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Mechanochemistry of an Interlocked Polycatenane:From Single Molecule to Bulk Gel

CCS Chemistry 2020年第1期2卷 513-523页

作者： Hao Xing Zhandong Li Wenbo Wang Peiren Liu Junkai Liu Yu Song Zi Liang Wu Wenke Zhang Feihe Huang State Key Laboratory of Chemical Engineering Department of ChemistryCenter for Chemistry of High-Performance&Novel MaterialsZhejiang UniversityHangzhou 310027(China) State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012(China) Key Laboratory of Macromolecular Synthesis and Functionalization of Ministry of Education Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027(China) Department of Chemistry The Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and ReconstructionInstitute for Advanced StudyDepartment of Chemical and Biological Engineering and Division of Life ScienceThe Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong(China)

Mechanically interlocked molecules(MIMs)are prototypical molecular machines with parts that enable controlled,large-amplitude movement with one component positioned relative to *** MIMs into polymeric matrices is promising for the designing of functional materials with unprecedented ***,the central issue is the challenges involved with establishing the mechanistic linkage between the single-molecule and the bulk ***,we explore the mechanochemical properties and energetic details of a linear poly[2]catenane with strong intercomponent hydrogen bonding(IHB)revealed by single-molecule force *** results showed that the individual linear poly[2]catenane chain exhibited typical sawtooth pattern,corresponding to the reversible unlocking and relocking transitions under external force or upon stimulations to dissociate or re-form the strong ***,when a poly[2]catenane-based polymer gel was prepared using a thiol-ene click reaction between thiol-ended poly[2]catenane and a low-molecule-weight cross-linker,the resultant gel showed excellent mechanical adaptability and dynamic properties,which correlated well with the molecular-level *** unique poly[2]catenane structure also contributed to the gel formation with an extraordinary IHB-mediated swelling behavior and shape memory *** our present results demonstrate the functioning of bulk material in a linear tandem manner from the behavior of a single molecule,a finding which should be applicable to other systems with versatile properties and promising applications.

关键词： polycatenane supramolecular polymer mechanochemistry single-molecule force spectroscopy

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Improving corrosion resistance of Kovar by subjection to a coupled electromagnetic treatment

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materials Chemistry and Physics 2025年 344卷

作者： Fu, Shuai Wang, Yuan Qin, Yi Huang, Liang Huang, Kunlan Wang, Jie School of Mechanical Engineering Sichuan University Sichuan Chengdu610065 China Centre for Precision Manufacturing DMEM The University of Strathclyde James Weir Building 75 Montrose Street GlasgowG1 1XJ United Kingdom State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan430074 China

As a common electronic packaging device, Kovar primarily serves to secure, seal, and protect semiconductor chips. The Ni–Au coating applied to its surface effectively resists external corrosion. However, residual stress and defects generated during the electroplating process of the Ni–Au layer often diminish the corrosion resistance of the coating. This study employs a coupled electromagnetic treatment (CEMT) to regulate the Ni–Au coating after electroplating, with the aim of improving their corrosion resistance. The results indicate that the corrosion resistance of the Ni–Au coating was effectively improved after CEMT, and the product qualification rate is 95 %. The residual tensile stress was greatly reduced, the residual tensile stress in the X direction was reduced by 44.84 %, and in the Y direction was reduced by 61.75 %. The nanohardness increased from 0.74 GPa to 0.91 GPa, an increase of 22.97 %. Microstructure analysis showed that the dislocation density of the coating after CEMT was reduced by about 4.2 %, and the dislocation distribution was more uniform. The reduction of stress and the repair of defects provide an important basis for improving the corrosion resistance of the coating. © 2025 Elsevier B.V.

关键词： Corrosion resistant coatings

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BiCuSeO as state-of-the-art thermoelectric materials for energy conversion:from thin films to bulks

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Rare Metals 2018年第4期37卷 259-273页

作者： Rui Liu Xing Tan Yao-Chun Liu Guang-Kun Ren Jin-Le Lan Zhi-Fang Zhou Ce-Wen Nan Yuan-Hua Lin State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology

BiCuSeO-based thermoelectric material has attracted great attention as state-of-the-art thermoelectric materials since it was first reported in 2010. In this review, we update the studies on the BiCuSeO thin films first. Then, we focus on the most recent progress of multiple approaches that enhance the thermoelectric performance including advanced synthesized technologies, notable mechanisms for higher power factor （optimizing carrier concentration, carrier mobility, Seebeck coefficient） and doping effects predicted by calculation. And finally, aiming at further enhancing the performance of these materials and ultimately commercial application, we give a brief discussion on the urgent issues to which should be paid close attention.

