中文摘要：

用共沉淀法制备甘氨酸（简称Gly）插层Mg3Al水滑石（简称Gly-Mg3AlLDHs），利用甘氨酸等电点的性质实现了Mg3A1水滑石在pH=3--4水溶液中的剥离，并将剥离出的LDHs纳米片层与蒙脱土进行插层组装，制备出Mg3Al水滑石／蒙脱土层状复合材料。用x射线粉末衍射、红外光谱、N2吸附．脱附以及电泳仪等手段对样品进行了表征。结果表明，制备出的GlyMg3Al LDHs结构规整，晶相单一，甘氨酸以42。的倾角排列于水滑石层间。在nGly：nNO3=1：2的条件下制备的Gly-Mg3Al LDHs剥离效果最好，剥离后形成的无机聚合粒子的zeta电位介于35mV-40mV之间，剥离液可以稳定存在72h。所得层状复合材料的层间距为1．44nm，此值为单元LDHs片层与单元蒙脱土片层的厚度之和，证明LDHs纳米片层与蒙脱土进行了有序交叉叠层。

英文摘要：

Glycine（Gly）was intercalated into Mg3Al layered double hydroxides（Gly-Mg3Al LDHs）by coprecipitation method. The delaminating of Gly-Mg3Al LDHs in aqueous solution of pH=3-4 was realized by making use of the isoelectric point of Gly. Then Mg3Al LDHs/montmorillonite layered composite was gained through inserting LDHs sheets into montmorillonite. The composite was characterized by X-ray dif- fraction （XRD）, Fourier transform infrared （FT-IR）, electrophoresis apparatus and N2-adsorption/desorp- tion measurements. The results show that the formed Gly-Mg3Al LDHs possesses well-defined crystallo- graphic structure. When the raw material ratio is 0.5 （nGly：nNO3=1：2）, the obtained Gly-Mg3Al LDHs exhibits the best performance of delaminating, while the zeta potential of the subsequence colloidal particles is between 35mV and 40mV. Additionally, the translucent colloidal solution may be kept stably for 72h.The interlayer space of the layered composite is 1.44 nm, which is the total thickness of LDHs sheet and montmorillonite sheet. The results prove that LDHs sheets and montmorillonite sheets are layer by layer staggered.