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SSRN 2022年

作者： He, Ha Hu, Shunyou Lu, Beibei Hu, Yuanyuan Wang, Mi Yu, Wen Wang, Gui-Gen Zhang, Jiaheng Wu, Dong School of Materials Science and Engineering Harbin Institute of Technology Shenzhen518055 China State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology Shenzhen518055 China Research Centre of Printed Flexible Electronics Harbin Institute of Technology Shenzhen518055 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin150080 China

Low-cost and sustainable superwetting materials are urgently required for oily wastewater treatment. Many poly(vinylidene fluoride) (PVDF)-based materials have been designed for oil-water separation. However, their fabrication processes frequently require toxic solvents and expensive materials (e.g., carbon tubes and graphane). In this study, a porous bamboo powders (BP)-enhanced PVDF foam (SBPF) was fabricated via a organic solvent-free process. The SBPF exhibits a high adsorption performance for various oils and can be steadily used for their efficient recovery by squeezing, heating, and filtering . Moreover, the SBPF shows high absorbtion and separation performacne under ultraviolet exposure and turbulent environments. It can also be used for water-in-oil emulsions separation, with a high separation efficiency more than 99.3% under gravity. Interestingly, the SBPF shows underwater superoleophobicity and underoil superhydrophobicity after delignification. Owing to the conversion of wettability, it presents a high performance in treatment of both surfactant-stabilied water-in-oil and oil-in-water emulsions with the high separation sfficiency achieving more than 99.6% and 99.5% respectively under gravity. In addition, the delignated SBPF shows a high separation performance even after ten cycles. Hence, this fabricated organic solvent-free foam is a promising candidate for sustainable on-demand separation of oils or organic solvents and water in complex environments © 2022, The Authors. All rights reserved.

关键词： Wetting

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Prediction of Deformation and Footprint of High-speed Rotating Radial Tires

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橡胶工业 2020年第5期67卷 346-355页

作者： CUI Zhibo CHAI Delong LYU Jiafeng HU Kai ZHANG Chunsheng HOU Dandan WANG Youshan National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150001China Zhongce Rubber Group Co. LtdHangzhou 310018China

In this research,the tire deformations due to rotation are divided into three parts:tread,belt and *** deformation is obtained by using a rotating hollow cylinder model,belt expansion is calculated according to the laminated composite shell theory,and a formula of dynamic equilibrium profile is built to investigate carcass ***,a simple method is used to predict the footprint changes caused by tire *** show that a large deformation is occurring at tire shoulder,a smaller one at tread centre,and the shoulder deformations are mostly caused by *** of footprint side edges increase with tire rolling speed *** predicted tread,belt,carcass deformations and footprint changes are in good agreement with finite element analysis *** proposed method and the results will offer a helpful guidance to tire and vehicle engineers.

关键词： radial tire tire deformation tire footprint equilibrium profile finite element analysis

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Evaluation of numerical ablation model for charring composites

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science China(Technological sciences) 2019年第8期62卷 1322-1330页

作者： LI Wei ZHANG Jun FANG GuoDong LI WeiJie LIANG Jun MENG SongHe Science and Technology on Advanced Composites in Special Environments Key Laboratory Harbin Institute of Technology Harbin 150001 China Institute of Advanced Structure Technology Beijing Institute of Technology Beijing 100081 China

Charring composites are widely used in the thermal protection system(TPS) to consume the intense aerodynamic heating during vehicle reentry. The ablation and thermal responses for the charring composites can be studied by using a numerical ablation model, in which the surface ablation and volume ablation could be taken into account. The coupling interactions among temperature, gas motion and interior pressure producing the pyrolysis gas could make the computation more complicated. A multi-physics model is developed to simulate the thermal response coupled with volume ablation and surface ablation. After studying four typical ablation cases, the model is validated, and then the heat transfer mechanisms in ablation are investigated. It is found that the viscous dissipation energy by the motion of pyrolysis gas can be neglected in the simulation. Also, the flow of pyrolysis gas plays an important role in the temperature response, especially under high heat flux condition.