关键词： BiCuSeO state-of-the-art thermoelectricmaterials Thin films Bulks

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Surface modification strategies for silicon based anodes coated with polymer-derived carbon source

Review of Materials Research

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Review of materials Research 2025年第3期1卷

作者： Jie Gao Guodong Yang Wanwen Huang Zi-Chen Lin Lei Miao Yuanyuan Jiang Jianhua Zhou Jun-Liang Chen Haiqing Qin Feng Dang Guangxi Key Laboratory of Information Materials Guangxi Collaborative Innovation Center of Structure and Property for New Energy Materials Guilin University of Electronic Technology Guilin 541004 PR China Guangxi Novel Battery Materials Research Center of Engineering Technology State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures School of Physical Science and Technology Guangxi University Nanning 530004 PR China Guangxi Key Laboratory of Superhard Material National Engineering Research Center for Special Mineral Material Guangxi Technology Innovation Center for Special Mineral Material China Nonferrous Metal (Guilin) Geology and Mining Co.Ltd. Guilin 541004 PR China Key Laboratory for Liquid-Solid Structure Evolution and Processing of Materials (Ministry of Education) Shandong University Jinan 250061 PR China

By forming alloys with Li ions, silicon (Si) can possess an energy capacity ten times that of graphite anodes, making it a promising candidate for the next generation anode materials for lithium-ion batteries. However, the large volumetric changes of Si during the lithiation/delithiation process result in unstable electrochemical cycling performance, and the deficiencies in electrical and ionic conductivity limit its rate performance, thereby constraining the large-scale application of Si-based anode. Due to its strong interaction with Si particles and its convenience in constructing doped carbon layers and carbon layers with special structures, polymers are regarded as low-cost (for example, the price of lignin is as low as 200–600 $/ton) and effective carbon sources to prepare core-shell structured Si@C composite materials and optimize the shortcomings of Si-based anodes. In this review, we first discuss surface modification methods for Si particles aimed at enhancing the adhesion to polymers and effectively improving the dispersibility of Si nanoparticles in polymers. Subsequently, the roles and methods for improving the electronic/ionic conductivity and structural stability of carbon layers, including doping and the construction of various special structures, are summarized and compared. These advancements position Si@C composites as viable candidates for next-generation high-energy batteries. Finally, the prospects for Si anodes coated with polymer-derived carbon layers are proposed.

关键词： Silicon based anodes Surface modification Pcarbon layer

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An Adaptive Robot Hand with Spiral Blade Expansion Slide Tube

An Adaptive Robot Hand with Spiral Blade Expansion Slide Tub...

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IEEE International Conference on Robotics and Biomimetics

作者： Jinzhe Wang Wenzeng Zhang The State Key Laboratory of Tribology the Key Laboratory for Advanced Materials Processing Technology (MOE) Tsinghua University Beijing China

Robot hand has a wide range of applications in the field of robot, which is used to connect the robot and the object temporarily, and can be released at the appropriate time. The robot hand grabs the object first and then releases it. In order to reduce the cost, the general robot hand is made into two parts with relative motion in order to realize the function of grasping and releasing. There are also many structures that mimic human hands and are designed to have more fingers and several joints, but that leads to higher system complexity. In order to solve the problems of adaptability and complexity, we design an adaptive robot hand with spiral blade expansion slide tube array. The device is used to grasp objects and achieve the effect of multi-directional grasping of objects. It can provide grasping force to the object in many directions, especially has good adaptability to the top and side of the object, and adapts to the grasping of objects of different shapes and sizes. All kinds of shapes placed in different directions can be grasped effectively. In the design of the robot hand, due to the array arrangement of the sliding tube, when the sliding tube buckles to the object from top to bottom, it can first be adaptive to the object in the horizontal direction, and then the expansion of the elastic thin film tube can be adaptive to the side of the object. Combined with the ascending motion of spiral rotation, the multi-directional grasping effect is achieved. Compared with the traditional robot hand, the robot hand has higher adaptability and simpler maneuverability. In this paper, the detailed design scheme of the machine hand is given, and the feasibility of the device is verified by force analysis. After improvement, the device has a certain demand on the production line that needs to be grasped.

