PHOTOCHEMISTRY AND PHOTOBIOLOGY
·
2019
·Vol. 95
·期 5
·1219-1229
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IF 2.338
Zhiquan Li,Chong Wang,Wanwan Qiu,Ren Liu
Designing digital light processing (DLP) 3D printable photosensitive resins with antibacterial properties is especially vital because of their potential applications in various biomedical fields. In this contribution, a thiol–ene–acrylate ternary system with reduced volume shrinkage and fast photopolymerization rate was chosen as the antibacterial 3D printing matrix resin. Two quaternary ammonium salt-type antibacterial agents (QAC and SH-QAC) with different molecular weight were designed and prepared, which can participate in the curing of matrix resin to achieve contact antibacterial effect. The effects of antibacterial agent content on the photopolymerization kinetics and on thermal and mechanical properties were discussed in detail. When the amount of added QAC is 4wt%, the antibacterial rate is almost 100% for Escherichia coli and Staphylococcus aureus , and when the amount of SH-QAC is 10wt%, the antibacterial rate against S. aureus is also essentially 100%. Both antibacterial photosensitive resins have been successfully applied in DLP technology to fabricate tooth model with high precision.
研究领域:
材料科学
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生物医学工程
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DOI
高影响因子
International Journal of Minerals Metallurgy and Materials
·
2025
·Vol. 32
·期 5
·1220-1233
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IF 7.2
Qin Qing,Xiong Gang,Han Lin,Zhang Yujuan,Shen Zhen,Ge Changchun
Digital light processing (DLP) is a crucial additive manufacturing (AM) technique for producing high-precision ceramic components. This study aims to optimize the formulation of Si 3 N 4 slurry to enhance both its performance and manufacturability in the DLP process, and investigate key factors such as particle size distribution, photopolymer resin monomer ratios, and dispersant types to improve the slurry’s rheological properties. Through these optimizations, a photosensitive Si 3 N 4 slurry with 50vol% solid content was developed, exhibiting excellent stability, and low viscosity (2.48 Pa·s at a shear rate of 12.8 s −1 ). The effects of gas-pressure sintering on the material’s phase composition, microstructure, and mechanical properties were further explored, revealing that this technique significantly increases the flexural strength of the green sample from (109 ± 10.24) to (618 ± 42.15) MPa. The sintered ceramics exhibited high hardness ((16.59 ± 0.05) GPa) and improved fracture toughness ((4.45 ± 0.03) MPa·m 1/2 ). Crack trajectory analysis revealed that crack deflection, crack bridging, and the pull-out of rod-like β-Si 3 N 4 grains, are the main toughening mechanisms, which could effectively mitigate crack propagation. Among these mechanisms, crack deflection and bridging were particularly influential, significantly enhancing the fracture toughness of the Si 3 N 4 matrix. Overall, this research highlights how monomer formulation and gas-pressure sintering strengthen the performance of Si 3 N 4 slurry in the DLP three-dimensional printing technique. This work is expected to provide new insights for fabricating complex Si 3 N 4 ceramic components with superior mechanical properties.
研究领域:
材料科学
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陶瓷制造
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增材制造
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Sa Liu,Lina Mo,Gangyuan Bi,Shenggui Chen,Diwei Yan,Junzhong Yang,Yong-Guang Jia,Li Ren
Digital light processing (DLP) 3D printing has been utilized to fabricate controlled porous β-tricalcium phosphate (β-TCP) scaffolds, which promote cell adhesion and angiogenesis during bone regeneration. However, the current limitation of DLP 3D printing for the fabrication of β-TCP scaffold is how to prepare a low viscosity ceramic slurry and remove the toxicity of residual non-polymerized slurry. The present study has developed a low viscosity ceramic slurry system by mixing β-TCP with photosensitive acrylate resin, and the viscosity of slurry is about 3 Pa s and the solid content of β-TCP can be as high as 60 wt%. After optimizing the ratio of slurry, printing, degreasing and sintering processes, the maximum compressive strength of the DLP printed scaffolds reaches up to 9.89 MPa, while the porosity keeps ca. 40%. According to the proliferation of cells, it confirms the preserved biocompatibility of DLP-fabricated β-TCP scaffolds. These porous scaffolds made by DLP 3D printing technology is of great significance for bone regeneration, and will also help to expand the application of DLP technology in biomedical field.
