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林产化学与工业 ›› 2009, Vol. 29 ›› Issue (6): 52-56.

• 研究报告 • 上一篇    下一篇

二乙醇胺基木质素非离子表面活性剂的制备及表征

艾青, 方桂珍, 赵银凤, 王春海, 任世学   

  1. 东北林业大学 材料科学与工程学院, 黑龙江 哈尔滨 150040
  • 收稿日期:2009-01-15 修回日期:1900-01-01 出版日期:2009-12-30 发布日期:2009-12-30
  • 通讯作者: 方桂珍,博士生导师,研究领域:木材化学与精细化学品;E-mail:fanggz_0@163.com。

Synthesis and Characterization of Diethanolamine-based Lignin Nonionic Surfactant

AI Qing, FANG Gui-zhen, ZHAO Yin-feng, WANG Chun-hai, REN Shi-xue   

  1. Key Laboratory of Bio-based Material Science and Technology, Northeast Forestry University, Ministry of Education, Harbin 150040, China
  • Received:2009-01-15 Revised:1900-01-01 Online:2009-12-30 Published:2009-12-30

摘要: 依据酸沉淀法对碱木质素进行了分级,分级后pH值4~6的木质素与环氧氯丙烷、二乙醇胺反应,制备了木质素基非离子表面活性剂。通过红外光谱、含氮量的测定对产物的结构进行了表征,通过表面张力测定对产品的表面活性进行了分析。结果表明:木质素基非离子表面活性剂固含量为 32.6%,含氮量为 1.99%,红外光谱分析可确定在木质素上引入了环氧氯丙烷和二乙醇胺,水溶液表面张力降低到 53.27 mN/m,表明二乙醇胺基木质素非离子表面活性剂(DLNS)具有良好的表面活性。另外通过与十二烷基磺酸钠(SDS)复配后浊度的测定,表明产品在SDS与DLNS的体积比为20:3~20:20范围与SDS复配,浊度较低,复配效果较好。

关键词: 木质素, 二乙醇胺, 非离子表面活性剂, 复配

Abstract: Alkaline lignin was classificated according to the method of acid precipitation. The classified lignin at pH value 4-6 was treated with epichlorohydrin and diethanolamine to prepare diethanolamine-based lignin nonionic surfactant. The structure of the product was characterized by FT-IR and determination of nitrogen content. The surface-active property and solubility were investigated by surface tension experiment and turbidity test. The results showed that solid content of the surfactant is 32.6%, nitrogen content is 1.99%, FT-IR spectrum showed the introduction of diethanolamine into lignin. Surface tension of aqueous solution decreased to 53.27 mN/m, indicating the favorable surface activity in aqueous solution. The turbidity determination of blended solution of diethanolamine-based lignin nonionic surfactant(DLNS) with dodecyl sodium sulfate(SDS) showed low turbidity and superior effect in quite a wide range of V(SDS):V(DLNS)20:3-20:20.

Key words: lignin, diethanolamine, nonionic surfactant, blending

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