关键词：

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Monolithic Interphase Enables Fast Kinetics for High-Performance Sodium-Ion Batteries at Subzero Temperature

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Angewandte Chemie 2024年第23期136卷

作者： Yi-Hu Feng Dr. Mengting Liu Junxiu Wu Dr. Chao Yang Qiang Liu Yongwei Tang Xu Zhu Guang-Xu Wei Haojie Dong Xin-Yu Fan Si-Fan Chen Wenyu Hao Dr. Lianzheng Yu Prof. Xiao Ji Prof. Ya You Prof. Peng-Fei Wang Prof. Jun Lu Center of Nanomaterials for Renewable Energy State Key Laboratory of Electrical Insulation and Power Equipment School of Electrical Engineering Xi'an Jiaotong University Xi'an Shaanxi 710049 P. R. China College of Chemical and Biological Engineering Zhejiang University Hangzhou Zhejiang 310027 P. R. China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan Hubei 430070 P. R. China School of Optical and Electronic Information-Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan Hubei 430074 P. R. China Jiangsu Jufeng New Energy Technology Co. Ltd. Changzhou Jiangsu 213166 P. R. China

In spite of the competitive performance at room temperature, the development of sodium-ion batteries (SIBs) is still hindered by sluggish electrochemical reaction kinetics and unstable electrode/electrolyte interphase under subzero environments. Herein, a low-concentration electrolyte, consisting of 0.5M NaPF 6 dissolving in diethylene glycol dimethyl ether solvent, is proposed for SIBs working at low temperature. Such an electrolyte generates a thin, amorphous, and homogeneous cathode/electrolyte interphase at low temperature. The interphase is monolithic and rich in organic components, reducing the limitation of Na + migration through inorganic crystals, thereby facilitating the interfacial Na + dynamics at low temperature. Furthermore, it effectively blocks the unfavorable side reactions between active materials and electrolytes, improving the structural stability. Consequently, Na 0.7 Li 0.03 Mg 0.03 Ni 0.27 Mn 0.6 Ti 0.07 O 2 //Na and hard carbon//Na cells deliver a high capacity retention of 90.8 % after 900 cycles at 1C, a capacity over 310 mAh g −1 under −30 °C, respectively, showing long-term cycling stability and great rate capability at low temperature.

关键词： interphase kinetics low temperature sodium-ion batteries solvation structure

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High Performance Supercapacitors Based on Wood-Derived Thick Carbon Electrodes Synthesized Via Green Activation Process

SSRN

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SSRN 2022年

作者： Yan, Bing Feng, Li Zheng, Jiaojiao Zhang, Qian Jiang, Shaohua Zhang, Chunmei Ding, Yichun Han, Jingquan Chen, Wei He, Shuijian International Innovation Center for Forest Chemicals and Materials Co-Innovation Center of Efficient Processing Utilization of Forest Resources College of Materials Science and Engineering Nanjing Forestry University Nanjing210037 China College of Science Nanjing Forestry University Nanjing210037 China Institute of Materials Science and Devices School of Materials Science and Engineering Suzhou University of Science and Technology Suzhou215009 China Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou350010 China State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Jilin Changchun130022 China University of Science and Technology of China Hefei230026 China

Electrical double-layer supercapacitors are one type of electrochemical energy devices promising for next-generation energy storage, while they still suffer from great challenges of inferior energy density and poor tolerance to harsh conditions toward practical applications. Herein, by designing a thick carbon electrode with an ultrahigh mass loading (~40 mg cm-2 ) from carbonization and activation of basswood, a supercapacitor is able to operating under harsh conditions such as fast charge/discharge rates (100 mA cm-2 ), ultralong cycle life (≥ 50,000 cycles), and ultralow temperature (-40 ℃) . The carbon electrode inherited the vertical channels of basswood, which enhances the penetration and mass transport of electrolyte ions;and it also possessed rational micro/meso-sized pores and oxygen-containing functional groups induced by H2O2 activation, which improves the ion transport kinetics of electrodes. In consequence, the assembled supercapacitors achieved appreciable capacitive performance even with commercial-level mass loadings and at ultralow temperatures, that delivered a specific capacitance of 6205.7 mF cm-2 (221.6 F g-1 and 77.6 F cm-3) and 4886.4 mF cm-2 (174.5 F g-1, 61.1 F cm-3) at ambient temperature and -40 ℃, respectively. In addition, the device presented an ultralong working lifetime in harsh environments, evidenced by a capacitance retention of 90.6% even after 70,000 cycles at -40 ℃. Benefiting from the renewable precursor, green activation process, and encouraging capacitive performances, the H2O2 -activated wood-derived carbon monoliths would be promising high mass-loading electrodes for developing supercapacitors working at ultralow temperatures. © 2022, The Authors. All rights reserved.