研究领域:
生物材料学
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组织工程学
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医学工程
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产品关联
DOI
高影响因子
International Journal of Applied Ceramic Technology
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2025
·
IF 2.3
Yang Liu,Ruixue Sun,Jianmin Han
Calcium silicate (CaSiO 3 , CS) bioceramic has received widespread attention in the field of bone repair due to its excellent bone conductivity, osteoinductivtiy, and degradability. In this study, the porous CS scaffold was firstly prepared by digital light processing (DLP) 3D printing. The effects of solid loading, pore size, and sintering temperature on the compressive strength, porosity and shrinkage of the CS scaffold were thoroughly investigated. When the solid loading is 35 vol.%, the pore size is 500 µm, and the sintering temperature is 1200°C, the prepared CS scaffold has high porosity (48.96 %) and high compressive strength (32.13 MPa). To solve the problems caused by the rapid degradation of CS, surface modification of the prepared CS scaffold was further conducted through in situ growth of hydroxyapatite (HAp) on its surface. A large amount of HAp nanorods homogeneously grow on the surface of the CS porous scaffold when the concentration of KH 2 PO 4 in hydrothermal solution is 0.01 mol/L. Moreover, the phase composition and morphology of HAp grown on the surface of the CS scaffold can be controlled through controlling the concentration of KH 2 PO 4 .
研究领域:
生物材料学
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骨修复研究
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Tianqi Zheng,Wei Wang,Jinxing Sun,Jing Liu,Jiaming Bai
Digital Light Processing (DLP) is a promising approach to fabricate delicate ceramic components with high-fidelity structural features. In this work, the alumina and zirconia/alumina ceramic suspensions with low viscosity and high solid loading (40 vol%) were prepared specifically for DLP 3D printing . After debinding and sintering, the final parts were obtained without any defects. The surface morphologies and mechanical properties of alumina (Al 2 O 3 ) and zirconia toughened alumina (ZTA) composites were investigated and the results showed that the final parts exhibited high relative densities and good interlayer combination at the sintering temperature of 1600 °C. Comparing with the Al 2 O 3 , the ZTA composites exhibited significantly enhanced density (99.4%), bending strength (516.7 MPa) and indentation fracture toughness (7.76 MPa m 1/2 ).
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
DOI
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Zhenxiang Wang,Yunlong Guo,Ruiqi Feng,Weizi Gao,Zhijie Mao,Xingye Zhang,Biao Zhang
Mixed ionic and electronic conductive hydrogels have demonstrated significant application potential in biosensing, healthcare, and other fields. However, the lack of stable conductive pathways during processing and incompatibility with advanced manufacturing techniques hinders their practical advancements. Herein, we demonstrate a mixed conductive hydrogel that can be 3D printed via Digital Light Processing (DLP), where the electronic conductive pathway is composed of PEDOT:PSS and the ionic conductive pathway is formed by the photocurable polyionic liquid (PIL) (i.e., poly(1-2-acryloyloxy-ethyl)-3-methyl-imidazolium bromide, PAEMIBr). This hydrogel exhibits excellent mixed conductivity (430 mS/m for electronic conductivity and 26 mS/m for ionic conductivity), as measured by electrochemical impedance spectroscopy (EIS), high shape-defined printing resolution (100 μm), and flexibility, with the conduction pathways of printed structures remaining uninterrupted after post-treatment (i.e., annealing and reswelling), providing insights for material design in flexible electronics and sensors.
