聚天冬氨酸/邻氨基酚磺酸的合成及其阻垢性能

Synthesis of polyaspartic acid/3-amino-4-hydroxybenzenesulfonic acid graft copolymer and its scale inhibition performance

摘要:

以邻氨基酚磺酸（3A4HBSA）与聚琥珀酰亚胺(PSI)为原料，合成了聚天冬氨酸接枝共聚物阻垢剂PASP/3A4HBSA。用FTIR与1HNMR对阻垢剂的结构进行了表征，用静态阻垢法考察了PASP/3A4HBSA和聚天冬氨酸(PASP)对碳酸钙的阻垢性能。得到的最佳实验条件为：当阻垢剂质量浓度为100mg/L、温度为70℃、时间24h、pH =7时，PASP/3A4HBSA对CaCO3的阻垢率达到92.7%，而PASP对CaCO3的阻垢率只有77.1%。用SEM与XRD对处理前后的垢样表面结构和物相结构进行了表征，并分析阻垢剂的阻垢机理，用红外光谱测定进一步分析阻垢剂的阻垢机理，结果表明：阻垢剂对CaCO3的作用主要包括晶格畸变作用和络合作用。

Abstract:

Polyaspartic Acid/3-Amino-4-hydroxybenzenesulfonic acid Graft Copolymer (denoted as PASP/3A4HBSA) was synthesized via the reaction of 3-Amino-4-hydroxybenzenesulfonic(3A4HBSA) and polysuccinimide (PSI). The obtained graft copolymer (PASP/3A4HBSA) was characterized by FTIR and 1HNMR. The static scale inhibition method was used to evaluate the scale inhibition behavior of PASP/3A4HBSA and PASP against calcium carbonate. The experimental results showed that: Under the condition of single variable experiment, PASP/3A4HBSA possessed the best scale inhibition property against CaCO3. Inhibition efficiency of PASP/3A4HBSA reached 92.7%, but that of PASP was only 77.1% when the dosage was 100 mg/L in the experiment at 70℃, 24h, pH=7. The scale surface structure and phase structure before and after treatment were characterized by SEM and XRD,Further analysis of the scale inhibition mechanism of the scale inhibitor against CaCO3 was analyzed by FTIR. And it was found that the scale inhibition was mainly caused by lattice distortion of CaCO3, complexation of the scale inhibitor and Ca2+．