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SSRN 2023年

作者： Zhu, Ke Huang, Jin Nie, Wei Liu, Ruxia Xiao, Yong Zhang, Jian Luo, Guoqiang Shen, Qiang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Institute for Carbon Neutrality University of Science and Technology Beijing Beijing100083 China School of Material Science and Engineering

Enhancing the strength and plasticity of materials in a synergistic manner is a longstanding challenge in materials science. The content of β-stabilizing element W in Ti alloys is controlled using a chemical boundary engineering (CBE) strategy. Heterostructured Ti-xW composites are designed with α grain boundaries as the outer shell, α/β lamellar organization as the intermediate transition layer, and acicular martensite as the core region. This material exhibits a remarkable compressive yield strength of 2100 MPa, surpassing the majority of reported titanium matrix composites. The exceptional strength primarily arises from the precipitation strengthening of α/β lamellar organization and acicular martensite in the core region. Additionally, the gradient structure resulting from varying concentrations of W elements contributes to hetero-deformation induced (HDI) strengthening. This study holds significant implications for the development and design of high-strength heterostructured titanium matrix composites. © 2023, The Authors. All rights reserved.

关键词： Martensitic transformations

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Three-Dimensional Porous Polyimide Anode For High-Rate Lithium Ion Batteries

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SSRN 2023年

作者： Zhang, Qiuyitong Wei, Zijie Xu, Yuexin Lv, Ning Li, Hanyang Zhao, Xue Tian, Tian Wang, Yadong Tang, Haolin State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen Valley Foshan528200 China Xupu Central Primary School Yangzhou211400 China

Polymeric electrode materials suffer from poor electrical conductivity and slow transport kinetics, especially poor performance at high current density. Herein, a polyimide electrode structure with 3D ordered interconnected gradient pores is proposed for improving the lithium ion transport efficiency. The homogeneous mixed PMTA-PMMA composite is prepared by a simple one-pot method, and then the PMMA (polymethyl methacrylate) spherical porogenic agent is removed from it while synthesizing the polyimide material at high temperature to form a low curvature gradient pore structure. The large pores in the electrode can enhance the ion transport ability and improve the electrolyte infiltration rate, and the small pores can improve the active specific surface area and guide the deposition of lithium ions. The high specific capacity of 907mAh/g can be maintained even after 1000 cycles at 5A/g, which is about 3 times of the specific capacity of un-pored electrode material. This porous material with high active area and porosity is a potential electrode candidate for ultra-fast charging and discharging in lithium ion batteries, with high specific capacity and excellent cycling performance. © 2023, The Authors. All rights reserved.

关键词： Polyimides

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Fe_(3)O_(4)@silica nanoparticles for reliable identification and magnetic separation of Listeria monocytogenes based on molecular-scale physiochemical interactions

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Journal of materials Science & technology 2021年第25期84卷 116-123页

作者： Huawei Rong Tong Gao Yun Zheng Lingwei Li Dake Xu Xuefeng Zhang Yanglong Hou Mi Yan Key Laboratory for Anisotropy and Texture of Materials(MOE) School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China Institute of Advanced Magnetic Materials College of Materials and Environmental EngineeringHangzhou Dianzi UniversityHangzhou 310012China Beijing Key Laboratory for Magnetoelectric Materials and Device(BKLMMD) Beijing Innovation Center for Engineering Science and Advanced Technology(BIC-ESAT)Department of Materials Science and EngineeringCollege of EngineeringPeking UniversityBeijing 100871China State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China

Listeria monocytogenes(***)is one of the top five dangerous foodborne pathogens which widely exists in most raw food and has approximately 30%mortality rate in high-risk *** safety caused by foodborne pathogens is still a major problem faced by humans in all *** conventional analytical methods currently used involve complex bacteriological tests and usually take several days for incubation and ***,in order to prevent the spread of disease,the development of a detection method with high speed,high accuracy and sensitivity is urgent and ***,we developed an approach for the identification and magnetic capture of *** by using core@shell Fe_(3)O_(4)@silica nanoparticles terminated with hydroxyl or amine *** results show that both amine-and hydroxyl-terminated Fe_(3)O_(4)@silica core@shell nanoparticles functionalized with specific antibodies,present 95.2%±6.2%and 98.6%±0.3%capture efficacies,***,without conjugating the specific antibodies,the hydroxyl-terminated Fe_(3)O_(4)@silica nanoparticles exhibit 17.6%±1.6%efficacy,while the amine-terminated one remains 93.2%±9.2%capture efficiency ascribed to the high *** study quantitatively uncovers the specific and non-specific recognitions relevant to the molecular-scale physiochemical interactions between the microorganisms and the functionalized particles,and the results from this work can be generalized and extended to other bacterial species by changing antibodies,also have important implications in developing advanced analytic methods.

