超高分子量阳离子型聚丙烯酰胺合成及其絮凝性能研究

Synthesis and research on flocculation performance of cationic polyacrylamide with ultrahigh molecular weight

聚丙烯酰胺(PAM)的絮凝性能与其分子量成正相关,而阳离子型聚丙烯酰胺(CPAM)在处理含带电悬浮颗粒的污水过程中显著优于聚丙烯酰胺。然而,传统共聚法难以合成超高分子量的阳离子型聚丙烯酰胺,从而限制了其絮凝性能。本项工作以超高分子量聚丙烯酰胺为基板,通过季铵化反应,直接获得了超高分子量的阳离子型聚丙烯酰胺絮凝剂。通过进一步系统探究季铵化反应条件,优化了产物的阳离子度,其絮凝性能也得到极大提高。

The flocculation performance of polyacrylamide(PAM)is positively related to its molecular weight,while cationic polyacrylamide(CPAM)is significantly better than PAM in the treatment of sewage containing charged suspended particles.However,it is difficult to synthesize ultrahigh molecular weight CPAM by traditional copolymerization,which limits its flocculation performance.In this work,ultrahigh molecular weight CPAM flocculant was directly obtained by quaternization reaction with ultrahigh molecular weight PAM as the raw material.Further systematic exploration of quaternization reaction condition,the cationic degree of the product was optimized,and its flocculation performance was greatly improved.