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

作　　者：Along Zheng Kening Wan Yuwen Huang Yanyan Ma Tao Ding Yong Zheng Ziyin Chen Qichun Feng Zhaofang Du 

机构地区：[1]Anhui Province Joint Key Laboratory of Cold Insulation Fiber and Clothing,Anhui Provincial Engineering Center for Automotive Highly Functional Fiber Products,School of Materials and Chemistry,Anhui Agricultural University,Hefei 230036,People’s Republic of China [2]School of Engineering and Materials Science,Queen Mary University of London,Mile End Road,London E14NS,UK [3]Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials,College of Materials and Chemical Engineering,China Three Gorges University,Yichang 443002,People’s Republic of China [4]Institute of Intelligent Machines,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,People’s Republic of China

出　　处：《Advanced Fiber Materials》2024年第6期1898-1909,共12页先进纤维材料（英文）

基　　金：supported by the Colleges and Universities Science Foundation of Anhui Province(2022AH050908);AAU Introduction of High-level Talent Funds(RC362202);University Synergy Innovation Program of Anhui Province(GXXT-2023-037);Major Science and Technology Program of Anhui Province(S2020b05050002);the Anhui Province Rural Revitalization Collaborative Technology Service Center Construction Project.

摘　　要：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 sensors.However,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 sensor.Herein,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 performance.The 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 movements.Therefore,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 

分 类 号：TQ34[化学工程—化纤工业]