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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 particles with the average particle size of 25 nm were prepared by sol-gel method. PANI-SnO2 composite was prepared by in-situ polymerization. The products were characterized by XRD, FT-IR and TEM. The results show that there are chemical bonding between the two phases of the composite; the inorganic nanophase affects the crystallization of polyaniline, which changes from partially crystalline state to amorphous state; the polyaniline infrared absorption peak of the composite part moves after the polyaniline Nitrogen atom lone pair of electrons and benzoquinone structure π electron to Sn atom empty orbit transfer caused. The microstructural characterization showed that the composite was a “cake-chocolate” structure, and the polymer matrix reduced the agglomeration of nano-particles to a certain extent and improved the dispersibility.