杂化交联网络水凝胶的制备及表皮传感性能  

Preparation and Epidermal Sensing Properties of Hybrid Cross-Linked Network Hydrogel

作　　者：王鸣 蔡桂娣 夏珊 任秀艳[1] WANG Ming;CAI Guidi;XIA Shan;REN Xiuyan(Polymeric and Soft Materials Laboratory,School of Chemical Engineering,Changchun University of Technology,Changchun 130012,China;Shandong Hongxu Chemical Co.LTD,Dongying 257200,Shandong,China)

机构地区：[1]长春工业大学化学工程学院,高分子软材料实验室,长春130012 [2]山东宏旭化学股份有限公司,山东东营257200

出　　处：《功能高分子学报》2022年第5期476-483,共8页Journal of Functional Polymers

基　　金：吉林省教育厅科学技术研究项目(JJKH20210734 KJ)。

摘　　要：以丙烯酰胺(AAm)单体和甲基丙烯酰氧乙基三甲基氯化铵(DMC)阳离子单体为共聚单体,添加一定量阴离子聚电解质聚丙烯酸钠(PAAS),制备具有杂化交联网络的离子导电水凝胶P(AAm-DMC)-PAAS。采用万能试验机和电化学工作站对其力学性能和应变敏感性能进行测试。结果表明,水凝胶最大应力可达(88.4±4.7) kPa,最大应变为(1 030.8±71.7)%。由于PAAS和DMC能电离出丰富的游离离子,水凝胶无需额外添加导电填料即可保持较高的离子电导率(0.684 S/m)和应变变化的快速响应,灵敏因子约为2.409(0~70%应变范围内)。制备的水凝胶可作为可穿戴应变传感器监测人体运动,还可以组装成表皮电极对人体电生理信号进行准确检测。Ionic conductive hydrogels exhibit good electrical conductivity, excellent tensile properties and high biocompatibility, which is of great significance in the fields of flexible electronic equipment, human-machine interface and health monitoring. By using acrylamide(AAm) monomer and methyl acryloxyethyl trimethylammonium chloride(DMC)cationic monomer as copolymers and adding a certain amount of anionic polyelectrolyte sodium polyacrylate(PAAS), ionic conductive hydrogels with hybrid crosslinking network(P(AAm-DMC)-PAAS) are prepared. The mechanical properties of hydrogel can be effectively regulated by changing the density of chemical crosslinking and ionic crosslinking in hydrogel networks. The experimental results show that the maximum stress of the hydrogel can reach(88.4±4.7) kPa and the maximum strain is(1 030.8±71.7)%. Because PAAS and DMC can ionize abundant free ions, P(AAm-DMC)-PAAS hydrogel can maintain high ionic conductivity and rapid response to strain without additional conductive filler, with conductivity up to 0.684 S/m and sensitivity factor GF about 2.409(0—70% strain range). The hydrogel can be used as a wearable strain sensor to monitor arm bending, finger bending, knee bending and other human movements through changes in relative resistance.The hydrogel can also be assembled into epidermal electrodes, which can accurately detect human physiological signals.Therefore, the P(AAm-DMC)-PAAS has the potential as a multifunctional sensor, which is expected to broaden its application in flexible electronic equipment, intelligent medical and other fields.

关 键 词：导电水凝胶 杂化交联 应变传感器 表皮电极 电生理信号 

分 类 号：O632[理学—高分子化学]