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以高取代度的阳离子淀粉为原料,硝酸铈铵为引发剂,制备了高取代度阳离子淀粉—丙烯酰胺接枝共聚物,研究了丙烯酰胺与阳离子淀粉质量比、反应温度、反应时间、引发剂浓度对接枝率和接枝效率的影响。结果表明:接枝率和接枝效率最高的条件为丙烯酰胺与阳离子淀粉质量比2.5∶1,反应温度55℃,反应时间3h,引发剂浓度2.5mmol/L。将合成的聚合物用于废水处理,高取代度阳离子淀粉—丙烯酰胺接枝共聚物的用量为4mg/L对麦草浆中段废水的处理效果最好,废水CODcr去除率为34.1%,浊度的去除率为13.5%。
The high degree of substitution of cationic starch as raw material, ceric ammonium nitrate as initiator, the preparation of a high degree of substitution cationic starch - acrylamide graft copolymer, acrylamide and cationic starch mass ratio, reaction temperature, reaction time, initiator Effect of concentration on grafting rate and grafting efficiency. The results showed that the highest graft ratio and grafting efficiency were the ratio of acrylamide to cationic starch was 2.5:1, the reaction temperature was 55 ℃, the reaction time was 3 h, and the initiator concentration was 2.5 mmol / L. The synthesized polymer was used for wastewater treatment. The dosage of cationic starch - acrylamide graft copolymer with high degree of substitution of 4mg / L was the best, the CODcr removal rate of wastewater was 34.1%, the turbidity The removal rate is 13.5%.