 1, the cellulose pulp was refined in laboratory after application of the biopolymers, considering the following refining degrees: initial, 15, 20 and 30°SR. For both scenarios, laboratory handsheets were formed to carry out physical and mechanical tests in order to assess properties of the pulp itself, which were: tensile strength, stretch, TEA (Tensile Energy Absorption), tearing resistance and burst strength. Overall, the industrially -refined cellulose pulp with subsequent application of Biopolymer B2 showed the best performance for both types of cellulose pulp, with a substantial increase in tensile index (9% - 16.5%), stretch (9% - 16%), TEA (21% - 30%) and burst index (13% - 14%) for UKP and DKP cellulose pulp, respectively. The results show that applying the biopolymer after refining allows for the gains obtained in cellulose pulp to be passed on to the end product, resulting in expressive gains in Sack Kraft paper quality and production. [ABSTRACT FROM AUTHOR]
- Published
- 2022
50. Fabrication of Paper Sheets Coatings Based on Chitosan/Bacterial Nanocellulose/ZnO with Enhanced Antibacterial and Mechanical Properties
- Author
-
Rafał Rakoczy, Magdalena Onyszko, Ewa Mijowska, Adrian Augustyniak, Maciej Konopacki, and Joanna Jabłońska
- Subjects
Nanofibers ,Nanoparticle ,Metal Nanoparticles ,biopolymers ,02 engineering and technology ,01 natural sciences ,Nanocellulose ,Nanocomposites ,Chitosan ,chemistry.chemical_compound ,Anti-Infective Agents ,X-Ray Diffraction ,Product Packaging ,Biology (General) ,automotive_engineering ,Spectroscopy ,Antibacterial Response ,General Medicine ,021001 nanoscience & nanotechnology ,Computer Science Applications ,Chemistry ,Bacterial cellulose ,ddc:540 ,Zinc Oxide ,0210 nano-technology ,Materials science ,Fabrication ,Surface Properties ,QH301-705.5 ,010402 general chemistry ,Catalysis ,Article ,Inorganic Chemistry ,Microscopy, Electron, Transmission ,Tensile Strength ,Ultimate tensile strength ,paper packaging ,Escherichia coli ,Physical and Theoretical Chemistry ,Cellulose ,Molecular Biology ,QD1-999 ,antimicrobial activity ,Organic Chemistry ,0104 chemical sciences ,chemistry ,Chemical engineering ,Nanofiber ,Mechanical Tests ,Microscopy, Electron, Scanning ,nanoparticles - Abstract
Here, we designed the composition of the coating of the paper sheets composed of chitosan, bacterial cellulose (nanofibres), and ZnO with boosted antibacterial and mechanical activity. We investigated the compositions with ZnO exhibiting two different sizes/shapes: (1) rods and (2) irregular sphere-like particles. The proposed processing of bacterial cellulose resulted in the formation of nanofibers. Antimicrobial behavior was tested using E. coli ATCC® 25922™ following ASTM E2149-13a standard. Mechanical properties of the paper sheets were measured by comparison of tearing resistance, tensile strength, and bursting strength according to ISO 5270 standard. The increased antibacterial response is assigned to the combination of chitosan and ZnO (independently of its shape and size), while the boosted mechanical behavior is due to bacterial cellulose nanofibers. Therefore, the proposed composition is an interesting multifunctional mixture for coatings in food packaging applications.
- Published
- 2021
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.