Preparation of organoclay based on Thuan Hai (Vietnam) clay modified by glyceride mixture

Abstract

In this study, in order to have a new organo-clay, we have used a non-ionic surfactant (glyceride mixture) to modify Thuan Hai clay(Viet Nam). Mono and di- glyceride mixture has been synthesized from linseed oil by trans-esterification reaction using the catalytic of base. By the analysis of thin chromatography method, the synthesized sample  includes the majority monoglyceride. Before the modification process, Thuan Hai clay has been pretreated by the purification method to remove the impurity of quartz (SiO₂), and the   X-ray diffraction (XRD) has shown that purified  Thuan Hai clay has a d-spacing  d₀₀₁~ 10Ǻ . And after the modification  of  clay, it was  found that the interlayer distance of modified clay using ethanol as the solvent  is  about 15-16Ǻ ,  while  that modified clay using non – solvent method is better and  has the interlayer distance about 18-20 Ǻ .