改性聚乙二醇多磺酸基水处理剂的制备及性能

Preparation and Properties of Modified Polyethylene Glycol Polysulfonate Scale Inhibitor

摘要:

以过硫酸铵为引发剂，以马来酸酐改性聚乙二醇得到的聚乙二醇酯（PEGMA）、乙烯基磺酸钠（SVS）、丙烯酸（AA）为单体，通过水相自由基共聚反应制备目标共聚物PEGMA-SVS-AA。考察了聚合工艺对其阻碳酸钙垢性能的影响，利用红外光谱对共聚物结构进行表征，得到最佳聚合反应条件为：n(PEG200MA): n(SVS): n(AA)为1:3:5，过硫酸铵用量为单体总质量的6%，反应时间2.5 h，控制反应温度为80 ℃。该条件下制备的聚合物PEGMA-SVS-AA在模拟工业生产循环冷却水条件下，其阻碳酸钙垢率达到89%。使用XRD和SEM对碳酸钙垢进行了表征，该水处理剂不仅改变了碳酸钙的形貌而且改变了碳酸钙的晶型。

Abstract:

A novel scale inhibitor, polyethylene glycol ester / sodium vinyl sulfonate / acrylic acid (PEGMA-SVS-AA), was synthesized using polyethylene glycol ester (PEGMA) with sodium vinyl sulfonate (SVS) and acrylic acid (AA) monomer as raw materials. Synthesized target copolymer PEGMA-SVS-AA was using ammonium persulfate as initiator. The effect of polymerization process on the performance of calcium carbonate scale inhibition was investigated. The copolymer PEGMA-SVS-AA was determined by infrared. The experiment showed that when the monomer ratio n(PEG200MA) ): n(SVS): n(AA) is 1:3:5, the amount of ammonium persulfate is 6% of the total amount of monomers, the reaction time is 2.5 h, and the control reaction temperature is 80 °C, simulating the industrial production cycle cooling water conditions. The rate of calcium carbonate inhibition reached 89%. The effects of initiator dosage, time and reaction temperature on the performance of the synthesized water treatment agent were investigated. Carbonate scale was characterized using XRD and SEM, which not only altered the morphology of the calcium carbonate but also changed the crystal form.