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Bioactive citrate-based polyurethane tissue adhesive for fast sealing and promoted wound healing

Regenerative Biomaterials 2024年第1期3卷 69-81页

作者： Yan Li Jiawei Liu Chenxi Lian He Yang Mingjiang Zhang Youfa Wang Honglian Dai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Biomedical Materials and Engineering Research Center of Hubei ProvinceWuhan University of TechnologyWuhan 430070China Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou 521000China Shenzhen Research Institute of Wuhan University of Technology Shenzhen 518000China

As a superior alternative to sutures,tissue adhesives have been developed significantly in recent ***,existing tissue adhesives struggle to form fast and stable adhesion between tissue interfaces,bond weakly in wet environments and lack *** this study,a degradable and bioactive citrate-based polyurethane adhesive is constructed to achieve rapid and strong tissue *** hydrophobic layer was created with polycaprolactone to overcome the bonding failure between tissue and adhesion layer in wet environments,which can effectively improve the wet bonding *** citrate-based polyurethane adhesive provides rapid,non-invasive,liquid-tight and seamless closure of skin incisions,overcoming the limitations of sutures and commercial tissue *** addition,it exhibits biocompatibility,biodegradability and hemostatic *** degradation product citrate could promote the process of angiogenesis and accelerate wound *** study provides a novel approach to the development of a fast-adhering wet tissue adhesive and provides a valuable contribution to the development of polyurethane-based tissue adhesives.

关键词： tissue adhesive polyurethane citrate wet adhesion

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Rekindling hopes for lithium-sulfur batteries

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National Science Review 2025年第4期 88-90页

作者： Hongtao Qu Bao-Lian Su Laboratory of Inorganic Materials Chemistry (CMI) University of Namur State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

Lithium-sulfur(Li-S) batteries represent a promising solution for next-generation energy storage due to their high energy density, low cost, and environmental friendliness. However, liquid electrolytebased Li-S batteries are plagued by the‘polysulfide shuttling' effect, leading to severe performance degradation [1,2].

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Tightened1D/3Dcarbonheterostructure infiltratingphase change materials for solar-thermoelectric energy harvesting:Faster and better

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Carbon Energy 2023年第6期5卷 104-117页

作者： Zhaodi Tang Piao Cheng Panpan Liu Yan Gao Xiao Chen Ge Wang Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory of Function Materials for Molecule&Structure ConstructionSchool of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijingPR China Institute of Advanced Materials Beijing Normal UniversityBeijingPR China Aerospace Institute of Advanced Material and Processing Technology BeijingPR China Shunde Graduate School University of Science and Technology BeijingShundePR China

Extensive use of thermal energy in daily life is ideal for reducing carbon emissions to achieve carbon neutrality;however,the effective collection of thermal energy is a major ***(TE)conversion technology based on the Seebeck effect and thermal energy storage technology based on phase change materials(PCMs)represent smart,feasible,and research-worthy approaches to overcome this ***,the integration of multiple thermal energy sources freely existing in the environment for storage and output of thermal and electrical energy simultaneously still remains a huge ***,three-dimensional(3D)nanostructured metal-organic frameworks(MOFs)are in situ nucleated and grown onto carbon nanotubes(CNTs)via coordination *** calcination,the prepared core-shell structural CNTs@MOFs are transformed into tightened 1D/3D carbon heterostructure loading Co nanoparticles for efficient solar-thermoelectric energy ***,the corresponding composite PCMs show a record-breaking solar-thermal conversion efficiency of 98.1%due to the tightened carbon heterostructure and the local surface plasmon resonance effect of Co ***,our designed all-in-one composite PCMs are also capable of creating an electrical potential of 0.5 mV based on the Seebeck effect without a TE *** promising approach can store thermal and electrical energy simultaneously,providing a new direction in the design of advanced all-in-one multifunctional PCMs for thermal energy storage and utilization.

