Effect of cationic surfactant adsorption on the rheological and surface properties of bentonite dispersions

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• 作者：Ebru G&#xfc ; nister ; Sevim İ ; f ; ç ; i ; Nevin Ö ; ztekin ; F. Bedia Erim ; Ö ; . If ; ı ; k Ece and Nurfer G&#xfc ; ng&#xf6 ; r
• 关键词：Bentonite ; Cationic surfactant ; Adsorption ; Rheology ; Zeta potential
• 刊名：Journal of Colloid and Interface Science
• 出版年：2006
• 期刊代码：125_00219797
• 类别：ch
• 出版时间：1 November 2006
• 卷：303
• 期：1
• 页码：137-141
• 文件大小：150 K

摘要

In this study, the adsorption, bridging, and intercalation effects of a cationic surfactant, benzyldimethyltetradecyl ammonium chloride (BDTDACl), on bentonite clay suspensions was investigated. The adsorption, rheological behaviors, and colloidal properties of the clay dispersions were determined as a function surfactant concentration. Adsorption isotherms were obtained using the batch-equilibrium technique. The rheological behavior of the clay suspensions was obtained by shear stress-shear rate measurements within 0–350 s⁻¹ shear rates. The structure of the composite particles was analyzed by using X-ray diffraction analysis and it was found that the expansions of basal d-spacings are less than 16.80 Å, suggesting a monolayer structure.