7,401 results
Search Results
2. Brachytherapy and 3D printing for skin cancer: A review paper
- Author
-
Michal Poltorak, Pawel Banatkiewicz, Lukasz Poltorak, Piotr Sobolewski, Damian Zimon, Maciej Szwast, and Irena Walecka
- Subjects
3d printing ,superficial brachytherapy ,skin cancer ,individual applicator ,applicator design ,Medicine - Abstract
Brachytherapy is a type of radiation therapy, in which a radiation source is placed directly or close to a tumor. It is commonly used to treat skin cancer, and enables precise irradiation treatment of affected area (planning target volume – PTV) while minimizing exposure dose to surrounding healthy tissue (organs at risk – OARs). Recently, the use of 3D printing has begun revolutionizing brachytherapy, as it allows manufacturing of custom-designed applicators for unique shape of skin topography, tumor, and surrounding tissues. Outcome of the combination of 3D printing and brachytherapy has several advantages over traditional treatment planning methods. Some of the advantages are intuitive, whereas others can be concluded from a literature overview as follows: 1) Possibility of developing patient-specific applicators that precisely match the shape of tumor area; 2) Reduction of the time required for applicator production, especially when custom-made devices are needed; 3) Reduction of manufacturing costs; 4) Treatment procedures improvement; 5) Improvement of safety measures accelerated by the development of smart materials (e.g., polymer filaments with admixture of heavy elements); 6) Possibility of nearly instant adjustment into tumor treatment (applicators can be changed as the tumor is changing its shape); and 7) Applicators designed to securely fit to treatment area to hold radioactive source always in the same place for each fraction. Consequently, tumor-provided dose is accurate and leads to effective treatment. In this review paper, we investigated the current state-of-the-art of the application of 3D printing in brachytherapy. A number of existing reports were chosen and reviewed in terms of printing technology, materials used, treatment effectiveness, and fabrication protocols. Furthermore, the development of future directions that should be considered by collaborative teams bridging different fields of science, such as medicine, physics, chemistry, and material science were summarized. With the indicated topics, we hope to stimulate the innovative progress of 3D printing technology in brachytherapy.
- Published
- 2024
- Full Text
- View/download PDF
3. Microfluidic paper-based device coupled with 3D printed imaging box for colorimetric detection in resource-limited settings
- Author
-
Vijay Vaishampayan, Oinam Robita Chanu, Balasubramanian Sivasamy, Muthamilselvi Ponnuchamy, Varshini Karthik, Ambar Pendharkar, Lohith Srinivas Thotakura, Aryan Prabhu, Venkatesan Dhananjeyan, and Ashish Kapoor
- Subjects
Paper-based devices ,Imaging box ,3D Printing ,Colorimetric detection ,Sensor ,Science (General) ,Q1-390 - Abstract
Rapid and effective methods for the detection of analytes such as water contaminants, food adulterants and biomolecules are essential for the protection of public health and environmental protection. Most of the currently established analytical techniques need sophisticated equipment, centralized testing facilities, costly operations, and trained personnel. Such limitations make them inaccessible to the general populace, particularly in regions with limited resources. The emergence of microfluidic devices offers a promising alternative to overcome several such constraints. This work describes a protocol for fabricating a low-cost, open-source paper-based microfluidic device using easily available tools and materials for colorimetric detection of analytes. The ease and simplicity of fabrication allow users to design customized devices. The device is coupled with an imaging box assembled from 3D printed parts to maintain uniform lighting conditions during analytical testing. The platform allows digital imaging using smartphones or cameras to instantaneously capture images of reaction zones on the device for quantitative analysis. The system is demonstrated for detecting hexavalent chromium, a toxic water contaminant. The image analysis is performed using open-source ImageJ for quantification of results. The approach demonstrated in this work can be readily adopted for a wide range of sensing applications.
- Published
- 2023
- Full Text
- View/download PDF
4. Determination of inhibitory activity of Salvia miltiorrhiza extracts on xanthine oxidase with a paper-based analytical device
- Author
-
Xingchu Gong, Jingyuan Shao, Shangxin Guo, Jingjing Pan, and Xiaohui Fan
- Subjects
Paper-based analytical device (PAD) ,Point-of-care testing ,Xanthine oxidase ,Salvia miltiorrhiza extract ,3D printing ,Therapeutics. Pharmacology ,RM1-950 - Abstract
A novel paper-based analytical device (PAD) was prepared and applied to determine the xanthine oxidase (XOD) inhibitory activity of Salvia miltiorrhiza extracts (SME). First, polycaprolactone was 3D printed on filter paper and heated to form hydrophobic barriers. Then the modified paper was cut according to the specific design. Necessary reagents including XOD for the colorimetric assay were immobilized on two separate pieces of paper. By simply adding phosphate buffer, the reaction was performed on the double-layer PAD. Quantitative results were obtained by analyzing the color intensity with the specialized device system (consisting of a smartphone, a detection box and sandwich plates). The 3D-printed detection box was small, with a size of 9.0 cm × 7.0 cm × 11.5 cm. Color component G performed well in terms of linearity and detection limits and thus was identified as the index. The reaction conditions were optimized using a definitive screening design. Moreover, a 10% glycerol solution was found to be a suitable stabilizer. When the stabilizer was added, the activity of XOD could be maintained for at least 15 days under 4 °C or −20 °C storage conditions. The inhibitory activity of SME was investigated and compared to that of allopurinol. The results obtained with the PAD showed agreement with those obtained with the microplate method. In conclusion, the proposed PAD method is simple, accurate and has a potential for point-of-care testing. It also holds promise for use in rapid quality testing of medicinal herbs, intermediate products, and preparations of traditional Chinese medicines.
- Published
- 2021
- Full Text
- View/download PDF
5. Brachytherapy and 3D printing for skin cancer: A review paper.
- Author
-
Poltorak, Michal, Banatkiewicz, Pawel, Poltorak, Lukasz, Sobolewski, Piotr, Zimon, Damian, Szwast, Maciej, and Walecka, Irena
- Subjects
- *
THREE-dimensional printing , *SKIN cancer , *RADIOISOTOPE brachytherapy , *TUMOR treatment , *HIGH dose rate brachytherapy , *HEAVY elements , *TREATMENT effectiveness - Abstract
Brachytherapy is a type of radiation therapy, in which a radiation source is placed directly or close to a tumor. It is commonly used to treat skin cancer, and enables precise irradiation treatment of affected area (planning target volume - PTV) while minimizing exposure dose to surrounding healthy tissue (organs at risk - OARs). Recently, the use of 3D printing has begun revolutionizing brachytherapy, as it allows manufacturing of custom-designed applicators for unique shape of skin topography, tumor, and surrounding tissues. Outcome of the combination of 3D printing and brachytherapy has several advantages over traditional treatment planning methods. Some of the advantages are intuitive, whereas others can be concluded from a literature overview as follows: 1) Possibility of developing patient-specific applicators that precisely match the shape of tumor area; 2) Reduction of the time required for applicator production, especially when custom-made devices are needed; 3) Reduction of manufacturing costs; 4) Treatment procedures improvement; 5) Improvement of safety measures accelerated by the development of smart materials (e.g., polymer filaments with admixture of heavy elements); 6) Possibility of nearly instant adjustment into tumor treatment (applicators can be changed as the tumor is changing its shape); and 7) Applicators designed to securely fit to treatment area to hold radioactive source always in the same place for each fraction. Consequently, tumor-provided dose is accurate and leads to effective treatment. In this review paper, we investigated the current state-of-the-art of the application of 3D printing in brachytherapy. A number of existing reports were chosen and reviewed in terms of printing technology, materials used, treatment effectiveness, and fabrication protocols. Furthermore, the development of future directions that should be considered by collaborative teams bridging different fields of science, such as medicine, physics, chemistry, and material science were summarized. With the indicated topics, we hope to stimulate the innovative progress of 3D printing technology in brachytherapy. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
6. Fabrication of paper-based enzyme immobilized microarray by 3D-printing technique for screening α-glucosidase inhibitors in mulberry leaves and lotus leaves
- Author
-
Shangxin Guo, Xiaotong Lin, Yi Wang, and Xingchu Gong
- Subjects
Paper-based microarray ,Ligand fishing ,α-Glucosidase ,3D printing ,Other systems of medicine ,RZ201-999 - Abstract
Abstract Background The discovery of bioactive compounds in traditional Chinese medicine (TCM) has become an important field in TCM modernization. Ligand fishing is a suitable method for discovery of bioactive compounds in complex mixtures such as TCM with high selectivity. Because of unique advantage of low cost and convenience, paper-based microdevices can be good carriers for enzyme immobilized ligand fishing. Methods As an important enzyme for glucose metabolism, α-glucosidase was immobilized on polycaprolactone–chitosan-modified paper to prepare the microdevice with unique microfluid structure generated by 3D printing technology, which can be easily applied to screen active compounds in herbal extracts. The preparation conditions of the paper microarray were optimized. The activity of immobilized α-glucosidase was verified by colorimetric reactions which can be easily monitored by cellphone. The paper microarray with α-glucosidase immobilized was used to screen active compounds in the water extracts of mulberry leaves and lotus leaves. Results Several key parameters including Na2CO3 solution concentration, Na2CO3 solution volume, glutaraldehyde concentration, crosslinking time of glutaraldehyde and time of α-glucosidase immobilization were optimized. The proposed paper-based microarray was successfully applied in screening active compounds in two herbal extracts. Four compounds including chlorogenic acid, quercetin-3-O-glucuronide, isoquercetin, and quercetin were identified as α-glucosidase inhibitors. The compounds with significant non-specific adsorption caused by chitosan, such as isoquercitrin, astragalin, quercetin, were also found to be active compounds. Conclusions An enzyme immobilized paper microarray was designed and fabricated in this work. Polycaprolactone and chitosan were used to modify filter paper to prepare paper microarrays. Parameters of paper device preparation were optimized. Our findings suggested that 3D-printing paper-based microarrays can be a simple and low-cost approach for discovery of active compounds of TCM.