关键词： Chemical activation

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Accurate reconstruction and prediction of T55511 titanium alloy microstructure using DDPM model and quantitative evaluation

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Progress in Natural Science: materials International 2025年

作者： Zhu, Yongcheng Du, Zhaoxin Gong, Tianhao Yue, Zhiyong Zhang, Shuzhi Cheng, Jun Kang, Xudong Zeng, Qiang Liu, Jingshun School of Materials Science and Engineering Inner Mongolia University of Technology Hohhot010051 China Collaborative Innovation Center of Non-ferrous Metal Materials and Processing Technology Co-constructed By the Provience and Ministry Inner Mongolia Autonomous Region Inner Mongolia University of Technology Hohhot010051 China Inner Mongolia Key Laboratory of New Materials and Surface Engineering Inner Mongolia University of Technology Hohhot010051 China School of Mechanical Engineering Inner Mongolia University of Technology Hohhot010051 China College of Mechanical Engineering Inner Mongolia University of Technology Hohhot010051 China State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao066004 China Northwest Institute for Non-Ferrous Metal Research Shanxi Key Laboratory of Biomedical Metal Materials Xian710016 China

The exploration of the relationship between microstructure and properties is essential in materials research. However, traditional methods are often costly and time-consuming, and manual quantitative analysis is subject to high levels of subjectivity, which hinders accurate reflection of microstructural features. In this study, based on a multimodal database of the Solution-Treatment-Aging (STA) process for titanium alloys, we developed a deep learning model for microstructure-property relationships in T55511 alloy by employing a Denoising Diffusion Probabilistic Model (DDPM) with a conditional U-Net as the denoising network. The model generates high-fidelity microstructure images through progressive denoising and adaptively predicts the complex relationships between microstructure and properties based on processing conditions. Results demonstrate that the model produces images with high clarity and strong resemblance to real microstructures. Quantitative information obtained via semantic segmentation shows that the model achieves a mean absolute error (MAE) of ≤30 nm for primary phase (αp) and ≤20 nm for secondary phase (αs), closely matching real-world data. This study validates the reliability of the DDPM model in generating alloy microstructures and highlights its potential for broad applications, including other alloy systems, process optimization, and materials design. © 2025 Chinese materials Research Society

关键词： Microstructural evolution

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Effects of scanning speed on microstructure in laser surface-melted single crystal superalloy and theoretical analysis

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Journal of materials Science & technology 2018年第8期34卷 1315-1324页

作者： Guowei Wang Jingjing Liang Yanhong Yang Yu Shi Yizhou Zhou Tao Jin Xiaofeng Sun Institute of Metal Research Chinese Academy of Sciences School of Materials Science and Engineering University of Science and Technology of China State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology

Scanning speed is a critical parameter for laser process, which can play a key role in the microstruc- ture evolution of laser melting. In the laser melting of single crystal superalloy, the effects of scanning speed were investigated by experimental analysis and computational simulation. The laser was scanning along [710] direction on （001） surface in different speeds. Solidification microstructures of dendrites growth direction and the primary dendritic spacing were analyzed by metallograph. Besides, a planar interface during solidification was taken into attention, Experiment results indicated that the primary dendritic spacing and thickness of planar interface decrease with the increase of speed. Through simu- lation, distribution of dendrites growth velocity and thermal gradient along dendrite growth direction were calculated, and the simulation of dendrites growth direction agreed with the experiment results. Additionally, a constant value was acquired which can be used to predict the primary dendritic spacing. Moreover, according to curve-fitting method and inequality relation, a model was proposed to predict the thickness of planar interface.

关键词： Scanning speed Laser remelting Single crystal superalloy First dendrites spacing Planar interface

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Design of A Novel Robot Finger with Changeable Surface for In-hand Manipulations of Co-fusion Robots

Design of A Novel Robot Finger with Changeable Surface for I...

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IEEE International Conference on Cyber technology in Automation, Control, and Intelligent Systems

作者： Yixin Wang Kui Hu Wenzeng Zhang State Key Laboratory of Tribology Key Laboratory for Advanced Materials Processing Technology (MOE) Tsinghua University Beijing China

ISBN: (数字)9781728107707

ISBN: (纸本)9781728107714

The design of the most of the traditional multi-fingered hands is the imitation of human hand. It causes that a large number of simple operations can be realized only by using the finger joints or wrist, which brings about complex control algorithm and the waste of time and energy. To solve this problem, this paper presents a novel design of robot finger with changeable surface for in-hand manipulation of co-fusion robots, called CS finger. Due to the special structure including pulley-belt mechanism and planetary gear mechanism, the surface of the CS finger can move in two directions and change the kind of the surface according to the environment, which makes many operations realized greatly easily and efficient like twisting the key to unlock and picking up soft cloth. Owing to its compact structure, low control requirements and high adaptability to the environment, the CS finger has important application prospects in the field of home services, micro-nano manufacturing and aeronautics and Astronautics, etc.

关键词： Thumb Skin Gears Force Robots Friction

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