Construction of Flexible Strain/Temperature Sensors with Dual Conductive Networks and Application in Health Monitoring

Jin-hua Meng; Yi-meng Li; Le-qian Wei; Wen-xin Li; Meng-qi Shan; Li-zhen Lan; Fu-jun Wang; Lu Wang; Ji-fu Mao

doi:10.11777/j.issn1000-3304.2024.24047

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Construction of Flexible Strain/Temperature Sensors with Dual Conductive Networks and Application in Health Monitoring

Research Article | 更新时间：2024-11-26

- Construction of Flexible Strain/Temperature Sensors with Dual Conductive Networks and Application in Health Monitoring
- Acta Polymerica Sinica Vol. 55, Issue 9, Pages: 1165-1178(2024)
- 作者机构：
  
  纺织面料技术教育部重点实验室纺织行业生物医用纺织材料与技术重点实验室上海市现代纺织前沿科学研究基地东华大学纺织学院上海 201620
- 作者简介：
  
  Ji-fu Mao, E-mail: jifu.mao@dhu.edu.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2024.24047
  CLC：
- Published：20 September 2024，
  
  Published Online：12 June 2024，
  
  Received：14 February 2024，
  
  Accepted：19 April 2024
- 稿件说明：
移动端阅览
孟金华, 李沂蒙, 魏乐倩, 李雯昕, 单梦琪, 蓝丽珍, 王富军, 王璐, 毛吉富. 双重导电网络柔性应变/温度传感器的制备及健康监测应用. 高分子学报, 2024, 55(9), 1165-1178

Meng, J. H.; Li, Y. M.; Wei, L. Q.; Li, W. X.; Shan, M. Q; Lan, L. Z.; Wang, F. J.;Wang, L.; Mao, J. F. Construction of flexible strain/temperature sensors with dual conductive networks and application in health monitoring. Acta Polymerica Sinica, 2024, 55(9), 1165-1178
孟金华, 李沂蒙, 魏乐倩, 李雯昕, 单梦琪, 蓝丽珍, 王富军, 王璐, 毛吉富. 双重导电网络柔性应变/温度传感器的制备及健康监测应用. 高分子学报, 2024, 55(9), 1165-1178 DOI： 10.11777/j.issn1000-3304.2024.24047.

Meng, J. H.; Li, Y. M.; Wei, L. Q.; Li, W. X.; Shan, M. Q; Lan, L. Z.; Wang, F. J.;Wang, L.; Mao, J. F. Construction of flexible strain/temperature sensors with dual conductive networks and application in health monitoring. Acta Polymerica Sinica, 2024, 55(9), 1165-1178 DOI： 10.11777/j.issn1000-3304.2024.24047.

摘要

为了解决智能可穿戴柔性传感器宽应变传感范围和高灵敏度难以兼顾的问题，采用湿法同轴纺丝方法，一步制备了一种具有双重导电网络结构的带状纤维作为柔性应变/温度传感器. 芯轴的碳纳米管在非溶剂致相分离过程中向鞘轴的聚氨酯扩散，导致碳纳米管嵌入聚氨酯形成导电网络，与芯轴碳纳米管导电层构成双重导电网络，聚氨酯作为鞘轴提供可拉伸性和保护作用. 这种双重导电结构实现了低初始电阻(387 Ω)、宽应变传感范围(Sensing

=425%)

和高灵敏度(

= 0%~200%

GF=208.8;

= 200%~425%

GF=1359.2)，而且它作为柔性传感器还能在0%~20%应变重复1.25×10

次后保持相对电阻基本不变. 此外，该柔性传感器还兼具温度传感功能(TCR=-0.240 %/℃)和耐腐蚀耐水洗性，在智能可穿戴设备等领域具有广泛的前景.

Abstract

In order to solve the problem that it is difficult to balance the wide strain sensing range and high sensitivity of smart wearable flexible sensors

a ribbon fiber with a dual conductive network structure was prepared as a flexible strain/temperature sensor in one step by using a wet coaxial spinning method. The carbon nanotubes in the core axis diffuse into the polyurethane in the sheath axis during the non-solvent phase separation process

leading to the formation of a conductive network of carbon nanotubes embedded in the polyurethane

which constitutes a dual conductive network with the carbon nanotubes conductive layer in the core axis

and the polyurethane as the sheath axis to provide stretchability and protection. This dual conductive structure achieves low initial resistance (387 Ω)

wide strain sensing range (sensing

=425%)

and high sensitivity (

= 0%-200%

GF=208.8;

= 200%-425%

GF=1359.2)

and it can also keep the relative resistance as a flexible sensor basically unchanged after 12

500 repetitions at 0%-20% strain. It can also be used as a flexible sensor to keep the relative resistance almost unchanged after 12500 repetitions at 0% to 20% strain. In addition

the flexible sensor also has temperature sensing function (TCR=-0.240 %/°C) and corrosion and water washing resistance

which has a wide range of prospects in the field of smart wearable devices.

关键词

柔性传感器双重导电网络宽应变传感范围高灵敏度温度传感

Keywords

Flexible sensorDual conductive networkWide strain sensing rangeHigh sensitivityTemperature sensing

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Related Author

Ji-fu Mao

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Fu-jun Wang

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Related Institution

Key Laboratory of Textile Science & Technology, Key Laboratory of Biomedical Textile Materials and Tecnology in Texitile Industry, Shanghai Frontiers Science Center of Advanced Textiles Ministry of Education, College of Textiles, Donghua University

College of Bioresource Chemical and Materials Engineering, Shaanxi University of Science &Technology

School of Materials and Chemical Engineering, Xi'an Technological University

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