材料科学
检出限
导电体
线性范围
摩擦电效应
各向异性
聚二甲基硅氧烷
压力传感器
各向同性
拉伤
压电
纳米发生器
纳米技术
生物医学工程
复合材料
声学
机械工程
医学
物理
数学
统计
量子力学
内科学
工程类
作者
Peng Ding,Zhenya Ge,Kui Yuan,Jiannan Li,Yi Zhao,Wei Zhai,Yanlong Zhao,Chuntai Liu,Changyu Shen,Kun Dai
出处
期刊:Nano Energy
[Elsevier]
日期:2024-03-12
卷期号:124: 109490-109490
被引量:2
标识
DOI:10.1016/j.nanoen.2024.109490
摘要
A small-strain sensitive and highly compressible strain sensor is urgently required to handle external complex pressure environments in wearable applications and artificial intelligence. Therefore, the development of a reasonable sensor structure to achieve low detection limitation and wide linear detection range is significant and challenging. Herein, a muscle-inspired anisotropic conductive polydimethylsiloxane (PDMS)/carbon black (CB)/thermoplastic polyurethane (TPU) foam (PCTF) was prepared by directional freezing and ultrasonic-dipping method. The density and porosity of PCTF are 0.18 g cm-3 and 85.5%, respectively. Benefiting from the unique oriented structure, PCTF possesses good strain sensing performances, including ultra-low detection limit (0.002% strain), wide linear detection range (up to 82% strain and pressure over 500 kPa, logistic function R2=0.997), short response time (70 ms) and excellent sensing stability. In addition, PCTF demonstrates excellent properties as triboelectric nanogenerator (TEN(G) (2.5 × 3 cm2), including high triboelectric output (open-circuit voltage VOC=56 V) and high sensitivity (2.0 mV Pa-1), endowing PCTF with the motion state and running posture detecting ability. Moreover, PCTF-based strain sensors consisting of a plantar array can be employed to detect abnormal gait, including supination and pronation, providing a feasible strategy for training and personalized rehabilitation of the athletes.
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