聚苯胺-二氧化锡纳米复合材料合成及表征  

Synthesis and characterization of PANI-SnO_2 nanocomposites

作　　者：王彦宗 沈明欢[1] 刘振营[1] 郭亚军[1] 

机构地区：[1]哈尔滨工程大学材料科学与化学工程学院,哈尔滨150001

出　　处：《化工新型材料》2007年第1期46-47,69,共3页New Chemical Materials

基　　金：哈尔滨工程大学基础研究基金(HEUF04063);哈尔滨工程大学NSFC培育基金(HEUFP05031)

摘　　要：用溶胶-凝胶法制备了平均粒径为25nm的金红石结构的SnO2微粒,采用原位聚合工艺制备了聚苯胺-二氧化锡(PANI-SnO2)复合材料。利用XRD、FT-IR和TEM对产物进行了表征。结果表明,复合材料两相间存在化学键合作用;无机纳米相影响了聚苯胺结晶,使其由部分结晶态转变为无定形态;复合后部分聚苯胺红外吸收峰发生移动,这是由于聚苯胺内氮原子孤对电子和苯醌结构中的π电子向Sn原子空轨道转移造成的。微观结构表征显示,复合材料呈“蛋糕-巧克力”结构,高分子基体一定程度上减少了纳米微粒的团聚,改善了其分散性。SnO2 nanoparticles with diameter of 25nm were prepared by sol-gel method. PANI-SnO2 composite material was prepared by in-situ polymerization. XRD resultes showed that SnO2 nanoparticles reduced the crystallinity of PANI. FT-IR analysis indicated that chemical bonds existed between two phases. It was confirmed that transfer of lone pair electron on N atom and a electron on benzene ring and quinone ring to Sn＇s 5d empty orbit lead to the shift of absorption peak of PANI; TEM results showed that PANI matrix can reduced the agglomeration of nanoparticles to a certain extent. The dispersion was better comparing to the pure SnO2 nanocrystals.

关 键 词：纳米SNO2 聚苯胺 原位复合 

分 类 号：TB383.1[一般工业技术—材料科学与工程]