标度系数
材料科学
压阻效应
碳纳米管
聚二甲基硅氧烷
复合材料
导电体
复合数
多孔性
电导率
乳状液
纳米技术
化学工程
制作
化学
物理化学
病理
替代医学
工程类
医学
作者
Lanxin Li,Jianan Deng,Peng Kong,Wei Zou,Zhongjie Du,Hong Wang,Chen Zhang
标识
DOI:10.1016/j.compscitech.2024.110459
摘要
With the rapid development of the application in health-monitors and wearable devices, the demand for the piezoresistive sensors with both high flexibility and high sensitivity has been growing. In this work, a porous carbon nanotubes/polydimethylsiloxane (CNTs/PDMS) composite was prepared by high internal phase emulsion (HIPE) template. The PDMS foam with tens of micrometers of pores offered high flexibility and elasticity. Moreover, guided by cetyltrimethylammonium bromide (CTAB) in HIPE, CNTs were selectively distributed in inner pores’ surface of the foam, and then the 3D conductive network was constructed. As a result, the stress of the foam was 107.1 kPa at 60 % compressive strain and the electrical conductivity reached 9.77×10−5 S m−1, when the volume fraction of CNTs was 1 vol%. Finally, the flexible conductive foam was applied for a piezoresistive sensor. The sensor exhibited a high gauge factor (GF = 24.15) and a wide working range (0∼60 %). Furthermore, the human movements, such as finger bending and walking, were detected by as-prepared piezoresistive sensor, and a good response was obtained.
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