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Biodegradable, Super-Strong, and Conductive Cellulose Macrofibers for Fabric-Based Triboelectric Nanogenerator

Nano-Micro Letters 2022年第7期14卷 157-176页

作者： Sanming Hu Jing Han Zhijun Shi Kun Chen Nuo Xu Yifei Wang Ruizhu Zheng Yongzhen Tao Qijun Sun Zhong Lin Wang Guang Yang College of Life Science and Technology Huazhong University of Science and TechnologyWuhan 430074People’s Republic of China Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 101400People’s Republic of China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049People’s Republic of China Center On Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanning 530004People’s Republic of China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332-0245USA State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200People’s Republic of China

Electronic fibers used to fabricate wearable triboelectric nanogenerator(TENG) for harvesting human mechanical energy have been extensively explored. However, little attention is paid to their mutual advantages of environmental friendliness, mechanical properties, and stability. Here, we report a super-strong, biodegradable, and washable cellulose-based conductive macrofibers, which is prepared by wet-stretching and wet-twisting bacterial cellulose hydrogel incorporated with carbon nanotubes and polypyrrole. The cellulose-based conductive macrofibers possess high tensile strength of 449 MPa(able to lift 2 kg weights), good electrical conductivity(~ 5.32 S cm^(-1)), and excellent stability(Tensile strength and conductivity only decrease by 6.7% and 8.1% after immersing in water for 1 day). The degradation experiment demonstrates macrofibers can be degraded within 108 h in the cellulase solution. The designed fabric-based TENG from the cellulose-base conductive macrofibers shows a maximum open-circuit voltage of 170 V, short-circuit current of 0.8 μA, and output power at 352 μW, which is capable of powering the commercial electronics by charging the capacitors. More importantly, the fabric-based TENGs can be attached to the human body and work as self-powered sensors to effectively monitor human motions. This study suggests the potential of biodegradable, super-strong, and washable conductive cellulose-based fiber for designing eco-friendly fabric-based TENG for energy harvesting and biomechanical monitoring.

关键词： Biodegradable Conductive macrofiber Fabric-based TENG Energy harvesting Self-powered sensors

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When liquid crystals encounter structured light 20

When liquid crystals encounter structured light

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Emerging Liquid Crystal Technologies XX 2025

作者： Zhou, Le Liu, Yuanfeng Neyts, Kristiaan Shen, Yang Sun, Jingbo Zhou, Ji Physics Department Colorado School of Mines 1523 Illinois St. GoldenCO80401 United States School of Materials Science and Engineering State Key Laboratory of New Ceramics and Fine Processing Tsinghua University Beijing100084 China Department of Electronic and Computer Engineering State Key Laboratory of Advanced Displays and Optoelectronics Technologies The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong

ISBN: (纸本)9781510685222

Structured light refers to the light field tailored by various degrees of freedom including intensity, phase, and polarization states in both spatial and temporal domains, which may greatly vitalize the technologies in both optics, such as the next-generation optical communication as well as imaging and the materials science in both fabrications and characterizations. The structured characteristics of the structure light need materials also with structured optical properties that can generate or manipulate structured light in a straightforward way, which can be well satisfied by liquid crystals or glassy liquid crystals such as special spherulites. © 2025 SPIE.

关键词： Degrees of freedom (mechanics)

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Designing polymer nanocomposites with high energy density using machine learning

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npj Computational materials 2021年第1期7卷 999-1007页

作者： Zhong-Hui Shen Zhi-Wei Bao Xiao-Xing Cheng Bao-Wen Li Han-Xing Liu Yang Shen Long-Qing Chen Xiao-Guang Li Ce-Wen Nan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and DevicesWuhan University of TechnologyWuhanChina International School of Materials Science and Engineering Wuhan University of TechnologyWuhanChina Hefei National Laboratory for Physical Sciences at the Microscale Department of Physics and CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics University of Science and Technology of China HefeiChina Department of Materials Science and Engineering The Pennsylvania State UniversityUniversity ParkPAUnited States School of Materials Science and Engineering State Key Lab of New Ceramics and Fine ProcessingTsinghua UniversityBeijingChina

Addressing microstructure-property relations of polymer nanocomposites is vital for designing advanced dielectrics for electrostatic energy ***,we develop an integrated phase-field model to simulate the dielectric response,charge transport,and breakdown process of polymer ***,based on 6615 high-throughput calculation results,a machine learning strategy is schemed to evaluate the capability of energy *** find that parallel perovskite nanosheets prefer to block and then drive charges to migrate along with the interfaces in x-y plane,which could significantly improve the breakdown strength of polymer *** verify our predictions,we fabricate a polymer nanocomposite P(VDF-HFP)/Ca_(2)Nb_(3)O_(10),whose highest discharged energy density almost doubles to 35.9 J cm^(−3) compared with the pristine polymer,mainly benefit from the improved breakdown strength of 853 MVm^(−1).This work opens a horizon to exploit the great potential of 2D perovskite nanosheets for a wide range of applications of flexible dielectrics with the requirement of high voltage endurance.

