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Ultralight and compressive SiC nanowires aerogel for high-temperature thermal insulation

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Rare Metals 2023年第10期42卷 3354-3363页

作者： Jun-Xiong Zhang Jing Zhang Xin-Li Ye Xiao-Ming Ma Rong Liu Qi-Long Sun Yun-Lei Zhou School of textile and Clothing Nantong UniversityNantong226019China School of Civil Aviation Northwestern Polytechnical UniversityXi’an710072China National Equipment New Materials&technology(Jiangsu)Co. LtdSuzhou215101China Hangzhou institute of technology Xidian UniversityHangzhou311231China

Aerogels with excellent properties combination of ultralow density and great thermal insulation are drawing attention to applications in harsh *** aerogels,however,are usually constructed with nanoparticles with a weakness in physical *** silicon carbide nano wire(SiC_(NW)) is a kind of one-dimensional(1D) nano wire possessing the promising properties of flexibility,great thermal insulation,and stability at high *** aerogel constructed by the SiC_(NW) will produce a great material with a promising material,the amazing SiC_(NW) ***,a novel SiC_(NW) aerogel was fabricated consisting of quantities of β-SiC_(NW) of15-40 nm in diameter and tens to hundreds of micrometers in *** SiC_(NW) aerogel possessed an ultralow density of 5.82 mg·cm^(-3),high-temperature resistance,and great thermal insulation with its thermal conductivities of0.063 W·m^(-1)·K^(-1) at 100℃ and 0.243 W·m^(-1)·K^(-1) at900℃ in ***,the thermal insulation applicability of this aerogel was *** study provides a promising way for designing and fabricating other multifunctional nanowire aerogels for high-temperature thermal insulation.

关键词： SiC nanowires Aerogel Thermal insulation Thermal conductivity

Preparation and microwave absorption performance of SiC aerogel via sol-gel and carbonization reduction process

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Defence technology（防务技术） 2024年第12期42卷 73-82页

作者： Xinli Ye Pengyi Xu Hao Yu Shan Li Xiaomin Ma Wei Xu Junxiong Zhang School of Civil Aviation Northwestern Polytechnical UniversityXi'an 710072China research&Development institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518057China Yangtze River Delta research institute of Northwestern Polytechnical University Suzhou 215400China National Equipment New Material&technology(Jiangsu)Co. LtdSuzhou 215400China Xi'an Electronic Engineering research institute Xi'an 710100China School of textile and Clothing Nantong UniversityNantong 226019China

SiC aerogel presents several advantageous features like lightweight and high temperature resistance when applied as microwave absorbing *** this paper,SiC aerogel was prepared eventually followed by the sol-gel and carbonization reduction *** results showed that the effective electromagnetic microwave absorption capacity of SiC aerogel was highly increased after being pyrolyzed at 1500℃,which presented a minimum reflection loss value of-57.80 dB at 3.10 mm and 9.86 ***,the electromagnetic parameters of SiC aerogel with different paraffin ratios were discussed as well as the varying electromagnetic microwave absorption *** minimum reflection loss value first rose then fell as the SiC/paraffin ratio increased,which demonstrated the importance of SiC *** study establishes the theoretical foundation for the subsequent functional application of SiC aerogel.

关键词： SiC aerogel Microwave absorbing SiC/Paraffin ratio Functional applications

Strong interaction and confine effect of manganese oxide-cobalt embedded in self-templated nitrogen-doped carbon enable ultra-stable zinc-air batteries

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Progress in Natural Science:Materials International 2023年第3期33卷 328-334页

作者： Zhongce Hu Taoyi Shen Xiang Chen Zhenhua Yan Tiandi Pan Houyong Yu College of textile Science and Engineering (International institute of silk) Zhejiang Sci-Tech University Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) College of Chemistry Nankai University

