title: Effect of cationic surfactant adsorption on the rheological and surface properties of bentonite dispersions.
abstract: 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 A, suggesting a monolayer structure.
authors.affiliation: Istanbul Technical University, Department of Physics, Maslak 34469 Istanbul, Turkey.
authors.forename: Ebru
authors.initials: E
authors.lastname: Günister
authors.forename: Sevim
authors.initials: S
authors.lastname: Işçi
authors.forename: Nevin
authors.initials: N
authors.lastname: Oztekin
authors.forename: F Bedia
authors.initials: FB
authors.lastname: Erim
authors.forename: O Işik
authors.initials: OI
authors.lastname: Ece
authors.forename: Nurfer
authors.initials: N
authors.lastname: Güngör