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.