关键词： carbon neutrality metal-organic framework phase change materials solar-thermoelectric conversion thermal energy storage

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Serrated lithium fluoride nanofibers-woven interlayer enables uniform lithium deposition for lithium-metal batteries

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National Science Review 2022年第11期9卷 194-207页

作者： Shuangshuang Tan Yalong Jiang Shuyan Ni Hao Wang Fangyu Xiong Lianmeng Cui Xuelei Pan Chen Tang Yaoguang Rong Qinyou An Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology College of Materials Science and Engineering Chongqing University Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory

The uncontrollable formation of Li dendrites has become the biggest obstacle to the practical application of Li-metal anodes in high-energy rechargeable Li batteries. Herein, a unique LiF interlayer woven by millimeter-level, single-crystal and serrated LiF nanofibers（NFs） was designed to enable dendrite-free and highly efficient Li-metal deposition. This high-conductivity Li F interlayer can increase the Li+transference number and induce the formation of 'Li F–NFs-rich' solid–electrolyte interface（SEI）. In the 'Li F–NFs-rich'SEI, the ultra-long Li F nanofibers provide a continuously interfacial Li+transport path. Moreover, the formed Li–LiF interface between Li-metal and SEI film renders low Li nucleation and high Li+migration energy barriers, leading to uniform Li plating and stripping processes. As a result, steady charge–discharge in a Li//Li symmetrical cell for 1600 h under 4 m Ah cm-2and 400 stable cycles under a high area capacity of 5.65 mAh cm-2in a high-loading Li//rGO–S cell at 17.9 mA cm-2could be achieved. The free-standing LiF –NFs interlayer exhibits superior advantages for commercial Li batteries and displays significant potential for expanding the applications in solid Li batteries.

关键词： lithium fluoride serrated nanofibers LiF interlayer uniform Li deposition lithium-metal batteries

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Bioinspired Centimeter-scale Sensor Free Obstacle-passing Robots with a Wireless Control System

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Journal of Bionic Engineering 2022年第4期19卷 953-964页

作者： Longxin Kan Zhenhua Wu Bo Song Bin Su Yusheng Shi State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina

Obstacle avoidance is of great importance for mobile robots since it provides protection for the robots’safety and ensures their routine *** are proven to play an important role in robots obstacle avoidance,and they are useful as ***,more sensors indicating additional space,larger weight load and more energy *** unnecessary sensors is conducive to the development of mobile robots and remains *** we demonstrate Sensor Free Obstacle-Passing Robots(SFOPRs)inspired by flies using the Obstacle-passing strategy instead of Obstacle *** ability to autonomously adjust its direction after hitting obstacles and the ability to continuously hit obstacles are 2 key problems that need to be solved to build this *** to arc-shaped head design and undulating motion behaviors,the robots can autonomously adjust their direction to the outline of obstacles,such as a 90°corner,dispersive irregular obstacles,and even an"S"type channel without the assistance of any ***,the caterpillar-like movement enables robots to continuously hit ***,collaborative awareness and mutual aid can be realized among two or more prototype robots,indicating simple yet functional units for future swarm *** study could provide a new strategy to pursue sensor-free obstacle-passing robots for future swarm robot applications.

关键词： Bioinspired Sensor Obstacle Swarm robots Untethered

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Nonadiabatic geometric phase in a doubly driven two-level system

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Chinese Physics B 2023年第5期32卷 314-320页

作者：刘伟新汪涛李卫东 Institute of Theoretical Physics and Department of Physics State Key Laboratory of Quantum Optics and Quantum Optics DevicesCollaborative Innovation Center of Extreme OpticsShanxi UniversityTaiyuan 030006China Department of Physics and Center of Quantum Materials and DevicesChongqing UniversityChongqing 401331China Chongqing Key Laboratory for Strongly Coupled Physics Chongqing 401331China Shenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology Center for Advanced Material Diagnostic Technologyand College of Engineering PhysicsShenzhen Technology UniversityShenzhen 518118China

