Preparation of conductive hydrogel based on graphene oxide/Nano-silver and its performance

doi:10.19398/j.att.202112053

Abstract

Abstract: In order to develop smart sensors based on graphene oxide/nano silver (GO/AgNPs), PVA/SA conductive double crosslinked hydrogels were prepared by using polyvinyl alcohol (PVA)/sodium alginate (SA) double crosslinked hydrogel as substrate and GO/AgNPs composite as conductive filler. A strong hydrogel with high mechanical properties can be formed by mixing PVA and SA in a certain proportion and freezing crosslinking. By adjusting the mass concentration of PVA solution and changing the ratio of PVA to SA, a strong hydrogel with a breaking elongation of 250% can be prepared. When the mass fraction of conductive polymer in the hydrogel is 2.0 mg/mL, it exhibits good electrical conductivity, and its resistance increases significantly with the increase of elongation. The sensitivity of the prepared hydrogel sensor is up to 1.0, which can be used to detect the basic movement of human body.

Key words: GO, nano silver, double network hydrogel, conductivity, sensor

摘要： 为了研发基于氧化石墨烯/纳米银(GO/AgNPs)的智能传感器,以聚乙烯醇(PVA)/海藻酸钠(SA)双交联水凝胶为基材,利用GO/AgNPs复合物作为导电填充材料,制备了PVA/SA导电双交联水凝胶。将PVA与SA按一定比例混合,经过冷冻交联,可以形成具有极高力学性能的强力水凝胶。调节PVA溶液的质量浓度,改变PVA与SA的比例,可以制备出断裂伸长率高达250%的强力水凝胶。当水凝胶中导电聚合物的质量分数为2.0 mg/mL时,其表现出良好导电性,随着伸长率的增加,其电阻也显著增大,制备的导电水凝胶传感器的灵敏度最高可达1.0,可用于检测人体基本运动。

关键词: 氧化石墨烯, 纳米银, 双交联水凝胶, 导电性, 传感器

CLC Number:

TP212

ZHU Bizhi, LIN Hong, CHEN Yuyue, ZHANG Desuo. Preparation of conductive hydrogel based on graphene oxide/Nano-silver and its performance[J]. Advanced Textile Technology, 2022, 30(5): 97-103.

祝毕志, 林红, 陈宇岳, 张德锁. 基于氧化石墨烯/纳米银的导电水凝胶制备及其性能[J]. 现代纺织技术, 2022, 30(5): 97-103.

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