Hu Nantao, Wei Liangming, Wang Yanyan, Gao Rungang, Chai Jing, Yang Zhi, Kong Eric Siu-Wai, Zhang Yafei
Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Research Institute of Micro/Nano Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, PR China.
J Nanosci Nanotechnol. 2012 Jan;12(1):173-8. doi: 10.1166/jnn.2012.5144.
Graphene oxide (GO) reinforced polyimide nanocomposites were synthesized by in situ polymerization of monomers in the presence of GO sheets dispersed in N,N-Dimethylacetamide (DMAc). The functional groups (e.g., hydroxyl, epoxide, and carboxyl groups) associated with the GO make GO excellent dispersion in the organic solvent, which benefits the subsequent in situ polymerization. This process enabled uniform dispersion of GO sheets in the polymer matrix. The resultant GO-polyimide nanocomposite films were studied by tensile test, TGA and SEM. The results showed that the GO sheets incorporated in the polymer matrix exhibited a layer-aligned structure without destruction of the thermal stability of the polymer matrix, and a loading of GO (10 wt%) resulted in a significant enhancement in elastic modulus (86.4%).
氧化石墨烯（GO）增强聚酰亚胺纳米复合材料是通过在分散于N，N - 二甲基乙酰胺（DMAc）中的GO片存在下，使单体原位聚合而合成的。与GO相关的官能团（例如羟基、环氧基和羧基）使GO在有机溶剂中具有出色的分散性，这有利于随后的原位聚合。该过程使GO片在聚合物基体中均匀分散。通过拉伸试验、热重分析（TGA）和扫描电子显微镜（SEM）对所得的GO - 聚酰亚胺纳米复合薄膜进行了研究。结果表明，掺入聚合物基体中的GO片呈现层状排列结构，且聚合物基体的热稳定性未被破坏，GO的负载量为10 wt%时，弹性模量显著提高（86.4%）。
