笼型倍半硅氧烷/聚酰亚胺复合薄膜的合成及性能  

Studies on Preparation and Properties of POSS/PI Hybrid Films

作　　者：魏少华[1,2] 吴小军[2] 杜凯[1,2] 易勇[1] 尹强[2] 

机构地区：[1]西南科技大学极端条件物质特性联合实验室,四川绵阳621010 [2]中国工程物理研究院激光聚变研究中心,四川绵阳621900

出　　处：《西南科技大学学报》2016年第4期28-32,共5页Journal of Southwest University of Science and Technology

摘　　要：以溶胶凝胶法制备得到一类新型笼型倍半硅氧烷(G-POSS)/聚酰亚胺(PI)复合薄膜。通过红外反射光谱(DRIFT-IR)、扫描电子显微镜(SEM)表征了其结构与薄膜断面形貌,以热重分析(TGA)和机械性能分析研究了薄膜的耐热性、室温(25℃)和低温(77 K)下的力学性能。结果表明,在掺杂质量分数低于5%时,该复合薄膜耐热性保持稳定,同时在室温和低温下都表现出优于纯PI膜的拉伸强度,其中在G-POSS掺杂质量分数为3%时,复合薄膜的拉伸强度为235 MPa(77 K),比纯PI膜提升了9%。掺杂质量分数低于5%的该型复合薄膜具有较好的热性能和机械性能。A series of polyhedral oligomericsilsesquioxane（ POSS） / polyimide（ PI） hybrid films were prepared by the sol- gel technique. Particular structural,morphological,mechanical and thermal properties of the G-POSS / PI nanocomposite films were investigated by DRIFT- IR,SEM,TGA,and universal tester,i. e.,the tensile strength of the hybrid films were higher than pure PI both at cryogenic and room temperature. The highest tensile strength of the G- POSS / PI films was 235 MPa by incorporating 3% G- POSS at 77 K and 9%stronger than pure PI. That’s mainly attributed to the tighter arrangement and more intense interaction between the two components. As a consequence,the hybrid film with lower than 5% POSS content（ e. g.,3%） would be more possibly used as a kind of novel material at cryogenic temperature compared with pure PI film in the cryogenic refrigeration technology and inertial confinement fusion（ ICF） physics experiments.

关 键 词：笼型低聚倍半硅氧烷/聚酰亚胺复合薄膜 热性能 机械性能 溶胶凝胶法 

分 类 号：TQ323.7[化学工程—合成树脂塑料工业]