Fe^(2+)-H_2O_2引发体系对淀粉接枝共聚改性为絮凝剂的影响研究  

Impact of Fe^(2+)-H_2O_2 Initiation System on the Modified Starch Preparing the Flocculating Agent

作　　者：张延霖[1] 张秋云[1] 

机构地区：[1]华南师范大学化学与环境学院,广东广州510006

出　　处：《江苏化工》2007年第1期23-25,共3页Jiangsu Chemical Industry

摘　　要：为克服引发剂铈盐较昂贵,工业应用难的缺点,实验采用Fe2+-H2O2引发体系引发丙烯腈接枝改性淀粉,采用接枝率和接枝效率作为评价接枝效果的指标,详细研究了接枝的工艺及其引发剂浓度、丙烯腈单体的用量和接枝温度对接枝率和接枝效率的影响。接枝后对接枝淀粉的结构分析表明:淀粉大分子上已接枝上丙烯腈单体;接枝反应不仅发生在淀粉的无定形区也发生在结晶区,且接枝后接枝淀粉的结晶度有所提高。In order to overcome the defects of expensive Ce4+ salt and the difficulty in industrial application,the influence of the initiator concentration,the dosage of acrylonitrile and temperature on the ration and efficiency of grafting was studied with Fe^(2+)-H_2O_2 initiation system, assessing the grafting ratio and grafting efficiency as the evaluation index. The structural analysis confirmed the grafting of acrylonitrile monomer to the starch molecules, and this reaction occurred on either crystalline or amorphous areas of starch. Further,the crystalline of grafting starch increased after the grafting procedure.

关 键 词：絮凝剂 淀粉 接枝 引发体系 

分 类 号：TQ314.253[化学工程—高聚物工业]