Developing efficient bifunctional oxygen electrocatalysts with high stability is of great significance for the implementation of rechargeable Zn–air batteries. Herein, MOC-NC bifunctional electrocatalyst with active Mn O–Co components embedded in the N-doped carbon sphere is prepared by facile hydrothermal conversion and post-pyrolysis process. The strong interaction between Mn O and Co, and confine effect induced by the microstructure endow the fabricated MOC-NC composite with modified electronic configuration, improved conductivity, and significantly reinforced stability. Consequently, the MOC-NC electrocatalyst exhibits good activity and ultrahigh stability for oxygen electrocatalysis. Moreover, when the catalyst was applied to the cathode electrode for the zinc-air battery, it shows excellent performance(specific capacity of 718 Wh kgZn-1, power density of 152.3mW cm-2) and extraordinary long-term stability(after 200 h of charge and discharge cycling, the round-trip efficiency still maintains at 44%). The present work demonstrates a strategy for synthesizing ultrastable bifunctional non-precious metal electrocatalysts for oxygen electrocatalysis.

关键词： Zinc-air batteries Electrocatalyst Bifunctional Hybrid

Tree Ring‑Inspired Fibrous Helix for UV Shielding and Warning Based on Photo‑electricity‑Acoustic Energy Conversion

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Advanced Fiber Materials 2023年第2期5卷 681-693页

作者： Yan Wang Ziyi Guo Jie Xiong Jingchong Liu Yong Zhao Fengyun Guo Key Laboratory of Intelligent textile and Flexible Interconnection of Zhejiang Province School of Textile Science and Engineering(International Silk Institute)Zhejiang Sci-Tech UniversityHangzhou 310018China Key Laboratory of Bioinspired Intelligent Interface Science and technology Ministry of Education School of Chemistry Beihang UniversityBeijing 100191China Beijing Key Laboratory for Bioengineering and Sensing technology Daxing Research InstituteSchool of Chemistry and Biological EngineeringUniversity of Science and Technology BeijingBeijing 100083China

Flexible wearable ultraviolet(UV)shielding,monitoring and warning devices have important applications in civil and mili-tary ***,most flexible wearable UV devices show unsatisfactory performance due to their poor stability and easy failure at large ***,inspired by tree rings,we engineered a hierarchical composite nanofibrous helix with an alternately stacked Archimedes spiral structure via a cost-effective *** on a photo-electricity-acoustic energy conversion system,we fabricated an all-in-one device exhibiting strain-insensitive UV protection at 0–500%strain for UV shielding as well as strain-sensitive UV monitoring at 500–1500%strain for UV early *** with previously reported common nanofibrous membrane devices,the as-prepared composite nanofibrous helix shows great advantages in terms of stability and UV protection,especially at large ***,the helix demonstrates multiple functions of wear resistance,antibacterial properties,biodegradation and *** versatile strategy holds great promise for wearable electronics and multifunctional devices.

关键词： Electrospinning Nanofibrous helix Energy conversion UV shielding and warning Multifunction Flexible electronics

Hierarchical charge distribution controls self-assembly process of silk in vitro

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Frontiers of Materials Science 2015年第4期9卷 382-391页

作者： YiZHANG Cencen ZHANG Lijie LIU David L. KAPLAN Hesun ZHU Qiang LU National Engineering Laboratory for Modern silk & Collaborative Innovation Center of Suzhou Nano Science and technology Soochow University Suzhou 215123 China College of textile and Clothing Engineering Soochow University Suzhou 215123 China Department of Biomedical Engineering Tufts University Medford MA 02155 USA textile College Henan Institute of Engineering Zhengzhou 450007 China research Center of Materials Science Beijing Institute of Technology Beijing 100081 China

silk materials with different nanostructures have been developed without the understanding of the inherent transformation mechanism. Here we attempt to reveal the conversion road of the various nanostructures and determine the critical regulating factors. The regulating conversion processes influenced by a hierarchical charge distribution were investigated, showing different transformations between molecules, nanoparticles and nanofibers. Various repulsion and compressive forces existed among silk fibroin molecules and aggregates due to the exterior and interior distribution of charge, which further controlled their aggregating and deaggregating behaviors and finally formed nanofibers with different sizes. Synergistic action derived from molecular mobility and concentrations could also tune the assembly process and final nanostructures, it is suggested that the complicated silk fibroin assembly processes comply a same rule based on charge distribution, offering a promising way to develop silk-based materials with designed nanostructures.

