Additive Manufacturing
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2025
·
IF 11.1
Yazhou Peng,Wenyue Zhao,Zhao Wang,Lei Shi,Wenjing Hua,Xiaoxia Yang,Jie Wang,Weidong Fei,Yu Zhao,Changhong Wang
Three-dimensional (3D) printing of silica glass provides significant advantages for the fabrication of silica glass with complex structures. However, auxiliary support structures are generally needed due to the low stiffness and strength of green parts, which limits the flexibility of the structure design. It is imperative to increase the strength of the green part and remove the support structures for improving the molding capacity and printing quality. This study introduces an approach for 3D printing of silica glass with complex structures by digital light processing (DLP) based on the high-strength green parts, which exhibits superior molding capacity. By comparing three monomers of 2-hydroxyethyl methacrylate (HEMA), 2-hydroxyethyl acrylate (HEA), and 4-hydroxybutyl acrylate (4-HBA), it was demonstrated that high photopolymerization reactivity is a key factor for improving the mechanical properties of green parts. Green parts printed with 4-HBA exhibit a combination of high modulus, high strength, and high conversion degree. Following heat treatment, these complex-structured green parts transform into dense, transparent silica glass. The specific compressive strength of silica glass with a lattice meta-structure reaches 4.94 × 10 4 N m kg −1 . This study enhances structural design flexibility in the 3D printing of silica glass, providing a novel perspective for future research.
研究领域:
材料科学
·
光学工程
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产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2023
·
IF 3
Yujie Yang,Xin Xu,Zhiqiang Li,Xinle Yao,Dongqing Kang,Yaozhong Lu,Yanbin Wang,Yuxiong Guo,Xiaolong Wang
Conventional benzoxazine is difficult for molding and manufacturing parts with complex structures, shaped thin walls, etc. In this work, we presented a new method of synthesizing vat photopolymerization 3D printable benzoxazine inks were proposed to produce high precision constructions with low shrinkage. A creative benzoxazine monomer with excellent printability was synthesized by 2,2′-bis(trif luoromethyl)-4,4′-diaminobiphenyl (TFDB) and Bisphenol AF grafting with isocyanoethyl methacrylate (IEM). Specially, the solvent-free benzoxazine inks have ultra-low shrinkage, line shrinkage up to 1.8%. Minimum printable feature size of 300 µm. This study has solved the problem of benzoxazine being too brittle to be machining. It can be used in aerospace and copper laminate applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Fenglong Li,Xiaolin Wang,Jiyang Zuo,Chao Chen,Jing Chen,Jin Zhu,Wu Bin Ying
3D printing has emerged as a highly accurate, highly customizable, and low-cost fabrication method to realize structures with designed geometry. However, the integral printing of complex structures, such as suspended structures, still poses significant challenges in the most commonly used 3D printing technology-fused filament fabrication (FFF). Therefore, designing a self-healing material, segmenting the printing of complex structures, and finally assembling them into a whole by the self-healing capability are expected to resolve this issue. In this research, we successfully synthesized a self-healing polyurethane (LNPU-3) with the introduction of dynamic oxime-urethane bonds. Specifically, we employed polycaprolactone diol as the soft segment, 2,4-pentanedione dioxime as the chain extender, and 4,4′-methylenebis(phenyl isocyanate) as the hard segment. LNPU-3 exhibited outstanding mechanical properties, with a tensile stress of 8.5 MPa and a fracture toughness of 20.1 MJ/m3. Even after cyclic stretching five times at a strain of 30%, the specimen could still recover 95% of its original value. Furthermore, LNPU-3 could be fully self-healed at room temperature (25 °C) within 8 h, with a healing efficiency of 92.9%. Finally, LNPU-3 was successfully printed by using FFF and the self-healing capability of the printed samples was tested. The printing components were then assembled into a complex structure that was difficult to print as a whole. In summary, LNPU-3 is an ideal self-healing 3D printing material, demonstrating significant potential for the application of self-healing materials and the advancement of 3D printing technology.
研究领域:
材料科学
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化学工程
·
3D打印技术
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产品关联
DOI
高影响因子
Virtual and Physical Prototyping
·
2023
·
IF 10.6
Xiangbin Zeng,Zijie Meng,Zhennan Qiu,Jiankang He,Jinhai Fan,Dichen Li
We developed a novel melt-based embedded printing strategy to fabricate polycaprolactone (PCL) structures with complex overhanging geometries within a thermally stable supporting matrix. By optimising the concentration of the supporting matrix, process parameters, and inter-filament thickness, continuous PCL filaments can be stably printed with the smallest width of 50.6 ± 4.7 μm. The one-step in situ post-solidification process provides a unique approach to regulate the surface morphology of the printed filaments, and reduce structural anisotropy. Various 3D structures with overhanging geometries, such as truss structures and flexible scaffolds were successfully fabricated by melt-based embedded printing. The effective modulus of the printed flexible PCL scaffolds can be widely tuned in the range of 867.4 ± 21.6 to 9.1 ± 1.2 kPa by adjusting the design parameters. We envision that the presented strategy might provide an innovative tool to fabricate flexible polymeric scaffolds with complex structural organisations for soft tissue engineering.
