Journal of Shenyang Aerospace University >
Microwave preparation and functionalization of graphene and its effect on properties of epoxy resin
Received date: 2023-09-24
Online published: 2024-02-05
In order to prepare high-quality graphene more efficiently and cost-effectively, expanded graphite was prepared by heating a commercial graphene precursor in a microwave oven, and then functionalized graphene (D2000-g-GnPs) was prepared by grafting polyetheramine (D2000) onto the graphene (GnPs) surface. Epoxy resin (EP)/graphene composite binders were then prepared by ultrasonic dispersion and magnetic stirring. The effects of graphene on the improvement of the mechanical properties of epoxy resin and the surface morphology of the tensile fracture surface before and after modification were investigated. The experiments showed that the tensile strength, Young's modulus, fracture toughness and fracture energy release rate of epoxy resin increased and then decreased with the increase of graphene content, and the mechanical properties of composites reached the maximum value when the mass fraction of modified graphene reached 0.3%. The tensile strength, Young's modulus and fracture toughness reached 76.269 MPa, 1.315 GPa and 1.79 MPa.m0.5 repectively, which were 24.95%, 10.97% and 16.23% higher than those of graphene/epoxy composites before modification. In addition, the addition of D2000-g-GnPs significantly improved the electrical conductivity of the epoxy binder and a low pre-permeation value of 1.0% was achieved.
Xuhao BAO , Yunpeng HE , Shuo WANG , Qingshi MENG . Microwave preparation and functionalization of graphene and its effect on properties of epoxy resin[J]. Journal of Shenyang Aerospace University, 2023 , 40(6) : 8 -14 . DOI: 10.3969/j.issn.2095-1248.2023.06.002
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