- Published
- 2019
- Full Text
- View/download PDF
7. Combination of FDM 3D Printing and Compressed Tablet for Preparation of Baclofen as Gastro-Floating Drug Delivery System (Conference Paper )#
- Author
-
Nuha Mohammed Abdulkhaleq and Mowafaq M. Ghareeb
- Subjects
Sustained-release ,3D printing ,hot-melt extrusion ,gastro-floating device ,baclofen ,Pharmacy and materia medica ,RS1-441 - Abstract
This study aimed to develop an oral drug delivery system for gastro-retentive sustained drug release of baclofen by using a 3D printed capsular device since baclofen has a short half-life of 2.5 to 4 hours and has a narrow absorption window. Firstly sustained-release tablets of baclofen were formulated through the hot-melt extrusion of various thermoplastic polymers and direct compression of the extrudate, then a capsular device was designed and 3D printed to contain two air pockets to enable floating of the device and has four windows for drug release. 3D printing of the capsular device was done by an FDM printer using biodegradable PLA filament, and the sustained release tablets were inserted into the device to allow the medicine to be released into the stomach over a longer period. An in vitro buoyance test and an in vitro dissolution test were used to examine the buoyancy and sustained-release features of the formulated gastro-floating system. Five sustained release formulas were developed using different thermoplastic polymers in hot-melt extrusion. Produced tablets were assayed for drug content, hardness, and friability while a DSC study was done on the selected formula. F 5 which contains 20% baclofen, 55% Eudragit RS-100, 20% ethylcellulose, and 5% PEG 4000 showed sustained release where the complete dissolution of the drug occurred in 12 hours, and the gastro-floating device remained floating all the time. This method has a great potential for developing various floating drug delivery systems with the required release profile.
- Published
- 2023
- Full Text
- View/download PDF
8. Fabrication of paper-based enzyme immobilized microarray by 3D-printing technique for screening α-glucosidase inhibitors in mulberry leaves and lotus leaves
- Author
-
Guo, Shangxin, Lin, Xiaotong, Wang, Yi, and Gong, Xingchu
- Published
- 2019
- Full Text
- View/download PDF
9. Celebrating <em>Applied Sciences</em> Reaches 20,000 Articles Milestone: Invited Papers in "Applied Dentistry and Oral Sciences" Section.
- Author
-
Melo, Mary Anne and Melo, Mary Anne
- Subjects
Biochemistry ,Biology, life sciences ,Research & information: general ,3D printing ,CAD-CAM ,CAD/CAM ,Micro-CT ,PMMA ,Saudi ,acrylic teeth ,additive manufacturing ,bacteria ,cigarette smoking ,clinical manifestations ,complete denture ,compression molding technique ,custom post and core ,cytokines ,dental caries ,denture base resin ,denture processing ,disinfection ,fracture resistance ,gingival bleeding ,gingival disorders ,hardness ,inflammation ,injection molding technique ,instrumented indentation testing ,laser profilometry ,linear dimensional change ,marginal misfit ,middle-and low-income countries ,migrant children's oral health status ,migrants ,non-anatomic teeth ,non-precious alloy ,obturation technique ,oral health ,oral health of migrants ,oral hygiene habits ,oral scurvy ,pain ,peri-implant crevicular fluid ,peri-implantitis ,periapical surgery ,polymers ,polymethyl methacrylate ,posterior tooth form ,preoperative factors ,prospective study ,resin composite ,retention ,root filling ,scurvy ,sealers ,selective laser melting ,semi-anatomic teeth ,shade and age ,skin and shade ,skin color ,subtractive manufacturing ,surgical endodontic treatment ,titanium alloy ,tooth movement ,tooth shade ,vertical fracture ,vitamin C deficiency ,zirconia - Abstract
Summary: We are delighted to present this Special Issue to celebrate a remarkable milestone in the journey of Applied Dentistry. With great pleasure, we announce the publication of the journal's 20,000th paper. This remarkable achievement reflects the unwavering commitment and dedication of our esteemed authors, reviewers, and readers who have contributed to the advancement of dental research.Over the years, Applied Dentistry has emerged as a beacon of knowledge, serving as a platform for the dissemination of cutting-edge research and innovative ideas in various domains of dental science. Our journal encompasses a wide range of disciplines, covering everything from dental materials and biomaterials to preventive and therapeutic strategies, from clinical applications to regenerative dentistry.We envision this milestone as a stepping stone toward even greater accomplishments. Through the collaboration and collective efforts of researchers worldwide, we strive to push the boundaries of dental science, explore new frontiers, and improve oral health outcomes for individuals across the globe.In conclusion, we extend our warmest congratulations to all those who have contributed to the publication of the Special Issue celebrating Applied Dentistry's 20,000th paper milestone.
10. Preparation of paper-based conductive pattern for 3D printing
- Author
-
Chenfei Zhao, Jun Wang, Bo Qian, and Zhuoqing Zhang
- Subjects
3D printing ,flexible electronics ,flexible circuit boards ,graphene conductive ink ,Science ,Physics ,QC1-999 - Abstract
With the development of printed electronics technology, the demand for printed conductive inks had also put forward higher standards. The shortcomings of traditional printed circuit boards, such as complex technology, consumables, and pollution, had also been resolved with the development of 3D printing technology. In this paper, low-content silver nanoparticles were blended with graphene alcohol slurry and dissolved in a non-polluting solvent such as absolute ethanol. The synergistic effect of the composite of the hexagonal structure of the graphene sheet and the silver nanoparticles improved the ink’s performance of electrical conductivity, adding water-based polyurethane/acrylic resin system to improve the adhesion between ink and paper. The conductive ink can be used to 3D print circuit circuits on paper. After drying, the resistance was measured. After the battery, diode, and switch were connected, a circuit diagram was made. After pressing the diode emits was lighted. This work is expected to be applied to flexible circuit boards to provide basic research.
