Preparation and Properties of Carboxymethyl Guar/Polyvinyl Alcohol/Polyacrylamide Shape Memory Conducting Hydrogel
TANG Yan1, YAN Jiao1, WANG Li1,2, AN Peng1,2, YAN Guilong1,2, LAI Jingjuan1,2, LI Zhenyu1,2, ZHOU Lihua1,2, WU Yuanpeng1,2,*
1 The Center of Functional Materials for Working Fluids of Oil and Gas Field, School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China 2 Sichuan Engineering Technology Research Center of Basalt Fiber, State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
Abstract: Carboxymethyl guar gum (CMGG)/polyvinyl alcohol (PVA)/polyacrylamide (PAM) composite conductive hydrogel was prepared by blen-ding and freeze-thawing method. The mechanical properties, shape memory function and conductivity of composite conductive hydrogels were characterized and studied by means of universal tensile testing machine, electrochemical workstation and other instruments. The tensile strength of the composite conductive hydrogel prepared by the hydrogen bond between CMGG/PVA/PAM can reach 0.38 MPa. The addition of NaCl endows the hydrogels with excellent electrical conductivity, and the addition of CMGG also enables the hydrogels to have shape memory and ion imprinting functions, and improves the conductivity of the hydrogels (6.19 ms·cm-1). At the same time, a simple strain sensor was prepared by using the hydrogel, which can be effectively used to detect the tiny movement of human body. The sensor also has good compressive strain sensitivity, which can realize the information encryption and decryption function on the hydrogel.
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2025, Vol. 39 
