绿色阻垢剂MA/SSS聚合物的表征及其阻垢性能

Characterization and Scale Inhibition Performance of Green Scale Inhibitor MA/SSS

为丰富绿色水处理剂聚环氧琥珀酸(PESA)的功能性官能团,优化其阻垢性能,以马来酸酐(MA)和苯乙烯磺酸基盐(SSS)为原料,利用固体超强酸SO_4^(2-)/TiO_2-SiO_2为催化剂,熔融聚合了新型含苯乙烯磺酸基聚合物(MA/SSS)。采用红外光谱(FT-IR)和凝胶渗透色谱(GPC)对聚合物进行表征;采用静态试验考察了其CaCO_3阻垢效果,并用扫描电镜(SEM)、能谱仪(EDS)和X射线衍射仪(XRD)测试探讨了MA/SSS的CaCO_3阻垢机理。结果表明:MA/SSS具有羧基、磺酸基和苯环等一系列特征峰,其数均相对分子量Mw为4 174;在相同条件下,与PESA相比,MA/SSS适用于高钙环境且用量小。机理研究表明,MA/SSS干扰或抑制了球霰石进一步结晶生长,形成无定形沉渣。

The scale inhibitor （MA/SSS） was prepared based on maleic anhydride （MA） and styrene p-sulfonic sodium （SSS） as monomers, and solid superacid SO2-4/TiO2-SiO2 as a catalyst by the direct melt polymerization. The copolymer was systematically characterized by FF-IR and gel permeation chromatography （GPC）. Static experiment was used to investigate the scale inhibition efficiency to CaCO3, and the scale inhibition mechanisms were studied by scanning electron microscope （SEM）, energy disperse spectroscopy （EDS） and X- ray diffractometer （XRD）. Results showed that MA/SSS had some functional groups, such as styryl, sulfonic acid groups, carboxylic groups and so on, and the average molecular weight was 4 174. Under the same conditions, compared with PESA, MA/SSS was more suitable for the higher calcium environment while its required dosage was less. Besides, the mechanism analysis showed that MA/SSS could interfere or inhibit the growth of the initial phase of vaterite, which resulted in the formation of amorphous sediment.