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。
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.
出处
《林产化学与工业》
EI
CAS
CSCD
北大核心
2009年第6期52-56,共5页
Chemistry and Industry of Forest Products
基金
黑龙江省重点项目(GB06B501-3)
林业公益性行业科研专项项目(200904072)
