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Electrical property improvement of phenolic formaldehyde resin with graphene and ionic liquid
Hong Wang,Shan-Shan Yao,Zhifu Guan,Fan-Long Jin,박수진 한국화학공학회 2021 Korean Journal of Chemical Engineering Vol.38 No.11
The ionic liquid 3-decyl-bis(1-vinyl-1H-imidazole-3-ium-bromide) (C10[VImBr]2) was synthesized and its chemical structure characterized by Fourier-transform infrared spectroscopy and 1H nuclear magnetic resonance spectroscopy. To improve the electrical conductivity of the phenolic formaldehyde (PF) resin, PF/graphene and PF/graphene/ C10[VImBr]2 composites were prepared via a melt blending and compression-curing process. The impact strength of the composites was shown to increase with the addition of increasing proportion of graphene, and with increasing proportion of C10[VImBr]2, of up to 5 wt%. In detail, the electrical conductivity of the PF/graphene composites increased significantly from 2.3×1012 to 4×104 S/cm as the graphene content increased from 0 to 20 wt%. Moreover, the electrical conductivity of the PF/graphene/C10[VImBr]2 composites containing 15 wt% graphene was shown to increase from 5.6×105 to 9.2×104 S/cm as the content of C10[VImBr]2 increased from 0 to 5 wt%.