绿色可降解淀粉接枝改性阳离子化絮凝剂

A Green Degradable Cationic Starch Graft Modified Flocculant

以淀粉和丙烯酰胺为原料,加入醚化剂OMTAM进行接枝共聚反应,得到淀粉接枝改性阳离子化絮凝剂。首先对OMTMA投加量、碱的投加量和反应温度进行了单因素实验研究,并依据单因素实验结果,利用正交实验考察OMTMA的投加量、反应温度、反应时间、及碱的用量对絮凝性能的影响规律。结果表明:当最佳碱的投加量为3 mL、OMTMA的投加量为0.05 mol、反应温度50℃、反应时间60 mins时,絮凝剂对人工合成污水的去除率最佳。利用红外光谱对接枝前后的淀粉、以及接枝阳离子化以后的淀粉进行了结构表征。通过红外图谱对比分析表明,实验成功地对淀粉进行了接枝阳离子化。

Using starch and aeryl amide as raw materials, and OMTAM as etherifying agent ,a cationic starch graft modified coagulant was prepared by graft co - polymerization reaction. The orthogonal experimental design depending on a single factor exporiment result was employed to identify and optimize the reaction factors of OMTMA and alkali dosage, reaction temperature , reaction time. The performances of the flocculation were investigated. The optimized conditions were got as follows： when the alkali dosage is 3 mL, the reaction temperature is 50℃, the OMTMA dosage is 0.05 mol, and the reaction time is 60 min, the floceulant has higher removal rate in artificial wastewater. And the infrared spectroscopy was used to characterize the flocculant structure before and after graft. The IR spectrums of the graft cationic starch after and before modification were compared, and the results proved that a graft cationic starch was successfully obtained.