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A Simple Method to Determine Critical Coagulation Concentration from Electrophoretic Mobility

机译:一种简单的方法,用于确定电泳迁移率的关键凝固浓度

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Critical coagulation concentration (CCC) is a key parameter of particle dispersions, since it provides the threshold limit of electrolyte concentrations, above which the dispersions are destabilized due to rapid particle aggregation. A computational method is proposed to predict CCC values using solely electrophoretic mobility data without the need to measure aggregation rates of the particles. The model relies on the DLVO theory; contributions from repulsive double-layer forces and attractive van der Waals forces are included. Comparison between the calculated and previously reported experimental CCC data for the same particles shows that the method performs well in the presence of mono and multivalent electrolytes provided DLVO interparticle forces are dominant. The method is validated for particles of various compositions, shapes, and sizes.
机译:临界凝固浓度(CCC)是颗粒分散体的关键参数,因为它提供了电解质浓度的阈值极限,因此由于快速颗粒聚集而使分散体破坏。建议计算方法以使用单独的电泳迁移率数据来预测CCC值,而无需测量粒子的聚集速率。该模型依赖于DLVO理论;包括排斥双层力和有吸引力的范德沃尔斯力量的贡献。对于相同粒子的计算和先前报道的实验性CCC数据之间的比较表明,该方法在单一的存在下表现良好,提供多价电解质,提供DLVO颗粒部件是显性的。该方法被验证用于各种组合物,形状和尺寸的颗粒。

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