环保型三元共聚物丙烯酸二甲氨酯/磺化苯乙烯/马来酸酐的阻垢杀菌性能研究

Synthesis and performance evaluation of MA/SS/DLA copolymer scale inhibitor

以丙烯酸二甲氨基乙酯(DLA)、马来酸酐(MA)、对苯乙烯磺酸钠(SS)等为原料,以K_2S_2O_8为引发剂,通过水相聚合,季铵化反应后合成含烷基、羧基和磺酸基的三元共聚物阻垢剂P(MA-SS-DLA)。探讨了共聚物的投加量、钙离子质量浓度和溶液pH值等因素与共聚物阻垢率的关系以及杀菌性能,并用扫描电镜观测了碳酸钙晶形的变化,采用量子化学方法研究了共聚物P(MA-SS-DLA)对碳酸钙的阻垢性能和结构之间的关系。结果表明,共聚物适宜在Ca^(2+)质量浓度为小于600 mg·L^(-1)的中性循环水中使用;当聚合物投加量为16mg·L^(-1),杀菌12 h后,P(MA-SS-DA)杀菌率还保持73%。

A scale inhibitor of MA/SS/MLA was synthesized from malefic anhydride （MA）, sodium p-styrene sulfonate （SS）, and N,N-Dimethylaminoethyl acrylate （DLA） using K2S208 as initiator in water phase. The relationship between such factors as the polymer dosage Ca2＋ concentration, and solution pH on the scale inibitor are comprehensively discussed, the changes between crystals of the preliminarily studied with environment scanning electronic microscope （SEM） and used quantum chemistry methods to study the relationship between performance and structure of the eopolymer P（MA-SS-DLA） of calcium carbonate scale inhibition. The scale inhibition percentage could reach 72.5 % for CaCO3, and the bacterieidal activity could exceed 73 % in 12 h when 16 mg·L^-1 of the polymer is used.