聚丙烯酰胺改性膨润土防渗材料的制备及其表征

以吉林省刘房子地区天然膨润土为主要原料,采用水溶液聚合法,在室温条件下,首次通过改性聚丙烯酰胺对膨润土进行直接插层改性,制备了一种新型聚丙烯酰胺改性膨润土防渗材料。结合表征结果讨论了不同改性聚丙烯酰胺加入量对改性膨润土材料结构的影响,结果表明,聚丙烯酰胺加入量为30%的改性膨润土比表面积较原土增大,粒径分布较好;XRD表征结果说明,聚丙烯酰胺插层使膨润土的层间距变化不大,对膨润土的其它部分的结构及形貌等未产生影响,d001的峰比较尖锐,说明聚丙烯酰胺在膨润土中分散性较好;SEM表征显示改性膨润土表面的不规整程度明显增加;IR分析结果说明膨润土层间存在聚丙烯酰胺。

Preparation and characterization of polyacrylamide modificated bentonite as impermeability material

A new type of modified bentonite impermeable material is prepared by direct intercalation polymerization of modified polyacrylamide at room temperature with Na-base bentonite from Jilin Liufangzi as raw material.The effect of amount of the modified polyacrylamide on structure of the modified bentonite impermeable material is discussed through the analysis of characterization results.The results show that the specific surface area of the modified bentonite modified by 30% polyacrylamide is bigger than that of the original bentonite,distribution of its particle size is better.X-ray diffraction(XRD) results show that spacing of layers of polyacrylamide modified bentonite changed little and the structure and morphology of other parts are not affected,and peak of d001 is sharp,which shows that dispersion of polyacrylamide in bentonite is good.SEM characterization results show that the irregularity of surface of modified bentonite significantly increased.IR analysis results show that there is polyacrylamide among layers of bentonite.