- Published
- 2023
- Full Text
- View/download PDF
11. UV-Curable Bio-Based Polymers Derived from Industrial Pulp and Paper Processes
- Author
-
Lorenzo Pezzana, Eva Malmström, Mats Johansson, and Marco Sangermano
- Subjects
pulp and paper industry ,lignin ,UV-curing ,3D printing ,Organic chemistry ,QD241-441 - Abstract
Bio-based monomers represent the future market for polymer chemistry, since the political economics of different states promote green ventures toward more sustainable materials and processes. Industrial pulp and paper processing represent a large market that could advance the use of by-products to avoid waste production and reduce pollution. Lignin represents the most available side product that can be used to produce a bio-based monomer. This review is concentrated on the possibility of using bio-based monomer derivates from pulp and the paper industry for UV-curing processing. UV-curing represents the new frontier for thermoset production, allowing a fast reaction cure, less energy demand, and the elimination of solvent. The growing demand for new monomers increases research in the environmental field to substitute for petroleum-based products. This review provides an overview of the main monomers and relative families of compounds derived from industrial processes that are suitable for UV-curing. Particular focus is given to the developments reached in the last few years concerning lignin, rosin and terpenes and the related possible applications of these in UV-curing chemistry.
- Published
- 2021
- Full Text
- View/download PDF
12. 3D-PAD: Paper-Based Analytical Devices with Integrated Three-Dimensional Features
- Author
-
James S. Ng and Michinao Hashimoto
- Subjects
paper-based microfluidics ,paper analytical device ,3D printing ,microfabrication ,digital fabrication ,Biotechnology ,TP248.13-248.65 - Abstract
This paper describes the use of fused deposition modeling (FDM) printing to fabricate paper-based analytical devices (PAD) with three-dimensional (3D) features, which is termed as 3D-PAD. Material depositions followed by heat reflow is a standard approach for the fabrication of PAD. Such devices are primarily two-dimensional (2D) and can hold only a limited amount of liquid samples in the device. This constraint can pose problems when the sample consists of organic solvents that have low interfacial energies with the hydrophobic barriers. To overcome this limitation, we developed a method to fabricate PAD integrated with 3D features (vertical walls as an example) by FDM 3D printing. 3D-PADs were fabricated using two types of thermoplastics. One thermoplastic had a low melting point that formed hydrophobic barriers upon penetration, and another thermoplastic had a high melting point that maintained 3D features on the filter paper without reflowing. We used polycaprolactone (PCL) for the former, and polylactic acid (PLA) for the latter. Both PCL and PLA were printed with FDM without gaps at the interface, and the resulting paper-based devices possessed hydrophobic barriers consisting of PCL seamlessly integrated with vertical features consisting of PLA. We validated the capability of 3D-PAD to hold 30 μL of solvents (ethanol, isopropyl alcohol, and acetone), all of which would not be retained on conventional PADs fabricated with solid wax printers. To highlight the importance of containing an increased amount of liquid samples, a colorimetric assay for the formation of dimethylglyoxime (DMG)-Ni (II) was demonstrated using two volumes (10 μL and 30 μL) of solvent-based dimethylglyoxime (DMG). FDM printing of 3D-PAD enabled the facile construction of 3D structures integrated with PAD, which would find applications in paper-based chemical and biological assays requiring organic solvents.
- Published
- 2021
- Full Text
- View/download PDF
13. Enhanced Sensing Behavior of Three-Dimensional Microfluidic Paper-Based Analytical Devices (3D-μPADs) with Evaporation-Free Enclosed Channels for Point-of-Care Testing
- Author
-
Jaehyung Jeon, Chanyong Park, Dinesh Veeran Ponnuvelu, and Sungsu Park
- Subjects
paper-based analytical devices ,3D printing ,enclosed channel ,small-volume sample ,evaporation ,point-of-care testing ,Medicine (General) ,R5-920 - Abstract
Despite the potential in fabrication of microfluidic paper-based analytical devices (μPADs) for point-of-care testing (POCT) kits, the development of simple, accurate, and rapid devices with higher sensitivity remains challenging. Here, we report a novel method for 3D-μPAD fabrication with enclosed channels using vat photopolymerization to avoid fluid evaporation. In detail, height of the enclosed channels was adjusted from 0.3 to 0.17 mm by varying the UV exposure time from 1 to 4 s for the top barrier, whereas the exposure time for the bottom and side barriers was fixed. As a result, sample flow in the enclosed channels of 3D-μPADs showed lesser wicking speed with very scant evaporation compared to that in the hemi channels in the 3D-μPADs. The stoppage of evaporation in the enclosed channels significantly improved the gray intensity and uniformity in the detection zone of the 3D-μPADs, resulting in as low as 0.3 mM glucose detection. Thus 3D-μPADs with enclosed channels showed enhanced sensitivity compared to the 3D-μPADs with hemi channels when dealing with a small volume sample. Our work provides a new insight into 3D-μPAD design with enclosed channels, which redefines the methodology in 3D printing.
- Published
- 2021
- Full Text
- View/download PDF
14. Determination of inhibitory activity of Salvia miltiorrhiza extracts on xanthine oxidase with a paper-based analytical device.
- Author
-
Gong, Xingchu, Shao, Jingyuan, Guo, Shangxin, Pan, Jingjing, and Fan, Xiaohui
- Subjects
XANTHINE oxidase ,SALVIA miltiorrhiza ,CHINESE medicine ,COLORIMETRY ,HERBAL medicine ,POINT-of-care testing - Abstract
A novel paper-based analytical device (PAD) was prepared and applied to determine the xanthine oxidase (XOD) inhibitory activity of Salvia miltiorrhiza extracts (SME). First, polycaprolactone was 3D printed on filter paper and heated to form hydrophobic barriers. Then the modified paper was cut according to the specific design. Necessary reagents including XOD for the colorimetric assay were immobilized on two separate pieces of paper. By simply adding phosphate buffer, the reaction was performed on the double-layer PAD. Quantitative results were obtained by analyzing the color intensity with the specialized device system (consisting of a smartphone, a detection box and sandwich plates). The 3D-printed detection box was small, with a size of 9.0 cm × 7.0 cm × 11.5 cm. Color component G performed well in terms of linearity and detection limits and thus was identified as the index. The reaction conditions were optimized using a definitive screening design. Moreover, a 10% glycerol solution was found to be a suitable stabilizer. When the stabilizer was added, the activity of XOD could be maintained for at least 15 days under 4 °C or −20 °C storage conditions. The inhibitory activity of SME was investigated and compared to that of allopurinol. The results obtained with the PAD showed agreement with those obtained with the microplate method. In conclusion, the proposed PAD method is simple, accurate and has a potential for point-of-care testing. It also holds promise for use in rapid quality testing of medicinal herbs, intermediate products, and preparations of traditional Chinese medicines. [Display omitted] • The inhibitory activity of Salvia miltiorrhiza extracts on xanthine oxidase was determined with PADs. • A double-layer structure of PAD was designed to avoid enzyme-substrate reactions during storage. • A reaction device and a detection system were suitable for point-of-care test. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
15. Paper Need Not Be Flat: Paper and Biomaterials Industries Need to Converge to Bring about True Innovation
- Author
-
Lokendra Pal and Margaret Joyce
- Subjects
Paper ,Biomaterials ,Nanocellulose ,3D Printing ,Additive Manufacturing ,Flexible Hybrid Electronics ,Smart Sensors ,Displays ,Nature Homes ,Biotechnology ,TP248.13-248.65 - Abstract
Biomaterials and new processes (3D printing and flexible hybrid electronics) offer opportunities to break free from a 2D paper world by allowing for the development of smart multi-dimensional structures. While there has been recent progress reported in each of these areas of technology, to date, the merger of these technologies has been very limited. We believe that their merger offers boundless opportunities and an opportunity for the paper industry to innovate a low cost, sustainable housing solution capable of promoting the well-being of its occupants while minimizing the environmental impact of its daily use.
