淀粉基两性天然高分子改性絮凝剂的合成  

Synthesis of amphoteric starch-based natural polymer modified flocculant

作　　者：马希晨[1] 吴星娥[1] 曹亚峰[1] 

机构地区：[1]大连轻工业学院化工系,大连116034

出　　处：《吉林大学学报（理学版）》2004年第2期273-277,共5页Journal of Jilin University:Science Edition

基　　金：辽宁省科委重大项目基金(批准号:00205002).

摘　　要：以淀粉-丙烯酰胺接枝共聚物为原料,通过Mannich反应和水解反应,合成了同时具有阴、阳离子基团的两性高分子絮凝剂.最佳反应条件为:接枝物、甲醛与二甲胺的摩尔配比为1∶1.1∶1.5,接枝物浓度在2.5%,胺甲基反应温度50℃,反应时间2.5h,阳离子度达50%以上;碳酸钠与氢氧化钠的质量比为1.4∶1,水解剂与接枝物的摩尔配比为1∶1,水解温度为65℃,水解时间3h,阴离子度达23%以上.产物对印染和造纸污水的浊度和化学耗氧量(COD)去除率优于部分水解聚丙烯酰胺(HPAM).The amphoteric polymer flocculant with anion and cation was synthesized with starch-g-polyacrylamide by Mannich reaction and hydrolysis. The optimum reaction condition was obtained as follows: the molar ratio among graft polymer, formaldehyde to dimethyl amine was 1∶(1.1∶1.5,) mass concentration of graft polymer (2.5%,) temperature of methylamine reaction 50 ℃, reaction time (2.5) h, cationic degree 50%; the mass ratio of sodium carbonate to sodium hydroxide (1.4∶1,) the molar ratio of hydrolytic agent to graft polymer 1∶1, hydrolytic temperature 65 ℃, hydrolytic time (3 h,) anionic degree 23%. The turbidity and chemical oxygen demand (COD) removal rate of this product for dyeing factory and paper mill waste water are better than those of HPAM.

关 键 词：两性天然絮凝剂 高分子改性絮凝剂 淀粉 合成 阳离子度 水解度 MANNICH反应 

分 类 号：TQ314.253[化学工程—高聚物工业] O636[理学—高分子化学]