title: Synthesis and scale inhibitor performance of polyaspartic acid.
abstract: Polyaspartic acid (PASP) has been extensively studied in recent years as a green scale inhibitor. PASP was synthesized by thermal polycondensation of maleic anhydride and ammonium carbonate in this study. The optimal polycondensation reaction conditions were the raw material (maleic anhydride and ammonium carbonate) molar ratio of 1.0:1.2, the polymerization temperature of 180°C and reaction time of 2.0 hr. The results showed that PASP exhibits very good scale inhibiting performance. The inhibition rate was 95% for calcium carbonate and 90% for calcium sulfate by the application of 5 mg/L PASP.
authors.affiliation: Nanjing Guoneng Enviro-protection Project Co., Ltd., Nanjing 210029, China; College of Environmental and Chemical Engineering, Dalian Jiaotong University, Dalian 116028, China.
authors.forename: Zhengyan
authors.initials: Z
authors.lastname: Liu
authors.affiliation: College of Environmental and Chemical Engineering, Dalian Jiaotong University, Dalian 116028, China.
authors.forename: Yonghong
authors.initials: Y
authors.lastname: Sun
authors.affiliation: College of Environmental and Chemical Engineering, Dalian Jiaotong University, Dalian 116028, China.
authors.forename: Xiaohui
authors.initials: X
authors.lastname: Zhou
authors.affiliation: Dalian Development Centre of Environmental Technology, Dalian 116001, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Wu
authors.affiliation: College of Environmental and Chemical Engineering, Dalian Jiaotong University, Dalian 116028, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Tian
authors.affiliation: College of Environmental and Chemical Engineering, Dalian Jiaotong University, Dalian 116028, China.
authors.forename: Yingzhan
authors.initials: Y
authors.lastname: Wang
mesh_terms: D001224:Aspartic Acid / Q000031:analogs & derivatives / Q000737:chemistry; D002119:Calcium Carbonate / Q000737:chemistry; D002133:Calcium Sulfate / Q000737:chemistry; D010455:Peptides / Q000138:chemical synthesis* / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D010455:Peptides; C017645:polyaspartate; C025252:poly-DL-succinimide; D001224:Aspartic Acid; D002119:Calcium Carbonate; D002133:Calcium Sulfate