摘要
导电高分子水凝胶作为一种新型导电材料,由于其良好的导电性和水凝胶独有的溶胀特点,在生物传感器,电器元件等领域展现了巨大的应用价值。以丙烯酰胺(AAm)作为主体材料,N,N-亚甲基双丙烯酰胺(BisAAm)作为化学交联剂,同时引入甲基丙烯酸月桂酯(LMA)和十二烷基溴化铵(DTBA)组成的胶束交联及丙烯酸钠(SAA)和甲基丙烯酰氯乙基三甲基溴化铵(DMC)形成的阴阳离子静电力交联,再添加适量的石墨粉,通过自由基聚合制备机械性能和导电性能优良的三重交联结构复合导电水凝胶。研究结果表明:水凝胶中BisAAm含量为0.180mol/L,DTBA的含量为0.148mol/L时,能获得最佳机械性能并兼导电性能,其压缩模量为0.340MPa,拉伸模量为0.090MPa,电导率为1.32S/m;该水凝胶具有一定自愈性和pH敏感性,是一款综合性能优良的智能导电复合水凝胶,具有广阔的应用前景。
As a new conductive material, conductive polymer hydrogel shows great application value in biosensors, electrical components and other fields because of its good conductivity and unique swelling characteristics. A compound conductive hydrogel with triple crosslinking structure, good mechanical property and conductivity was prepared via a radical copolymerization method. In the preparation process of conductive hydrogel, based on acrylamide （AAm） was used as the main material, and N, N methylenebisacrylamide （BisAAm） was used as the chemical crosslinking agent. Meanwhile, micelle crosslinking composed of lauryl methacrylate （LMA） and dodecylammonium bromide （DTBA）, and the ionic crosslinking formed between the sodium acrylate （SAA） and methacryloxyethyltrimethyl ammonium chloride （DMC） were introduced, and proper amount of graphite powder was added. The results showed that, the optimal mechanical property and conductivity could be gained under the following conditions： BisAAm content in the hydrogel 0. 180 mol/L and the DTBA content 0. 148 mol/L. The compression modulus was 0. 340 MPa, tensile modulus was 0. 090 MPa, and the conductivity was 1. 32 S/re. The hydrogel also has certain self healing and pH sensitivity. It is an intelligent conductive composite hydrogel with excellent comprehensive performance and broad application prospect.
作者
楼永坚
罗光彦
赵阳
付飞亚
刘向东
LOU Yongjian;LUO Guangyan;ZHAO Yang;FU Feiya;LIU Xiangdong(College of Materials and Textiles,Zhejiang Sci Tech University,Hangzhou 310018,China)
出处
《浙江理工大学学报（自然科学版）》
2018年第6期709-714,共6页
Journal of Zhejiang Sci-Tech University(Natural Sciences)
关键词
三重交联
导电水凝胶
机械性能
triple crosslinking structure
conductive hydrogel
mechanical property