- Published
- 2017
- Full Text
- View/download PDF
16. A Flexible Capacitive Paper-Based Pressure Sensor Fabricated Using 3D Printing
- Author
-
Wendan Jia, Qiang Zhang, Yongqiang Cheng, Jie Wang, Hulin Zhang, Shengbo Sang, and Jianlong Ji
- Subjects
AgNWs ,structured flexible pressure sensor ,capacitive sensor ,3D printing ,Biochemistry ,QD415-436 - Abstract
Flexible pressure sensors usually exhibit high sensitivity, excellent resolution, and can be mass-produced. Herein, a high-resolution, capacitive, paper-based, 3D-printed pressure sensor with a simple, low-cost preparation method is proposed. The sensor has a wide detection range (300–44,000 Pa), a short response time (
- Published
- 2022
- Full Text
- View/download PDF
17. Supply of Hacksaw Blade, Metal Pieces, Aluminium Round Rod, MS Rod, MS Sq Rod, 3D printer filament PLA KGs, 3D printer filament ABS KGs, Electrode, GI Sheet, Iron Plate Grounding Plate, Grinding Wheel, S Paper, Cut off Wheel, Professional Circular saw bla
- Subjects
3D printing ,Business, international - Abstract
Tenders are invited for Supply of Hacksaw Blade, Metal Pieces, Aluminium Round Rod, MS Rod, MS Sq Rod, 3D printer filament PLA KGs, 3D printer filament ABS KGs, Electrode, GI [...]
- Published
- 2023
18. Open-source micro-tensile testers via additive manufacturing for the mechanical characterization of thin films and papers.
- Author
-
Nandy, Krishanu, Collinson, David W., Scheftic, Charlie M., and Brinson, L. Catherine
- Subjects
- *
THIN films , *PAPER , *TENSILE strength , *MECHANICAL behavior of materials , *GRAPHENE oxide - Abstract
The cost of specialized scientific equipment can be high and with limited funding resources, researchers and students are often unable to access or purchase the ideal equipment for their projects. In the fields of materials science and mechanical engineering, fundamental equipment such as tensile testing devices can cost tens to hundreds of thousands of dollars. While a research lab often has access to a large-scale testing machine suitable for conventional samples, loading devices for meso- and micro-scale samples for in-situ testing with the myriad of microscopy tools are often hard to source and cost prohibitive. Open-source software has allowed for great strides in the reduction of costs associated with software development and open-source hardware and additive manufacturing have the potential to similarly reduce the costs of scientific equipment and increase the accessibility of scientific research. To investigate the feasibility of open-source hardware, a micro-tensile tester was designed with a freely accessible computer-aided design package and manufactured with a desktop 3D-printer and off-the-shelf components. To our knowledge this is one of the first demonstrations of a tensile tester with additively manufactured components for scientific research. The capabilities of the tensile tester were demonstrated by investigating the mechanical properties of Graphene Oxide (GO) paper and thin films. A 3D printed tensile tester was successfully used in conjunction with an atomic force microscope to provide one of the first quantitative measurements of GO thin film buckling under compression. The tensile tester was also used in conjunction with an atomic force microscope to observe the change in surface topology of a GO paper in response to increasing tensile strain. No significant change in surface topology was observed in contrast to prior hypotheses from the literature. Based on this result obtained with the new open source tensile stage we propose an alternative hypothesis we term ‘superlamellae consolidation’ to explain the initial deformation of GO paper. The additively manufactured tensile tester tested represents cost savings of >99% compared to commercial solutions in its class and offers simple customization. However, continued development is needed for the tensile tester presented here to approach the technical specifications achievable with commercial solutions. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
19. Advanced Surface Color Quality Assessment in Paper-Based Full-Color 3D Printing
- Author
-
Jieni Tian, Jiangping Yuan, Hua Li, Danyang Yao, and Guangxue Chen
- Subjects
3D printing ,surface property ,quality evaluation ,color printing ,image quality metric ,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
Color 3D printing allows for 3D-printed parts to represent 3D objects more realistically, but its surface color quality evaluation lacks comprehensive objective verification considering printing materials. In this study, a unique test model was designed and printed using eco-friendly and vivid paper-based full-color 3D printing as an example. By measuring the chromaticity, roughness, glossiness, and whiteness properties of 3D-printed surfaces and by acquiring images of their main viewing surfaces, this work skillfully explores the correlation between the color representation of a paper-based 3D-printed coloring layer and its attached underneath blank layer. Quantitative analysis was performed using ΔE*ab, feature similarity index measure of color image (FSIMc), and improved color-image-difference (iCID) values. The experimental results show that a color difference on color-printed surfaces exhibits a high linear correlation trend with its FSIMc metric and iCID metric. The qualitative analysis of microscopic imaging and the quantitative analysis of the above three surface properties corroborate the prediction of the linear correlation between color difference and image-based metrics. This study can provide inspiration for the development of computational coloring materials for additive manufacturing.
- Published
- 2021
- Full Text
- View/download PDF
20. Enhanced Sensing Behavior of Three-Dimensional Microfluidic Paper-Based Analytical Devices (3D-μPADs) with Evaporation-Free Enclosed Channels for Point-of-Care Testing
- Author
-
Sungsu Park, Jaehyung Jeon, Dinesh Veeran Ponnuvelu, and Chanyong Park
- Subjects
Medicine (General) ,Fabrication ,Materials science ,Clinical Biochemistry ,Microfluidics ,Flow (psychology) ,Evaporation ,3D printing ,02 engineering and technology ,paper-based analytical devices ,01 natural sciences ,Article ,evaporation ,R5-920 ,enclosed channel ,business.industry ,010401 analytical chemistry ,Paper based ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,point-of-care testing ,Optoelectronics ,small-volume sample ,0210 nano-technology ,business ,Sensitivity (electronics) ,Intensity (heat transfer) - Abstract
Despite the potential in fabrication of microfluidic paper-based analytical devices (μPADs) for point-of-care testing (POCT) kits, the development of simple, accurate, and rapid devices with higher sensitivity remains challenging. Here, we report a novel method for 3D-μPAD fabrication with enclosed channels using vat photopolymerization to avoid fluid evaporation. In detail, height of the enclosed channels was adjusted from 0.3 to 0.17 mm by varying the UV exposure time from 1 to 4 s for the top barrier, whereas the exposure time for the bottom and side barriers was fixed. As a result, sample flow in the enclosed channels of 3D-μPADs showed lesser wicking speed with very scant evaporation compared to that in the hemi channels in the 3D-μPADs. The stoppage of evaporation in the enclosed channels significantly improved the gray intensity and uniformity in the detection zone of the 3D-μPADs, resulting in as low as 0.3 mM glucose detection. Thus 3D-μPADs with enclosed channels showed enhanced sensitivity compared to the 3D-μPADs with hemi channels when dealing with a small volume sample. Our work provides a new insight into 3D-μPAD design with enclosed channels, which redefines the methodology in 3D printing.
- Published
- 2021
21. 3D-PAD: Paper-Based Analytical Devices with Integrated Three-Dimensional Features
- Author
-
Michinao Hashimoto and James S. Ng
- Subjects
Paper ,Materials science ,Fabrication ,Thermoplastic ,lcsh:Biotechnology ,paper-based microfluidics ,Clinical Biochemistry ,3D printing ,digital fabrication ,Biosensing Techniques ,law.invention ,chemistry.chemical_compound ,Polylactic acid ,law ,lcsh:TP248.13-248.65 ,Composite material ,microfabrication ,chemistry.chemical_classification ,Fused deposition modeling ,Filter paper ,business.industry ,Communication ,paper analytical device ,General Medicine ,chemistry ,Polycaprolactone ,Printing, Three-Dimensional ,business ,Microfabrication - Abstract
This paper describes the use of fused deposition modeling (FDM) printing to fabricate paper-based analytical devices (PAD) with three-dimensional (3D) features, which is termed as 3D-PAD. Material depositions followed by heat reflow is a standard approach for the fabrication of PAD. Such devices are primarily two-dimensional (2D) and can hold only a limited amount of liquid samples in the device. This constraint can pose problems when the sample consists of organic solvents that have low interfacial energies with the hydrophobic barriers. To overcome this limitation, we developed a method to fabricate PAD integrated with 3D features (vertical walls as an example) by FDM 3D printing. 3D-PADs were fabricated using two types of thermoplastics. One thermoplastic had a low melting point that formed hydrophobic barriers upon penetration, and another thermoplastic had a high melting point that maintained 3D features on the filter paper without reflowing. We used polycaprolactone (PCL) for the former, and polylactic acid (PLA) for the latter. Both PCL and PLA were printed with FDM without gaps at the interface, and the resulting paper-based devices possessed hydrophobic barriers consisting of PCL seamlessly integrated with vertical features consisting of PLA. We validated the capability of 3D-PAD to hold 30 μL of solvents (ethanol, isopropyl alcohol, and acetone), all of which would not be retained on conventional PADs fabricated with solid wax printers. To highlight the importance of containing an increased amount of liquid samples, a colorimetric assay for the formation of dimethylglyoxime (DMG)-Ni (II) was demonstrated using two volumes (10 μL and 30 μL) of solvent-based dimethylglyoxime (DMG). FDM printing of 3D-PAD enabled the facile construction of 3D structures integrated with PAD, which would find applications in paper-based chemical and biological assays requiring organic solvents.
