Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (06): 114-119.doi: 10.13475/j.fzxb.20200908406

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• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Preparation and strain sensing of dopamine-modified polypyrrole conductive fabric

WANG Xiaofei, WAN Ailan(), SHEN Xinyan   

  1. Engineering Research Center for Knitting Technology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu 214122, China
  • Received:2020-09-30 Revised:2021-01-20 Online:2021-06-15 Published:2021-06-28
  • Contact: WAN Ailan E-mail:ailan.wan@jiangnan.edu.cn

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Abstract:

In order to improve the binding strength of the polypyrrole(PPy) conductive layer to fabric substrate and the stability of sensors, a polypyrrole/polydopamine (PPy/PDA) conductive polyester/polyurethane fabric was prepared by in-situ polymerization with dopamine as binder, followed by an investigation of the conductive and strain sensing properties of such fabric. The morphology and structure were analyzed by scanning electron microscope and Fourier transform infrared spectroscopy and the sensitivity, repeatability and stability were tested by the self-made KTC Resp Sensor box. The results show that compared with the PPy conductive fabric, the PPy/PDA conductive polyester/polyurethane fabric has a more uniform conductive layer and higher binding strength. The sensing element prepared from this fabric has higher sensitivity and the senser retains good stability after 500 repetitions and can be used for human movement detection and rehabilitation training.

Key words: polypyrrole, polydopamine, conductive fabric, sensitivity, stability, sensing property

CLC Number: 

  • TS195

Tab.1

Sample number"

试样编号 制备试样
0# 仅清洗的涤纶/氨纶原样
1# 聚多巴胺涤纶/氨纶织物
2# 聚吡咯导电涤纶/氨纶织物
3# 聚吡咯/聚多巴胺导电涤纶/氨纶织物

Fig.1

SEM images of samples"

Fig.2

Infrared spectra of samples"

Tab.2

Surface resistance and CV value of samples"

试样编号 表面方阻/(Ω·□-1) CV值
2# 59.7 0.18
3# 75.3 0.06

Fig.3

Resistance change rate of samples after flat grinding"

Fig.4

Weight loss rate of samples after flat grinding"

Fig.5

Test pictures of samples. (a) KTC sensitivity test box; (b) Universal tensile testing machine"

Fig.6

Sensibility of samples"

Fig.7

Stability curves of samples"

Fig.8

Real-time recording of finger movement"

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