Study on interfacial adhesion of amino-functionalized graphene-glass fiber reinforced epoxy composites

doi:10.19936/j.cnki.2096-8000.20210928.031

Abstract

Abstract: To enhance the interfacial adhesion of glass fiber reinforced epoxy composites (GFRE), amino-functionalized graphene was first obtained by grafting aliphatic diamines on the surface of graphene oxide (GO) via the covalent bond, and then deposited on the surface of glass fibers to obtain an amino-functionalized graphene-glass fiber preform. Finally, the amino-functionalized graphene-glass fiber reinforced epoxy composite was prepared based on the vacuum assisted resin injection molding process. The results show that the modification of GO by aliphatic diamine with appropriate alkyl chain lengths can contribute to improving the interfacial adhesion of the composites, while the long alkyl chain weakens the interfacial adhesion strength of the composites. Compared with pure GFRE, the mechanical and thermal properties of the composites containing diaminooctane-modified GO were the best. The interlaminar shear strength, tensile strength and modulus of such composite were promoted by about 35%, 37% and 28%, respectively. And its flexural strength and modulus were improved by 32% and 43%, respectively. The glass transition temperature of such composite increased by nearly 9 ℃.

Key words: fiber-reinforced composites, epoxy resin, graphene, surface/interface modification

CLC Number:

TB332

HUANG Dong-hui, ZENG Shao-hua. Study on interfacial adhesion of amino-functionalized graphene-glass fiber reinforced epoxy composites[J]. COMPOSITES SCIENCE AND ENGINEERING, 2022, 0(6): 27-32.

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