【摘要】 本征石墨烯分散在高分子材料中能够能够明显提高分子的导热性能,但因为本征石墨烯表面缺乏活性基团,片与片之间强大的范德华作用力使其在高分子材料中的解聚和均匀分散尤为困难。氧化石墨烯被证明具有两亲性,从片层边缘至片层中间呈现亲水至疏水的分布,使其能发挥类似表面活性剂的功用。研究证明,氧化石墨烯能够显著促进石墨烯在水性橡胶乳液中的分散,使石墨烯能够均匀的分散在制备得到的石墨烯/氧化石墨烯/天然橡胶复合材料中,进而使得天然橡胶的导热性能得到大幅度的提升。更多还原

【Abstract】 Because of the large specific surface area and the lack of active groups, pristine graphene tends to self-associate into micro-scale aggregates, making them particularly difficult to be uniformly dispersed in the polymer matrix. Graphene oxide has been proved to be amphiphilic and acts as a surfactant. In this study, it proved that graphene oxide could promote the dispersion of graphene in water, and thus improving the dispersion of graphene in the rubber matrix. The well dispersion of graphene could significantly promote the thermal conductivity of the natural rubber.更多还原