聚天冬氨酸复配物的合成、阻垢缓蚀性能和阻垢机理

SYNTHESIS,PERFORMANCE AND MECHANISM OF SCALE AND CORROSION INHIBITION OF POLYASPARTIC ACID COMPOSITE

由聚天冬氨酸(PASP),丙烯酸-丙烯酸酯-衣康酸三组分共聚物(AA-AE-IA)和2-膦酸丁烷-1,2,4-三羧酸(PBTCA)制备了 PASP 三元复配物 PASP+AA-AE-IA+PBTCA,研究了 PASP 和 PASP 复配物的阻垢缓蚀性能,利用扫描电子显微镜和 X 射线衍射技术表征了水垢试样中 CaCO_3的晶型。结果表明,最佳复配比例m(PASP):m(AA-AE-IA):m(PBTCA)=3:1:1,得到的 PASP 复配物具有优异的阻垢和缓蚀效果。采用水体总硬度为639 mg/L 的地下水,PASP 复配物的用量为40 mg/L 时,对 CaCO_3的静态浓缩阻垢率可达98.7%,缓蚀率可达96.5%;PASP 复配物可以使 CaCO_3的晶型几乎全部由方解石和文石转变为球霰石结构。

Polyaspartic acid （PASP） composite material, a scale and corrosion inhibitor, was prepared from PASP, acrylic acid-acrylic ester-itaconic acid tripolymer （AA-AE-IA） and 2-phosphonobutane1,2,4-tricarboxylic acid （PBTCA）. The scale inhibition effects of PASP and PASP composite were investigated. Calcium carbonate crystal in scale samples was characterized by SEM and XRD. Experimental results showed that the optimal mass ratios of m（PASP） ： rn（AA-AE-IA） ： m（PBTCA） is 3 ： 1 ： 1. Under the conditions of Ca^2＋ 639 mg/L and PASP composite 40 mg/L, the scale inhibition rate and corrosion inhibition rate are 98.7% and 96.5%, respectively. SEM and XRD results showed＇that calcite and aragonite can be transformed into vaterite completely by using PASP composite.