纳米银线与嵌段聚合物复合导电材料的研究

The preparation of a metal and polymer composite conductive materials

用可逆加成-断裂链转移(RAFT)方法合成两亲性嵌段共聚物聚(甲基丙烯酸甲酯-b-丙烯酸)(PMMA-PAA),多元醇法制得银纳米线,并将两者复合制备出导电复合材料。采用扫描电镜、透射电镜、红外光谱、核磁共振分别对产物进行了表征。通过改变纳米银线的质量比制得具有不同电导性的复合材料,用四探针测试仪测试其电导性,研究了电导率随银纳米线质量比改变的变化规律,结果表明复合材料的电导率随银纳米线含量的增加而变大。

The conductive composites was consist of amphiphilic block copolymer and silver nanowires. The am-phiphilic block copolymer of poly（methyl methacrylate-b-acrylic acid）（PMMA-PAA） was synthesized by reversible addi-tion-fragmentation chain transfer（RAFT） method. The silver nanowires was prepared by the polyol method. Using infrared spectroscopy,scanning electron microscopy and transmission electron microscopy, the composite＇ s structure and perform- ance were analysed. The influences of silver nanowires content on the electrical conductivity of the composites was investi- gated. The different conductivity of the composites was got through changed the ratio of silver nanowires was measured by four-probe method. The resultsy showed that the electrical conductivity of the composites was increased considerably with increasing silver nanowires content.