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Alumina Ceramics Fabricated by in-situ Consolidation of Pre-gelling Starch

Journal of Wuhan University of technology(materials Science) 2018年第3期33卷 758-766页

作者：朱田丽王友法 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

An in-situ consolidation method was developed and optimized to successfully fabricate alumina ceramics using pre-gelling starch. Our results showed that the obtained ceramics have more homogeneous microstructure, higher density, higher flexural strength, and favorable biocompatibility compared to the regular one. During the process, cornstarch granules swelled and deformed but no fracture was observed. After the cornstarch granules bursted, alumina particles were suspended uniformly in the three-dimensional network structure to generate a much smoother surface. Below 0.5 wt% higher cornstarch content increased the flexural strength of prepared ceramics, while above 0.5 wt% the mechanical properties were compromised. Therefore the cornstarch content of 0.5% was the optimal concentration to achieve the highest mechanical strength of the prepared ceramics, with a measured flexural strength of 341 MPa, and a relative density of 96.01%.

关键词： pre-gelling starch in-situ consolidation alumina-ceramic flexural strength biocompatibility

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NiTi alloys with simultaneous equiaxed-grain strength and columnar-grain ductility manipulated by direct energy deposition

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Journal of Alloys and Compounds 2025年 1028卷

作者： Lu, Jiaqi Zhang, Chi Liu, Yang Huang, Zhifeng Hou, Huilong Huang, Aijun Chen, Fei State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China International School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China Hubei Longzhong Laboratory Xiangyang441106 China Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou521000 China School of Materials Science and Engineering Beihang University Beijing100191 China Hangzhou310023 China Monash University Notting HillVIC3168 Australia

NiTi alloys prepared by additive manufacturing (AM) often have coarse columnar grains showing poor tensile superelasticity, strength, and ductility, significantly impairing part qualification and targeted applications. In this work, we used laser-engineered net shaping (LENS) to fabricate NiTi alloys with lamellar structures which consist of fine nearly equiaxed grains, columnar grains, and high-density dislocations, through periodically alternating processing parameters. This strategy can partially keep the equiaxed grains produced by the transformation from columnar grains to equiaxed grains (CET) at the top of the deposited layer, and interrupt the epitaxial growth of columnar grains in AM-ed NiTi alloys. The results show that NiTi alloys with lamellar structures exhibit an excellent combination of strength and ductility with a tensile strength of 649 MPa strain of 17.5 %, a maximum recovery strain of 5.3 %, and a stable recovery strain of 3.1 % after 20 cycles. Our findings may increase the range of adjustable microstructures and combinations of properties in NiTi alloys and provide a new idea for microstructure modification and reinforcement of AM shape memory alloy. © 2025 Elsevier B.V.

关键词： Tensile strain

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5H-Fluoreno [3,2-b:6,7-b’] Dithiophene Based Non-fullerene Small Molecular Acceptors for Polymer Solar Cell Application

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Journal of Wuhan University of technology(materials Science) 2019年第5期34卷 1220-1227页

作者： WU Jiansheng XIAO Shengqiang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

Two novel non-fullerene small molecule acceptors were prepared with the conjugated backbone of 5 H-fluoreno[3, 2-b:6, 7-b’] dithiophene carrying the electron deficient unit of dicyanomethylene indanone(DICTFDT) and rhodanine(TFDTBR), respectively. The two acceptors exhibited excellent thermal stability and strong absorption in the visible region. The LUMO level is estimated to be at-3.89 eV for DICTFDT and-3.77 eV for TFDTBR. When utilized as the acceptor in bulk heterojunction polymer solar cells with the polymer donor of PBT7-Th, the optimized maximum power conversion efficiency of 5.12% and 3.95% was obtained for the device with DICTFDT and TFDTBR, respectively. The research demonstrates that 5 H-fluoreno[3, 2-b:6, 7-b’] dithiophene can be an appealing candidate for constructing small molecular electron acceptor towards efficient polymer:non-fullerene bulk heterojunction solar cells.

关键词： polymer solar cells bulk heterojunction non-fullerene acceptor

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Mussel-inspired Methacrylic Gelatin-dopamine/Ag Nanoparticles/Graphene Oxide Hydrogels with Improved Adhesive and Antibacterial Properties for Applications as Wound Dressings

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Journal of Wuhan University of technology(materials Science) 2024年第2期39卷 512-521页

作者：宿正楠 HU Yanru MENG Lihui OUYANG Zhiyuan LI Wenchao ZHU Fang XIE Bin 吴庆知 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Biomedical Material and Engineering Center of Hubei ProvinceWuhan University of TechnologyWuhan 430070China

