2007
DOI: 10.1016/j.jeurceramsoc.2006.04.117
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Synergistic effect of polymer-surfactant mixtures on the stability of aqueous silica suspensions

Abstract: 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 loadi… Show more

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Cited by 14 publications
(5 citation statements)
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“…It means that in such systems, the adsorption layer is the most expanded towards the bulk solution. These mixtures exhibit a strong synergetic effect [ 39 ]. Among them the values of the zeta potential obtained are quite similar.…”
Section: Resultsmentioning
confidence: 99%
“…It means that in such systems, the adsorption layer is the most expanded towards the bulk solution. These mixtures exhibit a strong synergetic effect [ 39 ]. Among them the values of the zeta potential obtained are quite similar.…”
Section: Resultsmentioning
confidence: 99%
“…The interfacial behaviors of EO m PO n EO m solutions in the presence of solid surfaces, both mineral and polymeric, have been investigated by a number of authors. ,− For example, by using atomic force microscopy, Brandani and Stroeve reported on the formation of a uniform and monolayer-like adsorbed structure of EO m PO n EO m copolymers on hydrophobic surfaces. Rojas and co-workers investigated the adsorption of EO 37 PO 56 EO 37 triblock copolymer on different types of surfaces, namely, polypropylene, poly(ethylene terephthalate), nylon, graphite, cellulose and silica.…”
Section: Introductionmentioning
confidence: 99%
“…This is because the stability of the suspension depends on the particle size of silica particles in the system 16. From this result, it may be explained that the stabilization of silica suspension results from the adsorption of surfactant (PEO–PPO–PEO block copolymers) by the hydrogen bonding between the hydrophilic PEO groups and the silanol groups on silica surface 13. As a consequence, the less polar PPO group points out in the solution and provide steric barrier between silica particles leading to the delay of large aggregation formation 13.…”
Section: Resultsmentioning
confidence: 99%
“…To overcome the bonding forces after wetting the silica as well as maintain the stability of the silica suspension during storage, a surfactant is also added in the system. In this work, polyethylene oxide‐polypropylene oxide‐polyethylene oxide triblock copolymers (PEO–PPO–PEO triblock copolymers), consisting of two hydrophilic PEO chains and a hydrophobic PPO chain, are chosen because they generally give good stabilization ability 13. The silica suspensions prepared by ultrasonic probe and mechanical stirrer are used for preparing silica/CR vulcanizates.…”
Section: Introductionmentioning
confidence: 99%