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采用绿色处理过程从草本植物中提取14 wt%木质素,以该木质素取代25%苯酚制备酚醛树脂,并以木质素酚醛树脂为碳源、聚氨酯泡沫为模板制备泡沫炭,并研究其油水分离性能。结果表明,所得泡沫炭具有开放大孔、低密度、疏水亲油的性能,并对有机溶剂和油品展现出良好的吸附性能,其饱和吸附量可达其自身重量的12~41倍。泡沫炭吸附有机溶剂后可通过直接燃烧进行脱附,循环使用10次后,泡沫炭对植物油仍可保留83%的饱和吸附量。
A green treatment process was used to extract 14 wt% of lignin from the herbaceous plant. Phenol resin was prepared by substituting 25% phenol with the lignin, and foam carbon was prepared by using lignin phenolic resin as a carbon source and polyurethane foam as a template. performance. The results show that the obtained foam carbon has the characteristics of open macropores, low density, hydrophobic and lipophilicity, and exhibits good adsorption performance for organic solvents and oils, and the saturated adsorption capacity reaches 12 to 41 times of its own weight. Foam charcoal adsorption of organic solvents can be desorbed by direct combustion, recycled 10 times, foam carbon can still retain 83% of the saturated adsorption of vegetable oil.