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新型可溶性PI/SiO₂纳米复合材料的研究

STUDY ON THE NEW-CLASS SOLUBLE PI/SIO₂ NANOCOMPOSITE

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【Author】 Shang Xiuyong (Engineering Research Center in Organic Synthesis, Chinese Academy of Sciences, Shanghai 200062)Zhu Zikang, Yin Jie (College of Chemistry and Chemical Engineering, Shanghai Jiaotong University 200240)

【机构】中科院有机合成工程研究中心；上海交通大学化学化工学院；上海交通大学化学化工学院上海 200062；上海 200240；上海 200240；

【摘要】通过正硅酸乙酯与聚酰胺酸的N-甲基-2-吡咯烷酮溶液的溶胶-凝胶反应,制备出新型的聚酰亚胺/二氧化硅纳米复合材料。用紫外-可见光、电镜、高阻计等手段对其光学透明性、微观结构、热稳定性、力学性能、绝缘性能,以及其特有的溶解性能进行了研究。结果表明,随SiO₂含量的增加,复合材料中SiO₂粒子尺寸逐渐增大,光学透明性降低,热稳定性增加,溶解性减弱,力学性能先增后降,并在一定的范围内同时具有增强增韧效果。更多还原

【Abstract】 A new class of soluble polyimide/silica nanocomposite was prepared by the sol-gel process starting form tetraethoxysilane (TEOS) in the solution of polyamic acid in N-methyl-2-pyrrolidone. The hybrid films or solutions were obtained by the hydrolysis - polvcon-densation of TEOS in the polyamic acid solution, followed by heating at 270℃. UV - vis, SEM, TGA were used to monitor the microstructure, solubility, thermal properties, mechanical properties, etc. of the PI/SiO2 nanocomposite.更多还原