关键词： Listeria monocytogenes Magnetic capture Fe_(3)O_(4)@silica Functionalized nanoparticles

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Self-supported bimetallic iron-nickel sulfide nanosheets for efficient alkaline electrocatalytic oxygen evolution

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International Journal of Hydrogen Energy 2024年 81卷 1209-1215页

作者： Xiuwen Wang Jinrong Zhang Ming Zhong Bitao Su Ziqiang Lei Key Laboratory of Eco-Environment-Related Polymer Materials Ministry of Education of China Key Laboratory of Polymer Materials of Gansu Province College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou 730070 PR China State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology Lanzhou 730050 PR China

The ongoing pursuit of cost-effective approaches for synthesizing transition metal sulfide heterostructure oxygen evolution electrocatalysts, with the objective of optimizing active site exposure and stabilizing spatial framework, remains a significant challenge. In this study, self-supported bimetallic iron-nickel sulfide (Fe 1-x S-NiS/NF) nanosheet heterostructures were successfully fabricated in situ on nickel foam through the direct sulfurization of bimetallic carbonate precursors. The effects of sulfurization temperature and Fe content on the oxygen evolution reaction (OER) performance of the catalyst are investigated, and the best conditions are found to be 350 °C and 2 mmol, respectively. As expected, the optimized catalyst demonstrates remarkable OER performance in an alkaline solution with low overpotentials of 235 mV and 333 mV at high current densities of 50 mA cm −2 and 100 mA cm −2 , respectively. Furthermore, the catalyst shows long-term stability lasting for 35 h at 60 mA cm −2 with a negligible shift in the polarization curve observed even after 2000 cyclic voltammetry cycles, while also exhibiting good structural preservation. The current study has the potential to offer valuable insights into the fabrication of electrocatalysts based on metal sulfide heterostructures.

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Fabrication of silica-based ceramic cores with internal lattice structures by stereolithography

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China Foundry 2022年第5期19卷 369-379页

作者： Ke-hui Hu Hao-yuan Wang Kuan Lu Qian Feng Dao-ding Yang Jian Cao Bo Zhang Zhi-gang Lü Xing Ran State Key Laboratory of Tribology Tsinghua UniversityBeijing 100084China Department of Mechanical Engineering Tsinghua UniversityBeijing 100084China Ten Dimensions(Guangdong)Technology Co. Ltd.Foshan 528225GuangdongChina Guizhou Anji Aviation Investment Casting Co. Ltd.Anshun 561003GuizhouChina Key Laboratory of Advanced Materials Processing Technology Ministry of EducationTsinghua UniversityBeijing 100084China

Ceramic cores are widely used in investment casting,and ideal properties of cores are essential for high-quality *** the circumstances requiring thick cores,solid cores are likely to encounter deformation and cracking defects due to the accumulation of ***,with the superiority of ceramic stereolithography in producing complex ceramic parts,hollow cores with lattice structures were designed and *** dimensional accuracy and properties of the green and sintered bodies were *** show the dimensional accuracy of sintered cores is controlled within±0.25 mm benefited from the precise green *** mechanical properties are not obviously *** bending strength reaches 11.94 MPa at room temperature and 12.87 MPa at 1,500℃ with a creep deformation of 0.345 ***,casting verifications prove that the hollow cores meet the requirements of investment *** casting surfaces are obtained,at the same time,the core-removal efficiency is improved by over 3 times.

关键词： silica ceramic cores stereolithography lattice structure investment casting

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Chemical adsorption on 2D dielectric nanosheets for matrix free nanocomposites with ultrahigh electrical energy storage

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Science Bulletin 2022年第6期67卷 609-618,M0004页

作者： Jie Chen Zhonghui Shen Qi Kang Xiaoshi Qian Shengtao Li Pingkai Jiang Xingyi Huang Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing Department of Polymer Science and EngineeringThe State Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and DevicesWuhan University of TechnologyWuhan 430070China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong UniversityXi'an 710054China

Relaxor ferroelectric polymers display great potential in capacitor dielectric applications because of their excellent flexibility,light weight,and high dielectric ***,their electrical energy storage capacity is limited by their high conduction losses and low dielectric strength,which primarily originates from the impact-ionization-induced electron multiplication,low mechanical modulus,and low thermal conductivity of the dielectric *** a matrix free strategy is developed to effectively suppress electron multiplication effects and to enhance mechanical modulus and thermal conductivity of a dielectric polymer,which involves the chemical adsorption of an electron barrier layer on boron nitride nanosheet surfaces by chemically adsorbing an amino-containing polymer.A dramatic decrease of leakage current(from 2.4×10^(-6)to 1.1×10^(-7)A cm^(-2)at 100 MV m^(-1))and a substantial increase of breakdown strength(from 340 to 742 MV m^(-1))were achieved in the nanocompostes,which result in a remarkable increase of discharge energy density(from 5.2 to 31.8 J cm^(-3)).Moreover,the dielectric strength of the nanocomposites suffering an electrical breakdown could be restored to 88%of the original *** study demonstrates a rational design for fabricating dielectric polymer nanocomposites with greatly enhanced electric energy storage capacity.