We study theoretically the nonadiabatic geometric phase of a doubly driven two-level system with an additional relative phase between the two driving modes introduced in. It is shown that the time evolution of the system strongly depends on this relative phase. The condition for the system returning to its initial state after a single period is given by the means of the Landau–Zener–Stückelberg–Majorana destructive interference. The nonadiabatic geometric phase accompanying a cyclic evolution is shown to be related to the Stokes phase as well as this relative phase. By controlling the relative phase, the geometric phase can characterize two distinct phases in the adiabatic limit.

关键词： two-level system geometric phase Landau–Zener–Stückelberg–Majorana interference

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A flame-retardant binder with high polysulfide affinity for safe and stable lithium–sulfur batteries

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Science China Chemistry 2024年第3期67卷 1028-1036页

作者： Guowei Yu Guofeng Ye Cheng Wang Chenyang Wang Zhaoyun Wang Pu Hu Yu Li Xi-Xi Feng Shuang-Jie Tan Min Yan Sen Xin Zhitian Liu Hubei Key Laboratory of Plasma Chemistry and Advanced Materials Hubei Engineering Technology Research Center of Optoelectronic and New Energy MaterialsSchool of Materials Science and EngineeringWuhan Institute of TechnologyWuhan 430205China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China CAS Key Laboratory of Molecular Nanostructure and Nanotechnology CAS Research/Education Center for Excellence in Molecular SciencesBeijing National Laboratory for Molecular Sciences(BNLMS)Institute of ChemistryChinese Academy of Sciences(CAS)Beijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Lithium-sulfur(Li-S) batteries have shown promises for the next-generation, high-energy electrochemical storage, yet are hindered by rapid performance decay due to the polysulfide shuttle in the cathode and safety concerns about potential thermal runaway. To address the above challenges, herein, we show a flame-retardant cathode binder that simultaneously improves the electrochemical stability and safety of batteries. The combination of soft and hard segments in the polymer framework of binders allows high flexibility and mechanical strength for adapting to the drastic volume change during the Li(de)intercalation of the S cathode. The binder contains a large number of polar groups, which show the high affinity to polysulfides so that they help to anchor active S species at the cathode. These polar groups also help to regulate and facilitate the Li-ion transport, promoting the kinetics of polysulfide conversion reaction. The binder contains abundant phosphine oxide groups, which, in the case of battery's thermal runaway, decompose and release PO· radicals to quench the combustion reactions and stop the fire. Consequently, Li-S batteries using the new cathode binder show the improved electrochemical performance, including a low-capacity decay of 0.046% per cycle for 800 cycles at 1 C and favorable rate capabilities of up to 3 C. This work offers new insights on the practical realization of high-energy rechargeable batteries with stable storage electrochemistry and high safety.

关键词： lithium–sulfur battery polymer binder polysulfide affinity flame retardancy

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Effect of La addition on semi-solid microstructure evolution of Mg-7Zn magnesium alloy

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China Foundry 2022年第5期19卷 403-410页

作者： Zhan-yu Zhang Xiao-feng Huang Fan Yang Sheng Zhang Jiao-li Fu State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of TechnologyLanzhou 730050China

Semi-solid billets of Mg-7Zn and Mg-7Zn-0.3La alloys were prepared by semi-solid isothermal heat *** effects of the La element on the as-cast and semi-solid microstructures of Mg-7Zn alloy were ***,the effects of isothermal temperature and holding time on the evolution of the semi-solid microstructure of Mg-7Zn-0.3La alloy were also *** indicate that the addition of a small amount of La can significantly refine the as-cast and semi-solid *** the semi-solid thermal transformation,the size and shape factor of solid particles decrease at first and then increase with the increase of isothermal temperature and holding *** semi-solid microstructure of Mg-7Zn-0.3La alloy obtained by holding at 605℃ for 30 min is the *** average size of solid particles,shape factor,and solid fraction are 42μm,1.45 and 61.8%,*** the same time,a comparative study on the coarsening process of particles in the semi-solid billets of Mg-7Zn and Mg-7Zn-0.3La alloys reveals that the addition of La effectively decreases the coarsening rate of solid particles and restricts the growth of solid particles.

