Low‑Cost,Scalable Fabrication of All‑Fabric Piezoresistive Sensors via Binder‑Free,In‑Situ Welding of Carbon Nanotubes on Bicomponent Nonwovens  

作　　者：Guangliang Tian Yihan Shi Jixia Deng Wenhua Yu Leihang Yang Yi Lu Yi Zhao Xiangyu Jin Qinfei Ke Chen Huang 

机构地区：[1]State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Textiles,Donghua University,Shanghai 201620,China [2]Shanghai Frontiers Science Center of Modern Textiles,Donghua University,Shanghai 201620,China [3]Department of Respiratory Medicine,Shanghai Jiao Tong University Affiliated Sixth People’s Hospital,Shanghai 200233,China [4]Henan Key Laboratory of Medical and Protective Products,Henan Yadu Industry Co.,Ltd.,Xinxiang 453000,China

出　　处：《Advanced Fiber Materials》2024年第1期120-132,共13页先进纤维材料（英文）

基　　金：supports from the National Natural Science Foundation of China(Grant No.32271378);Henan Key Laboratory of Medical and Protective Products(No.YDFH-2022-KF-02);the Fundamental Research Funds for the Central Universities and Graduate Student Innovation Fund of Donghua University(CUSF-DHD-2020019)are acknowledged.

摘　　要：Wearable piezoresistive sensors have shown enormous application prospects in flexible electronics and human-machine interfaces.However,current piezoresistive sensors suffer from common deficiencies including high fabrication cost,poor comfort and low attachment fastness of conductive substances on substrates,thereby impeding their large-scale production and practical use.Herein,a three-dimensional all-fabric piezoresistive sensor is reported based on coating multi-wall carbon nanotubes(MWCNTs)on bicomponent nonwovens composed of core-sheath fibers.The combination of core-sheath fibers with a heat-induced welding strategy greatly improves the adhesion fastness and stability of MWCNT network.The multi-layered all-fabric structure provides as-prepared sensors with high sensitivity(9.43%kPa^(-1)in 0-10 kPa and 0.076%kPa^(-1)in 20-120 kPa),wide pressure-sensing range(0-120 kPa),fast response/relaxation time(100 and 60 ms),good reproducibility and air permeability.Application of the sensor is demonstrated through the detection of human activities(such as pulse,cough and joint movements)and the wireless monitoring of forefinger bending.Moreover,our sensor is fabricated out of cost-effective materials,using scalable approach without using glue or binders.The method established in this work may provide an efficient strategy for the design and production of high-performance all-fabric piezoresistive sensors.

关 键 词：Piezoresistive pressure sensors Core-sheath fibers All-fabric Multi-wall carbon nanotubes In-situ welding 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]