Preparation and properties of polyimide/graphene oxide nanocomposite films with Mg ion crosslinker |
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| Authors: | Jin-Yeon Kong Myeon-Cheon Choi Gwang Yeon Kim Jin Joo Park M Selvaraj Mijeong Han Chang-Sik Ha |
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| Institution: | 1. Department of Polymer Science and Engineering, Pusan National University, Busan 609-735, Republic of Korea;2. School of Chemical and Biomolecular Engineering, Pusan National University, Busan 609-735, Republic of Korea;3. Advanced Materials Division, Korea Research Institute of Chemical Technology, 100 Jang-dong, Yuseong-gu, Daejeon 305-600, Republic of Korea |
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| Abstract: | Polyimide(PI)/graphene oxide(GO) nanocomposite films were prepared by chemical cross-linking using small amounts of divalent Mg ions. The PI/GO nanocomposites showed enhanced tensile properties compared to pristine PI due to the presence of exfoliated GO in the PI matrix as well as crosslinking between poly(amic acid) (PAA), which is a precursor of PI, and GO by Mg ions. The hydrogen bonds between PAA and GO suppressed the phase separation between PI and GO, and small amounts of Mg ions can bond between the oxygen functional groups and carboxylate groups of GO and PAA. |
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