A novel strategy was developed to prepare the methacrylic gelatin-dopamine(GelMA-DA)/Ag nanoparticles(NPs)/graphene oxide(GO) composite hydrogels with good biocompatibility,mechanical properties,and antibacterial ***-inspired DA was utilized to modify the GelMA molecules,which imparts good adhesive performance to the ***,interfacial enhancer,not only improves mechanical properties of the hydrogels,but also provides anchor sites for loading Ag NPs through numerous oxygencontaining functional groups on the *** experimental results show that the GelMA/Ag NPs/GO hydrogels have good biocompatibility,and exhibit a swelling rate of 202±16%,the lap shear strength of 147±17 kPa,and compressive modulus of 136±53 kPa,in the case of the Ag NPs/GO content of 2 mg/*** activity of the hydrogels against both gram-negative and gram-positive bacteria is dependent on the Ag NPs/GO content derived from the release of Ag^(+).Furthermore,the GelMA/Ag NPs/GO hydrogels possess good adhesive ability,which is resistant to highly twisted state when stuck on the surface of *** results demonstrate promising potential of the GelMA-DA/Ag NPs/GO hydrogels as wound dressings for biomedical applications in clinical and emergent treatment.

关键词： GelMA dopamine,graphene oxide adhesion antibacterial ability

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Efficient separation of layered oxide cathode materials and Al collectors in spent lithium-ion batteries

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Journal of Cleaner Production 2025年 510卷

作者： Zhiyue Fu Weihao Zeng Juan Wang Yu Li Shichun Mu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan Hubei 430070 China

With the growing scale of the lithium-ion battery market, the number of retired lithium-ion batteries (LIBs) increase exponentially. The recycling of spent LIBs not only reduces environmental pressure but also achieves resource recycling, making the necessity of recycling indispensable. Wherein the separation of cathode active materials from current collectors is a key step in the recycling process of spent LIBs, which directly affects the recycling efficiency and the reuse value of materials. Moreover, by recycling spent LIBs and extracting valuable metals from them, it is possible to alleviate the shortage of resources and realize the sustainable economic development. Among cathode materials, layered lithium nickel cobalt manganese oxide (NCM) has the highest recycling value as it contains more valuable metals such as lithium (Li), nickel (Ni), cobalt (Co) and manganese (Mn). Therefore, in this review we mainly summarize and analyze the latest research progress in the field of NCM cathode material separating from aluminum (Al) foil by focusing on its methods, principles, advantages and limitations. Also, it provides solutions to existing challenges, which have important reference significance to promote the sustainable recycling and use of spent LIBs.

关键词： Electrode separation Layered oxide cathode material Resource recovery Spent lithium-ion batteries

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Effect of Molecular Weight on Thermoelectric Performance of P3HT Analogues with 2-Propoxyethyl Side Chains

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Journal of Wuhan University of technology(materials Science) 2024年第2期39卷 268-281页

作者：董得福 WANG Wei ZHAN Chun LI Chenglong ZHOU Qisheng 肖生强 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

By replacing hexyl chains in poly(3-hexylthiophene)(P3HT)with 2-propoxyethyls,four poly(3-(2-propoxyethyl)thiophene)(P3POET)homopolymers with comparable polydispersity indexes(PDI)and regioregularities were prepared herein in addition with step increment of about 7 kDa on numberaverage molecular weight(M_(n))from around 11 to 32 kDa(accordingly denoted as P11k,P18k,P25k,and P32k).When doped in film by FeCl_(3)at the optimized conditions,the maximum power factor(PF_(max))increases greatly from 4.3μW·m^(-1)·K^(-2)for P11k to 8.8μW·m^(-1)·K^(-2)for P18k,and further to 9.7μW·m^(-1)·K^(-2)for P25k,followed by a slight decrease to 9.2μW·m^(-1)·K^(-2)for *** close Seebeck coefficients(S)at PF_(max)are observed in these doped polymer films due to their consistent frontier orbital energy levels and Fermi *** main contribution to this PF_(max)evolution thus comes from the corresponding conductivities(σ).Theσvariation of the doped films can be rationally correlated with their microstructure evolution.

关键词： conjugated polymer molecular weight microstructure thermoelectric performance

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A novel, green method for the preparation of biodegradable PLA membranes without pore-forming agent

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Journal of Water Process Engineering 2025年 74卷

作者： Cai, Jiayi Han, Zunbo Sun, Yinjie Chen, Haoran Li, Haoran Wang, Ruoxi Ji, Yanhong He, Benqiao State Key Laboratory of Separation Membranes and Membrane Processes School of Material Science and Engineering Tiangong University Tianjin 300387 China Cangzhou Institute of Tiangong University Cangzhou 061000 China Science and Technology on Advanced Functional Composite laboratory Aerospace Research Institute of Materials & Processing Technology Beijing 100076 China