- Published
- 2021
22. A Flexible Capacitive Paper-Based Pressure Sensor Fabricated Using 3D Printing.
- Author
-
Jia, Wendan, Zhang, Qiang, Cheng, Yongqiang, Wang, Jie, Zhang, Hulin, Sang, Shengbo, and Ji, Jianlong
- Subjects
PRESSURE sensors ,CAPACITIVE sensors ,MEDICAL equipment ,THREE-dimensional printing ,FLEXIBLE structures ,DETECTORS ,LOADING & unloading - Abstract
Flexible pressure sensors usually exhibit high sensitivity, excellent resolution, and can be mass-produced. Herein, a high-resolution, capacitive, paper-based, 3D-printed pressure sensor with a simple, low-cost preparation method is proposed. The sensor has a wide detection range (300–44,000 Pa), a short response time (<50 ms), and high mechanical stability during repeated loading/unloading (3750 Pa). It can measure the weight of an object precisely, from which the shape of the object can be predicted. The sensor can also perform gait detection. The advantages presented by low-cost, high sensitivity, wide detection range, and the ability to be mass-produced make these sensors potential candidates for applications in contact detection and wearable medical devices. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
23. Paper Need Not Be Flat: Paper and Biomaterials Industries Need to Converge to Bring about True Innovation.
- Author
-
Pal, Lokendra and Joyce, Margaret
- Subjects
- *
PAPER industry , *INNOVATIONS in business , *THREE-dimensional printing , *HOUSING development , *ENVIRONMENTAL impact analysis , *HOUSING & the environment - Abstract
Biomaterials and new processes (3D printing and flexible hybrid electronics) offer opportunities to break free from a 2D paper world by allowing for the development of smart multi-dimensional structures. While there has been recent progress reported in each of these areas of technology, to date, the merger of these technologies has been very limited. We believe that their merger offers boundless opportunities and an opportunity for the paper industry to innovate a low cost, sustainable housing solution capable of promoting the well-being of its occupants while minimizing the environmental impact of its daily use. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
24. 3D Printed Paper-Based Microfluidic Analytical Devices
- Author
-
Yong He, Qing Gao, Wen-Bin Wu, Jing Nie, and Jian-Zhong Fu
- Subjects
3D printing ,paper-based microfluidic analytical devices (μPADs) ,flow speed programming ,Mechanical engineering and machinery ,TJ1-1570 - Abstract
As a pump-free and lightweight analytical tool, paper-based microfluidic analytical devices (μPADs) attract more and more interest. If the flow speed of μPAD can be programmed, the analytical sequences could be designed and they will be more popular. This reports presents a novel μPAD, driven by the capillary force of cellulose powder, printed by a desktop three-dimensional (3D) printer, which has some promising features, such as easy fabrication and programmable flow speed. First, a suitable size-scale substrate with open microchannels on its surface is printed. Next, the surface of the substrate is covered with a thin layer of polydimethylsiloxane (PDMS) to seal the micro gap caused by 3D printing. Then, the microchannels are filled with a mixture of cellulose powder and deionized water in an appropriate proportion. After drying in an oven at 60 °C for 30 min, it is ready for use. As the different channel depths can be easily printed, which can be used to achieve the programmable capillary flow speed of cellulose powder in the microchannels. A series of microfluidic analytical experiments, including quantitative analysis of nitrite ion and fabrication of T-sensor were used to demonstrate its capability. As the desktop 3D printer (D3DP) is very cheap and accessible, this device can be rapidly printed at the test field with a low cost and has a promising potential in the point-of-care (POC) system or as a lightweight platform for analytical chemistry.
- Published
- 2016
- Full Text
- View/download PDF
25. A systematic literature review on recent trends of machine learning applications in additive manufacturing.
- Author
-
Xames, Md Doulotuzzaman, Torsha, Fariha Kabir, and Sarwar, Ferdous
- Subjects
MACHINE learning ,INDUSTRY 4.0 ,MANUFACTURING processes ,CONFERENCE papers ,PERIODICAL articles - Abstract
Additive manufacturing (AM) offers the advantage of producing complex parts more efficiently and in a lesser production cycle time as compared to conventional subtractive manufacturing processes. It also provides higher flexibility for diverse applications by facilitating the use of a variety of materials and different processing technologies. With the exceptional growth of computing capability, researchers are extensively using machine learning (ML) techniques to control the performance of every phase of AM processes, such as design, process parameters modeling, process monitoring and control, quality inspection, and validation. Also, ML methods have made it possible to develop cybermanufacturing for AM systems and thus revolutionized Industry 4.0. This paper presents the state-of-the-art applications of ML in solving numerous problems related to AM processes. We give an overview of the research trends in this domain through a systematic literature review of relevant journal articles and conference papers. We summarize recent development and existing challenges to point out the direction of future research scope. This paper can provide AM researchers and practitioners with the latest information consequential for further development. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
26. Paper Need Not Be Flat: Paper and Biomaterials Industries Need to Converge to Bring about True Innovation
- Author
-
Margaret Joyce and Lokendra Pal
- Subjects
Engineering ,Environmental Engineering ,business.industry ,lcsh:Biotechnology ,010401 analytical chemistry ,Sustainable housing ,Mechanical engineering ,3D printing ,Bioengineering ,02 engineering and technology ,Paper ,Biomaterials ,Nanocellulose ,3D Printing ,Additive Manufacturing ,Flexible Hybrid Electronics ,Smart Sensors ,Displays ,Nature Homes ,021001 nanoscience & nanotechnology ,01 natural sciences ,Manufacturing engineering ,0104 chemical sciences ,lcsh:TP248.13-248.65 ,Environmental impact assessment ,Electronics ,0210 nano-technology ,business ,Waste Management and Disposal - Abstract
Biomaterials and new processes (3D printing and flexible hybrid electronics) offer opportunities to break free from a 2D paper world by allowing for the development of smart multi-dimensional structures. While there has been recent progress reported in each of these areas of technology, to date, the merger of these technologies has been very limited. We believe that their merger offers boundless opportunities and an opportunity for the paper industry to innovate a low cost, sustainable housing solution capable of promoting the well-being of its occupants while minimizing the environmental impact of its daily use.
- Published
- 2017
27. Automatic Unfolding of CityGML Buildings to Paper Models
- Author
-
Steffen Goebbels and Regina Pohle-Fröhlich
- Subjects
3D city models ,business.industry ,Computer science ,Computer graphics (images) ,3D printing ,Monochrome ,Color printing ,CityGML ,business ,Greedy algorithm ,Blank ,unfolding ,Visualization - Abstract
3D city models are mainly viewed on computer screens, but many municipalities also use 3D printing to make urban planning tangible. Since 3D color printing is still comparatively expensive and the colors often fade over time, many of these models are monochrome. Here, color textured paper models offer an inexpensive and under-appreciated alternative. In this paper, a greedy algorithm adapted to CityGML building models is presented, which creates print templates for such paper models. These 2D layouts consist of cut edges and fold edges that bound polygons of a building. The polygons can be textured or left blank depending on the existence of CityGML textures. Glue tabs are attached to cut edges. In addition to the haptic 3D visualization, the quality of the 3D models can sometimes be better assessed on the basis of the print templates than from a perspective projection. The unfolding procedure was applied to parts of the freely available CityGML model of Berlin as well as to parts of models of the cities of Dortmund and Krefeld.
