Journal
EUROPEAN POLYMER JOURNAL
Volume 48, Issue 8, Pages 1394-1405Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2012.05.015
Keywords
Polyimide; Graphene oxide; Cross-linking; Magnesium ions; Properties
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Funding
- Pusan National University Research Grant
- National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology, Korea (MEST) [2012-0000108, 2012-0000421, 2012-0000422]
- Ministry of Knowledge Economy, Korea
- Brain Korea 21 Project of the MEST
- Fundamental R&D Program for Core Technology of Materials
- Korea Evaluation Institute of Industrial Technology (KEIT) [K0004109] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Polyimide(PI)/graphene oxide(GO) nanocomposite films were prepared by chemical crosslinking 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 PM 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 PM. (C) 2012 Elsevier Ltd. All rights reserved.
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