Last modified: 2018-07-25
Abstract
The aim of the present study is the effect of the anion on the electrical parameters in the case of montmorillonite interlaced with different ionic liquid. At first, the preparation of two new ionic liquids 3-methyl-1-(4-vinylbenzyl)-imidazol-3-ium sulfate and phosphate has been synthesis in the two-steps. For the first step, we change the previous synthetic route using 4-vinylbenzyl chloride as starting material, and with 1-methylimidazole to prepare the 3-methyl-1-(4-vinylbenzyl)-imidazol-3-ium chloride[VBMIM-Cl-].In the second stage, we have exchanged the anion Cl- with HSO4- and H2PO4-.Our samples are characterized by 1H NMR, 13C NMR and FT-IR. This clay montmorillonite has been intercalated by three ionic liquids [VBMIM-Cl], [VBMIM-HSO4] and [VBMIM-H2PO4]. X-ray diffraction (XRD) shows an increase in the interlayer space for the modified montmorillonite comparing to the Na-Montmorillonite.
In other hand, dielectric spectroscopy reveals that the choice of anion reacted with the ionic liquid has a very important effect on the electrical parameters (conductivity and permittivity).