关键词： polymer energy perovskite

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原位技术监测界面水解离

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Science Bulletin 2024年第10期69卷 1355-1358页

作者：高修博李静阳晓宇 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing&Shenzhen Research Institute&Laoshan Laboratory Wuhan University of TechnologyWuhan 430070China Hubei Province Key Laboratory of Coal Conversion and New Carbon Materials School of Chemistry and Chemical EngineeringWuhan University of Science and TechnologyWuhan 430081China School of Engineering and Applied Sciences Harvard UniversityCambridge MA02138USA

Most chemical and physical properties of water are related to its dynamic network of hydrogen *** between interfacial water and surfaces of solids often determine the functions and properties of natural and technological processes[1].These interactions are especially important in governing the electrocatalyst promoted hydrogen evolution reaction(HER)in water,which is an interfacial process that has particular significance in the development of hydrogen as a storable energy source.

关键词：原位技术 hydrogen 水解离

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Integrally Moldable Carbon Fiber Evaporator Using a Weaving Process for Efficient and Stable Solar Water Desalination

SSRN

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SSRN 2024年

作者： Yao, Jinyong Feng, Minyuan Zhang, Naidan Zhou, Yongheng Saeed, Haroon A.M. Xu, Weilin Li, Jianquan Yang, Hongjun College of Materials Science and Engineering Wuhan Textile University Wuhan430200 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China Winner Medical Co. Ltd. Shenzhen518109 China

The depletion of freshwater resources has become a major global concern. Various promising solar evaporation systems have been proposed;however, they face challenges in terms of adaptability, versatility, and simplicity, which limit their industrial feasibility. To enhance the efficiency of interfacial solar steam evaporation systems based on carbon fibers and utilize industrial technology, a carbon-cotton fabric (CCF) with a well-defined structure was successfully developed through traditional textile weaving techniques. This fabric can be easily processed into different shapes, including flat (CCF-), V-shaped (CCF-V), W-shaped (CCF-W), and O-shaped (CCF-O) structures, allowing for variations in solar thermal evaporation rates and efficiencies. This method provides a strategic approach for investigating the impact of shape on solar thermal evaporation behavior. The experimental data show that the CCF-O sample exhibited a favorable photothermal evaporation rate of 2.29 kg m-2 h-1. Subsequently, the diameter of CFF-O was adjusted to achieve an optimal balance between the water delivery and evaporation rates to improve the solar utilization efficiency. An evaporator with a diameter of 4 cm achieved an evaporation efficiency of 150.3%. This moldable fabric demonstrates promising potential for use in desalination and wastewater purification, offering a unique opportunity to enhance the efficiency, versatility, and portability of solar evaporation technologies. © 2024, The Authors. All rights reserved.

关键词： Wastewater treatment

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Ballistic Behavior of Three-Dimensional Orthotropic Woven Fabric Based on Virtual Fiber Model

SSRN

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SSRN 2024年

作者： Zhang, Jian Zhou, Yi Lu, Zhenqian Yue, Jianing Han, Jing Zhou, Kanghui Liu, Shengkai Jiang, Qian Wu, Liwei Tianjin and Ministry of Education Key Laboratory for Advanced Textile Composite Materials Tiangong University Tianjin300387 China Innovation Platform of Intelligent and Energy-Saving Textiles School of Textile Science and Engineering Tiangong University Tianjin300387 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan China College of Textiles and Clothing Yancheng Institute of Technology Jiangsu 224051 China