关键词： magnesium alloy La element semi-solid microstructure evolution coarsening rate constant

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Synergistic effect of gradient Zn content and multiscale particles on the mechanical properties of Al-Zn-Mg-Cu alloys with coupling distribution of coarse-fine grains

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International Journal of Minerals,Metallurgy and materials 2024年第6期31卷 1392-1405页

作者： Liangliang Yuan Mingxing Guo Yi Wang Yun Wang Linzhong Zhuang Institute of Effectiveness Evaluation of Flying Vehicle Beijing 100085China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China Beijing Laboratory of Metallic Materials and Processing for Modern Transportation University of Science and Technology BeijingBeijing 100083China

This study investigated the influence of graded Zn content on the evolution of precipitated and iron-rich phases and grain struc-ture of the alloys,designed and developed the Al–8.0Zn–1.5Mg–1.5Cu–0.2Fe(wt%)alloy with high strength and *** the increase of Zn content,forming the coupling distribution of multiscale precipitates and iron-rich phases with a reasonable matching ratio and dispersion distribution characteristics is *** phenomenon induces the formation of cell-like structures with alternate distribu-tion of coarse and fine grains,and the average plasticity–strain ratio(characterizing the formability)of the pre-aged alloy with a high strength is up to *** reveal the evolution and influence mechanisms of multiscale second-phase particles and the corresponding high formability mechanism of the *** developed coupling control process exhibits considerable potential,revealing remarkable improvements in the room temperature formability of high-strength Al–Zn–Mg–Cu alloys.

关键词： Al–Zn–Mg–Cu alloy iron-rich phase high formability microstructure mechanisms

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Elastic properties of Cu–6wt% Ag alloy wires for pulsed magnets investigated by ultrasonic techniques

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Chinese Physics B 2025年第2期34卷 90-95页

作者： Ziyu Li Tianyi Gu Wenqi Wei Yang Yuan Zhuo Wang Kangjian Luo Yupeng Pan Jianfeng Xie Shaozhe Zhang Tao Peng Lin Liu Qi Chen Xiaotao Han Yongkang Luo Liang Li Wuhan National High Magnetic Field Center Huazhong University of Science and TechnologyWuhan 430074China School of Physics Huazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and TechnologyWuhan 430074China School of Materials Science and Engineering State Key Laboratory for Materials Processing and Die&Mold TechnologyHuazhong University of Science and TechnologyWuhan 430074China

Conductor materials with good mechanical performance as well as high electrical and thermal conductivities are particularly important to break through the current bottle-neck limit(~ 100 T) of pulsed magnets. Here, we perform systematic studies on the elastic properties of the Cu–6wt% Ag alloy wire, which is a promising candidate material for the new-generation pulsed magnets, by employing two independent ultrasonic techniques, i.e., resonant ultrasound spectroscopy(RUS) and ultrasound pulse-echo experiments. Our RUS measurements manifest that the elastic properties of the Cu–6wt% Ag alloy wires can be improved by an electroplastic drawing procedure as compared with the conventional cold drawing. We also take this opportunity to test the availability of our newly-built ultrasound pulse-echo facility at the Wuhan National High Magnetic Field Center(WHMFC, China), and the results suggest that the elastic performance of the electroplastically-drawn Cu–6wt% Ag alloy wire remains excellent without anomalous softening under extreme conditions,e.g., in ultra-high magnetic field up to 50 T and nitrogen or helium cryogenic liquids.

关键词： high-field magnet Cu–Ag alloy ultrasonic techniques elastic constants

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