硅烷偶联剂在PPy/SiO_2纳米导电复合材料制备中的应用(英文)

Application of silane coupling agent in the preparation of PPy/SiO_2 conducting nanocomposites

描述了一种合成PPy/SiO2纳米复合材料的新方法。首先用不同百分含量的氨丙基三乙氧基硅烷(APS)处理SiO2,然后通过化学氧化聚合法合成PPy/APSSiO2纳米复合材料。文中讨论了偶联剂的使用对复合材料的影响及其作用机理。结果表明,用APS处理过的SiO2合成的复合材料其PPy含量、电导率和稳定性都有很大提高,其中用1%APSSiO2合成的复合材料电导率最高,为38.4S/cm。文中还阐述了偶联剂的预处理对PPy/SiO纳米复合材料形貌的影响。

A new route for the preparation of polypyrrole-silica (PPy/SiO2) nanocomposites was described. Silica particles were first modified by silane coupling agent γ-aminopropyltriethoxysilane (APS), then PPy/APS-SiO2 nanocomposites were prepared by chemical polymerization. The influences of adding coupling agent and its action mechanism were described. The PPy content, conductivity and stability of composites were increased according to the pretreatment of silica. In them, the conductivity of PPy/1% APS-SiO2 is 38.46 S/cm, which is the highest among PPy/APS-SiO2 nanocomposites. The influences of silane coupling agent to the morphology of PPy/SiO2 nanocomposites were also described.