Abstract—In the use of bentonite in different industrial applications, different additives are recommended to optimize the rheological properties of the formulation. In this study, the effect of anionic surfactant sodium dodecyl sulfate (SDS) and cationic surfactant cetyltrimethyl ammonium bromide (CTAB) on the rheological properties of Na-bentonite suspensions was investigated in the concentration range of 1.0×1.0-3 –1.0×1.0-1M. The SDS surfactant was effective in modifying the rheological behavior of bentonite dispersion in the concentration range that corresponds to critical micelle concentration (CMC) and critical coagulation concentrations (CCC) of SDS. On the other hand, the addition of CTAB surfactant to bentonite suspension reduced significantly its viscosity and shifted its behavior from shear thinning with a yield stress toward Newtonian.
Index Terms—Adsorption, bentonite, CTAB, SDS, rheology, Thixotropy.
B. Abu-Jdayil and M. Ghannam are with the Chemical and Petroleum Engineering Department, UAE University, Al Ain, UAE (e-mail: babujdayil@uaeu.ac.ae; mamdouh.ghannam@uaeu.ac.ae).
M. S. Nasser is with the Gas Processing Center, Qatar University, Doha, Qatar (e-mail: m.nasser@qu.edu.qa).
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Cite: Basim Abu-Jdayil, Mamdouh Ghannam, and Mustafa S. Nasser, "The Modification of Rheological Properties of Bentonite-Water Dispersions with Cationic and Anionic Surfactants," International Journal of Chemical Engineering and Applications vol. 7, no. 2, pp. 75-80, 2016.