Polylactic acid (PLA) membranes have attracted significant attention in separation technologies due to their biodegradable properties. This study proposes a novel and eco-friendly pore-forming strategy for fabricating PLA membranes by triggering the in situ reaction between CaCO₃ nanoparticles and citric acid during the phase inversion process. Unlike conventional methods requiring synthetic pore-forming additives, this approach leverages the sacrificial role of CaCO₃ and the reaction-generated CO₂ nanobubble to synergistically construct a porous structure. The overall porosity increases from 70.2 % (pristine PLA membrane, M0) to 85.6 % (membrane prepared from a 6 wt% CaCO₃-containing casting solution, M6), while pure water flux rises dramatically from 20.1 L·m⁻²·h⁻¹ to 218.3 L·m⁻²·h⁻¹, with bovine serum albumin rejection maintained at 96.8 %. Furthermore, the flux recovery rate improves from 53.2 % (M0) to 71.2 % (M6), demonstrating enhanced antifouling properties. This entirely green fabrication process, employing only natural CaCO₃ and citric acid, represents a significant advancement in sustainable membrane technology and provides a viable route for developing high-performance biodegradable separation membranes. © 2025 Elsevier Ltd

关键词： Biodegradable membrane CaCO3 nanoparticles Citric acid Polylactic acid

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Hyaluronic acid methacrylate/laponite hydrogel loaded with BMP4 and maintaining its bioactivity for scar-free wound healing

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Regenerative Biomaterials 2023年第1期10卷 690-701页

作者： Likun Chang Yulong Xu Zhouying Wu Yichun Shao Dan Yu Wenyue Yang Liyuan Ye Xinyu Wang Binbin Li Yixia Yin State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Scar-free wound healing is a challenging process due to the excessive deposition of extracellular matrix and *** overcome this issue,hydrogels with superior biochemical and mechanical properties have been used in combination with medicinal compounds as wound *** this study,a novel composite hydrogel consisting of double-crosslinked photocurable hyaluronic acid methacrylate(HAMA)and Laponite(Lap)loaded with bioactive bone morphogenetic protein 4(BMP4)was developed and thoroughly characterized for its properties such as degradation,morphology,porosity,compression,skin adhesion and load *** effect of the HAMA/Lap/BMP4 hydrogel was evaluated through both in vitro and in vivo *** the in vivo rabbit ear-scar model,the HAMA/Lap/BMP4 hydrogel dressing was found to reduce scar-related expressions ofα-SAM and decrease the ratio of collagenΙ/III in wounded ***,histopathological examination indicated that the HAMA/Lap/BMP4 hydrogel-treated groups exhibited enhanced wound repair and increased levels of collagen maintenance compared to other standard groups,ultimately leading to scarless wound ***,this sustained-release photocurable HAMA/Lap/BMP4 hydrogel offers a therapeutic approach for scar-free wound healing.

关键词： HAMA/Lap/BMP4 photocurable nanocomposite hydrogel sustained release scar-free wound healing

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Microstructure Regulation and Combustion Performance Optimization of PVDF/Al Composite Powder by Non-covalent Functionalized Graphenes

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Journal of Wuhan University of technology(materials Science) 2024年第4期39卷 904-911页

作者：易卓然 DENG Haoyuan QIN Mei 孙一 LUO Guoqiang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Graphene prepared by non-covalent modification of sulfonated poly(ether-ether-ketone)(SPG)was combined with polyvinylidene fluoride(PVDF)/Al to improve the PVDF/Al thermal conductivity while reducing the effect of the thermal resistance at the graphene-polymer *** regulation rule of SPG with different contents on the energy release of fluorine-containing system was *** the content of SPG is 4%,the peak pressure and rise rate of SPG/PVDF/Al composite powder during ignition reach the maximum of 4845.28 kPa and 8683.58 kPa/*** the content of SPG is 5%,the PVDF/Al composite powder is completely coated by SPG,and the calorific value of the material reachs the maximum of 29.094 kJ/*** the design and micro-control of the composite powder,the calorific value of the material can be effectively improved,but the improvement of the mass release rate still depends on the graphene content and surface modification state.

关键词： energetic materials PVDF/Al composites graphene modification energy release combustion

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Electromagnetic parameters and microwave-absorption properties for the mixtures of mechanically milled spherical and flaky carbonyl iron powders

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Acta Metallurgica Sinica(English Letters) 2012年第3期25卷 201-206页

作者： Jinghua HE Wei WANG Aimin WANG Jianguo GUAN State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan Universityof TechnologyWuhan 430070China

The electromagnetic parameters were measured for the mixtures of mechanical milled carbonyl iron powders （CIPs） with different mass ratios of spheroid-like particles to flake-shape particles. The results indicate that mixing the sphere-like CIP particles with flake-shaped CIPs can be used to adjust effectively the electromagnetic parame- ters and enhance the absorption property in high frequency. In addition, a theoretic simulation based on the principle of superposition was carried out and compared with the microwave measurement results, indicating that the simple principle of superpo- sition can not reflect truly the internal interaction mechanism in the composites with different particle shapes.

关键词： Carbonyl iron Mechanical milling Electromagnetic property Microwave-absorption property

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