Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (12): 45-49.doi: 10.13475/j.fzxb.20181107406

• Textile Engineering • Previous Articles     Next Articles

Strain sensor based on silver nanowires coated yarn with chain stitch structure

WU Ronghui1,2,3, MA Liyun1,2, ZHANG Yifan1,2,3, LIU Xiangyang2,4, YU Weidong1,2,3()   

  1. 1. College of Textiles, Donghua University, Shanghai 201620, China
    2. Institute for Biomimetics and Soft Matter, Xiamen University, Xiamen, Fujian 361005, China
    3. Key Laboratory of Textile Science & Technology, Ministry of Education, Donghua University, Shanghai 201620, China
    4. Department of Physics, National University of Singapore, Singapore 117542, Singapore
  • Received:2018-11-29 Revised:2019-05-26 Online:2019-12-15 Published:2019-12-18
  • Contact: YU Weidong E-mail:wdyu@dhu.edu.cn

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Abstract:

In order to prepare yarn-based strain sensor, the twisted silk filaments were woven into a closed chain stitch structure. Silver nanowire was prepared by reducing silver nitrate with polyol, base yarns were impregnated in an ethanol dispersion of the silver nanowires for conductivity modification. The strain-resistance sensing performance of the yarn-based strain sensor was studied. The results show that the yarns with the chain stitch structure have excellent strain sensing performance, the yarn resistance decreases with the increase of the strain. When the tensile strain is less than 5%, the gauge factor of the strain sensor is up to 20.14. The sensor has stable response in the tensile frequency range from 0.01 Hz to 1.00 Hz, and also has good cycle stability.

Key words: silk, silver nanowire, chain stitch, strain sensor, intelligent textile

CLC Number: 

  • TS141.8

Fig.1

Processing equipment for reeling, twisting and sizing integrated silk yarn"

Fig.2

Flow chart of preparation of strain sensor with chain stitch structure"

Fig.3

Surface morphology of silver nanowires"

Fig.4

SEM images of yarn-based strain sensor (a) and its enlarge view of connecting point (b)"

Fig.5

Strain-resistance change rate curve of yarn-based sensor"

Fig.6

Chain stitch structure strain sensor (a)and its equivalent resistance model unit (b)"

Fig.7

Response of yarn-based strain sensor on different frequency"

Fig.8

Strain (a) and resistance (b) change of yarn sensor in rapid strain application and release"

Fig.9

Cycling test curves for electronic performance of yarn-based strain sensor when stretching"

Fig.10

Load-elongation curve of yarn-based strain sensor when cycling for 50 times"

Fig.11

Load-elongation curve of intelligent glove imbedded with strain sensitive yarn when cycling for 50 times"

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