【摘要】 分别以氧化石墨粉(GO)、还原氧化石墨烯乙醇悬浮液(RGO)和热法还原石墨烯粉(TRG)为填料,分散于酚醛树脂(PR)的乙醇溶液中,再将这些基体混合物涂覆于炭纤维(CF)布上,经热压成型工艺制备氧化石墨烯/酚醛树脂/炭纤维、还原氧化石墨烯乙醇悬浮液/酚醛树脂/炭纤维、热法还原氧化石墨烯/酚醛树脂/炭纤维层次复合材料。研究了GO、RGO和TRG对复合材料结构、压缩性能、弯曲性能及磨擦性能的影响。结果表明,与纯酚醛树脂/炭纤维复合材料相比,当纳米填料的质量分数仅为0.1%时,层次复合材料的压缩性能可显著提高,其中,热法还原氧化石墨烯/酚醛树脂/炭纤维的压缩强度和模量分别提高了178.9%,129.5%;弯曲性能也可得到一定的改善。还原氧化石墨烯乙醇悬浮液/酚醛树脂/炭纤维层次复合材料的最大储能模量可提高75.2%。所有改性石墨烯/酚醛树脂/炭纤维层次复合材料的Tg均有所降低。更多还原

【Abstract】 Graphene oxide-carbon fiber/phenolic resin,chemically-reduced graphene oxide-carbon fiber/phenolic resin,and thermally-reduced graphene oxide-carbon fiber/phenolic resin composites were prepared by blending a graphene oxide suspension in an ethanol solution of phenolic resin with carbon fibers,followed by vacuum drying and hot pressing.The effects of the type of graphene oxide on structure,compressive performance and friction properties of the composites were investigated.Results showed that the compressive properties of the composites were greatly improved with a 0.1 mass graphene oxide % loading compared with the pure carbon fiber/phenolic resin composite.The compressive strength and modulus of the thermally-reduced graphene oxide/phenolic resin/carbon fiber composites were increased by 178.9%,129.5%,respectively,and the highest energy storage modulus of the chemically-reduced graphene oxide/phenolic resin/carbon fiber composite was increased by 75.2% compared with the pure carbon fiber/phenolic resin composite.The glass transition temperatures of all the composites containing graphene oxide decreased.更多还原