【摘 要】
：
A facile and efficient strategy is developed to functionalize and reduce graphene oxide (GO) simultaneously, conquering less environmentally friendly reduction and complicated surface modification.The
【机 构】
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College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100
【出 处】
：
2013 International Symposium on Integrated Molecular / Mater
论文部分内容阅读
A facile and efficient strategy is developed to functionalize and reduce graphene oxide (GO) simultaneously, conquering less environmentally friendly reduction and complicated surface modification.The proposed method is realized by simply refluxing GO with commercialized polyetheramine.The functionalization of GO with D2000 substantially enlarged the interlayer spacing of GO sheets, which effectively prevented their aggregation after reduction, in line with our previous work [1,2].As a consequence, D2000 functionalized GO (GO-D2000) became hydrophobic, evidenced by the selective dispersion of GO-D2000 in dichloromethane rather than in water and obtained an improved electrical conductivity of 11S/m, which was almost 8 orders of magnitude higher than that of GO.Additionally, owning to the improved dispersion of GO-D2000 in epoxy, the composites revealed a sharp transition from electrically insulating to conducting with a low percolation threshold of 0.71 vol%.Glass transition temperature of the epoxy/3.6 wt% GO-D2000 composites was dramatically 27 ℃ higher than that of pristine epoxy.
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