Preparation of graphene sheets/polyimide nanocomposite films by in-situ polymerization

Bo Shen; Yihe Zhang; Li Yu; Fengzhu Lv; Jiwu Shang

doi:10.1117/12.923059

12 April 2012 Preparation of graphene sheets/polyimide nanocomposite films by in-situ polymerization

Bo Shen, Yihe Zhang, Li Yu, Fengzhu Lv, Jiwu Shang

Proceedings Volume 8409, Third International Conference on Smart Materials and Nanotechnology in Engineering; 84092N (2012) https://doi.org/10.1117/12.923059
Event: Third International Conference on Smart Materials and Nanotechnology in Engineering, 2011, Shenzhen, China

Abstract

Graphene sheets were carbon materials with high surface area, and excellent electrical properties. One of the most promising applications of those materials is in polymer nanocomposites. Their multifunctional properties may create new applications of polymer nanocomposites. In this paper, graphene sheets were prepared by oxidation-reduction method. The graphite was oxidized by potassium permanganate and sulphuric acid. The graphene oxide nanosheets, which were exfoliated from graphite oxide by ultrasound in water, were reduced by hydrazine hydrate, and the graphene nanosheets were obtained. Thereafter, the graphene sheets were dispersed in N,N-dimethylacetamide by simple sonication treatment. The graphene sheets/polyimide nanocomposites were synthesized by in situ polymerization using N,N'-dimethylformamide, graphene sheets and pyromellitic dianhydride. It was observed from transmission electron microscopy of graphene oxide sheets and graphene sheets that the very thin sheets were obtained by exfoliation of graphite. The result of FT-IR spectral analysis for graphene sheets shows the functional groups on the graphene sheets surface were almost the same as graphite, and that means the graphene sheets were complete reduced by hydrazine hydrate. A homogeneous dispersion of graphene sheets was achieved in polyimide as evidenced by scanning electron microscopy.

Citation Download Citation

Bo Shen, Yihe Zhang, Li Yu, Fengzhu Lv, and Jiwu Shang "Preparation of graphene sheets/polyimide nanocomposite films by in-situ polymerization", Proc. SPIE 8409, Third International Conference on Smart Materials and Nanotechnology in Engineering, 84092N (12 April 2012); https://doi.org/10.1117/12.923059

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