| Abstract: The intercalation efficiency of kaolinite/dimethyl sulfoxide(DMSO) and kaolinite/N-methyl formamide(NMF) was evaluated by intercalation ratio from XRD, weight loss from TGA and intensity ratio of 3 600 to 3 700 cm-1 from FTIR. The results show that, for the 1, 6 and 25 d intercalation compounds, the intercalation ratio of kaolinite/DMSO is 5%, 52% and 89%, respectively, and 93%, 94% and 95%, respectively, for kaolinite/NMF intercalation, the weight loss of kaolinite/DMSO is 1.06%, 8.06% and 17.46%, while that of kaolinite/NMF intercalation is 6%, 6.5% and 14.2%, respectively, the intensity ratio of 3 600 to 3 700 cm-1 for kaolinite/DMSO is 1.03, 1.141 and 1.628, reapectively, and 1.403, 1.433 and 1.612 for kaolinite/NMF intercalation. The results from three different evaluation methods are agreed well. The XRD method is more sensitive than TGA and FTIR at low intercalation stage, however, when the intercalation increases, TGA and FTIR methods become more sensitive than XRD method. |