关键词： ablation charring composites numerical model coupling

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New advances in fiber-reinforced composite honeycomb materials

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science China(Technological sciences) 2020年第8期63卷 1348-1370页

作者： WEI XingYu XIONG Jian WANG Jie XU Wu Center for Composite Materials and Structures Harbin Institute of TechnologyHarbin 150001China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150080China Shanghai Aircraft Design and Research Institute Shanghai 201210China School of Aeronautics and Astronautics Shanghai Jiao Tong UniversityShanghai 200240China

In sandwich structures,lightweight cellular materials as the core hold the face sheets far away from the neutral axis to maximize the bending performance of the *** materials as a major type of lightweight cellular materials have been widely applied in various fields,including aerospace,vehicle,marine,architecture and mechanical engineering,due to reliable mechanical properties and excellent *** fiber-reinforced composites is an efficient method to develop ultralight honeycomb materials with superior mechanical *** recent years,fiber-reinforced composite honeycomb materials possessing lightweight and excellent mechanical performances have attracted noticeable attention to replacing traditional aluminum honeycombs and Nomex *** to metal,polymer and Nomex paper,fiber-reinforced composites possess various merits,such as high specific stiffness and specific strength,excellent fatigue property,corrosion resistance and high-temperature ***,the applications of fiber-reinforced honeycomb material for sandwich core have unlimited potential in hypersonic vehicles,long-range rockets,cargo vessels and protective *** the fact that attention has been rapidly increasing,there is a lack of comprehensive reviews of new advances in the field of fiber-reinforced composite honeycomb *** this review,new advances reported by different scientists in the field of fiber-reinforced honeycomb materials have been reviewed and analyzed to provide an in-depth overview and knowledge for beginners in the field of ultralightweight and high-performance composite sandwich *** challenges and prospects for the development of fiberreinforced honeycomb materials have also been presented.

关键词： composite honeycomb materials sandwich structures failure mechanism mechanical property

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One-Pot Preparation of MXene/SPUA Hollow Microsphere and its Electromagnetic Absorbing Properties

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SSRN 2022年

作者： An, Boyuan Zhang, Dongjie Liu, Yuyan Fan, Zhimin Tan, Huifeng Xie, Zhimin National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Center for Composite Materials and Structures Harbin Institute of Technology Harbin150001 China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin150001 China

Ti3C2Tx (MXene) has potential applications in electromagnetic (EM) absorbing due to its excellent electrical properties. Generally, the MXene hollow core-shell structure is obtained by the template method for EM absorbing. However, due to the need of post-processing such as high-temperature carbonization, this will lead to the oxidation of MXene. Here, we propose a one-pot method to prepare MXene/SPUA hollow microspheres through the emulsion polymerization to avoid this defect. The flocculation method was used to increase the content of MXene in the SPUA shell. UV spectrum and SEM proved the high content of MXene in the shell and the acquisition of regular microspheres with the introduction of arabic gum. Remarkably, the MXene/SPUA hollow microspheres with K2SO4 flocculant achieve a RLmin of -18dB with a corresponding EAB of 4 GHz. While the RLmin of microspheres without K2SO4 flocculant all > -10 dB. In addition, we also found the MXene/SPUA hollow microsphere with regular spherical structure has better EM absorbing performance. It is reasonable to consider that MXene/SPUA microspheres are more compatible with polymer matrix. At the same time, MXene/SPUA hollow microspheres have nonmagnetic particles, they are particularly suitable for applications in fields with limited magnetic properties, such as medical and health care. © 2022, The Authors. All rights reserved.

关键词： Microspheres

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A Novel Strategy for Promoting Corrosion Resistance of 304 Stainless Steel in High-Temperature Molten Nacl-Mgcl2-Kcl Salts: Gradient Eutectic Fe-Ni-Mo Alloy Coating Induced by In-Situ Bidirectional Diffusion

