阳离子单体DBPMA合成及改性聚丙烯酰胺的研究

【作者】 朱驯；

【导师】 王风云；

【作者基本信息】 南京理工大学 ， 应用化学， 2007， 硕士

【摘要】 该文以丙烯酸、氯化亚砜、二甲氨基乙醇和氯化苄为起始原料，通过酰化、酯化及季铵化三步反应合成一种新型的阳离子单体N，N-二甲基，N—苄基，N—丙烯酰胺基氯化铵（DBPMA），并采用红外光谱、核磁共振、质谱等对其结构进行了表征。通过对合成工艺进行优化，得到了DBPMA的最佳合成工艺条件。将上述阳离子单体与丙烯酰胺（AM）共聚制备了阳离子型DBPMA／AM共聚物（以下简称DBPMA／AM），研究了不同物质的量之比、聚合温度、引发剂浓度、反应时间对聚合物絮凝性能的影响。结果表明，在采用K₂S₂O₈引发体系下聚合的最佳工艺条件为：物质的量之比为1∶6，反应温度为60℃，引发剂量为0.8％，反应时间为3h。得到的聚合物的阳离子度α=8.13％、分子质量M=4.77×10⁷。通过性能评定实验表明，P（DBPMA／AM）对高岭土模拟废水，活性污泥进行处理，絮凝效果较好，并且所形成的絮体具有絮体大、沉降速度快等特点。更多还原

【Abstract】 In this paper, one cationic monomer N, N-dimethyl, N- benzyl, N-propyleneamido ammonium chloride（DBPMA） was systhesized from acrylic acid, thoinly chloride, ethanol dimethylamine through acylation, esterification and quatemization. The structure of the cationic monomer was characterized by IR, ¹HNMR and mass spec- trum. The optimal synthetic route of DBPMA was made by studying the reaction temperature, the ratio of raw material and solvent and so on.The copolymer of P（DBPMA/AM） was prepared by the cationic monomer obtained above and acrylamide. And the effect on flocculation of the copolymer was studied by the reaction time, the ratio of raw material, polymerization temperature and concen- tration of initiator. Results show, the optimal route of polymerization under K₂S₂O₈ as initiator was temperature 60℃, reaction time 3h and mole ratio n（cationic mono- mer ）: n（Acrylamide） =1:6. The cationic degree of the copolymer is 8.13%,and mole- cular weight is 4.77×10⁷. Experimental results indicate that P（DBPMA/AM） has great effect on flocculation of kaolin suspension samples or activated sludge, and the rate of sediment was fast and big.更多还原