PAA/PEO comb polymer effects on rheological properties and interparticle forces in aqueous silica suspensions

Whitby, Catherine P.; Scales, Peter J.; Grieser, Franz; Healy, Thomas W.; Kirby, Glen H.; Lewis, Jennifer A.; Zukoski, Charles F.

doi:10.1016/s0021-9797(03)00179-6

Cited by 76 publications

(49 citation statements)

References 18 publications

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“…Results of the current study also agree well with the findings of a previous study which was carried by Whitby et al 17 According to the results of this previous study adsorbed PEO layers impart steric stabilization to silica dispersions. Some evidence was also found for depletion interactions in the presence of significant concentrations of unadsorbed PEO.…”

Section: Effect Of Stirring Timesupporting

confidence: 93%

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: Effect Of Stirring Timesupporting

confidence: 93%

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 effects of poly(acrylic acid)(PAA)-Poly(ethylene) (PEO) comb polymer dispersant on the rheological properties and interparticle forces in aqueous silica suspensions under varying pH conditions were investigated [231]. The comb polymer was found to adsorb more strongly under acidic condition than basic condition, indicating that the PAA backbone of the copolymer preferentially adsorbs onto silica surfaces with the PEO teeth extending out from the surface into the solution.…”

Section: Competition Among Polymersmentioning

confidence: 99%

Adsorption of organic molecules on silica surface

Parida¹,

Dash²,

Patel³

et al. 2006

Advances in Colloid and Interface Science

605

360

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“…Whitby et al [12] investigated the interactions between silica particles in the presence of PAA/PEO comb polymers. Similarly Deliormanlı et al [13] showed that PAA/PEO comb polymers are effective dispersants for PMN/water system.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of anionic polyelectrolyte and comb polymers onto lead magnesium niobate

Şakar‐Deliormanlı

Çelik

Polat

2008

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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This paper presents the results concerning the adsorption mechanism of polyacrylic acid (PAA) and polyacrylic acid/polyethylene oxide (PAA/PEO) comb polymer onto lead magnesium niobate (PMN) powders. In the study adsorption behavior of PAA and PAA/PEO onto PMN surface were determined in aqueous solutions and the influence of pH and ionic strength was investigated. Results showed that adsorption of PAA or PAA/PEO increased with decreasing pH of the suspensions. The increase in the ionic strength or the presence of divalent cations caused an increase in the adsorption of both polyelectrolytes. It was observed that the adsorption reaches a maximum when PAA is fully complexed in solution. On the other hand, the increase in the adsorption of PAA/PEO onto PMN in the presence of monovalent or divalent salt was attributed to the decrease in the electrostatic forces rather than complex formation with the divalent metal ions in solution. Turbidity measurements showed that there is no complex formation between the divalent metal ions and PAA/PEO comb polymers due to shielding effect of the PEO teeth.

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PAA/PEO comb polymer effects on rheological properties and interparticle forces in aqueous silica suspensions

Cited by 76 publications

References 18 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

Adsorption of organic molecules on silica surface

Adsorption of anionic polyelectrolyte and comb polymers onto lead magnesium niobate

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