Effect of charged colloidal particles on adsorption of surfactants at oil–water interface

Wang, Weixing; Zhou, Zunning; Nandakumar, K.; Xu, Zhenghe; Masliyah, Jacob H.

doi:10.1016/j.jcis.2004.03.049

Cited by 48 publications

(35 citation statements)

References 10 publications

(13 reference statements)

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“…Mm into a fine silica suspension at pH 8 caused significant aggregation and rapid settling of silica particles. 15 This is most probably due to the adsorption of positively charged DDA onto negatively charged silica particles. Adsorption is expected to occur by electrostatic attraction and orientation of the hydrocarbon chain of the DDA molecules is towards the aqueous solution.…”

Section: Stability Of the System By Turbidity Measurementsmentioning

confidence: 99%

Synergistic effect of polymer-surfactant mixtures on the stability of aqueous silica suspensions

Şakar‐Deliormanlı

2007

Journal of the European Ceramic Society

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The aim of the present work was to investigate the effect of cationic/nonionic surfactant mixtures on the dispersion and flocculation behavior of aqueous silica suspensions. In the study dodecylamine (DDA) was used as the cationic surfactant and polyethylene oxide-polypropylene oxidepolyethylene oxide (PEO-PPO-PEO) triblock copolymers were employed as the nonionic surfactant. The dispersion and flocculation behavior of aqueous silica suspensions were studied mainly by turbidity measurements at low solids loading (0.05 vol.%) to observe the stability of the system for a given time period. Rheological measurements were performed at higher solids loadings to determine the viscosity as a function of shear rate. Adsorption behavior of single and mixed surfactants onto silica surface was studied using a total organic carbon analyzer.Results of the study showed that dispersion and flocculation behavior of aqueous silica suspensions depends on the type and concentration of surfactant, cationic/nonionic surfactant ratio and surfactant addition sequence to the system.

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Section: Stability Of the System By Turbidity Measurementsmentioning

confidence: 99%

Synergistic effect of polymer-surfactant mixtures on the stability of aqueous silica suspensions

Şakar‐Deliormanlı

2007

Journal of the European Ceramic Society

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“…8,9 Surfactant adsorption and adsolubilization behavior are important in a number of applications such as surface modification, detergency, lubrication, corrosion inhibition, and mineral flotation. [10][11][12][13][14][15] Adsolubilization results from aggregation of surfactants at the solid-liquid interface which act as a two-dimensional solvent for organic solutes. 16 The inner or core region of the bilayer structure is a nonpolar region that can facilitate the solubilization of nonpolar solute molecules.…”

Section: Introductionmentioning

confidence: 99%

Atomic force microscopy and contact angle studies of polymerizable gemini surfactant admicelles on mica

Asnachinda¹,

O’Haver²,

Sabatini³

et al. 2009

J of Applied Polymer Sci

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Atomic force microscopy (AFM) was used to directly observe and characterize a polymer-modified mica surface prepared using a polymerizable gemini surfactant. Normal tapping mode and contact mode AFM were used to image the treated mica surface morphologies in air and liquid environments, respectively. The root mean square (RMS) roughness of mica surfaces before and after surface modification and polymerization was analyzed from these scans. To determine the effect of styrene adsolubilization on the surfactant-modified mica, AFM measurements of the modified mica were made at various styrene concentrations. Contact angle measurements were also made to further characterize the nature of the surfactant-modified mica surface. The surface morphology and surface hydrophilicity were observed to be different for the modified mica after polymerization. In addition, the polymerized surface maintained its morphology after washing/desorption studies demonstrating the stability of the polymerized surfactant film.

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“…In the 1970s, the enhanced oil recovery (EOR) potential of microemulsions drove an outstanding research effort on surfactant-oil-water systems (SOW) that resulted in a considerable improvement of the knowledge concerning the phase behavior of these systems [4][5][6][7][8][9][10][11][12][13][14][15][16]. Because of the current oil prices, the EOR methods are becoming attractive again, particularly those so-called alkaline-surfactantpolymer (ASP) flooding [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Partitioning of Fatty Acids in Oil/Water Systems Analyzed by HPLC

Bravo

Sánchez

Cáceres

et al. 2007

J Surfact & Detergents

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Surfactant/oil/water systems in which the surface-active substance is a mixture of an undissociated fatty acid (FA) and its sodium salt soap, exhibit the typical phase behavior and the general emulsion phenomenology produced by a formulation scan. The phase behavior transition is induced by changing the FA concentration in the system at a fixed alkaline (NaOH) content in water, which results in a variable lipophilic acid/hydrophilic salt ratio. The partitioning is reported for different FA types (octanoic to myristic) and alcohol co-surfactants between excess oil and water phases of Winsor three-phase optimum formulation system. The concentrations are determined by using a method reported in a previous work to quantify the total acid fraction in each phase.

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Effect of charged colloidal particles on adsorption of surfactants at oil–water interface

Cited by 48 publications

References 10 publications

Synergistic effect of polymer-surfactant mixtures on the stability of aqueous silica suspensions

Synergistic effect of polymer-surfactant mixtures on the stability of aqueous silica suspensions

Atomic force microscopy and contact angle studies of polymerizable gemini surfactant admicelles on mica

Partitioning of Fatty Acids in Oil/Water Systems Analyzed by HPLC

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