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Flexible Fly-Eye-Shaped Triboelectric Nanogenerator for All Directions and Highly Efficient Biomechanical Energy Harvesting and Human Motion Monitoring

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SSRN 2024年

作者： Yan, Dali Tao, Dan Xu, Duo Sun, Yirong Deng, Bo Cao, Genyang Fang, Jian Xu, Weilin State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Hubei Wuhan430200 China College of Textile and Clothing Engineering Soochow University Suzhou215123 China

As an environmentally friendly and renewable energy source, triboelectric nanogenerator (TENG) offers a fresh solution to the energy scarcity problem. However, the conventional three-dimensional (3D) TENG, which exhibits heavy angular dependence in energy harvesting, struggles to efficiently capture complex biological kinetic energy in practical applications. This study addresses this challenge by developing a novel flexible fly-eye-shaped triboelectric nanogenerator (F-TENG). In comparison with traditional 3D flexible-based TENG, this generator notably minimizes the angular dependence on motion direction. Particularly for non-vertical mechanical energy harvesting, F-TENG can enhance collection efficiency by 35.5%. Experimental results demonstrate that the open-circuit voltage and current of F-TENG textiles are 3-fold and 2.6-fold higher, respectively than those of conventional 3D flexible-based TENG. Its accuracy in detecting and identifying complex motions reaches 86.8%, marking a 37.8% improvement over traditional 3D-TENG. This study presents a promising perspective on the structural design of all directions and highly efficient biomechanical energy harvesting and its application in the field of intelligent sensing. © 2024, The Authors. All rights reserved.

关键词： textiles

Body-Comfort Cellulose Acetate-Based textiles-Triboelectric Nanogenerators with Radiation Cooling and Moisture Permeability

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SSRN 2024年

作者： Xu, Mei Chen, Zhicheng Hu, Ziyao Zhou, Cheng Fu, Xinming Song, Yiheng Wen, Xianjie Wang, Jinfeng Yin, Xianze College of Materials Science and Engineering National Local Joint Laboratory for Advanced Textile Processing and Clean Production Wuhan Textile University Wuhan430200 China Department of Anesthesiology The Second People’s Hospital of Foshan City Guangdong Province Foshan528000 China State Key Laboratory of New Textile Materials & Advanced Processing Technology Wuhan Textile University 430200 China

Wearable textile-triboelectric nanogenerators (t-TENGs) faced impediments in terms of the inadequate heat dissipation and moisture permeability performance. Specifically, actively heat-dissipating TENG devices exhibited intricacies, while passively heat-dissipating t-TENGs were considered unsatisfactory in sustaining optimal body temperature ranges for comfort. Herein, solvent-free titanium dioxide nanofluids (TiO2 nfs) were prepared to in-situ enhance the radiation cooling performance of electrospun TiO2 nfs@cellulose acetate (TiO2 nfs@CA) t-TENGs by grafting flexible chains on the TiO2 surface. TiO2 in the core layer of TiO2 nfs enhanced the infrared emission, hydrophilicity, and dielectric properties of TiO2 nfs@CA t-TENGs. Moreover, TiO2 nfs demonstrated a phase transition by absorbing energy within the physiological temperature ranges of the human body. TiO2 nfs enhanced the infrared emission, hydrophilicity, and dielectric properties of TiO2 nfs@CA t-TENGs by grafting flexible long chains ion on the TiO2 surface. The large-scale fabricated TiO2 nfs@CA membranes showcased remarkable radiation cooling performance (dropped 4 °C ~ 8 °C under 45 °C environments) in authentic and humid environments (like indoors, house and car). And TiO2 nfs@CA endowed a substantial enthalpy change within body temperature ranges, manifesting an exceptionally comfortable skin temperature (34 °C ~ 38 °C) even under scorching sunlight. Besides, TiO2 nfs@CA t-TENGs accurately monitored and pridicted foot movements in humid and enclosed environments by support vector machine (SVM). This made it promising as self-powered wearable devices. TiO2 nfs@CA t-TENGs provided a novel strategy for large scale fabricating of t-TENGs with comfort. © 2024, The Authors. All rights reserved.

关键词： textiles

Integrating thin wall into block:A new scanning strategy for laser powder bed fusion of dense tungsten

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Journal of materials Science & technology 2022年第25期120卷 167-171页

作者： Zhengang Xiong Ji Zou Zhaoyang Deng Jinhan Chen Wei Liu Yuchi Fan Minshi Wang Xiaoqing Zhao Chunfeng Yu Dongdong Dong Wenyou Ma Weimin Wang Zhengyi Fu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Institute of New Materials Guangdong Academy of SciencesGuangzhou 510650China School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China Institute of Functional Materials Donghua University201620China School of Metallurgy and Materials University of BirminghamBeijing 100084China

Due to a combination of outstanding properties including high melting point,high density,low thermal expansion coefficient,low saturated vapor pressure and excellent thermal conductivity,tungsten(W)parts have been widely used as electrodes,heating elements,anti-scatter grids for Computed Tomography(CT)equipment,rocket nozzles and divertor materials for nuclear fusion[1].

