Mixed adsorption of poly(vinylpyrrolidone) and sodium dodecylbenzenesulfonate on kaolinite

Torn, L.H.; Keizer, A. de; Koopal, L.K.; Lyklema, J.

doi:10.1016/s0021-9797(03)00046-8

Cited by 65 publications

(46 citation statements)

References 38 publications

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“…Clay particles, with anionic charges at the plate surfaces and pHdependent charges at the edges, have a negative net charge [28,29]. The penetration of cationic surfactants not only changes the surface properties from hydrophilic to hydrophobic but also may change the charge of the raw clay layer from negative to positive if the excess of organic cations available [30][31][32][33].…”

mentioning

confidence: 99%

Structural characterization of hexadecyltrimethylammonium-smectite composites and their potentiometric electrode applications

Çubuk

Çağlar

Topçu

et al. 2015

Applied Surface Science

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mentioning

confidence: 99%

Structural characterization of hexadecyltrimethylammonium-smectite composites and their potentiometric electrode applications

Çubuk

Çağlar

Topçu

et al. 2015

Applied Surface Science

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“…The hydrophobic parts of copolymer molecules can anchored to hydrophobic part of anionic surfactant as it is schematically presented in The surfactant molecules act as a bridge between the mineral surface and hydrophobic block of copolymer. This complex system was created on the schematic representation of PVD-SDBS complexes which was presented by Torn and coworkers [10]. When sodium oleate first interacts with the dolomite surface the mixed sodium oleate (SOL)/Pluronic complexes are formed in which the hydrophobic SOL moiety penetrates the PPO core of Pluronic (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Polymer-surfactant interactions were subject to intensive theoretical and experimental investigations especially at both the solution-air and solid-solution interfaces [10][11][12][13]. Mixed adsorption of polymers and surfactants at solid/liquid interfaces has been studied much less.…”

Section: Introductionmentioning

confidence: 99%

Effect of Pluronics and surfactant adsorption onto dolomite suspension zeta potential and stability

Kozák¹,

Sadowski²

2015

Annales UMCS, Chemia

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Two kinds of Pluronics (PEO-PPO-PEO triblock copolymers) were used in these studies. They have mixed with anionic surfactant (sodium oleate). The adsorption isotherms of surfactant and copolymer-surfactant mixture onto dolomite have been determined. The adsorbed amount of the Pluronics increases with increasing concentration and reaches plateau. An increase of adsorbed amounts of anionic surfactant onto the mineral surfaces (dolomite) has been observed at the presence of Pluronic copolymers. The adsorption effect of triblock copolymers has been investigated on the zeta potential of dolomite at the water suspension. The interaction of anionic surfactant with copolymers causes a decrease of zeta potential to small amount due to the deformation of double electrical layer. The adsorbed non-ionic Pluronic layer partially screens the surface charge of mineral particles, and thus, reduces the zeta potential. On the other hand, the adsorption of anionic surfactant and copolymer caused a decrease of negative value of zeta potential both investigated minerals. The stability of dolomite suspension depends on the both copolymer and sodium oleate concentrations.

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“…Interaction of polycarboxylate-based superplasticiser with clay in Portland cement systems Gao, Ren, Liu, Guo and Li charge) and (b) the ionic conditions of the solution such as pH and ionic strength (Torn et al, 2003). Lei and Plank (2014) reported a negative surface charge on clay.…”

Section: Advances In Cement Researchmentioning

confidence: 99%

Interaction of polycarboxylate-based superplasticiser with clay in Portland cement systems

Gao

Ren

Liu

et al. 2018

Advances in Cement Research

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It is widely accepted that polycarboxylate-based superplasticisers (PCEs) are sensitive to the presence of clay in cement and concrete. The impact of clay content on the adsorption behaviour of PCE on cement grain surfaces was investigated, with the adsorption of PCE on clay and cement grains determined by means of total organic carbon analysis. In addition, the effect of the mixing sequence of clay and PCE in cement paste was also investigated to explore the mechanism of the low clay-tolerance of PCE. The results indicated that the addition of clay reduced the adsorption of PCE on cement grain surfaces. Accordingly, the workability of the cement paste mixed with PCE was also changed with the addition of clay. In the presence of clay, although the total consumption of PCE was increased, the fluidity of the paste decreased. The results from different mixing sequences revealed that, in the presence of clay, the adsorption amount of PCE on cement grain surfaces was highly reduced, leading to poor dispersion of the cement particles. NotationC 0 initial concentration of superplasticiser (SP) solution (mg/ml) C t concentration of SP solution after reaching adsorption equilibrium (mg/ml) c equilibrium concentration of SP solution (g/l) k adsorption constant (l/g) m mass of binder (g) R gas constant (8·314 J/K.mol) V total volume of solution (ml) T absolute temperature (K) Γ adsorbed amount of SP per gram of binder (mg/g) Γ s saturated amount of SP (mg/g) ΔG ads adsorption free energy

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Mixed adsorption of poly(vinylpyrrolidone) and sodium dodecylbenzenesulfonate on kaolinite

Cited by 65 publications

References 38 publications

Structural characterization of hexadecyltrimethylammonium-smectite composites and their potentiometric electrode applications

Structural characterization of hexadecyltrimethylammonium-smectite composites and their potentiometric electrode applications

Effect of Pluronics and surfactant adsorption onto dolomite suspension zeta potential and stability

Interaction of polycarboxylate-based superplasticiser with clay in Portland cement systems

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