关键词： silk self-assembly charge nanostructure nanofiber

Calotropis gigantea Fiber‑Based Sensitivity‑Tunable Strain Sensors with Insensitive Response to Wearable Microclimate Changes

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Advanced Fiber Materials 2023年第4期5卷 1378-1391页

作者： Junze Zhang Jing Liu Zeyu Zhao Weiwei Sun Gaojuan Zhao Jingge Liu Jianchu Xu Yuling Li Zekun Liu Yi Li Gang Li National Engineering Laboratory for Modern silk College of Textile and Clothing EngineeringSoochow UniversitySuzhou 215123China Jiangsu Advanced textile Engineering technology Center Nantong 226007China Honghe Center for Mountain Futures Kunming Institute of BotanyChinese Academy of SciencesHonghe CountyYunnan 654412China Key Laboratory of textile Science and technology Ministry of EducationDonghua UniversityShanghai 201620China Department of Materials University of ManchesterOxford RoadManchester M139PLUK Botnar research Center University of OxfordOld RoadHeadington OX37LDOxfordUK

Wearable tensile strain sensors have attracted substantial research interest due to their great potential in applications for the real-time detection of human motion and health through the construction of body-sensing *** devices,however,are constantly demonstrated in non-real world scenarios,where changes in body temperature and humidity are ignored,which results in questionable sensing accuracy and reliability in practical *** this work,a fabric-like strain sensor is developed by fabricating graphene-modified Calotropis gigantea yarn and elastic yarn(***)into an independently crossed structure,enabling the sensor with tunable sensitivity by directly altering the sensor *** sensor possesses excellent breathability,allowing water vapor generated by body skin to be discharged into the environment(the water evaporation rate is approximately 2.03 kg m^(-2) h^(-1))and creating a pleasing microenvironment between the sensor and the skin by avoiding the hindering of perspiration *** importantly,the sensor is shown to have a sensing stability towards changes in temperature and humidity,implementing sensing reliability against complex and changeable wearable *** wearing the sensor at various locations of the human body,a full-range body area sensing network for monitoring various body movements and vital signs,such as speaking,coughing,breathing and walking,is successfully *** provides a new route for achieving wearing-comfortable,high-performance and sensing-reliable strain sensors.

关键词： Wearable strain sensor Functionalized Calotropis gigantea fiber Wearable microclimate Graphene coating Tunable sensitivity

Interface Engineering on Constructing Physical and Chemical Stable Solid-State Electrolyte Toward Practical Lithium Batteries

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Energy & Environmental Materials 2024年第4期7卷 28-47页

作者： Honggang He Litong Wang Malek Al-Abbasi Chunyan Cao Heng Li Zhu Xu Shi Chen Wei Zhang Ruiqing Li Yuekun Lai Yuxin Tang Mingzheng Ge School of textile and Clothing Nantong UniversityNantong 226019China School of Science Qingdao University of TechnologyQingdao 266520China Department of Biomedical Sciences City University of Hong KongHong Kong 999077China institute of Applied Physics and Materials Engineering University of MacaoMacao 999078China College of Chemical Engineering Fuzhou UniversityFuzhou 350116China

Solid-state lithium batteries(SSLBs)with high safety have emerged to meet the increasing energy density demands of electric vehicles,hybrid electric vehicles,and portable electronic ***,the dendrite formation,high interfacial resistance,and deleterious interfacial reactions caused by solid-solid contact between electrode and electrolyte have hindered the commercialization of ***,in this review,the state-of-the-art developments in the rational design of solid-state electrolyte and their progression toward practical applications are ***,the origin of interface instability and the sluggish charge carrier transportation in solid-solid interface are ***,various strategies toward stabilizing interfacial stability(reducing interfacial resistance,suppressing lithium dendrites,and side reactions)are summarized from the physical and chemical perspective,including building protective layer,constructing 3D and gradient structures,***,the remaining challenges and future development trends of solidstate electrolyte are *** review provides a deep insight into solving the interfacial instability issues and promising solutions to enable practical high-energy-density lithium metal batteries.

