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首页> 外文期刊>Journal of Crystal Growth >Crystallization habit of calcium carbonate in the presence of sodium dodecyl sulfate and/or polypyrrolidone
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Crystallization habit of calcium carbonate in the presence of sodium dodecyl sulfate and/or polypyrrolidone

机译：十二烷基硫酸钠和/或聚吡咯烷酮存在下碳酸钙的结晶习性

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摘要

The synthesis of calcium carbonate (CaCO_3) crystals from aqueous solutions containing sodium dodecyl sulfate (SDS), poly(N-vinyl-l-pyrrolidone) (PVP), or SDS/PVP complexes has been performed through a slow titration method. It was found that aragonite and calcite co-existed in the prepared crystals. The formation of aragonite in the precipitation systems without magnesium ions indicates that at ambient temperature ca. 26.0℃, initially formed amorphous CaCO_3 could also transfer into aragonite in the sedimentary phase, which indicates the controlling factor of organic additives in the nucleation and growth process of CaCO_3 crystals. The appearance of hexagonal crystals in the suspensible phase confirmed the hexagonal crystallization cell of vaterite, and revealed the colloidal-dispersion function of the SDS/PVP complex in the crystallization process of CaCO_3.
机译：已通过缓慢滴定法从含有十二烷基硫酸钠（SDS），聚（N-乙烯基-1-吡咯烷酮）（PVP）或SDS / PVP配合物的水溶液中合成碳酸钙（CaCO_3）晶体。发现在制备的晶体中文石和方解石共存。在没有镁离子的沉淀系统中文石的形成表明在环境温度下约25℃。在26.0℃时，最初形成的非晶态CaCO_3也可以在沉积相中转移到文石中，这表明有机添加剂是CaCO_3晶体成核和生长过程的控制因素。悬浮相中六方晶体的出现证实了球ate石的六方晶胞，并揭示了在CaCO_3结晶过程中SDS / PVP配合物的胶体分散功能。

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