- Published
- 2021
- Full Text
- View/download PDF
28. UV-Curable Bio-Based Polymers Derived from Industrial Pulp and Paper Processes.
- Author
-
Pezzana, Lorenzo, Malmström, Eva, Johansson, Mats, Sangermano, Marco, and Rico, Sergi Gallego
- Subjects
- *
PAPER pulp , *LIGNINS , *LIGNIN structure , *ELECTRIC power consumption , *POLYMERS , *PAPER industry , *MANUFACTURING processes - Abstract
Bio-based monomers represent the future market for polymer chemistry, since the political economics of different states promote green ventures toward more sustainable materials and processes. Industrial pulp and paper processing represent a large market that could advance the use of by-products to avoid waste production and reduce pollution. Lignin represents the most available side product that can be used to produce a bio-based monomer. This review is concentrated on the possibility of using bio-based monomer derivates from pulp and the paper industry for UV-curing processing. UV-curing represents the new frontier for thermoset production, allowing a fast reaction cure, less energy demand, and the elimination of solvent. The growing demand for new monomers increases research in the environmental field to substitute for petroleum-based products. This review provides an overview of the main monomers and relative families of compounds derived from industrial processes that are suitable for UV-curing. Particular focus is given to the developments reached in the last few years concerning lignin, rosin and terpenes and the related possible applications of these in UV-curing chemistry. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
29. Waste office paper filled polylactic acid composite filaments for 3D printing.
- Author
-
Tao, Yubo, Liu, Mengmeng, Han, Wenjia, and Li, Peng
- Subjects
- *
WASTE paper , *THREE-dimensional printing , *PAPER recycling , *POLYLACTIC acid , *FIBERS , *SILANE coupling agents - Abstract
Developing 3D printable waste paper based biocomposites is a potentially greener alternative to traditional waste paper recycling methods. In this paper, waste office paper (WOP) filled polylactide acid (PLA) biocomposites were prepared as filaments for Fused Filament Fabrication (FFF). The morphology, rheology, thermal properties, and physical properties of PLA-WOP composites were investigated. Results revealed that the addition of WOP improved the composites' melt flow abilities. The T g and T m of composites remained similar to the neat PLA. However, tensile strengths of the prints decreased with the increase of WOP content, which could be attributed to the heterogeneous dispersion and aggregation caused by the abundance of WOP in the system. When 5% WOP was used, the elongation at break increased in comparison with pure PLA specimens. Nonetheless, when the WOP content was increased to 15%, the elongation at break decreased. To improve the mechanical properties of the prints, a silane coupling agent (γ-methacryloxypropyltrimethoxylsilane, KH570) was used to modify WOP granules. The mechanical properties were clearly enhanced post KH570 treatment. Furthermore, FTIR analyses demonstrated that the hydrogen bonding improved interfacial adhesion between WOP fillers and the PLA matrix. Thermal decomposition showed that the PLA-WOP composites had virtually no degradation below 260 °C, indicating that the composite filaments are safe for indoor 3D printing. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
30. Adoption of additive manufacturing technology: drivers, barriers and impacts on upstream supply chain design
- Author
-
Ronchini, Alessio, Moretto, Antonella Maria, and Caniato, Federico
- Published
- 2023
- Full Text
- View/download PDF
31. United States : FDA Publishes Discussion Paper and Seeks Public Input on 3D Printing of Medical Devices at the Point of Care
- Subjects
Medical equipment ,3D printing ,Health planning ,Physiological apparatus ,Business, international - Abstract
The 3D printing of medical devices is at the forefront of innovation and health care. 3D printing at hospitals and other patient-care settings enables health care professionals to quickly create [...]
- Published
- 2021
32. Expanding sacrificially printed microfluidic channel-embedded paper devices for construction of volumetric tissue models in vitro
- Author
-
Junlong Liao, Carolina Chávez-Madero, Hongbin Li, Grissel Trujillo-de Santiago, Mian Wang, Mario Moises Alvarez, Zixuan Wang, Jinmei He, Shabir Hassan, Feng Cheng, Xia Cao, Wanlu Li, Yu Shrike Zhang, Juan Antonio Robledo-Lara, and Jingwei Xie
- Subjects
Materials science ,0206 medical engineering ,Microfluidics ,Biomedical Engineering ,3D printing ,Bioengineering ,Nanotechnology ,02 engineering and technology ,Biochemistry ,Article ,Biomaterials ,chemistry.chemical_compound ,Tissue engineering ,Microfluidic channel ,Lab-On-A-Chip Devices ,Humans ,Porosity ,Microchannel ,Tissue Engineering ,Tissue Scaffolds ,business.industry ,Structural integrity ,General Medicine ,021001 nanoscience & nanotechnology ,020601 biomedical engineering ,chemistry ,Bacterial cellulose ,Printing, Three-Dimensional ,0210 nano-technology ,business ,Biotechnology - Abstract
We report a method for expanding microchannel-embedded paper devices using a precisely controlled gas-foaming technique for the generation of volumetric tissue models in vitro. We successfully fabricated hollow, perfusable microchannel patterns contained in a densely entangled network of bacterial cellulose nanofibrils using matrix-assisted sacrificial three-dimensional printing, and demonstrated the maintenance of their structural integrity after gas-foaming-enabled expansion in an aqueous solution of NaBH4. The resulting expanded microchannel-embedded paper devices showed multilayered laminar structures with controllable thicknesses as a function of both NaBH4 concentration and expansion time. With expansion, the thickness and porosity of the bacterial cellulose network were significantly increased. As such, cellular infiltration was promoted comparing to as-prepared, non-expanded devices. This simple technique enables the generation of truly volumetric, cost-effective human-based tissue models, such as vascularized tumor models, for potential applications in preclinical drug screening and personalized therapeutic selection.
- Published
- 2020
33. Research on imminent enlargements of smart materials and structures towards novel 4D printing (4DP: SMs-SSs).
- Author
-
Farid, Muhammad Imran, Wu, Wenzheng, Guiwei, Li, and Yu, Zhao
- Subjects
SMART materials ,SHAPE memory alloys ,CONSTRUCTION materials ,PRINT materials ,ELECTRONIC paper ,SMART structures - Abstract
Smart structures of 4D printing are perhaps interdisciplinary research area with significant development and applicability future. The cornerstone of 4D printing is smart materials. When a stimulus is put in front of this structure, it changes into a different structure. This article initially provides a succinct insight of the aforementioned 4DP: SMs-SSs: 4D printing (4DP) technology imminent enlargements of smart material's (SMs) prospective to physique smart structure (SSs). Investigation into 4D printing has pulled in phenomenal enthusiasm. The research work of 4DP: SMs-SSs has stimulated promising future. The paper discusses smart materials and their potential towards mainstream 4D printing for smart constructions (4DP: SMs-SSs). Cursory research write-up on smart materials associated 4D printing approaches to process them based on adaptability to stimuli, fabrication, control mechanisms, multi physics modeling, and existing as well as emerging functionalities. Indeed, innovative structural initiatives could perhaps inspire new paradigms for stimulate positive structures. Novelty structures are being thoroughly researched, and new ideas will be incorporated. Programmability, reactivity toward and adaptability to their circumstances, and automation are all functionality of 4D-printed items. The article's conclusion is that 4DP: SMs that can create intelligent/smart structures (SSs) will even trigger a massive era of construction material. This article shows an insight into how quickly technology is changing, how some researchers and scholars are figuring out what it can do, and how engineers could use the ideas. The adoption of smart materials will assist in resolving the problem to a greater extent. 4D printing relies on shape memory alloys/polymers (SMAs/SMPs) as so forth organic materials. Imminent enlargements of smart materials prospective to physique smart structures are still being experimented with by scientists and engineers. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
34. Three-Dimensional Printing of Living Mycelium-Based Composites: Material Compositions, Workflows, and Ways to Mitigate Contamination.
