中文摘要：

以乙酸乙酯为剥离介质,采用超声法剥离有机蒙脱石（CTA-MMT）和层状双氢氧化物（Mg Al-SDS-LDH）,以聚乙烯醇（PVA）为交联剂,采用层层自组装（LBL）的方法制备了蒙脱石-层状双氢氧化物异构薄膜（PVA/MMT/PVA/LDH）n。采用X射线衍射分析（XRD）、透射电子显微镜（TEM）、扫描电子显微镜（SEM）、原子力显微镜（AFM）和紫外-可见光分光光度计对样品进行了表征。结果表明,超声剥离处理后的CTA-MMT和Mg Al-SDS-LDH片层厚度分别达到17 nm和12 nm。（PVA/MMT/PVA/LDH）n异构薄膜层间距为1.81 nm,一个组装循环得到以MMT和LDH纳米片层构成薄膜单循环片层,厚度约为170 nm。薄膜对264 nm左右的光呈现强烈的吸收带,并且吸收强度与薄膜厚度之间呈线性关系,表明薄膜单元层具有良好均一性。

英文摘要：

Organo-montmorillonite（CTA-MMT） and organic-layered double hydroxide（Mg Al-SDS-LDH）were exfoliated by ultrasonication in ethyl acetate.Heterogeneous films of（PVA/MMT/PVA/LDH）nwas fabricated by layer-by-layer self-assembly（LBL） using exfoliated MMT and LDH nanosheets as assembly unit.The specimens were characterized by X-ray diffraction（XRD）,transmission electron microscopy（TEM）,scanning electron microscopy（SEM）,atomic force microscopy（AFM） and UV-vis spectroscopy.The results show that the thickness of exfoliated CTA-MMT and exfoliated Mg Al-SDS-LDH nanosheets is about 17 nm and 12 nm,respectively.The spacing of the heterogeneous films is 1.81 nm.Each unit layer of heterogeneous films was comprised of CTA-MMT and Mg Al-SDS-LDH nanosheets inone deposited cycle with each unit thickness of 170 nm.UV-vis spectroscopy shown that the heterogeneous films exhibited a strong absorption band at wavelength around 264 nm.The linear relationship between absorbance and thickness of the heterogeneous films indicate the homogeneous structure of（PVA/MMT/PVA/LDH）n.