关键词： Boron nitride nanosheets Electron barrier layer Relaxor ferroelectric polymers Nanocomposites Electrical energy storage

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Recent Progress in Improving Rate Performance of Cellulose-Derived Carbon materials for Sodium-Ion Batteries

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Nano-Micro Letters 2024年第8期16卷 102-147页

作者： Fujuan Wang Tianyun Zhang Tian Zhang Tianqi He Fen Ran State Key Laboratory of Advanced Processing and Recycling of Non‑Ferrous Metals Lanzhou University of TechnologyLanzhou 730050People’s Republic of China School of Materials Science and Engineering Lanzhou University of TechnologyLanzhou 730050People’s Republic of China School of Mechanical and Electronical Engineering Lanzhou University of TechnologyLanzhou 730050People’s Republic of China

Cellulose-derived carbon is regarded as one of the most promising candidates for high-performance anode materials in sodium-ion batteries;however,its poor rate performance at higher current density remains a challenge to achieve high power density sodium-ion *** present review comprehensively elucidates the structural characteristics of cellulose-based materials and cellulose-derived carbon materials,explores the limitations in enhancing rate performance arising from ion diffusion and electronic transfer at the level of cellulose-derived carbon materials,and proposes corresponding strategies to improve rate performance targeted at various precursors of cellulose-based *** review also presents an update on recent progress in cellulose-based materials and cellulose-derived carbon materials,with particular focuses on their molecular,crystalline,and aggregation ***,the relationship between storage sodium and rate performance the carbon materials is elucidated through theoretical calculations and characterization ***,future perspectives regarding challenges and opportunities in the research field of cellulose-derived carbon anodes are briefly highlighted.

关键词： Cellulose Hard carbon Anode materials Rate performance Sodium-ion batteries

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Novel implantable devices delivering electrical cues for tissue regeneration and functional restoration

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Medicine in Novel technology and Devices 2022年第4期16卷 70-78页

作者： Liu Wang Kuntao Chen Yubo Fan Lan Yin Key Laboratory of Biomechanics and Mechanobiology of Ministry of Education Beijing Advanced Innovation Center for Biomedical EngineeringSchool of Biological Science and Medical EngineeringAnd with the School of Engineering MedicineBeihang UniversityBeijing100083PR China School of Materials Science and Engineering The Key Laboratory of Advanced Materials of Ministry of EducationState Key Laboratory of New Ceramics and Fine ProcessingCenter for Flexible Electronics TechnologyTsinghua UniversityBeijing100084PR China

Millions of people suffer from tissue diseases and organ dysfunction,such as bone or nerve defects,spinal cord injuries and arrhythmia,which often leads to morbidity and *** stimulation as a promising nonpharmacological technique has been proven to be effective in promoting tissue regeneration and functional ***,existing clinical electrical therapies are often limited to intraoperative window or percutaneous stimulation that suffer from insufficient time frame and potential infection *** overcome these challenges,innovative electrical stimulation implants with miniaturized,self-powered,flexible or biodegradable features have been *** review summarizes recent advances of novel materials strategies and device schemes for tissue regeneration and/or functional restoration of bones,nerves,gastrointestinal tracts,cardiac systems,*** on future directions of electrical stimulation devices are given at the end.

关键词： electrical stimulation functional

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Flame-retardant Cotton Fabric based on Electrostatic Layer-by-layer Assembly of Vermiculite

Flame-retardant Cotton Fabric based on Electrostatic Layer-b...

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作者： Hong-Bin Cheng Xiao-Shu Liu Shi-Li Xiao School of Textile Science and Engineering Wuhan Textile University State Key Laboratory of New Textile Materials & Advanced Processing Technology

Flame-retardant cotton fabric, in clothing and decoration, can reduce the damage in a fire. This study reports a facile way to prepare vermiculite-assembled cotton fabrics using layer by layer assemble technique. The vermiculite-assembled cotton fabrics synthesized are characterized by SEM, FTIR, Instron and a vertical inflammability test. The results show that vermiculite assembled on cotton fabrics could improve the mechanical property and endow the fabric with the good flame-retardant property.

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Three-Dimensional Porous Polyimide Anode For High-Rate Lithium Ion Batteries

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SSRN 2023年

作者： Zhang, Qiuyitong Wei, Zijie Xu, Yuexin Lv, Ning Li, Hanyang Tian, Tian Wang, Yadong Tang, Haolin Zhao, Xue State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen Valley Foshan528200 China Xupu Central Primary School Yangzhou211400 China

关键词： Polyimides

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