Abstract
An organic cation [C 18mim] + formed from [C 18mim]Br, a type of ionic liquid, can go into the interlayer of sodium montmorillonite (MMT) through the ion-exchanging reaction. The adsorption state, the adsorption amount, and the aggregative structures of [C 18mim] + in the interlayer of MMT have been investigated by thermogravimetric analysis (TGA), wide-angle X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). The results indicated that there is a maximum chemical adsorption of [C 18mim] + in the interlayer of MMT, but the total amount of adsorbed [C 18mim] + in the interlayer of MMT increases with that of the physical adsorption of [C 18mim] +. With an increasing amount of adsorbed [C 18mim] + in the interlayer of MMT, the aggregative structures of [C 18mim] + become more ordered, leading to an obvious increase of the interlayer distance of MMT.
Published Version
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