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Constructing Anisotropic Conductive Networks inside Hollow Elastic Fiber with High Sensitivity and Wide‑Range Linearity by Cryo‑spun Drying Strategy

引用

Advanced Fiber Materials 2024年第6期6卷 1898-1909页

作者： Along Zheng Kening Wan Yuwen Huang Yanyan Ma Tao Ding Yong Zheng Ziyin Chen Qichun Feng Zhaofang Du Anhui Province Joint Key Laboratory of Cold Insulation Fiber and Clothing Anhui Provincial Engineering Center for Automotive Highly Functional Fiber ProductsSchool of Materials and ChemistryAnhui Agricultural UniversityHefei 230036People’s Republic of China School of Engineering and Materials Science Queen Mary University of LondonMile End RoadLondon E14NSUK Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials College of Materials and Chemical EngineeringChina Three Gorges UniversityYichang 443002People’s Republic of China Institute of Intelligent Machines Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031People’s Republic of China

Stretchable conductive fibers composed of conductive materials and elastic substrates have advantages such as braiding abil-ity,electrical conductivity,and high resilience,making them ideal materials for fibrous wearable strain ***,the weak interface between the conductive materials and elastic substrates restricts fibers flexibility under strain,leading to challenges in achieving both linearity and sensitivity of the as-prepared fibrous strain ***,cryo-spun drying strategy is proposed to fabricate the thermoplastic polyurethane(TPU)fiber with anisotropic conductive networks(ACN@TPU fiber).Benefiting from the excellent mechanical properties of TPU,and the excellent interface among TPU,silver nanoparticles(AgNPs)and polyvinyl alcohol(PVA),the prepared ACN@TPU fiber exhibits an outstanding mechanical *** anisotropic conductive networks enable the ACN@TPU fiber to achieve high sensitivity(gauge factor,GF=4.68)and excellent linearity within a wide working range(100%strain).Furthermore,mathematical model based on AgNPs is established and the resistance calculation equation is derived,with a highly matched fitting and experimental results(R2=0.998).As a conceptual demonstration,the ACN@TPU fiber sensor is worn on a mannequin to accurately and instantly detect ***,the successful construction of ACN@TPU fiber with anisotropic conductive networks through the cryo-spun drying strategy provides a feasible approach for the design and preparation of fibrous strain sensing materials with high linearity and high sensitivity.

关键词： Cryo-spun drying Anisotropic conductive networks High sensitivity Wide-range linearity fibrous wearable strain sensor

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