Systematic Study of the Effects of Polyamines on Calcium Carbonate Precipitation
Systematic Study of the Effects of Polyamines on Calcium Carbonate Precipitation
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DOI：
10.1021/cm500523w
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发表时间：
2014-04
影响因子：
8.6
通讯作者：
Anna S. Schenk;Bram Cantaert;Yi‐Yeoun Kim;Yuting Li;E. S. Read;M. Semsarilar;S. Armes;F. Meldrum
中科院分区：
文献类型：
--
作者：
Anna S. Schenk;Bram Cantaert;Yi‐Yeoun Kim;Yuting Li;E. S. Read;M. Semsarilar;S. Armes;F. Meldrum
虽然带负电的有机添加剂被广泛用作控制 CaCO3 沉淀的有效手段，但带正电的添加剂通常被认为活性要低得多。然而，最近研究表明，阳离子聚电解质聚（烯丙胺盐酸盐）对 CaCO3 沉淀具有显着的控制作用，推动薄膜和纤维的形成，其他例子表明许多带正电的添加剂可促进球霰石的形成。本文旨在汇集这些有时相互矛盾的关于带正电添加剂活性的观点。研究了一系列多胺对 CaCO3 沉淀的影响，其中选择多胺时可以评估聚合物的胺基类型、pKa 值（相应的共轭酸）、分子量和侧链长度。结果明确表明，带有伯胺基团的多胺能够发挥显着的作用，并且......
While negatively charged organic additives are widely used as an effective means to control CaCO3 precipitation, positively charged additives are generally considered to be much less active. Nevertheless, the cationic polyelectrolyte poly(allylamine hydrochloride) has recently been shown to exert significant control over CaCO3 precipitation, driving the formation of thin films and fibers, and other examples suggest that many positively charged additives promote vaterite formation. This article aims to bring together these sometimes conflicting views of the activity of positively charged additives. The effect of a series of polyamines on CaCO3 precipitation was studied, where the polyamines were selected such that the amine group type, the pKa value (of the corresponding conjugated acid), the molecular weight, and the side chain length of the polymers could be evaluated. The results unambiguously demonstrate that polyamines carrying primary amine groups are capable of exerting a significant effect and that...