研究领域:
材料科学
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生物传感
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先进制造
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Guoan Qi,Haihua Yao,Yong Zeng,Jimin Chen
In this study, highly loaded tin oxide-based (SnO 2 -based) porous electrodes were prepared by digital light processing (DLP) 3D printing technology. Firstly, the SnO 2 light-cured slurry was prepared. The curing process and heat treatment process were analyzed and optimized. Then the best process parameters were obtained. Antimony oxide (Sb 2 O 3 ) was selected as the conductive agent to improve the electrical conductivity of the SnO 2 -based electrode. Through the characterization of resistivity, SEM and XRD , the optimum doping amount of conductive agent Sb 2 O 3 was determined to be 6 wt. %. Three kinds of porous electrodes with different shapes were prepared by DLP 3D printing, and the printing accuracy and mechanical properties were characterized. The results showed that the forming dimension error was about 1.7 % in the X and Y direction, 2.3 % in the Z direction. And the average compressive strength was 18.1 MPa, which effectively ensured the shape integrity and mechanical stability of the printed parts. Then the electrochemical properties of DLP 3D printed SnO 2 -based electrode and conventional coated electrode were tested and compared. The results showed that the 3D printed porous electrode showed lower charge transfer impedance and higher ion diffusion efficiency, and the maximum charge transfer impedance could be reduced to 1/25 of the traditional electrode; At the same time, it showed better cycle performance and rate performance, and the capacity retention of the 3D printed porous electrode could be improved by about 29.0 % compared with the traditional electrode. This work shows that high-performance high-load porous electrodes can be accurately prepared by DLP 3D printing, which provides a new strategy for the future development of high-load thick electrodes.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS AND MANUFACTURING PROCESSES
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2022
·
IF 4.783
Jian Liu,Shufeng Xiong,Hui Mei,Zhangwei Chen
The combination of polymer-derived ceramics and DLP 3D printing has significant advantages for manufacturing special polynary ceramics with complex structures. However, a large number of the organic components in the precursor rapidly burn out and release after evaporation during pyrolysis. This leads to structural retention issues such as sample deformation, shrinkage and cracking. The surface morphology and accuracy of the sample are greatly affected by the escape of organic matter and the release of thermal stress during the pyrolysis process. Therefore, this study employs the method of adding low-melting-point silicone oil based on the original material components. The slow burn-out process of silicone oil at a lower temperature can produce fine pores, which would aid the release of thermal stress. Additionally, it can provide channels for escape of the organic gas at high-temperature, which helps to reduce large deformation and cracking and improves the surface morphology and dimensional accuracy of the final pyrolyzed samples. The method studied in this work helps to enhance the structural retention of complex-shaped polymer-derived ceramics manufactured by 3D printing and high-temperature pyrolysis, which could be beneficial to the further mass fabrication of such ceramic products.
研究领域:
材料科学
·
制造工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 9
·5348-5356
·
IF 10.7
Chuhan Song,Qian Zhao,Tao Xie,Jingjun Wu
Functional conductive hydrogels are widely used in various application scenarios, such as wearable sensors, tissue engineering scaffolds, and biosensing devices. Simultaneously achieving good conductivity and shaping versatility is still a great challenge. In this work, an inherently porous poly(N-isopropylacrylamide) (PolyNIPAm) hydrogel was constructed utilizing the principle of polymer-induced phase separation. The instantaneous heat release during the UV-initiated polymerization reaction increased the temperature of the system above the lower critical solution temperature (LCST), triggering the phase transition of the PolyNIPAm chains. Subsequently, an interconnected polypyrrole (PPy) network within the hydrogel was obtained through in situ catalytic pyrrole polymerization. The resulting hybrid hydrogel demonstrates an exceptional electrical conductivity of 264 S m−1. Moreover, this method shows good compatibility with digital light processing (DLP) 3D printing technology, enabling the conductive hydrogel to acquire tailored complex features. The conductive hydrogel is 3D printed into a lattice-like structure and used as a piezoresistive sensor. Benefiting from its 3D structure, it can maintain high sensitivity over a wide range of detectable pressures. With this remarkable advantage, this fabrication strategy may provide new opportunities to broaden the applications of conductive hydrogels.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Additive Manufacturing