SSRN

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SSRN 2024年

作者： Liu, Sijie Wang, Renda Yu, Ping Liang, Kun Wang, Li Gao, Mengyu Si, Yang Zhu, Chuang Ge, Fangfang Li, Bingsheng State Key Laboratory for Environment-friendly Energy Materials Southwest University of Science and Technology Sichuan Mianyang621010 China Zhejiang Key Laboratory of Data-Driven High-Safety Energy Materials and Applications Ningbo Key Laboratory of Special Energy Materials and Chemistry Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo315201 China Qianwan Institute of CNITECH Ningbo315336 China School of Electronic and Information Engineering Ningbo University of Technology Ningbo315211 China School of Energy and Electrical Engineering Qinghai University No. 251 Ningda Road Chengbei district Xining810016 China Advanced Energy Science and Technology Guangdong Laboratory Huizhou516000 China

Austenitic stainless steels, such as 304, 310, 316, are widely used in industry due to its low cost and mature fabrication. However, the dissolved corrosion of 304 stainless steels (304SS) in molten NaCl-MgCl2-KCl salt at 700 °C was serious, which limits 304SS used in concentrated solar power generation (CSP). To enhance corrosion resistance of 304SS, magnetron-sputtered molybdenum (Mo) coatings were deposited on single side of 304 stainless plates. After Mo coating deposition, the sample was sealed into vacuum quartz tubes and annealed in a tube furnace to 800 °C for 3 h to increase in the adhesion strength and thermal stability. After the 200-h immersion, the weight loss rate of the 304 stainless plates was reduced from ~17% to ~5%. The corrosion-resistance mechanisms depended on the Mo-enriched layer which effectively suppressed the outward diffusion of alloy elements and trapped Cr to form Cr-O compounds. However, the Mo-enriched layer locally fell off after four thermal cycles (200 h interval), maybe for a large mismatch of thermal expansion coefficients between Mo and 304SS. © 2024, The Authors. All rights reserved.

关键词： High temperature corrosion

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Preparation of Gr-Tin/Pla/Tpu Composite Materials and Study on Their Microwave Absorption Properties

SSRN

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SSRN 2023年

作者： Li, Lijun Chao, Bin Wu, Haihua Liu, Shaokang Fu, Wenxin Jang, Jiantang Deng, Kaixin Li, Yan School of Mechanical and Power Engineering China Three Gorges University Yichang443002 China Hubei Engineering Research Center for Graphite Additive Manufacturing Technology and Equip ment China Three Gorges University Yichang443002 China National Key Laboratory of Science and Technology on Advanced Composites in Special Enviro nments Harbin Institute of Technology Harbin150080 China

In this paper, GR-TiN/PLA/TPU composite wires were prepared by melt extrusion forming process and GR-TiN/PLA/TPU composites were obtained by fused deposition moulding (FDM) *** effects of graphene content on the wave absorption properties and mechanical properties of the composites were investigated. With the increase of graphene content, the wave absorption performance of the composite gradually enhanced, but the mechanical properties decreased. When the GR content is 4wt%, its maximum reflection loss is -29.08dB at 15.60GHz, and the effective absorption bandwidth reaches 6.80GHz when the thickness of the absorber layer is 3.0mm, and the tensile strength reaches *** excellent wave absorption performance can be attributed to the fact that the composite of graphene and titanium nitride not only improves the impedance matching performance of the composite but also forms abundant folds and bumps inside the composite, forms a three-dimensional micro-conducting network and enhances the interfacial polarisation loss and electrical conductivity. © 2023, The Authors. All rights reserved.

关键词： Graphene

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The Main Progress of Perovskite Solar Cells in 2020-2021

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Nano-Micro Letters 2021年第10期13卷 113-130页