关键词： powder thermal saturated

Body-Comfort Cellulose Acetate-Based textiles-Triboelectric Nanogenerators with Radiation Cooling and Moisture Permeability

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SSRN 2024年

关键词： textiles

In situ converting the native passivation layer into a fast ion transport interphase to boost the stability of zinc anodes

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Green Energy and Environment 2025年

作者： Xie, Zi-Long Zhu, Yunhai Du, Jia-Yi Yang, Dong-Yue Chen, Hao Wang, Zhi Huang, Gang Zhang, Xin-Bo State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun130022 China School of Applied Chemistry and Engineering University of Science and Technology of China Hefei230026 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China

Aqueous zinc batteries offer significant potential for large-scale energy storage, wearable devices, and medium-to low-speed transportation due to their safety, affordability, and environmental friendliness. However, the uneven zinc deposition at the anode side caused by localized reaction activity from the passivation layer presents challenges that significantly impact the battery's stability and lifespan. In this study, we have proposed an expandable and maneuverable gel sustained-release (GSR) treatment to polish the Zn metal, which in situ converts its native passivation layer into a composite interphase layer with nanocrystal zinc phosphate and flexible polyvinyl alcohol. Such a thin and uniform interface contributes to fast and homogeneous Zn ion transport and improved anti-corrosion ability, enabling uniform zinc deposition without dendrite growth and thereby improving the battery performance with high-rate ability and long cycle life. This GSR treatment method, characterized by its simplicity, low cost, and universality, facilitates the widespread application of aqueous zinc batteries. © 2025 Institute of Process Engineering, Chinese Academy of Sciences

关键词： Passivation

The Forming Mechanism and Optimizing of Natural Polymer Foam Based on Magnolol Extracted from Chinese Herbal Medicine

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SSRN 2025年

作者： Zhang, Naidan Zhao, Huawang Feng, Minyuan Wang, Yu Matshazi, Bekezela Liu, Haofeng Xu, Weilin Zhuang, Yan Yang, Hongjun College of Materials Science and Engineering Wuhan Textile University Wuhan430200 China College of Textile Science and Engineering Wuhan Textile University Wuhan430200 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China

Magnolol a Chinese medicinal herb that has been used for treating cough, phlegm and inflammation for a thousand years. Appreciating its low absorption rate that limits its use, there is need to develop porous magnolol foams that are light weight, low density, portable while maintaining tissue integrity to expand its application. This study proposes an innovative method for creating a biocompatible foam through a one-pot process involving reacting magnolol with sulfhydryl compounds, utilizing a thiol-ene click reaction to create a foam. Various foams were systematically formulated by adjusting the degrees of cross-linking, concentrations of the foaming agent 2,2'-azobis(2-methylpropionitrile) (AIBN), and the temperature and pressure conditions during the foaming. AIBN acted both as a blowing agent and initiator, triggering cross-linking in the polymer solution by releasing free radicals and nitrogen gas. This initiated rapid expansion when a critical viscosity threshold was reached, ultimately curing the foam. The optimal foaming efficiency was achieved when the molar ratio of allyl to mercapto groups was maintained at 1:1, pentaerythritol tetrakis(3-mercapto-propionate) (PETMP) identified as the optimal sulfhydryl compound. Increasing the dosage of AIBN enhanced gas generation, further expanding foam volume, pore size and porosity, the foam is lightest when the amount of AIBN is 7.5%. When magnolol-based foams were prepared under sealed conditions at 100°C, without external pressure, they exhibited large, uniformly distributed pores and excellent water-absorbing properties. Moreover, the resulting foams demonstrated remarkable thermal stability and resilience. These findings offer a new design strategy for engineering high-performance functional magnolol foams with high biomass content. © 2025, The Authors. All rights reserved.

关键词： Free radicals

Porous Carbon Fibers -Stacked Multiscale Structures for High-Performance and Multifunctional Electromagnetic Interference Shielding

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SSRN 2024年

作者： Pan, Heng Qing, Shuyi Lyu, Pei Ren, Jie Ran, Qi Hou, Jun Wang, Zilong Xia, Liangjun Zhang, Xiaofang Liu, Xin Xu, Weilin State Key Laboratory of New Textile Materials ＆ Advanced Processing Technologies Wuhan Textile University Wuhan430200 China School of Materials Science and Engineering Wuhan Institute of Technology Wuhan430205 China School of Materials Science and Engineering Wuhan Textile University Wuhan430200 China

