Electrical property improvement of phenolic formaldehyde resin with graphene and ionic liquid

• Published in: The Korean journal of chemical engineering 2021, 38(11), 260, pp.2332-2340
• Main Authors: Wang, Hong, Yao, Shan-Shan, Guan, Zhifu, Jin, Fan-Long, Park, Soo-Jin
• Format: Article
• Language: English
• Subjects: Biotechnology; Catalysis; Chemical synthesis; Chemistry; Chemistry and Materials Science; Composite materials; Compressive strength; Electrical resistivity; Electronic; Formaldehyde resins; Fourier transforms; Graphene; Imidazole; Impact strength; Industrial Chemistry/Chemical Engineering; Infrared spectroscopy; Inorganic; Ionic liquids; Ions; Materials (Organic; Materials Science; Melt blending; NMR spectroscopy; Spectrum analysis; Thin Films; 화학공학
• ISSN: 0256-1115; 1975-7220
• DOI: 10.1007/s11814-021-0860-y

The ionic liquid 3-decyl-bis(1-vinyl-1 H -imidazole-3-ium-bromide) (C 10 [VImBr] 2 ) was synthesized and its chemical structure characterized by Fourier-transform infrared spectroscopy and 1 H nuclear magnetic resonance spectroscopy. To improve the electrical conductivity of the phenolic formaldehyde (PF) resin, PF/graphene and PF/graphene/C 10 [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 C 10 [VImBr] 2 , of up to 5 wt%. In detail, the electrical conductivity of the PF/graphene composites increased significantly from 2.3×10 −12 to 4×10 −4 S/cm as the graphene content increased from 0 to 20 wt%. Moreover, the electrical conductivity of the PF/graphene/C 10 [VImBr] 2 composites containing 15 wt% graphene was shown to increase from 5.6×10 −5 to 9.2×10 −4 S/cm as the content of C 10 [VImBr] 2 increased from 0 to 5 wt%.