Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (3): 929.doi: 10.7503/cjcu20200480

• Polymer Chemistry • Previous Articles     Next Articles

Preparation and Properties of Poly(vinyl alcohol)/polypyrrole Composite Conductive Hydrogel Strain Sensor

WANG Jie1, LI Ying2, SHAO Liang1(), BAI Yang1, MA Zhonglei1(), MA Jianzhong3   

  1. 1.China Key Laboratory of Chemical Additives for Industry,Shaanxi Key Laboratory of Chemical Additives for Industry,College of Chemistry and Chemical Engineering,Shaanxi University of Science and Technology,Xi’an 710021,China
    2.Mianyang BOE Optoelectronics Co. Ltd. ,Mianyang 621000,China
    3.College of Bioresources Chemical and Materials Engineering,Shaanxi University of Science and Technology,Xi’an 710021,China
  • Received:2020-07-21 Online:2021-03-10 Published:2021-03-08
  • Contact: SHAO Liang,MA Zhonglei E-mail:shaoliang@sust.edu.cn;mazl@sust.edu.cn

Abstract:

PVA/PA/NP hydrogel was prepared via freeze-thaw cycle method using poly(vinyl alcohol)(PVA) as raw material, phytic acid(PA) and amino-polyhedral oligomeric silsesquioxane(NH2-POSS, NP) as cross-linking agents. Then, PVA/PA/NP-PPy composite conductive hydrogel was prepared by in?situ polymerization of pyrrole, which overcomed the fragile and hydrophobic characteristics of polypyrrole materials, and further improved the conductivity and sensitivity of hydrogels. The cyclic tensile curve prove that the hydrogel has good self-recovery ability, the conductivity is as high as 7.53 S/m. It can be seen from the I-V curves that the highest detection current of the hydrogel as a flexible strain sensor can reach 9.029 mA and the gauge factor can reach 6.796. The results show that it can accurately monitor many kinds of tiny movements of human body through the change of current signal.

Key words: Poly(vinyl alcohol), Polypyrrole, Conductive hydrogel, Strain sensor

CLC Number: 

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