研究领域:
生物材料学
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医学工程
·
再生医学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Yu Kang,Ludi Wang,Yaoyang Liu,Runquan Shi,Xiaoyan Tang,Li Wang
Efficient and selective sensing of lanthanides are crucial for identifying valuable lanthanide streams and designing effective extraction/masking agents for mining and nuclear waste management. Luminescence-based sensing often struggles with interference from water molecules. Common approaches to improve emissive lanthanide complexes in water involve increasing ligand lipophilicity and enclosing the emitting metal center. Herein, we have demonstrated that lipophilic ligands do not always lead to higher emissions. When strong coordinating groups are involved in the ligand, the complex may adapt special architecture to compensate the hydrophilic nature of the ligand by creating lipophilic microenvironment and lead to higher emissions. Our findings highlight the importance of the overall lipophilicity of both the ligand and the final complex, which could serve as important reference for future design of efficient lanthanide sensing and emissive complexes.
研究领域:
化学
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材料科学
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环境科学
✓ 已验证
DOI
高影响因子
Advanced Science
·
2024
·Vol. 11
·期 23
·2309171
·
IF 14.3
Xuefeng Zhang,Xudong Liu,Qingqiang Liu,Yufa Feng,Si Qiu,Ting Wang,Huayu Xu,Hao Li,Liang Yin,Hui Kang,Zhimin Fan
Enabling materials to undergo reversible dynamic transformations akin to the behaviors of living organisms represents a critical challenge in the field of material assembly. The pursuit of such capabilities using conventional materials has largely been met with limited success. Herein, the discovery of reversible constrained dissociation and reconfiguration in MXene films, offering an effective solution to overcome this obstacle is reported. Specifically, MXene films permit rapid intercalation of water molecules between their distinctive layers, resulting in a significant expansion and exhibiting confined dissociation within constrained spaces. Meanwhile, the process of capillary compression driven by water evaporation reinstates the dissociated MXene film to its original compact state. Further, the adhesive properties emerging from the confined disassociation of MXene films can spontaneously induce fusion between separate films. Utilizing this attribute, complex structures of MXene films can be effortlessly foamed and interlayer porosity precisely controlled, using only water as the inducer. Additionally, a parallel phenomenon has been identified in graphene oxide films. This work not only provides fresh insights into the microscopic mechanisms of 2D materials such as MXene but also paves a transformative path for their macroscopic assembly applications in the future.
研究领域:
材料科学
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纳米技术
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产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-10
·
IF 16.6
Sun Yuxuan,Wang Liu,Ni Yangyang,Zhang Huajian,Cui Xiang,Li Jiahao,Zhu Yinbo,Liu Ji,Zhang Shiwu,Chen Yong,Li Mujun
Thermosets such as silicone are ubiquitous. However, existing manufacturing of thermosets involves either a prolonged manufacturing cycle (e.g., reaction injection molding), low geometric complexity (e.g., casting), or limited processable materials (e.g., frontal polymerization). Here, we report an in situ dual heating (ISDH) strategy for the rapid 3D printing of thermosets with complex structures and diverse rheological properties by incorporating direct ink writing (DIW) technique and a heating-accelerated in situ gelation mechanism. Enabled by an integrated Joule heater at the printhead, extruded thermosetting inks can quickly cure in situ, allowing for DIW of various thermosets with viscosities spanning five orders of magnitude, printed height over 100 mm, and high resolution of 50 μm. We further demonstrate DIW of a set of heterogenous thermosets using multiple functional materials and present a hybrid printing of a multilayer soft electronic circuit. Our ISDH strategy paves the way for fast manufacturing of thermosets for various emerging fields.