- Author
-
Mohseni, Alale, Vieira, Fabricio Rocha, Pecchia, John A., and Gürsoy, Benay
- Subjects
MYCELIUM ,COMPOSITE materials ,CONSTRUCTION industry ,THREE-dimensional printing ,WASTE paper - Abstract
The construction industry makes a significant contribution to global CO
2 emissions. Material extraction, processing, and demolition account for most of its environmental impact. As a response, there is an increasing interest in developing and implementing innovative biomaterials that support a circular economy, such as mycelium-based composites. The mycelium is the network of hyphae of fungi. Mycelium-based composites are renewable and biodegradable biomaterials obtained by ceasing mycelial growth on organic substrates, including agricultural waste. Cultivating mycelium-based composites within molds, however, is often wasteful, especially if molds are not reusable or recyclable. Shaping mycelium-based composites using 3D printing can minimize mold waste while allowing intricate forms to be fabricated. In this research, we explore the use of waste cardboard as a substrate for cultivating mycelium-based composites and the development of extrudable mixtures and workflows for 3D-printing mycelium-based components. In this paper, existing research on the use of mycelium-based material in recent 3D printing efforts was reviewed. This review is followed by the MycoPrint experiments that we conducted, and we focus on the main challenges that we faced (i.e., contamination) and the ways in which we addressed them. The results of this research demonstrate the feasibility of using waste cardboard as a substrate for cultivating mycelia and the potential for developing extrudable mixtures and workflows for 3D-printing mycelium-based components. [ABSTRACT FROM AUTHOR]- Published
- 2023
- Full Text
- View/download PDF
35. Effect of Aqueous Adhesives on Color Performance of Paper-based 3D Printing.
- Author
-
Zhaohui Yu, Guangxue Chen, Chen Chen, and Liuxi He
- Subjects
ADHESIVES ,COLOR vision ,THREE-dimensional printing - Abstract
The paper aims to study the effect of aqueous adhesives on color performance of paper-based 3D printing. Sixty-four color cubes of 3D Color Puzzle were printed in Matrix 300A, whose L*a*b* color values on six faces were measured before and after all the faces of the 64 cubes were coated with aqueous adhesives. Before the coating operation, the color differences between the upper and the lower surfaces on the 64 cubes were all below 2.84 NBS, and the color differences between two of four side faces were all below 2.88 NBS. However, the color differences between the front and the side were large, with a maximum of up to 32.53 NBS; After the coating operation, the average color difference between the upper and the lower surfaces of the 64 color cubes was 1.60 NBS, and the maximum was 4.92 NBS, the average color difference between two of four side faces was 1.97 NBS, and the maximum was 4.61 NBS. However, the color differences between the front and the side were greatly reduced, with an average value of 4.02 NBS, and a maximum value of 6.03 NBS. Moreover, the average color difference between the front on 64 color cubes before and after the coating operation was 2.59 NBS, with a maximum of 3.57 NBS. Relative to the effect on the side, aqueous adhesives had a minimal effect on the front. The coating operation could reduce the gap of the color difference between the front and the side, thereby ensuring a more realistic 3D color reproduction and color accuracy control. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
36. Editorial: Current Advances in Soft Robotics: Best Papers From RoboSoft 2018
- Author
-
D. P. Thrishantha Nanayakkara, Helmut Hauser, Fumiya Iida, Perla Maiolino, and S. M. Hadi Sadati
- Subjects
Technology ,Computer science ,lcsh:Mechanical engineering and machinery ,continuum manipulator ,Soft actuator ,soft actuator ,Soft robotics ,Mechanical engineering ,3D printing ,fiber jamming ,lcsh:QA75.5-76.95 ,Artificial Intelligence ,growing ,0801 Artificial Intelligence and Image Processing ,lcsh:TJ1-1570 ,soft sensor ,learning-based modeling ,Science & Technology ,Variable stiffness ,business.industry ,Robotics ,Soft sensor ,Computer Science Applications ,0906 Electrical and Electronic Engineering ,Bellows ,soft robot ,lcsh:Electronic computers. Computer science ,Current (fluid) ,business ,Actuator - Published
- 2020
- Full Text
- View/download PDF
37. 3D Printed Paper-Based Microfluidic Analytical Devices
- Author
-
Qing Gao, Jing Nie, Jianzhong Fu, Yong He, and Wu Wenbin
- Subjects
3d printed ,Materials science ,Fabrication ,Capillary action ,lcsh:Mechanical engineering and machinery ,Microfluidics ,3D printing ,Nanotechnology ,02 engineering and technology ,Substrate (printing) ,flow speed programming ,01 natural sciences ,Article ,chemistry.chemical_compound ,lcsh:TJ1-1570 ,Electrical and Electronic Engineering ,Polydimethylsiloxane ,business.industry ,Mechanical Engineering ,010401 analytical chemistry ,Paper based ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,chemistry ,Control and Systems Engineering ,paper-based microfluidic analytical devices (μPADs) ,0210 nano-technology ,business - Abstract
As a pump-free and lightweight analytical tool, paper-based microfluidic analytical devices (μPADs) attract more and more interest. If the flow speed of μPAD can be programmed, the analytical sequences could be designed and they will be more popular. This reports presents a novel μPAD, driven by the capillary force of cellulose powder, printed by a desktop three-dimensional (3D) printer, which has some promising features, such as easy fabrication and programmable flow speed. First, a suitable size-scale substrate with open microchannels on its surface is printed. Next, the surface of the substrate is covered with a thin layer of polydimethylsiloxane (PDMS) to seal the micro gap caused by 3D printing. Then, the microchannels are filled with a mixture of cellulose powder and deionized water in an appropriate proportion. After drying in an oven at 60 °C for 30 min, it is ready for use. As the different channel depths can be easily printed, which can be used to achieve the programmable capillary flow speed of cellulose powder in the microchannels. A series of microfluidic analytical experiments, including quantitative analysis of nitrite ion and fabrication of T-sensor were used to demonstrate its capability. As the desktop 3D printer (D3DP) is very cheap and accessible, this device can be rapidly printed at the test field with a low cost and has a promising potential in the point-of-care (POC) system or as a lightweight platform for analytical chemistry.
- Published
- 2016
38. A Bioinspired Hierarchical Fast Transport Network Boosting Electrochemical Performance of 3D Printed Electrodes.
- Author
-
Zhao, Bo, Wu, Jiawen, Liang, Zhiqiang, Liang, Wenkai, Yang, He, Li, Dan, Qin, Wei, Peng, Meiwen, Sun, Yinghui, and Jiang, Lin
- Subjects
ELECTRODES ,ELECTROCHEMICAL electrodes ,CARBON fibers ,ENERGY conversion ,CARBON paper ,CARBON nanotubes - Abstract
Current 3D printed electrodes suffer from insufficient multiscale transport speed, which limits the improvement of electrochemical performance of 3D printed electrodes. Herein, a bioinspired hierarchical fast transport network (HFTN) in a 3D printed reduced graphene oxide/carbon nanotube (3DP GC) electrode demonstrating superior electrochemical performance is constructed. Theoretical calculations reveal that the HFTN of the 3DP GC electrode increases the ion transport rate by more than 50 times and 36 times compared with those of the bulk GC electrode and traditional 3DP GC (T‐3DP GC) electrode, respectively. Compared with carbon paper, carbon cloth, bulk GC electrode, and T‐3DP GC electrode, the HFTN in 3DP GC electrode endows obvious advantages: i) efficient utilization of surface area for uniform catalysts dispersion during electrochemical deposition; ii) efficient utilization of catalysts enables the high mass activity of catalysts and low overpotential of electrode in electrocatalytic reaction. The cell of 3DP GC/Ni‐NiO||3DP GC/NiS2 demonstrates a low voltage of only 1.42 V to reach 10 mA cm−2 and good stability up to 20 h for water splitting in alkaline conditions, which is superior to commercialized Pt/C||RuO2. This work demonstrates great potential in developing high‐performance 3D printed electrodes for electrochemical energy conversion and storage. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
39. Impact of additive manufacturing on maritime transportation: a review
- Author
-
Teweldebrhan, Biniam Tekle, Maghelal, Praveen, and Galadari, Abdulla
- Published
- 2022
- Full Text
- View/download PDF
40. Investigating contingent adoption of additive manufacturing in supply chains
- Author
-
Patil, Himali, Niranjan, Suman, Narayanamurthy, Gopalakrishnan, and Narayanan, Arunachalam
- Published
- 2023
- Full Text
- View/download PDF
41. Effects of a poly(hydroxyalkanoate) elastomer and kraft pulp fibres on biocomposite properties and three-dimensional (3D) printability of filaments for fused deposition modelling.
