微波干法制备阳离子淀粉絮凝剂及其应用

Preparation and Application of Cationic Starch Flocculant Using Microwave Radiation in Dry Process

以 3-氯 - 2 -羟丙基三甲基氯化铵为阳离子醚化剂 ,天然物质淀粉为原料 ,微波干法制得季铵型阳离子淀粉絮凝剂。通过正交试验 ,研究了各种因素对合成的影响 ,确定了最佳反应条件。结果表明 :阳离子醚化剂与淀粉摩尔比 0 35、NaOH与阳离子醚化剂摩尔比 1 2、微波功率 184W、辐射时间 5min时 ,产物相对黏度为 3 18,阳离子取代度为 0 31。

The cationic starch flocculant bearing quaternary ammonium groups was synthesized using natural polymeric starch as raw material and 3-chloro-2-hydroxypropyl-trimethyl ammonium chlorate as cationic etherifying agent by microwave Radiation in dry process. The flocculant has good flocculation and bactericidal function. The effects of miscellaneous factors on synthesis were investigated and the optimum conditions were determined from orthogonal test. The result showed that the relative viscosity of product was 3.18 and the degree of cation substitution was 0.31 when the molar ratio of cationic etherifying agent to starch was 0.35, the molar ratio of NaOH to cationic etherifying agent was 1.2, microwave power was 184?W, and the radiation time was 3?min.