Multifunctional Polyimide/Graphene Oxide Composites Via In Situ Polymerization
- Multifunctional Polyimide/Graphene Oxide Composites Via In Situ Polymerization
- 주가등; 임준; 이철호; 조한익; 김환철; 박병남; 유남호; 이성호
- composites; films; electrical conductivity; graphene oxide; gas barrier
- Issue Date
- Journal of applied polymer science
- VOL 131, NO 9, 40177-1-40177-7
- 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.
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