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To study how anionic surfactant sodium dodecyl sulfonate (SDS) and cationic surfactant cetyltrimethylammonium chloride (CTAC) enter the interlayer spaces of montmorillonite, montmorillonite, CTAC and SDS were exchanged consecutively and simultaneously. Three parameters were investigated: reaction times, surfactants contents and addition sequences. The results of XRD, thermal analysis and sulfur analysis...
Three kinds of salt solutions including NaCl, CaCl 2 and MgCl 2 , were used to modify the expansion of vermiculite. X-ray diffraction results indicate that vermiculites have been successfully modified by salt solutions. The d (002) reflection spacings of Na-vermiculite, Ca-vermiculite and Mg-vermiculite corresponding to different salt solution modifications are 1.223nm, 1.474nm...
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