The rapid development of next-generation portable electronic devices urgently requires lightweight and multifunctional electromagnetic interference (EMI) shielding materials with robust performance and high durability in harsh conditions, yet it remains extremely challenging. In this work, porous carbon fibers (PCFs) featuring the interconnected nano-scaled pores on surface and the internal micron-sized pores, were prepared and stacked into multi-layer carbon films, that further introduces the in-of-plane porous network and out-of-plane interlayer space. Such multi-scaled porous structure brings beneficial effects to carbon films including low density, consecutively conductive pathway, and excellent electromagnetic wave absorption capability. . As a result, the resulting carbon films demonstrate an impressive EMI shielding effectiveness up to 90 dB in the X band at a very low density of 0.19 g cm-3, presenting shielding performance superior to commercial metal counterparts, as well as significantly outperforming most of the reported carbon-based EMI shielding materials. Furthermore, the stacked carbon films are structural stable and robust, capable of delivering high EMI shielding performance tolerance to extreme environments, like acid/basic treatments, cryogenic (-196 °C) or high (250 °C) temperatures, and hygrothermal environment. Additionally, as-fabricated multi-layer carbon films demonstrates outstanding adsorption capacity for organic solvents and charge storage capacity. This study offers a facile yet feasible strategy for preparing advanced materials to address the EMI problems of next-generation electronic devices in a more economical and environmentally friendly manner. © 2024, The Authors. All rights reserved.

关键词： Carbon fibers

Flexible and Free-Standing Mxene Decorated Biomass-Derived Carbon Cloth Membrane Anodes for Superior Lithium-Ion Capacitors

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SSRN 2024年

作者： Luo, Lei Lu, Daokun Li, Siqi Shi, Naman Liu, Jie Xu, Changhua Sha, Sha Zhang, Ruquan Cai, Guangming Zhu, Jiadeng State Key Laboratory of New Textile Materials and Advanced Processing Technology School of Textile Science and Engineering Wuhan Textile University Wuhan430200 China Chemical Sciences Division Oak Ridge National Laboratory Oak RidgeTN37831 United States

Two-dimensional transition metal materials, MXenes, have attracted tremendous attention in energy storage applications due to their layered structure, good electrical conductivity, and abundant functional groups. In this work, Ti3C2Tx MXene nanosheets and carbon nanotubes (CNTs) were uniformly sprayed and successfully loaded on the cotton nonwoven fabric-derived carbon cloth (CC) substrate by electrostatic self-assembly. The as-prepared flexible MXene-CNTs-CC membrane electrodes with enlarged interlayer spacing and high conductivity fabric support exhibited excellent electrochemical performance. In terms of lithium-ion batteries, the optimized MXene-CNTs-CC anode delivered an ultrahigh initial discharge capacity of 2277.5 mAh g-1 at 0.1 A g-1 along with notable cyclability (1149.8 mAh g-1 after 100 cycles) and rate capability (544.1 mAh g-1 after 200 cycles at 2 A g-1) in half cells. The full cells assembled with LiCoO2 cathode also displayed good cycling stability with a high reversible discharge capacity of 833.5 mAh g-1 after 100 cycles at 0.1 A g-1. Remarkably, the further constructed lithium-ion capacitors with the designed porous carbon nanofiber cathode could maintain energy densities of 121.5 to 20.8 Wh kg-1 with the corresponding power densities of 125 to 12500 W kg-1, and achieved capacitance retention of 76.3% after 10000 cycles at 1 A g-1, demonstrating excellent long-term cycle durability. © 2024, The Authors. All rights reserved.

关键词： Lithium-ion batteries

Preparation and Properties of Silk Fibroin Electro Hydrogels via a Low Voltage Electrostatic Field

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Preparation and Properties of Silk Fibroin Electro Hydrogels...

2020 Sustainability Innovation and Fashion technology International Conference, SIFTIC 2020

作者： Zhou, Shuiqing Wang, Qiusheng Chen, Shixian Hu, Zhanao Yan, Shuqin Zhang, Qiang State Key Laboratory of New Textile Materials and Advanced Processing Technologies School of Textile Science and Engineering Wuhan Textile University Wuhan430200 China

Protein hydrogels is an important biomaterial for soft tissue repair in biomedical applications. However, the most extracellular matrixes are structured and ordered, the morphology of common hydrogels are of random network structures that impeded their applications in tissue engineering. In this study, silk fibroin hydrogels with different morphologies (i.e., microspheres, regularized beads, nano/micro fibers, intertwined networks, and multi-walls) were prepared under low voltage electrostatic fields by regulating the concentration of silk fibroin solution. Additionally, their stability can be regulated with further processing routes to satisfy the tailored requirements for different applications. Fourier transform infrared spectrometer (FTIR) and X-ray diffraction (XRD) provided evidence of the stability of silk fibroin electro materials was tuned by this method effectively. Therefore, these silk fibroin electro hydrogels with various morphologies, high orientation, and stability-regulatable properties provided a promising candidate for tissue engineering. © Published under licence by IOP Publishing Ltd.

关键词： Hydrogels