作者： Tianhao Wu Zhenzhen Qin Yanbo Wang Yongzhen Wu Wei Chen Shufang Zhang Molang Cai Songyuan Dai Jing Zhang Jian Liu Zhongmin Zhou Xiao Liu Hiroshi Segawa Hairen Tan Qunwei Tang Junfeng Fang Yaowen Li Liming Ding Zhijun Ning Yabing Qi Yiqiang Zhang Liyuan Han State Key Laboratory of Metal Matrix Composites School of Material Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Centre Shanghai Key Laboratory of Functional Materials ChemistryJoint International Research Laboratory of Precision Chemistry and Molecular EngineeringSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyMeilong Road 130Shanghai 200237People’s Republic of China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyLuoyu Road 1037Wuhan 430074People’s Republic of China College of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing 210094People’s Republic of China Beijing Key Laboratory of Novel Thin-Film Solar Cells and State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources North China Electric Power UniversityBeijing 102206People’s Republic of China Department of Microelectronic Science and Engineering Ningbo UniversityZhejiang 315211People’s Republic of China College of Chemical Engineering Jiangsu Key Lab of Biomass-Based Green Fuels and ChemicalsNanjing Forestry UniversityNanjing 210037People’s Republic of China College of Chemistry and Molecular Engineering Qingdao University of Science and TechnologyQingdao 266042People’s Republic of China Special Division of Environmental and Energy Science Komaba Organization for Educational Excellence(KOMEX)College of Arts and SciencesUniversity of TokyoTokyo 153-8902Japan National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied SciencesNanjing UniversityNanjing 210093People’s Republic of China College of Information Science and Technology Jinan UniversityGuangzhou 510632People’s Republic of China School of Physics and Electronic Science Engineering Research Center of Nan

Perovskite solar cells(PSCs)emerging as a promising photovoltaic technology with high efficiency and low manufacturing cost have attracted the attention from all over the *** the efficiency and stability of PSCs have increased steadily in recent years,and the research on reducing lead leakage and developing eco-friendly lead-free perovskites pushes forward the commercialization of PSCs step by *** review summarizes the main progress of PSCs in 2020 and 2021 from the aspects of efficiency,stability,perovskite-based tandem devices,and lead-free ***,a brief discussion on the development of PSC modules and its challenges toward practical application is provided.

关键词： Perovskite solar cells Stability Solar module Perovskite-based tandem devices Lead-free perovskite

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Enhanced multiphoton photoluminescence in metaphotonics

Enhanced multiphoton photoluminescence in metaphotonics

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CLEO: QELS_Fundamental science, QELS 2022

作者： Tonkaev, Pavel Fan, Yubin Wang, Yuhan Han, Jiecai Zalogina, Anastasia Tripathi, Aditya Lee, Hoo-Cheol Park, Hong-Gyu Makarov, Sergey Kruk, Sergey Song, Qinghai Xiao, Shumin Kivshar, Yuri Nonlinear Physics Center Research School of Physics Australian National University CanberraACT2601 Australia ITMO University St. Petersburg197101 Russia Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System Shenzhen Graduate School Harbin Institute of Technology Shenzhen518055 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin150080 China Department of Physics Korea University Seoul02841 Korea Republic of Collaborative Innovation Center of Extreme Optics Shanxi University Shanxi Taiyuan030006 China

ISBN: (纸本)9781557528209

We study multiphoton photoluminescence from several types of nonlinear resonant metaphotonic structures. We develop a general theoretical approach to describe such nonlinear effects and confirm our predictions in experiments with perovskite metasurfaces and AlGaAs nanoantennas. © Optica Publishing Group 2022, © 2022 The Author(s)

关键词： Photoluminescence

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Dynamic Analysis of the Human-Machine System of a 4-Bar Gait Constraint Mechanism

Dynamic Analysis of the Human-Machine System of a 4-Bar Gait...

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IEEE International Conference on Mechatronics, Robotics and Automation (ICMRA)

作者： Lailu Li Lixun Zhang Bing Wang Da Song National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin China College of Mechanical and Electrical Engineering Harbin Engineering University Harbin China School of Mechanical Engineering Northeast Electric Power University Jilin China

Bar gait constraint mechanism has been proposed in terms of its benefits: low-cost, easy to adjust, and low weight. Aiming to analyze the interaction characteristics between the human body and the end-effector of the 4-Bar mechanism, it is necessary to conduct the dynamic analysis of the human-machine system, including the interaction force, contact force, and joint torque. First, a gait constraint mechanism based on 4-Bar was introduced. Second, the dynamic mathematical model of the human-machine system was established. Third, the dynamic simulation based on the mathematical equations was carried out. The results demonstrate that the interaction force between the machine and the human body is smooth. The human joint torques are also in a reasonable range, indicating that the 4-Bar gait constraint mechanism could assist individuals with locomotion obstacles to achieve low-limb exercises.

关键词：

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