This study proposes a novel virtual fiber model (VFM)1 on a fiber scale to capture the ballistic behavior of fabrics. The model effectively accounts for yarn deformation during 3D orthogonal woven fabric (3DOWF) weaving, yarn pull-out, interfiber friction, and yarn interactions during the ballistic response. The optimized VFM was used to explore the ballistic behaviors of the fabrics. The results revealed that the VFM exhibited a ballistic response consistent with high-speed photography observations and successfully captured fiber slippage and pull-out behavior under impact. Compared to the yarn model (YM), the VFM enables the observation of nonsimultaneous fiber breakage and fiber interactions. Moreover, it illustrates the role of yarn pull-out in the penetration resistance of the 3DOWF, dissipating the kinetic energy of the projectile in the form of friction. Furthermore, the VFM delineated the specific functions of each system yarn. Specifically, the warp and weft yarns primarily serve as impediments to the projectile, whereas the Z yarn binds the weft, promoting the increased involvement of the weft in dissipating kinetic energy. Building on this investigation, the impact of the clamping method on the ballistic performance of the 3DOWF was explored. The findings revealed that yarn pullout emerged as the primary failure mode under the weft sides. Notably, the warp yarns predominantly experienced pullout, which enhanced the friction energy. The Z yarn binds to weft yarns that gather with warp yarns to form a strip-like protrusion, impeding the projectile motion owing to the increased number of yarns. The VFM contributes significantly to the exploration of the impact of fabric structures on ballistic performance, offering valuable insights for designing and enhancing ballistic fabric *** study proposes a novel, fiber-scale virtual fiber model (VFM) to capture the ballistic behavior of fabrics. The model accounts for yarn deformation during 3D orthogonal

关键词： Yarn

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Loofah-Inspired Biomass Polysaccharide-Based Aerogels for All-Weather Super-Viscous Crude Oil Adsorption and Wastewater Treatment in Harsh Environment

SSRN

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SSRN 2023年

作者： Chen, Zhicheng Zheng, Long Song, Yiheng Tan, Yeqiang Xianze, Yin College of Materials Science and Engineering State Key Laboratory of New Textile Materials & Advanced Processing Technology Wuhan Textile University Wuhan430200 China State Key Laboratory of Bio-Fibers and Eco-Textiles Collaborative Innovation Center of Marine Biobased Fiber and Ecological Textile Technology Institute of Marine Biobased Materials College of Materials Science and Engineering Qingdao University Qingdao China

Solar-driven viscosity reduction of highly viscous crude oil has emerged as an environmentally friendly method to address large-scale oil spills. However, the challenge lies in the limited availability of sunlight during cloudy days and at night, which hinders the effectiveness of green advanced porous materials. This study developed all-weather-available advanced porous materials in the form of loofah-like structured aerogels composed of 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane/MXene/carbon nanotubes (CNTs)/sodium alginate (SA)/cellulose fibers (CFs). MXene and CNTs formed a continuous and stable network that enabled PMCSCAs to rapidly reduce crude oil viscosity for all-day based on photothermal and electrothermal conversions. Additionally, loofah-like porous structure and oriented pipeline biomass skeleton endowed PMCSCAs with stable and rapid adsorption capacity and speed. Considering the complexity of the external environment and oily wastewater composition, we verified the separation performance of PMCSCAs for metal ions and dyes and the ice-breaking ability under icy conditions. PMCSCAs provided a novel approach to achieving clean, high-efficiency, all-day remediation of ultra-viscous crude oil. This "Three birds with one stone" approach is expected to be obtained from nature and used on a large scale, replacing conventional porous adsorbent materials. © 2023, The Authors. All rights reserved.

关键词： Crude oil

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Achieving excellent energy storage reliability and endurance via mechanical performance optimization strategy in engineered ceramics with core-shell grain structure

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Journal of Materiomics 2022年第3期8卷 601-610页

作者： Yu Huan Xiaozhi Wang Yingming Zheng Xinjian Wang Tao Wei Jun Ouyang Xiaohui Wang School of Material Science and Engineering University of JinanJinan250022China Institute of Advanced Energy Materials and Chemistry Shandong Provincial Key Laboratory of Molecular EngineeringSchool of Chemistry and Chemical EngineeringQilu University of Technology(Shandong Academy of Sciences)JinanChina State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing100084China

Although dielectric ceramic capacitors possess attractive properties for high-power energy storage,their pronounced electrostriction effect and high brittleness are conducive to easy initiation and propagation of cracks that significantly deteriorate electrical reliability and lifetime of capacitors in practical ***,a new strategy for designing relaxor ferroelectric ceramics with K_(0.5)Na_(0.5)NbO_(3)-core/SiO_(2)-shell structured grains was proposed to simultaneously reduce the electric-field-induced strain and enhance the mechanical strength of the *** simulation and experiment declared that the bending strength and compression strength of the core-shell structured ceramic were shown to increase by more than 50% over those of the uncoated ***,the electric-field-induced strain was reduced by almost half after adding the SiO_(2) *** suppressed electrical deformation and enhanced mechanical strength could alleviate the probability of generation of cracks and prevent their propagation,thus remarkably improving breakdown strength and fatigue endurance of the *** a result,an ultra-high breakdown strength of 425 kV cm^(-1) and excellent recoverable energy storage density(Wrec~4.64 J cm^(-3))were achieved in the core-shell structured *** importantly,the unique structure could enhance the cycling stability of the ceramic(Wrec variation<±2% after 105 cycles).Thus,mechanical performance optimization via grain structure engineering offers a new paradigm for improving electrical breakdown strength and fatigue endurance of dielectric ceramic capacitors.

