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

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 a...

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Published in:Journal of colloid and interface science 2006-11, Vol.303 (1), p.137-141
Main Authors: Günister, Ebru, İşçi, Sevim, Öztekin, Nevin, Erim, F. Bedia, Ece, Ö. Işık, Güngör, Nurfer
Format: Article
Language:English
Subjects:
Adsorption
Bentonite
Cationic surfactant
Chemistry
Exact sciences and technology
General and physical chemistry
Rheology
Surface physical chemistry
Zeta potential
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description 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. Around 6 mmol/L surfactant addition gives the maximum flocculation, as after further addition the system begins defloculate.
doi_str_mv 10.1016/j.jcis.2006.07.021
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subjects Adsorption
Bentonite
Cationic surfactant
Chemistry
Exact sciences and technology
General and physical chemistry
Rheology
Surface physical chemistry
Zeta potential
title Effect of cationic surfactant adsorption on the rheological and surface properties of bentonite dispersions
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