·
2020
·
IF 7.002
Yu Liu,Zhangwei Chen,Junjie Li,Baoping Gong,Long Wang,Changshi Lao,Pei Wang,Changyong Liu,Yongjin Feng,Xiaoyu Wang
A flexible and integrated design and manufacturing process based on photopolymerization DLP 3D printing technology is proposed to fabricate tritium breeder units that can be used in fusion reactors. Defect-free cellular structures of lithium-enriched Li 4 SiO 4 is manufactured for the first time that can be used to replace the traditional pebble beds configuration to overcome problems resulted from stress concentration and difficulty in packing fraction improvement. As-received large Li 4 SiO 4 powder which is highly sensitive to air and ambient environment is protected and processed in inert glove box for the use in the preparation and optimization of stable photopolymerizable resin-based ceramic slurry suitable for DLP 3D printing . Appropriate debinding and sintering treatments applied result in homogeneous shrinkage and preserved features of the cellular structures, showing benefits for dimension control. The intact structures possess high phase purity and suitable and tailorable effective ‘packing fraction’ for breeding application. Mechanical tests and the obtained results compared with existing works further confirm that the cellular parts prepared in this work have advantageous performance. The unique advantage of flexible control in design and manufacturing of 3D printing may pave a promising way for greater possibilities to engineer novel tailored high-performance tritium breeder structures used in nuclear fusion technology.
研究领域:
材料科学
·
核能工程
·
先进制造
✓ 已验证
产品关联
DOI
高影响因子
Virtual and Physical Prototyping
·
2021
·
IF 8.092
Jun Zhou,Honghao Yan,Chengyun Wang,Huaqiang Gong,Qiuxiao Nie,Yu Long
Previous studies on UV-curable elastomer for digital light processing (DLP) 3D printing flexible electronics mostly focused on higher stretchability and healability, thereby ignoring rapid recoverability after a stretch which is very important for the real-time transmission of electrical signals in flexible electronics. Herein, a UV-curable elastomer is developed with a novel dynamic hierarchical crosslinking network that can be stretched up to over 800% and rapid recoverability at 300% strain. We proposed a hydrogel-elastomer assembling process to simplify the manufacturing process for stretchable conductors. The stretchable conductors served as a strain sensor exhibiting excellent stability and repeatability after 10 cycles at 20–50% strain with low signal drift and hysteresis, Moreover, the strain sensor can be utilised in recognising the different bending angles of the finger, making DLP printing of conductive elastomer a viable strategy for the rapid manufacturing of flexible electronics.
研究领域:
材料科学
·
电子工程
·
生物医学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 22
·50525
·
IF 3.125
Songyi Li,Yihua Cui,Jingjing Li
In order to lower the volume shrinkage of the DLP 3D printing photosensitive resins during printing, a thiol-terminated hyperbranched polymer (T-HBP) was synthesized and introduced into the bisphenol A epoxy acrylate (EA) based photosensitive resin system. The obtained T-HBP was characterized by FTIR and 1 H NMR spectra, and the grafting rate of sulfhydryl was determined. The mechanical properties of the photosensitive resins were measured by tensile and impact strength measurement. The glass transition temperature of the photosensitive resins was analyzed by DSC and the impact fracture surface was observed by SEM. T-HBP exhibited a much lower viscosity than its linear counterparts, and the addition of thiol improved the curing speed of the photosensitive resins. When the amount of T-HBP added was 20 wt%, the shrinkage of the photosensitive resins was reduced by about 45.5% and the impact strength increased by 33.9% compared with the control. The macromolecular spherical structure of T-HBP effectively reduced the functional group density of the photosensitive resins. In addition, the thiol-acrylate photopolymerization introduced by T-HBP further reduced the volume shrinkage of the photosensitive resins.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）