聚酰亚胺/纳米二氧化钛复合薄膜制备及表征

摘要

采用超声分散-原位聚合的方法,制备了不同纳米二氧化钛(TiO2)含量的聚酰亚胺(PI)/纳米TiO2复合薄膜,通过X射线衍射、紫外可见光谱分析、扫描电子显微镜、红外光谱对薄膜的形态结构及纳米颗粒在复合物中的分散性进行了表征分析.结果表明,纳米TiO2以球状微粒均匀分散在PI基体中,表观粒径约为300 nm(杂化包覆后的粒径),晶形仍为锐钛矿型；纳米TiO2粒子的引入,提高了PI薄膜对可见光的吸收.%A series of polyimide(PI)ano-TiO2 nanohybrid films with different contents of TiO2 were synthesized by ultrasonic dispersion-in-situ polymerization. The resulted nanocom-posite films were characterized by means of XRD, UV-vis, SEM and FTIR. The results indicate that nano-TiO2 particles disperse homogeneously in PI matrix with particle size enwraped in 300 nm, and the anatase phase remains unchanged. The absorption of visible light of PI film can be enhanced by adding nano-TiO2 inorganic particles in PI matrix.