天冬氨酸-谷氨酸共聚物的阻垢机理

Scale inhibition mechanism of aspartic acid-glutamic acid copolymer

摘要:

天冬氨酸-谷氨酸共聚物(PAG)具有优良的阻垢性能,为保障其安全广泛地应用到各个领域,对PAG的阻垢作用机理进行研究,以CaCO3和CaSO4为研究对象,对有无阻垢剂(PAG)条件下的CaCO3和CaSO4晶体进行XRD和SEM测试,并计算CaCO3晶体表面的分维数.结果表明:PAG改变了CaCO3晶体的晶格结构,破坏了CaSO4晶体的微晶构造.PAG抑制CaCO3和CaSO4结垢的主要作用机理分别表现为晶格畸变作用和吸附及随后的分散作用.

Abstract:

Aspartic acid-glutamic acid copolymer has good inhibition to CaSO4 and CaCO3.In order to ensure its application security in various fields,scale inhibition mechanism of PAG was studied.X-ray diffraction(XRD) and scanning electron microscopy(SEM) were used to analyze CaCO3 crystal and CaSO4 crystal with and without the scale inhibitor.And fractal dimension of CaCO3 crystal was calculated.The results show that the configuration of CaCO3 crystal lattice has been changed,the structure of CaSO4 crystallite has been broken.The main mechanisms of PAG inhibition to CaCO3 crystal and CaSO4 crystal are lattice distortion and cohesion and the following dispersion respectively.