- Author
-
Rodríguez-Fabià, Sandra and Chinga-Carrasco, Gary
- Subjects
THREE-dimensional printing ,PAPER industry ,FOSSILS ,TENSILE strength ,LACTIC acid - Abstract
Three-dimensional (3D) printing is a useful technique that allows the creation of objects with complex structures by deposition of successive layers of material. These materials are often from fossil origin. However, efforts are being made to produce environmentally friendly materials for 3D printing. The addition of lignocellulosic fibres to a polymer matrix is one of the alternatives to replace, for instance, glass fibres in composites as reinforcing materials. The fields of biocomposites and 3D printing open innovative application areas for pulp fibres from the pulp and paper industry. In this work, biocomposites of poly(lactic acid) (PLA), poly(hydroxyalkanoate) (PHA) and kraft pulp fibres were prepared in order to find a suitable formulation for filaments for 3D printing. The effect of two different types of kraft fibres (bleached (B) and unbleached (U)) and of PHA on the mechanical and thermal properties of the biocomposites was assessed. The addition of 30% kraft fibres to PLA resulted in an increase of the tensile modulus from 3074 to ~4800 MPa. In the case of biocomposites containing PHA (50% PLA/20% PHA/30% kraft) the increase in modulus was more moderate (PLA + PHA + U: 3838 MPa, and PLA + PHA + B: 3312 MPa). The tensile strength of PLA (66 MPa) increased to 77 MPa in PLA + kraft biocomposites, while a reduction in strength was observed for PLA + PHA + U (43 MPa) and PLA + PHA + B (32 MPa). Filaments prepared with PLA, PHA and bleached and unbleached pulp fibres showed similar printability of complex geometries, demonstrating that unbleached pulp fibres could also be utilized in the preparation of biocomposites with good mechanical performance and 3D printing properties. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
42. Upply Of Machines Like Vertical Machining Centre With 4th Axis, 3d Printing Machine, Paper Cutting
- Subjects
Paper machines ,3D printing ,Business, international - Abstract
Tenders are invited for supply of Machines like Vertical Machining Centre with 4th Axis, 3D Printing Machine, Paper Cutting Machine, Perfect Binding, Weighing Balance and Weights, Optical Emmission Spectrometer, UPS [...]
- Published
- 2017
43. 3D printing: as fun as solving 2D printing's paper jams has been, it can't compete with the geeky joy of rendering in the third dimension. Here's how to take your first steps--starting with a homemade 3D printer
- Subjects
3D printing ,Consumer news and advice - Abstract
THE KIT PRINTRBOT SIMPLE METAL KIT [pounds sterling]475/robosavvy.com * Congratulations! You've just bought a 3D printer. The only thing standing between you and geek glory is a four-hour build of [...]
- Published
- 2015
44. 3D Printing of Ionogels with Complementary Functionalities Enabled by Self‐Regulating Ink.
- Author
-
Huang, Jiahui, Yu, Zhenchuan, and Wu, Peiyi
- Subjects
THREE-dimensional printing ,YOUNG'S modulus ,INK ,ELECTRONIC paper ,VISCOELASTIC materials - Abstract
Shaping soft and conductive materials into sophisticated architectures through 3D printing is driving innovation in myriad applications, such as robotic counterparts that emulate the synergic functions of biological systems. Although recently developed multi‐material 3D printing has enabled on‐demand creation of intricate artificial counterparts from a wide range of functional viscoelastic materials. However, directly achieving complementary functionalities in one ink design remains largely unexplored, given the issues of printability and synergy among ink components. In this study, an easily accessible and self‐regulating tricomponent ionogel‐based ink design to address these challenges is reported. The resultant 3D printed objects, based on the same component but with varying ratios of ink formulations, exhibit distinct yet complementary properties. For example, their Young's modulus can differ by three orders of magnitude, and some structures are rigid while others are ductile and viscous. A theoretical model is also employed for predicting and controlling the printing resolution. By integrating complementary functionalities, one further demonstrates a representative bioinspired prototype of spiderweb, which mimics the sophisticated structure and multiple functions of a natural spiderweb, even working and camouflaging underwater. This ink design strategy greatly extends the material choice and can provide valuable guidance in constructing diverse artificial systems by 3D printing. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
45. Paper call
- Subjects
Embassy Suites Inc. ,Rubber ,Hotels and motels -- United States ,Tire industry ,Polymer industry ,Elastomers ,3D printing ,Sustainable development ,Polymers ,Business ,Chemicals, plastics and rubber industries - Abstract
Rubber Division, American Chemical Society. The deadline for the call for abstracts has been extended by the Rubber Division, ACS, for the 197th Technical Meeting, to be held April 28-30, [...]
- Published
- 2019
46. A facile technique to develop conductive paper based bioelectrodes for microbial fuel cell applications.
- Author
-
U S, Jayapiriya, Inoue, Shuhei, and Goel, Sanket
- Subjects
- *
MICROBIAL fuel cells , *ENERGY harvesting , *OPEN-circuit voltage , *ELECTRONIC equipment , *CARBON electrodes , *POWER density , *FUEL cells - Abstract
Electronic devices with multifunctional capabilities is forever an attractive area with diverse scope including towards developing solutions to sustainable energy technology. Microbial biofuel cells (MiBFCs) are one such sustainable energy technology based electronic device which can not only harvest energy, but can perform biosensing leading to bioremediation. However, low energy yield, costly fabrication procedures and bulky devices are some of the limitations of such MiBFCs. In this work, for the first time a simple vacuum filtration fabrication technique is used for making thin and conductive electrodes with homogeneous CNT solution for MiBFC application. The fully paper-based MiBFC is integrated into a compact micro device with 3D printed components which adds novelty to the work. The MiBFC is capable of maintaining a stable open circuit voltage of 410 mV for more than 1 h and can deliver a maximum power density of 192 μW/cm2 which is reasonably high for such paper-based MiBFCs operating with micro-volume of substrate. This device will help in developing more freestanding power sources for instant diagnostics and data transfer. • A simple vacuum technique was used to prepare carbon electrodes on paper. • The fabricated cost-effective electrodes were used for microbial fuel cell (MFC). • Oxygen reduction reaction on the cathode was enhanced with MnO 2 nanoparticles. • A 3D printed device was fabricated to enclose the MFC. • The MFC delivered a power density of 192 μW/cm2 for more than an hour. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
47. Switchover to industrial additive manufacturing: dynamic decision-making for problematic spare parts
- Author
-
Akmal, Jan Sher, Salmi, Mika, Björkstrand, Roy, Partanen, Jouni, and Holmström, Jan
- Published
- 2022
- Full Text
- View/download PDF
48. Supply chain design for industrial additive manufacturing
- Author
-
Friedrich, Anne, Lange, Anne, and Elbert, Ralf
- Published
- 2022
- Full Text
- View/download PDF
49. Five Secret Costs of 3D Print Post-Processing: The benefits of 3D printing can't be denied, but a new white paper reveals that once the mold is printed and post-processing begins, you may be paying for more than you bargained for
- Author
-
Hitch, John
- Subjects
Market research ,3D printing ,Marketing research ,Business ,Engineering and manufacturing industries - Abstract
When Frank Marangell, an experienced 3D printing executive, was researching whether to join a startup Rize, Inc., he realized the innovative technological and materials approach to rapid prototyping excelled in [...]
- Published
- 2016
50. The impact of 3D printing implementation on stock returns : A contingent dynamic capabilities perspective
- Author
-
Lam, Hugo K.S., Ding, Li, Cheng, T.C.E., and Zhou, Honggeng
- 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.