Preparation and Properties of Imidazole-containing Polyimide/Silica Hybrid Films

doi:10.1007/s40242-014-4242-4

Chemical Research in Chinese Universities ›› 2014, Vol. 30 ›› Issue (6): 1047-1050.doi: 10.1007/s40242-014-4242-4

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Preparation and Properties of Imidazole-containing Polyimide/Silica Hybrid Films

MA Xiaoye¹, MA Xiaofei², QIU Xuepeng¹, LIU Fangfang¹, JIN Rizhe¹, KANG Chuanqing¹, GUO Haiquan¹, GAO Lianxun¹

1. Polymer Composite Engineering Laboratory, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China;
2. CAST- Xi'an Institute of Space Radio Technology, China Academy of Space Technology, Xi'an 710000, P. R. China

Received:2014-06-27 Revised:2014-08-29 Online:2014-12-01 Published:2014-09-09
Contact: MA Xiaoye E-mail:xyma@ciac.ac.cn
Supported by:
Supported by the National Natural Science Foundation of China(No.21104085), the National High Technology Research and Development Program of China(No.2012AA03A211) and the Major State Basic Research Development Program of China (No.2014CB643603).

Abstract

Abstract:

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.

Key words: Polyimide, Silica, Benzimidazole, Sol-gel method

MA Xiaoye, MA Xiaofei, QIU Xuepeng, LIU Fangfang, JIN Rizhe, KANG Chuanqing, GUO Haiquan, GAO Lianxun. Preparation and Properties of Imidazole-containing Polyimide/Silica Hybrid Films[J]. Chemical Research in Chinese Universities, 2014, 30(6): 1047-1050.

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