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Smectite that has reacted for 48 h with hexadecyltrimethylammonium (HDTMA) cations equivalent to 1.0 and 2.5 times the cation exchange capacity (CEC) converts to HDTMA-smectite. The microstructure of this organoclay is observed using X-ray diffraction (XRD), scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM). When the Na cations in the interlayer of clay...
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