کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1523733 | 995329 | 2013 | 5 صفحه PDF | دانلود رایگان |
Sodium bentonite was modified with several organic bis-imidazolium salts. Organoclays with water soluble surfactants were prepared by the traditional cation exchange reaction. The bis-imidazolium-bentonites were characterized by Fourier transform infrared spectroscopy (FTIR), powder X-ray diffraction analysis (PXRD) and thermogravimetric analysis (TGA). The effect of chemical composition and molecular weight of the salts on the thermal stability and basal spacing were evaluated. The bis-imidazolium-bentonites showed enhanced thermal stability (300–400 °C) and may be potentially useful materials for melt processing of polymer/layered silicates nanocomposites.
► Geometry and volume of the molecule influence on interlayer spacing of modified bentonites.
► The intercalation increases with molecule length.
► The modified bentonites have an appreciably higher thermal stability.
Journal: Materials Chemistry and Physics - Volume 138, Issue 1, 15 February 2013, Pages 199–203