摘要
采用溶胶-凝胶法和二氧化硅粒子掺杂共混法分别制备了聚酰亚胺/SiO2杂化膜和纳米复合膜.采用红外分光光度计(FTIR)、热重分析仪(TGA)和透射电镜(TEM)表征了所制备膜的结构微观形态和热性能并进行分析对比,结果表明在杂化膜中SiO2在聚酰亚胺基体中可以形成分子级分散,复合膜表现出较强的吸湿性使其热分解温度较低.研究认为,采用溶胶-凝胶法制备聚酰亚胺/SiO2介电材料更为合理.
PI/SiO2 hybrid films were prepared with an improved sol - gel process, and PI/SiO2 nanocomposite films were successfully prepared by blending the modified SiO2 particles into PAA solution respectively. Fourier transform infrared spectroscopy （FT- IR）, transmission electron microscope （TEM） and thermal gravimetric analysis （TGA） were used to characterize the structure and properties of the obtained films. The results confirmed the formation of Si--O---Si network and the conversion from PAA into polyimide in both hybrid and nanocomposite films. It was found that SiO2 was dispersed more finely and homogenously in hybrid films. With the increase of SiO2 content, the thermal stability decreased in both films. Although both hybrid and nanocomposite films showed the same behavior, the hyprid films should be more promising for electrical applications due to its good thermal stability, fine dispersibility and low moisture absorption.
出处
《山东师范大学学报（自然科学版）》
CAS
2007年第3期65-68,共4页
Journal of Shandong Normal University(Natural Science)
基金
国家自然科学基金资助项目(50103010)
