Max-Planck-Institute of Colloids and Interfaces, Colloid Chemistry, Research Campus Golm, Potsdam-Golm, Germany.
Phys Chem Chem Phys. 2011 Oct 6;13(37):16811-20. doi: 10.1039/c1cp21328h. Epub 2011 Aug 23.
A titration set-up coupling ion selective electrodes with pH adjustment was used to analyze the effects of additives present during precipitation of calcium carbonate. Besides industrially well-established antiscalants (sodium triphosphate, citrate, polyacrylate and poly(aspartic acid)), also functional polymers being active in morphosynthesis (polystyrene sulfonate and poly(styrene-alt-maleic acid)) were analyzed. Interestingly each additive acts in its specific way, suggesting the notation "fingerprinting" for a complex interplay of up to five "solution modes" of influencing CaCO(3) precipitation and crystallisation. The results provide new insights into the modes of additive controlled crystallisation, and in the long run, the insights may facilitate the design of precipitation systems that yield complex and tailor-made crystals.
采用滴定装置将离子选择性电极与 pH 调节耦合，分析了在碳酸钙沉淀过程中存在的添加剂的影响。除了工业上常用的阻垢剂（三聚磷酸钠、柠檬酸盐、聚丙烯酸和聚天冬氨酸）外，还分析了在形态合成中具有活性的功能聚合物（聚苯乙烯磺酸盐和苯乙烯-马来酸共聚物）。有趣的是，每种添加剂都以其特定的方式起作用，这表明多达五种“溶液模式”的复杂相互作用会对碳酸钙沉淀和结晶产生影响，这种复杂的相互作用可以用“指纹”来表示。这些结果为添加剂控制结晶的模式提供了新的见解，从长远来看，这些见解可能有助于设计产生复杂和定制晶体的沉淀系统。
