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首页> 外文期刊>Journal of Thermal Analysis and Calorimetry >Effect of surfactant agent upon the structure of montmorillonite
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Effect of surfactant agent upon the structure of montmorillonite

机译：表面活性剂对蒙脱土结构的影响

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摘要

The modification of sodium montmorillonite (MMT) through the incorporation of amphiphilic octadecylammonium cations in various concentrations (10–200% CEC) into the clay’s interlayer spaces has been studied. High resolution thermogravimetric analysis shows that the thermal decomposition of modified montmorillonite occurs in three steps. The first step of mass loss is related to dehydration of adsorbed water and water hydrating metal cations such as Na+. The second step of mass loss is attributed to the decomposition of surfactant. The third step is due to the loss of OH units during the dehydroxylation of the montmorillonite. The conformation of the surfactant cations in the confined space of the silicate galleries is investigated by X-ray diffraction analysis. These analyses are very important for any attempt to incorporate the organomodified MMT particles into different media for various applications such as polymer nanocomposite preparation.
机译：研究了通过将各种浓度（10-200％CEC）的两亲性十八碳铵阳离子掺入粘土的层间空间来改性蒙脱土（MMT）。高分辨率热重分析表明，改性蒙脱石的热分解过程分为三个步骤。质量损失的第一步与吸附水的脱水和水合金属阳离子（如Na +）有关。质量损失的第二步归因于表面活性剂的分解。第三步是由于蒙脱石脱羟基过程中OH单元的损失。通过X射线衍射分析研究了在硅酸盐通道的密闭空间中表面活性剂阳离子的构象。这些分析对于将有机改性的MMT颗粒掺入到不同介质中以进行各种应用（例如聚合物纳米复合材料制备）的尝试中非常重要。

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