聚(柠檬酸-天冬氨酸)的合成及其阻垢缓蚀性能

采用热缩聚法制备了聚(柠檬酸-天冬氨酸),并用红外光谱和凝胶色谱对其进行了表征。采用静态阻垢法研究了不同条件下制备的聚(柠檬酸-天冬氨酸)对硫酸钙的阻垢性能。采用电化学方法研究了在3.5%(质量分数)氯化钠溶液中聚(柠檬酸-天冬氨酸)对铜的缓蚀性能。结果表明:当天冬氨酸与柠檬酸物质的量之比为1∶1时,制备的聚(柠檬酸-天冬氨酸)(产物C)对硫酸钙的阻垢性能最好,阻垢率达97%,其在3.5%氯化钠溶液中对铜的缓蚀效果也很好。当产物C质量浓度为200mg/L时,对铜的缓蚀率可达81.6%。即制备的聚(柠檬酸-天冬氨酸)具有良好的阻垢缓蚀性能。

Synthesis of Aspartic Acid/citric Acid Copolymer and Its Anti-scaling and Inhibition Performance

Poly (citric acid/ aspartic acid),P(CA/ASP) was prepared by thermal polycondensation method.The synthesized copolymer P(CA/ASP) was characterized by FTIR spectra and size exclusion chromatography (SEC).The scale inhibition performance of P(CA/ASP) against CaSO4 was evaluated by static scale inhibition method,and the inhibition ratio of P(CA/ASP) was studied by electrochemical method.The results show that the molar ratio of reaction reagents (citric acid and aspartic acid) was 1 ∶ 1 (product C),the scale inhibition rate against CaSO4 was up to 97％.The inhibition performunce of product C is good.When the concentration of product C in 3.5％ sodium chloride solution was 200 mg/L,the corrosion inhibition rate for copper could reach 81.6％.P(CA/ASP) has excellent scale inhibition performance against CaSO4 and corrosion inhibition performance for copper.