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采用酚醛树脂为原料,分别以炭黑和碳纳米管作为改性添加剂制备酚醛树脂热解炭。利用差热分析(DSC)、X射线衍射分析(XRD)和压汞法孔径分析对酚醛树脂热解炭进行表征,探讨添加剂和热处理温度对树脂热解炭的结构和抗氧化性的影响。结果表明,碳纳米管和炭黑均可提高热解炭的石墨化度和抗氧化性;碳纳米管改性树脂热解炭的石墨化度高于炭黑改性树脂热解炭,但由于前者热解炭的显微结构中较高的气孔率,所以使其抗氧化性劣于后者。升高热处理温度同样可改善热解炭的抗氧化性和提高石墨化度。
Using phenolic resin as raw material, carbon black and carbon nanotubes were used as modified additives to prepare phenolic resin pyrolytic carbon. The pyrolysis charcoal of phenolic resin was characterized by differential scanning calorimetry (DSC), X-ray diffraction (XRD) and mercury intrusion porosimetry. The effects of additives and heat treatment temperature on the structure and oxidation resistance of pyrolytic carbon were investigated. The results show that both carbon nanotubes and carbon black can improve the degree of graphitization and oxidation resistance of pyrolytic carbon. The degree of graphitization of carbon nanotubes modified pyrolytic carbon is higher than that of carbon black modified resin, but due to The former pyrolytic carbon microstructure higher porosity, so its oxidation resistance is inferior to the latter. Increasing the heat treatment temperature also improves the oxidation resistance of the pyrolytic carbon and increases the degree of graphitization.