Development of Kaolinite-DMSO Intercalation Composites

In this paper,kaolinite-DMSO intercalation composites were prepared and characterized.The influence factors on intercalation,such as V(DMSO)∶V(H2O),intercalation time and temperature,were discussed mainly.Experiment data show that DMSO(dimethyl sulfoxide) can directly insert between the inner layer of kaolinite.As a result,the C-axis spacing(d001) of kaolinite-DMSO intercalation composite increased to 1.085 1 nm from 0.695 0 nm of kaolinite.The concentration of DMSO could be greatly reducd by using ultrafine crashing kaolinite,together with higher intercalation rate.If the reaction conditions were controlled,the intercalation rate can reach 99%.Fourier transform infrared(FT-IR) spectra indicate that DMSO insert the inner layer of kaolinite,which form hydrogen bond with the inner and inner surface hydroxyl of kaolinite.SEM results show that the lamellar structure of kaolinite is destroyed to a extent because of intercalation reaction.