Synthesis and characterization of polymer grafted graphene oxide sheets using a Ce(IV)/HNO3 redox system in an aqueous solution |
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| Affiliation: | 1. School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China;2. Key Laboratory of Science and Technology on High-tech Polymer Materials, Chinese Academy of Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China;3. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | We provide here a simple way to synthesize polymer grafted graphene oxide (GO) sheets with intercalated or exfoliated structure by using a redox system with cerium (IV) ammonium nitrate/nitric acid and GO sheets’ hydroxyl groups as the redox couple. Polystyrene, poly (methyl methacrylate) and polyacrylonitrile grafted GO sheets were synthesized in an aqueous solution by this redox-initiated free-radical polymerization strategy, and characterized with Fourier transform infrared spectroscopy, X-ray diffraction, and atomic force microscopy. We investigated the effects of temperature and redox initiator’s concentration on the grafting efficiency. It was found that when a small amount of polymer was grafted onto GO sheets, an intercalated layer structure was formed; while an exfoliated structure was formed with a large amount of polymer grafted. |
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