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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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Effect of Ti-Si-Mg-Al wire on microstructure and mechanical properties of plasma arc in-situ welded joint of SiC_p/Al composites

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Transactions of Nonferrous Metals Society of China 2012年第2期22卷 305-311页

作者：雷玉成薛厚禄胡文祥闫久春江苏大学材料科学与工程学院镇江212013 哈尔滨工业大学先进焊接与连接国家重点实验室哈尔滨150001

The influence of Ti-Si-Mg-AI wire on microstructure and mechanical properties of SiCp/A1 metal matrix composite joints produced by plasma arc in-situ weld-alloying was investigated. Argon-nitrogen mixture was used as plasma gas and Ti-Si-Mg-A1 flux-cored wires as filled composites. Weldments were submitted to tensile test. Meanwhile, the macro morphology and microstructure of the joints were examined. The result shows that the formation ofneedie-like harmful phase A14C3 is effectively inhibited and the wettability of molten pool is improved by adding Ti-Si-Mg-A1 flux-cored wires. With 15Ti-5Si-5Mg-A1 flux-cored wire as filled composite, the maximum tensile strength of the welded joint is 267 MPa, which is up to 83% that of the matrix composites under annealed condition.

关键词： plasma arc in-situ welding aluminium matrix composites Ti-Si-Mg-A1 flux-cored wire

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