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林产化学与工业

林产化学与工业 ›› 2003, Vol. 23 ›› Issue (04): 31-36.

• 研究报告 • 上一篇    下一篇

改性木材硫酸盐木质素制备染料分散剂的研究

杨益琴, 李忠正   

  1. 南京林业大学 化学工程学院, 江苏 南京 210037
  • 收稿日期:2003-05-12 修回日期:1900-01-01 出版日期:2003-12-30 发布日期:2003-12-30

STUDY ON PREPARATION OF DYE DISPERSANT BY MODIFIED CRAFT LIGNIN

YANG Yi-qin, LI Zhong-zheng   

  1. College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
  • Received:2003-05-12 Revised:1900-01-01 Online:2003-12-30 Published:2003-12-30

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摘要： 以松木硫酸盐木质素为原料合成染料分散剂。硫酸盐木质素经亚硫酸盐磺化或亚硫酸盐 甲醛磺甲基化后,再用环氧氯丙烷将部分酚羟基封闭,同时使木质素分子间交联,得到改性木质素染料分散剂。研究了磺化时间、磺化剂用量等因素对木质素磺化度、木质素染料分散剂热稳定性及分散性的影响。确定了适宜的反应条件,以每克木质素为基准,磺化反应:Na2SO3用量1.3mmol,反应时间3h,反应温度160℃;磺甲基化反应:Na2SO3用量1.3mmol,甲醛/亚硫酸钠摩尔比为0.8:1,反应时间3h,反应温度140℃。

关键词: 硫酸盐木质素, 磺化, 磺甲基化, 染料分散剂

Abstract: Dye dispersant was synthesized using kraft lignin as raw material.Kraft lignin was sulfonated or sulfomethylated with sodium sulfite or sodium sulfite-formaldehyde mixture, then reacted with epichlorohydrin to block a portion of the free-phenolic hydroxyl group and at the same time to cross-link lignin molecules to increase the molecular weight, the end product as dye dispersant was obtained at last.Effects of reaction time, reaction temperature and sodium sulfite amount on the lignin sulfonation, heat stability and dispersibility of dispersing dyestuff were examined.The (suitable) sulfonating conditions were:Na2SO3 1.3 mmol(based on per gram of lignin, same as in the following), (reaction) time 3 h, temperature 160℃;and sulfomethylation conditions were:Na2SO3 1.3 mmol, formaldehyde/sodium sulfite molar ratio 0.8:1, sulfomethylation time 3 h, sulfomethylation temperature 140℃.

Key words: kraft lignin, sulfonation, sulfomethylation, dye dispersant

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