关键词： Lead-free dielectric ceramic capacitors Local grain structure design Mechanical performance Electrical reliability Fatigue endurance

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Effect of styrene-acrylic emulsion on crack resistance of cement-based materials 2nd

Effect of styrene-acrylic emulsion on crack resistance of ce...

引用

2nd Conference on Research and Application of advanced Cementitious materials and advanced materials Forum, CRAACM and AMF 2020

作者： Mei, Junpeng Li, Hainan Xu, Zhidong School of Urban Construction Wuhan University of Science and Technology Wuhan430081 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China

ISBN: (纸本)9783035718119

In this paper, the brittleness coefficient, elastic modulus-to-strength ratio, drying shrinkage and autogenous shrinkage and cracking sensitivity were used to investigate the effect of styrene-acrylic emulsion (SAE) on crack resistance of cement-based materials under ultralow water binder ratio (0.22). Then the pore structures, hydration products and surface morphology were also studied to explore the mechanism of SAE on improving the crack resistance of cement-based materials. Results show that, the addition of SAE significantly reduces the elastic modulus, brittleness coefficient, elastic strength ratio, drying shrinkage and autogenous shrinkage of the specimen. The cracking susceptibility is also decreased by the incorporation of SAE and when the dosage of SAE was 5%, the initial cracking time would be extended by 43 hours. In addition, incorporation of SAE can reduce the amount of pores that have an adverse effect on shrinkage, refine the microstructure and decrease the calcium hydroxide formation and microcracks of cement-based materials. Such results would be expected to provide guidance on enhancing the anti-cracking ability of high-performance cementitious materials by the dosage of SAE under low water-binder ratio in practical engineering. © 2021 Trans Tech Publications Ltd, Switzerland.

关键词： Lime

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Ionic Conductive Hydrogel with High Tensile Strength, Low Hysteresis, High Adhesivity and Frost Resistance Based on Confinement Effect and Free of Chemical Crosslinker

SSRN

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SSRN 2024年

作者： Hu, Mingqiang Ye, Dezhan Qian, Xing Zhan, Yanhu Jiang, Xiancai School of Chemical Engineering Fuzhou University Fuzhou350108 China State Key Laboratory of New Textile Materials & Advanced Processing Technologies Wuhan Textile University Wuhan430200 China School of Materials Science and Engineering Liaocheng University Liaocheng252000 China

Traditional ionic conductive hydrogel is prepared by chemically crosslinking the polymer chanins to form network. However, the chemically crosslinked ionic conductive hydrogel usually showed limited elongation at break and high hysteresis during stretching process. Here, a simple strategy of synthesizing ionic conductive hydrogel without crosslinking agent was purposed. Hydrophilic salt in the ionic conductive hydrogel not only act as the ion supplier, but also provide the spatial confinement effect to form the completely physically crosslinked hydrogel. Firstly, CaCl2 was used as the representative salt. The optimal PVA/PAM/CaCl2 ionic conductive hydrogel (PPC), showed excellent tensile performance (2400.3±140.63%), anti-freezing performance (-28.8 oC), high conductivity (4.8±0.01 S/m), excellent stability in room temperature, low hysteresis, and high transparency. The conductivity of PPC showed no sensitivity to the tensile strain..This innovative combination enables PPC ionic conductive hydrogel to have extraordinary versatility. The flexible all-solid-state supercapacitor assembled with PPC ionic conductive hydrogel as the electrolyte has a high area specific capacitance (136.9 mF/cm2). The prepared supercapacitor can maintain good stability under certain tensile deformation (The capacitance retention rate was 87.7% when stretched at 200%). Moreover, other high hydrophilic salts including LiCl, ZnCl2, MgCl2 and AlCl3 were used to prepare ionic conductive PVA/PAM hydrogel to verify the universality of this preparation method. © 2024, The Authors. All rights reserved.

关键词： Aluminum chloride

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