Multifunctional Polyimide/Graphene Oxide Composites Via In Situ Polymerization

Title
Multifunctional Polyimide/Graphene Oxide Composites Via In Situ Polymerization
Authors
주가등임준이철호조한익김환철박병남유남호이성호
Keywords
composites; films; electrical conductivity; graphene oxide; gas barrier
Issue Date
2014-05
Publisher
Journal of applied polymer science
Citation
VOL 131, NO 9, 40177-1-40177-7
Abstract
In this article, we detail an effective way to improve electrical, thermal, and gas barrier properties using a simple processing method for polymer composites. Graphene oxide (GO) prepared with graphite using a modified Hummers method was used as a nanofiller for r-GO/PI composites by in situ polymerization. PI composites with different loadings of GO were prepared by the thermal imidization of polyamic acid (PAA)/GO. This method greatly improved the electrical properties of the r-GO/PI composites compared with pure PI due to the electrical percolation networks of reduced graphene oxide within the films. The conductivity of r-GO/PI composites (30:70 w/w) equaled 1.1 × 101 S m−1, roughly 1014 times that of pure PI and the oxygen transmission rate (OTR, 30:70 w/w) was reduced by about 93%. The Young's modulus of the r-GO/PI composite film containing 30 wt % GO increased to 4.2 GPa, which was an approximate improvement of 282% compared with pure PI film. The corresponding strength and the elongation at break decreased to 70.0 MPa and 2.2%, respectively.
URI
http://pubs.kist.re.kr/handle/201004/47060
ISSN
00218995
Appears in Collections:
KIST Publication > Article
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