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Descripción
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| New organically modified clays have been obtained from sodium montmorillonite, using either a cationic polyelectrolyte (polyethylenimine) or a novel homemade bisphenol-A silane as modifiers. The modification processes have been carried out in different reaction media, in order to study the effects on the prop- erties of the modified clays of several reaction parameters, such as the pH of the polyethylenimine solution or the nature of the solvent used in the silanization. The obtained clays were characterized using Keywords: X-ray diffraction, thermogravimetric analysis, and FTIR spectroscopy. Clays modified with polyelectrolyte Clay or silane show significant increases in the basal spacing. The properties of polyelectrolyte-modified clays Interlayer spacing depend on the pH of the treating solution. The increase in the basal spacing of polyelectrolyte-modified Thermogravimetric analysis clays varies only slightly with the pH; however, this reaction parameter clearly determines the total Polyethylenimine amount of polyelectrolyte introduced in the clay. The properties and applications of silane-modified clays Silane are strongly dependent on the presence of water in the reaction media used for the silanization. These results have been explained by considering that the reaction conditions determine the nature and the amount of material intercalated into the clay. | |
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Internacional
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JCR del ISI
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Si |
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Título de la revista
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JOURNAL OF COLLOID AND INTERFACE SCIENCE |
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ISSN
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0021-9797 |
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Factor de impacto JCR
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2,443 |
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Información de impacto
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Volumen
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342 |
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DOI
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10.1016/j.jcis.2009.10.014 |
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Número de revista
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0 |
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Desde la página
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185 |
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Hasta la página
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191 |
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Mes
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ENERO |
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Ranking
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