溶剂对PI/SiO_2纳米杂化薄膜性能的影响

Effect of Solvent on the Properties of PI/SiO_2 Nano-hybrid Film

以均苯四甲酸二酐(PMDA),4,4′-二氨基二苯醚(ODA)为单体,分别采用N,N-二甲基乙酰胺(DMAc)、DMAc/二甲苯为溶剂,制备了两种PI/SiO2纳米杂化薄膜,并对其微观结构、热稳定性、光学透明性、力学性能进行研究。结果表明:与采用DMAc为溶剂相比,当采用DMAc/二甲苯为溶剂时,SiO2粒子的粒径较小;PI/SiO2纳米杂化薄膜的热稳定性、透光性、强度及韧性均得到提高。

Using pyromellitic dianhydride（PMDA） and 4,4′-diaminodiphenyl ether（ODA） as monomer, N,N-dimethylacetamide（DMAc） and DMAc/dimethyl benzene as solvent respectively, two kinds of polyimide/silica（PI/SiO2） nano-hybrid films were prepared, and their micro structure, thermal stability, transparencyand mechanical properties were studied. The results indicate that compared with DMAc as solvent, whenusing DMAc/dimethyl benzene as solvent, the size of silica particle is smaller, and the thermal stability,transparency, tensile strength and toughness of the PI/SiO2 hybrid film is improved.