偶联剂对PI/SiO2 纳米复合材料形态结构及性能的影响——Ι

用溶胶2凝胶法成功地合成了PI/SiO₂ 纳米复合材料, 并用紫外-可见光谱、红外光谱、扫描电子显微镜等手段对硅烷偶联剂对其微观形态结构以及密度、溶解性等性能的影响进行了研究。研究结果表明, 偶联剂的加入对两相间起到很好的增容作用, 使得二氧化硅无机粒子的粒径大大减小, 分散更加均匀, 在宏观上表现为透明性提高, 所得P I/SiO₂ 纳米复合材料的溶解性有明显改善, 而且随偶联剂加入量的增加, 效果更加显著。另外, PI/SiO₂ 纳米复合材料的密度也随偶联剂量的增加而增大。

INFLUENCE OF COUPLING AGENTS ON THE MORPHOLOGY AND PROPERTIES OF PI/SiO2 NANOCOMPOSITE

A new type of soluble PI/SiO2 nanocomposite was successfully prepared by sol gel process with the addition of small amounts of γ glycidyloxypropyltrimethoxysilane. Furthermore, the effects of coupling agent on the morphology and properties of the PI/SiO2 nanocomposite were investigated using UV vis, FT IR and SEM. The density and solubility of the PI/SiO2 nanocomposite were also measured. The results show that the coupling agent has great influence on the morphology of the PI/SiO2 nanocomposite.The size of SiO 2 inorganic particle becomes much smaller with the addition of coupling agent, which makes the PI/SiO2 films become transparent. Fortunately, the solubility of the PI/SiO2 nanocomposite is also improved by the coupling agent. And all these effects become even clearer with the amount of coupling agent. The density of the PI/SiO2 nanocomposite is also increased by coupling agent.