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Suspension effect of poly(styrene-ran-methacrylic acid) latex particles on crystal growth of calcium carbonate

机译:聚苯乙烯-甲基丙烯酸甲酯乳液对碳酸钙晶体生长的悬浮作用

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摘要

The template-directed nucleation of inorganic materials by organic supramolecular frameworks is an overarching principle in biomineralization. In the present work, synthesized latex particles of poly(styrene-ran-methacrylic acid) were used as additives for the crystallization modification of calcium carbonate (CaCO3). The influence of latex particles on the crystallization behavior was investigated by means of transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and thermal gravimetry analysis (TGA). The results indicate that not only the concentrations of polymer latex but also the pH values of the initial polymer latex solution affect the controlling effect of latex particles on the CaCO3 Crystalline phase. Another interesting phenomenon is that freshly prepared latex particles induced the formation of a clear organic/inorganic interface, while the addition of flocculated latex suspension generated the unique concave calcites, which might be attributed to the dissolution of vaterite in the precipitated crystals.
机译:有机超分子骨架对无机材料进行模板定向成核是生物矿化中的首要原则。在本工作中,合成的聚(苯乙烯-甲基丙烯酸甲酯)胶乳颗粒用作碳酸钙(CaCO3)结晶改性的添加剂。通过透射电子显微镜(TEM),扫描电子显微镜(SEM),X射线衍射(XRD)和热重分析(TGA)研究了乳胶颗粒对结晶行为的影响。结果表明,不仅聚合物胶乳的浓度而且初始聚合物胶乳溶液的pH值都影响胶乳颗粒对CaCO 3结晶相的控制效果。另一个有趣的现象是,新鲜制备的乳胶颗粒可诱导形成透明的有机/无机界面,而加入絮凝的乳胶悬浮液则会产生独特的凹方解石,这可能归因于球v石在沉淀晶体中的溶解。

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