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Effect of surfactant agent upon the structure of montmorillonite 总被引:2,自引:2,他引:0
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. 相似文献
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采用界面吸附法制备了5种十八/杂多阴离子杂化LB膜ODA/HPA(HPA=PW12,PMo12,MPo12,PW6Mo6,PW9Mo3,P2Mo18).对5种本合物在空气/水界面上单分子膜的行为进行了研究,它们有较高的崩溃压46.0-48.0mN,m^-1,均能开稳定的单分子膜,用红外光谱,紫外光谱,小角X射线衍射(LXRD)和荧光光谱对LB膜的沉积特性与结构进行了鉴定,结果表明,制备的LB膜具有中心对称性,其层状结构由杂多阴离子的单层与表面活性剂双层交替组成。 相似文献
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