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A multiple flame-retardant,early fire-warning,and highly sensitive thread-shaped all-fabric-based piezoresistive sensor

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Science China(Technological Sciences) 2024年第4期67卷 1151-1159页

作者： LI WeiBiao ZHANG Shuai MA ShuQi WANG JiaCheng WANG Huan YANG QiRong SONG YongTao ZHU Jie North China Institute of Aerospace Engineering Langfang 065000China Langfang Fire and Rescue Division of Hebei Province Langfang 065000China School of Information Science and Engineering Xinjiang College of Science and TechnologyKorla 841000China

In the artificial intelligence age,multifunctional and intelligent fireproof fabric-based electronics are urgently ***,a novel thread-shaped all-fabric-based piezoresistive sensor(denoted as TAFPS)with properties such as flame retardancy,firewarning,and piezoresistivity is proposed,which is composed of an inner nickel-plated fabric electrode,a multifunctional double helix fabric,and an external flame-retardant encapsulation *** to the multiple flame-retardant properties of glass fiber tubular fabric,aminated carbon nanotubes(ACNTs),and ammonium polyphosphate,the char residue of the TAFPS reaches40.3 wt%at 800℃.In addition,the heat-sensitive effect of ACNTs during combustion causes a rapid decrease in the TAFPS resistance,triggering the fire alarm system within 2 ***,benefiting from the force-sensitive behavior of the double helix layer and tightly wrapped pattern of the external heat-shrinkable tubular fabric,TAFPS demonstrated a high sensitivity of4.40 kPa^(-1)(0–5.81 k Pa)and good stability for 10000 *** its excellent flame resistance,high sensitivity,and agreeable stability,the developed TAFPS can be integrated into fire suits to monitor the exercise training process and the external fire *** work offers a novel approach for fabricating all-fabric-based piezoresistive sensors in the future for fire prevention and fire alarms,with promising applications in fire protection,the Internet of Things,and smart apparel.

关键词： all-fabric piezoresistive sensor multiple flame retardancy agile fire-warning high sensitivity

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Low‑Cost,Scalable fabrication of all‑fabric Piezoresistive Sensors via Binder‑Free,In‑Situ Welding of Carbon Nanotubes on Bicomponent Nonwovens

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Advanced Fiber Materials 2024年第1期6卷 120-132页

作者： Guangliang Tian Yihan Shi Jixia Deng Wenhua Yu Leihang Yang Yi Lu Yi Zhao Xiangyu Jin Qinfei Ke Chen Huang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of TextilesDonghua UniversityShanghai 201620China Shanghai Frontiers Science Center of Modern Textiles Donghua UniversityShanghai 201620China Department of Respiratory Medicine Shanghai Jiao Tong University Affiliated Sixth People’s HospitalShanghai 200233China Henan Key Laboratory of Medical and Protective Products Henan Yadu Industry Co.Ltd.Xinxiang 453000China

Wearable piezoresistive sensors have shown enormous application prospects in flexible electronics and human-machine ***,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 ***,a three-dimensional all-fabric piezoresistive sensor is reported based on coating multi-wall carbon nanotubes(MWCNTs)on bicomponent nonwovens composed of core-sheath *** combination of core-sheath fibers with a heat-induced welding strategy greatly improves the adhesion fastness and stability of MWCNT *** 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 *** of the sensor is demonstrated through the detection of human activities(such as pulse,cough and joint movements)and the wireless monitoring of forefinger ***,our sensor is fabricated out of cost-effective materials,using scalable approach without using glue or *** 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

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