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Modification of montmorillonite,Using different phosphonium salts, study their effect upon the structure | ||
| journal of al-qadisiyah for pure science(quarterly) | ||
| Article 1, Volume 11, Issue 1, 2011, Pages 60-69 PDF (0 K) | ||
| Author | ||
| Saadon A.Aowda | ||
| Abstract | ||
| In this study, sodium montmorillonite was modified using three organic phosphonium salts triphenylphosphonium chloride (Tpp-Cl), octyl triphenylphosphonium bromide (C8tpp-Br) and hexadecyl triphenylphosphonium bromide (C16 tpp-Br). Fourier transform infrared (FTIR) spectroscopy was used to identify the functional groups of organo-montmorillonites (OMMTs). Basal spacing and thermal stability of OMMTs were investigated by X-ray diffraction (XRD) and thermogravimetric analysis (TGA) respectively. Elemental analysis was used to identify the composition of modified sodium montmorillonites. Optimum conditions of cationic exchange capacity (CEC) were studied in order to determine the optimum amount of phosphonium salt used for modification of clay. The X-ray diffraction results show that the basal spacing of the treated clay with Tpp-Cl, C8tpp-Br and C16 tpp-Br increased to 1.51, 1.91 and 2.42 nm, respectively. FTIR spectra illustrate that phosphonium salts were intercalated into the clay layers. Elemental analysis results indicate that phosphonium cations were successfully exchanged with Na present in the clay layers. Thermal analysis provides an indication of the stability of the OMMTs. | ||
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