关键词： dendrite formation high energy density interface instability interfacial resistance solid-state electrolyte

A study of the initial adhesive force of cells on silk fibroin-based materials using micropipette aspiration

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Regenerative Biomaterials 2018年第3期5卷 151-157页

作者： Xiaojie Lian Shichao Liu Liming Liu Rui Xu Miaomiao Du Song Wang Hesun Zhu Qiang Lu Quanyou Zhang Yali Wu Di Huang Yan Wei Department of Biomedical Engineering Research Center for Nano-Biomaterials and Regenerative MedicineCollege of MechanicsTaiyuan University of TechnologyTaiyuan 030024China Shanxi Key Laboratory of Material Strength and Structural Impact Institute of Applied Mechanics and Biomedical EngineeringTaiyuan University of TechnologyTaiyuan 030024China research Center of Materials Science School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China National Engineering Laboratory for Modern silk College of Textile and Clothing EngineeringSoochow UniversitySuzhou 215123China

With the development of biomaterials,more attention is paid to the adhesion characteristics between cells and *** is necessary to study the adhesive force with a suitable *** fibroin(SF)is widely investigated in biomedical application due to its novel biocompatibility and mechanical *** this article,the micropipette aspiration method and measurement pattern of uniform cells in round shape(UCR)was used to study the initial adhesive force of three types of cells on pure silk fibroin films(SFFs).We also compared the adhesive forces of modified SFFs with that of pure *** results of adhesive force in the initial adhesive stage were in concordance with the results of MTT assay andmicroscope observation,which were confirmed by the above three cell lines and four kinds of *** results indicated UCR was an efficient and quantitative measurement pattern in initial adhesion *** article also provides a useful method in identifying initial cell-materials interactions.

关键词： silk-based materials cell initial adhesion micropipette uniform cells in round shape

Encrypted Finite-Horizon Energy-to-Peak State Estimation for Time-Varying Systems Under Eavesdropping Attacks: Tackling Secrecy Capacity

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IEEE/CAA Journal of Automatica Sinica 2023年第4期10卷 985-996页

作者： Lei Zou Zidong Wang Bo Shen Hongli Dong Guoping Lu College of Information Science and technology Donghua UniversityShanghai 201620 Engineering research Center of Digitalized textile and Fashion technology Ministry of EducationShanghai 201620China College of Electrical Engineering and Automation Shandong University of Science and TechnologyQingdao 266590China Department of Computer Science Brunel University LondonUxbridgeMiddlesex UB83PHUK Intelligence Energy research institute Northeast Petroleum UniversityDaqing 163318 Heilongjiang Provincial Key Laboratory of Networking and Intelligent Control Northeast Petroleum UniversityDaqing 163318 Sanya Offshore Oil&Gas research institute Northeast Petroleum UniversitySanya 572024China School of Electrical Engineering Nantong UniversityNantong 226019China

This paper is concerned with the problem of finitehorizon energy-to-peak state estimation for a class of networked linear time-varying *** to the inherent vulnerability of network-based communication,the measurement signals transmitted over a communication network might be intercepted by potential *** avoid information leakage,by resorting to an artificial-noise-assisted method,we develop a novel encryption-decryption scheme to ensure that the transmitted signal is composed of the raw measurement and an artificial-noise term.A special evaluation index named secrecy capacity is employed to assess the information security of signal transmissions under the developed encryption-decryption *** purpose of the addressed problem is to design an encryptiondecryption scheme and a state estimator such that:1)the desired secrecy capacity is ensured;and 2)the required finite-horizon–l_(2)-l_(∞)performance is *** conditions are established on the existence of the encryption-decryption mechanism and the finite-horizon state ***,simulation results are proposed to show the effectiveness of our proposed encryption-decryption-based state estimation scheme.

关键词： Artificial-noise-assisted technique eavesdropping encryption-decryption scheme energy-to-peak state estimation finitehorizon state estimation