Shanghai Institute of Applied Physics, Chinese Academy of Sciences, No. 2019, Jialuo Road, Jiading District, Shanghai, 201800, PR China.
Nanoscale. 2012 Mar 7;4(5):1742-8. doi: 10.1039/c2nr11724j. Epub 2012 Feb 6.
Herein, we report a facile approach to decorate graphene oxide (GO) sheets with poly(vinyl acetate) (PVAc) by γ-ray irradiation-induced graft polymerization. The content of PVAc in the obtained sample, i.e., PVAc grafted GO (GO-g-PVAc) is calculated by the loss weight in thermogravimetric analysis (TGA) curves. A GO-g-PVAc sample with a degree of grafting (DG) of 28.5% was well dispersed in common organic solvents and the dispersions obtained were extremely stable at room temperature without any aggregation, even after standing for 2 months. The excellent dispersibility and stability of GO-g-PVAc in common organic solvents are readily rationalized in terms of the full coverage of PVAc chains and solvated layer formation on graphene oxide sheets surface, which weakens the interlaminar attraction of GO sheets. This approach presents a facile route for the preparation of dispersible GO and shows great potential in the preparation of graphene-based composites by solution-processes.
在此，我们报告了一种通过γ射线辐照诱导接枝聚合在氧化石墨烯（GO）片上修饰聚醋酸乙烯酯（PVAc）的简便方法。通过热重分析（TGA）曲线中的失重计算得到的所得样品中 PVAc 的含量，即接枝的 PVAc（GO-g-PVAc）。GO-g-PVAc 的接枝度（DG）为 28.5%，在常见有机溶剂中具有良好的分散性，所得分散体在室温下极其稳定，即使放置 2 个月也没有任何聚集。GO-g-PVAc 在常见有机溶剂中的出色分散性和稳定性可以根据 PVAc 链的完全覆盖以及在氧化石墨烯片表面形成溶剂化层来合理地解释，这削弱了 GO 片层之间的层间吸引力。这种方法为制备可分散的 GO 提供了一种简便的途径，并在通过溶液法制备基于石墨烯的复合材料方面显示出巨大的潜力。
