Abstract

The dependence of the zeta-potential of the surface of the synthesized under hydrothermal conditions silicates of the subgroup of kaolinite (Al₂Si₂O₅(OH)₄ ⋅ nH₂O) with spherical, spongy, and platy particle morphologies on the pH of the medium is studied for the first time. It is shown that all the synthesized samples change the sign of the surface from negative (in alkaline and neutral media) to positive (in an acidic medium), and the effect most vividly manifests itself in the case of aluminosilicates with a spongy morphology, for which the ζ-potential of the surface varies from −39.9 to 13.5 mV in the range of pH values from 10 to 2, respectively.

中文翻译：

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不同形貌高岭石族合成铝硅酸盐表面Zeta电位变化的特征

摘要

在水热条件下合成的具有球形、海绵状和片状颗粒形态的高岭石亚群（Al ₂ Si ₂ O ₅ (OH) ₄ ⋅ n H ₂ O）的硅酸盐表面的 zeta 电位的依赖性首次研究了培养基的 pH 值。结果表明，所有合成的样品都将表面符号从负（在碱性和中性介质中）变为正（在酸性介质中），并且这种效果在具有海绵状形态的铝硅酸盐的情况下表现得最明显，例如在 pH 值范围从 10 到 2 的范围内，表面的 ζ 电位分别从 -39.9 到 13.5 mV 变化。