聚天冬氨酸-丝氨酸接枝聚合物的合成及阻垢性能

摘要

Objective To study the scale inhibition of poly (aspartic acid)-serine graft polymer.Methods Poly(aspartic acid)-serine grafted copolymer (PASPSE) was synthesized with polysuccinimide and serine as matrix and monomer respectively.Effects of polymerization time,reaction temperature and molar ratio on the scale inhibition performance of the copolymer were analyzed with the static scale inhibition method.Results The best synthesize addition was gotten as:18 h of reaction,55 ℃,and 1∶1 polysuccinimide/serine.PASPSE had good chelating and dispersing effect on CaCO3 scale.The scale inhibition efficiency of PASPSE on CaCO3 scale decreased with the increase of temperature,time and Rario(mHCO3-∶mCa2+).In the high temperature environment of 90 ℃,the crustation inhibitor efficiency of 10 mg/L PASPSE was 95.5％.Conclusion PASPSE has good scale inhibition performance on CaCO3 in high temperature systems.%目的 研究聚天冬氨酸-丝氨酸接枝聚合物的阻垢性能.方法 以聚琥珀酰亚胺为母体,以丝氨酸为接枝单体,合成出聚天冬氨酸-丝氨酸接枝聚合物(PASPSE),采用静态阻垢法分别考察了聚合时间、聚合温度、原料配比对产物阻垢性能的影响.结果 聚天冬氨酸-丝氨酸接枝聚合物合成的最佳条件为聚合时间18h、聚合温度55℃、聚琥珀酰亚胺与丝氨酸原料配比(摩尔比)为1∶1.该接枝聚合物对CaCO3垢具有良好的螯合分散作用,其CaCO3阻垢率随温度的升高、工作时间的延长、HCO3+与Ca2+含量之比的增大而降低.在90℃高温环境下,10 mg/L PASPSE的阻垢率可达95.5％.结论 在高温水系统中,PASPSE对CaCO3垢具有较好的阻垢性能.