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.
出处
《化工新型材料》
CAS
CSCD
北大核心
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)
关键词
纳米SNO2
聚苯胺
原位复合
SnO2 nanoparticle, PANI, in-situ polymerization
