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Mg3Al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Gly-Mg3AlLDHs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noly∶ nNo3=1∶2的条件下制备的Gly-Mg3AlLDHs剥离效果最好,剥离后形成的无机聚合粒子的zeta电位介于35 mV～40 mV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.
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