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Non‐surfactant template‐directed synthesis of SiO 2 ‐polyimide hybrid self‐standing films with ordered mesoporous structure
Author(s) -
Dai Xin,
Geng Lei,
Fu Yuqin,
Liu Dan,
Lü Changli
Publication year - 2011
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1779
Subject(s) - polyimide , materials science , mesoporous material , hydrogen bond , chemical engineering , pulmonary surfactant , hybrid material , fourier transform infrared spectroscopy , tartaric acid , polymer chemistry , condensation polymer , molecule , polymer , nanotechnology , organic chemistry , layer (electronics) , composite material , chemistry , catalysis , citric acid , engineering
The silica‐PI hybrid self‐standing films with ordered mesoporous structure have been prepared by using dibenzoyl‐ L ‐tartaric acid ( L ‐DBTA) as non‐surfactant template under mild sol–gel route. Polyimide matrix was obtained from polyamic acid (PAA) via thermal imidization process and the template was removed in this process. The PI‐based hybrid film with 20 wt% SiO 2 obtained from DBTA presented the ordered mesoporous channels with average pore size of about 2.0 nm and BET surface area of 1167 m 2 /g. FTIR and SEM studies indicated that the hydrogen bond interaction between the carboxylic groups of DBTA and benzamide bonds of PAA made the PAA possibly participate in the assembly process of the aggregates of the non‐surfactant template molecules. The mechanical, thermal and some physical properties of these hybrid films materials were also characterized. Copyright © 2010 John Wiley & Sons, Ltd.