十二烷基硫酸钠插层水滑石-蒙脱石的制备与表征（英文）

Preparation and Characterization of Lauryl Sulfate Anion Intercalated Hydrotalcite-Montmorillonite

十二烷基硫酸根插层水滑石-蒙脱石(DDS-LDH-MMT)是一种新型复合层状材料。本实验采用自组装法制备DDS-LDH-MMT,首先采用离子交换法制备出十二烷基硫酸根阴离子插层水滑石(DDS-MMT),然后,用超声法分别将DDS-MMT和钠蒙脱石(Na-MMT)进行剥离,最后将这两种溶胶体系混合制备出DDS-LDH-MMT复合插层材料。探讨了溶剂种类、超声时间以及DDS-MMT与Na-MMT质量比对DDS-LDH-MMT结构的影响。XRD测试表明DDS-LDH-MMT具有周期性层状结构,SEM分析显示其具有片状形貌和层状结构,FTIR谱进一步说明DDS进入到水滑石和蒙脱石的层片之间。结果表明,以氯仿为溶剂,超声0.25h,DDS-MMT和Na-MMT摩尔比为1:1时制备的复合材料的层状结构较好。

Lauryl sulfate anion intercalated hydrotalcite-montmorillonite(DDS-LDH-MMT) was a new complex layered material. DDS-LDH-MMT was synthesized by a self-assemble method. The lauryl sulfate anion intercalated hydrotalcite(DDS-LDH) was firstly prepared by an ion-exchange method, and then sodium montmorillonite(Na-MMT) and DDS-LDH were exfoliated in the different solvents using an ultrasonic method. Lastly, two sols with different sheets of DDS-LDH and Na-MMT were mixed to form the DDS-LDH-MMT. The influences of solvents, ultrasonic time, and mass ratios of Na-MMT and DDS-LDH on the structure of DDS-LDH-MMT were discussed. XRD pattern shows that DDS-LDH-MMT possesses a periodic layered structure. SEM images verify that DDS-LDH-MMT has the sheet shape and layered structure. FTIR spectra indicate DDS enters the interlayer of LDH-MMT. The optimized experimental condition is the mass ratio of Na-MMT and DDS-LDH 1:1, the ultrasonic time 0.25 h, and the solvent chloroform.