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(MgAl-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MgAl-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.
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