STUDY OF MECHANICAL PROPERTIES OF ACIDIFICATION GRAPHENEMODIFIED EPOXY RESIN AND ITS CARBON FIBER COMPOSITE

Abstract

Abstract: In this paper, for the application of graphene on toughening of composite, the acidification of graphene was conducted. Then, acidification graphene/epoxy resin (EP) casting was prepared by ultrasonic dispersion. Subsequently, acidification graphene/ carbon fiber (CF)/epoxy resin (EP) composites were prepared by compression molding. The surface structure and morphology of acidication graphene were characterized by IR and TEM. Mechanical properties of graphene modified EP and CF-EP were evaluated by mechanical test methods such as stretching, bending and impact. And scanning electron microscopy (SEM) was used to observe the morphology of the tensile section of the composites. The results show that the polar groups such as hydroxyl and carboxyl groups were successfully introduced into the surface of the graphene after acidizing treatment. Acidified graphene can effectively strengthen and toughen EP and CF/EP. When the content of acidified graphene was 0.2wt%, EP tensile strength and impact strength increased by 23.2% and 109.8%, respectively. The tensile strength and the flexural strength of CF/EP composites increased were by 6.0% and 10.6%, respectively. When the addition amount was 0.5wt%, the ILSS of CF/EP composites were increased by 7.4%. The microstructure analysis showed that acidified graphene can enhance CF/EP, which is mainly achieved by strengthening and toughening the EP, which simultaneously improve the interfacial properties between CF and EP.

Key words: acidified graphene, modification, EP, CF/EP, mechanical properties

CLC Number:

TB332

YU Qian-qian, CHEN Gang, ZHENG Zhi-cai, CHONG Lin. STUDY OF MECHANICAL PROPERTIES OF ACIDIFICATION GRAPHENEMODIFIED EPOXY RESIN AND ITS CARBON FIBER COMPOSITE[J]. Fiber Reinforced Plastics/Composites, 2018, 0(5): 33-40.

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