高等学校化学研究 ›› 2014, Vol. 30 ›› Issue (6): 1047-1050.doi: 10.1007/s40242-014-4242-4
MA Xiaoye1, MA Xiaofei2, QIU Xuepeng1, LIU Fangfang1, JIN Rizhe1, KANG Chuanqing1, GUO Haiquan1, GAO Lianxun1
MA Xiaoye1, MA Xiaofei2, QIU Xuepeng1, LIU Fangfang1, JIN Rizhe1, KANG Chuanqing1, GUO Haiquan1, GAO Lianxun1
摘要:
Imidazole-containing polyimide/silica(PI/SiO2) hybrid films were prepared from 3,3',4,4'-biphenyltetra- carboxylic dianhydride(BPDA) and 2,2'-di(p-aminophenyl)-5,5'-bibenzimidazole in N,N-dimethylacetamide(DMAc) by sol-gel method and thermal imidization. The hybrid film with high silica mass fraction up to 40% was transparent. Scanning electron microscope(SEM) and transmission electron microscope(TEM) results of the film indicate a homogeneous dispersion of silica nanoparticles in the polyimide matrix. One hybrid film PI/SiO2 with 15% SiO2 exhibits better mechanical properties with a tensile strength of 222 MPa, an elongation at break of 12%, and a tensile modulus of 5.66 GPa. The reinforced mechanism on mechanical properties was also studied.