改性木质素磺酸盐作染料分散剂的研究

摘要

在碱性条件下,木质素磺酸盐经过磺化和磺甲基化缩合制备改性染料分散剂.最佳磺化条件为磺化剂质量分数50％,温度50℃,缩合剂质量分数50％,缩合时间3h,产物分散性达到62.6％；最佳磺甲基化条件为磺化剂质量分数50％,温度70℃,缩合剂质量分数为20％,缩合时间为3h,分散性达到55.5％.通过FT-IR对改性产物结构进行了表征,证明了反应的进行.%Modified dye dispersant was prepared from lignosulfonate through sulfonation and sulfomethylation condensation under alkaline conditions. The optimal conditions for sulfonation condensation: ratio of sulfonating agent 50% , reaction temperature 50℃ , ratio of condensation agent 50%, reaction time 3 h, with a final dispersion force 62.6%. The optimal conditions for sulfomethylation: ratio of sulfonating agent 50%, reaction temperature 70℃, ratio of condensation 20% , reaction time 3 h, with a final dispersion force 55. 5%. Products were characterized by FT-IR.