研究领域:
材料科学
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制造技术
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Jing Men,Guojie Zhang,Junzong Feng,Yonggang Jiang,Liangjun Li,Yijie Hu,Jian Feng
The evolving aircraft technology have spurred an urgent need for carbon aerogel thermal insulation composites with intricate structures, which require good near net-shape forming capability and excellent mechanical and thermal insulation properties. However, large shrinkage and thermal conductivity often undermine these properties. Herein, the near net-shape carbon aerogel composite with complex structure was prepared by using pre-carbonized phenolic fibers as reinforcement and chitosan-added carbon aerogels as matrix. Thanks to the polymerization and hydrogen bonding between chitosan and resorcinol-formaldehyde oligomers, the strength of the gel network is enhanced and the shrinkage is reduced, which in turn effectively alleviates the shrinkage stress of the composite, resulting in a composite with an intact structure. In addition, due to the zero shrinkage and low intrinsic thermal conductivity of the pre-carbonized phenolic fiber and the typical mesoporous structure of the chitosan-added carbon aerogel, the composite (0.337 g/cm 3 ) has a low pyrolysis shrinkage (as low as 7.47%), low thermal conductivity (0.241 W/m·K at 1200 °C), and high compressive strength (17.75 MPa). Notably, compared to the composite prepared by the co-shrinkage strategy with similar density and thermal conductivity, our composite demonstrates significantly reduced pyrolysis shrinkages of 97.95% and 72.14% in the X-Y and Z directions, respectively. This study presents a groundbreaking method for producing carbon aerogel composites that excel in near net-shape forming and thermomechanical properties, advancing the development of high-performance complex thermal insulation components for diverse applications.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Ruiguang Chen,Qin Lian,Dichen Li,Xiaoning He,Shuaiwei Wang,Jian Zhuang
Diamond/SiC composites with high thermal conductivity are important materials for electronic industry, especially electronic packaging, but their complex structures and high-precision manufacturing are still challenging issues. Stereolithography-based manufacturing method combined with the reactive melt infiltration to make diamond/SiC composites with high-precision complex structures has been proposed in this paper. Diamond particles were used as the raw material, and as the particle size is a key factor affecting composite performance its influence was studied by means of measuring parameters, examining microstructure, and detecting components, whereas related mechanisms are discussed as necessary. Subsequently, a diamond/SiC composite with the thermal conductivity of 245.68 W/(m K) has been prepared and used in experiment. The experiment shows that the precision is affected by light-scattering and bending in the printing plane and in the vertical plane respectively, with the size errors of 0.25 and 0.12 mm.
研究领域:
材料科学
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增材制造
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Weigang Ma,Chuanmin Wang,Xinran Wang,Xinyi Zhou,Ya Lu,Xin Guo,Nguyen-Minh-An Tran,Junsheng Yang,Huabin Yang,Danyang Wang,Hua Tan,Haibo Zhang
The vat photopolymerization (VPP) technology offers exceptional flexibility in design and manufaction of high-performance piezoceramic structures. However, due to the high refractive index and strong UV absorption characteristics of Pb-based ceramics, ceramic slurries are required to have a low solid content in for efficient deep-curing. This limitation often results in sintering distortion, cracking, low density, and deteriorated piezoelectric properties. To address these challenges, a heat treatment process was initially employed to spheroidize the PZT powder, which effectively decreased light scattering and absorption. Subsequently, high-refractive-index and highly reactive photosensitive resins were introduced to enhance the penetration of UV light and reduce the critical exposure energy of the slurry. Additionally, a hindered amine light stabilizer is added to capture the peroxy radicals to overcome the oxygen inhibition effect and further increase the curing depth. As a result, a PZT slurry with a high solid content of 45 vol.%, was successfully formulated, facilitating the manufacturing of PZT ceramics with complex structures. The sintered samples achieved a high relative density of 96.5% and a d 33 value of 573 pC/N. These optimized strategies provide a solid foundation for the development of high-performance PZT devices with intricate geometries.
研究领域:
材料科学
·
陶瓷
·
增材制造
·
光聚合
·
压电材料
✓ 已验证
产品关联
DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2024
·
IF 11
Ruiling Li,Ningzhe Wang,Chao Ma,Jiacheng Wang,Jing Wang,Xin Yang
With the development of the intelligent direction of food 3D printing, people have a strong aesthetic interest in food printing prototypes. In order to investigate the ability of food-based materials to print complex structures and fine patterns simultaneously, three phase-change hydrocolloids with different mechanical strengths after cooling were selected: xanthan gums (Xg), low acyl gellan gums (Gg), and starches (Ss) with ovalbumin to form Xg-ovalbumin emulsion gel (Xg-OEG), Gg-ovalbumin emulsion gel (Gg-OEG), and Ss-ovalbumin emulsion gel (Ss-OEG), respectively. Ss-OEG printed fine patterns with a minimum size of 1.5 mm accurately at a Ss concentration of 1.5%, and was able to print suspended structures, had continuous filament strips and tight layer-to-layer stacking, with the ability to print complex structures and fine patterns simultaneously. Compared with Xg-OEG and Gg-OEG, Ss-OEG had high viscoelasticity and mechanical strength, suitable fluidity, small size of oil droplets without aggregation, dense network structure, and high surface hydrophobicity and amide A peak intensity and the low free sulfhydryl content. Thus, Ss endowed OEG with a certain viscoelasticity and mechanical strength, and caused massive aggregation of proteins through forming disulfide bonds, hydrophobic interactions, and hydrogen bonds. Aggregated ovalbumin and Ss formed a stable and strong network structure, emulsified oil droplets filled in the network, the three tightly crosslinked together to form an emulsion gel with excellent printing ability. This research offered the possibility of simultaneously printing complex structures, high-resolution patterns using food-based materials, also providing a theoretical basis for the design of complex and fine printed products.
研究领域:
食品科学
·
材料科学
·
生物技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）