淀粉接枝丙烯酰胺的合成及其絮凝性能的研究  

Study on the synthesis of starch graft acrylamide copolymer and its flocculent effect

作　　者：柴莉娜[1] 张广成[1] 孙伟民[1] 赵二伟[1] 

机构地区：[1]西北工业大学理学院,陕西西安710072

出　　处：《应用化工》2009年第9期1313-1316,共4页Applied Chemical Industry

摘　　要：以玉米淀粉(St)和丙烯酰胺(AM)单体为原料,采用过硫酸钾引发剂合成了淀粉接枝丙烯酰胺共聚物(St-g-AM)。用红外光谱对接枝共聚物进行了结构表征,用粘度法测定了分子量。讨论了聚合反应的各个因素对接枝共聚反应的影响,考察了接枝共聚物的絮凝性能。结果表明,以接枝效率为考察目标,其最佳的合成工艺为:引发剂的浓度为0.07 g/100 mL,淀粉与丙烯酰胺的质量比为1∶2.2,反应温度为65℃,反应时间3 h。淀粉接枝丙烯酰胺共聚物比430万分子量的聚丙烯酰胺(PAM)对高岭土水样的絮凝性能更好,当接枝共聚物的投加量为6 mg/L时,对高岭土水样的浊度去除率达到81.77%。最佳条件所合成出的淀粉接枝丙烯酰胺的分子量为75万。The starch graft copolymers was synthesized with taking cornstarch and acrylamide as raw materials by using potassium persulfate as initiator. The structure of the copolymer was confirmed by FTIR and the molecular weight was tested by viscosity law. The factors of polymerization to graft copolymerization re- action has been discussed and the flocculating property of the copolymer product was determined using a- queous suspension of kaolin. The optimum conditions were that concentration of initiator was 0.07 g/100 mL,m（cornstarch） ： m（acrylamide） was 1：2.2 ,reaction temperature was 65℃ ,reaction time was 3 h. The flocculation experiment reveals that comparing to the PAM which the molecular weight was four point three million,the product has the same flocculent effect to aqueous suspension of kaolin. When the graft copolymer flocculant is 6 mg/L, the removal rate of turbidity can reach 81.77%. The molecular weight will reach 750 thousand at the optimum conditions.

关 键 词：玉米淀粉 丙烯酰胺 接枝共聚 絮凝性能 分子量 

分 类 号：TQ314.253[化学工程—高聚物工业]