Preparation of Porous Carbon Nanofiber from Liquid Phenolic Resin and Its Characterization
TAO Lei1, ZHENG Yunwu1,2, DI Mingwei1, ZHANG Yanhua1, ZHENG Zhifeng2
1 College of Materials Science and Engineering, Northeast Forestry University, Harbin 150040; 2 Engineering Laboratory for Highly-efficient Utilization of Biomass, Yunnan Province; University Key Laboratory for Biomass Chemical Refinery & Synthesis, Yunnan Province; College of Materials Engineering, Southwest Forestry University, Kunming 650224
Abstract: Porous carbon nanofiber (PCNF) was prepared through electrospinning, curing and carbonization with liquid phenolic resin and polyvinyl alcohol (PVA) as raw materials. The influence of PVA content on the properties of electrospun solution and fiber morphology was discussed. The obtained fibers were characterized by FTIR, TG, SEM, XRD and BET techniques. The results showed that a small amount of PVA could obviously improve the spin-ability of LPF. With the increase of PVA content, the morphology of fiber is more regular and the diameter is smaller. With the carbonization temperature increased, the LPF/PVA fiber pyrolysed gradually, most functional groups were eliminated, and the matrix turned into benzene fused ring structure. At the same time, the value of d(002) decreased, while the values of Lc and Lc/d(002) increased, which implied that arrangement of graphite crystal among of LPF/PVA fiber layers was regularly piled up, and both the carbon net structure and the graphitoidal degree of fiber were deve-loped and improved remarkably. When the carbonization temperature was 800 ℃,the carbon content of LPF/PVA fiber was higher than 55%. The specific surface and pore volume of LPF/PVA fiber increased gradually with the PVA content and the main structure was microporous. When the content of PVA was 8%, a PCNF structure with a surface area of 590 m2/g could be obtained.
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2017, Vol. 31 
