Coupling between polymer adsorption and colloidal particle aggregation

Chaplain, Véronique; Janex, Marie-Laure; Lafuma, F.; Graillat, C.; Audebert, R.

doi:10.1007/bf00660377

Cited by 48 publications

(27 citation statements)

References 12 publications

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“…Furthermore, since nonelectrostatic interactions between the polyelectrolyte and the surface are negligible (63,64), there is no incentive to adopt a flat configuration, and an extended conformation is favored.…”

Section: Effect Of Electrolyte On Adsorbed Layer and Interaction Forcesmentioning

confidence: 98%

The Effect of Salt Concentration on Adsorption of Low-Charge-Density Polyelectrolytes and Interactions between Polyelectrolyte-Coated Surfaces

Rojas

Claesson

Muller³

et al. 1998

Journal of Colloid and Interface Science

115

129

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Section: Effect Of Electrolyte On Adsorbed Layer and Interaction Forcesmentioning

confidence: 98%

The Effect of Salt Concentration on Adsorption of Low-Charge-Density Polyelectrolytes and Interactions between Polyelectrolyte-Coated Surfaces

Rojas

Claesson

Muller³

et al. 1998

Journal of Colloid and Interface Science

115

129

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“…An increase of the adsorbed amount could not be found with modified silica and PEO in water at salt concentrations up to 0.008 mol/l. At higher salt concentrations the dispersion is no longer stable and the determination of the adsorbed amount is accompanied by a large error [33,34].…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Adsorption of polyethylene oxide on surface modified silica - stability of bare and covered particles in suspension

Wind¹,

Killmann

1998

Colloid & Polymer Science

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The adsorption of polyethylene oxide (PEO) on modified colloidal silica and the stability of the aqueous suspension was investigated. With octanol some silanol groups at the silica surface were replaced by octylgroups. The size of the modified silica particles and the charge and chemical groups on the surface were charaterized by ultracentrifugation, photon correlation spectrometry, polyelectrolyte titration and IR spectrometry. The adsorbed amounts of polyethylene oxides of different molar mass were determined on the modified silica in water. With photon correlation spectrometry (PCS) the hydrodynamic layer thickness of the PEO layers on the particles were measured. The dependences of the layer thicknesses on molar mass of the PEO, polymer concentration and adsorption time were determined. The aggregation of the suspended PEO coated and uncoated modified silica particles was examined with PCS by the time dependence of the diffusion coefficient at different salt concentrations. The influence of molar mass and concentration of PEO as well as of the age of the dispersion was explored. The measured dependences are discussed and compared with the behavior of unmodified silica-and latex-particles.

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“…This makes it dicult for the particles to form¯ocs because of electric repulsion caused by the adsorbed cationic polyelectrolytes. This over-dose phenomenon has been demonstrated in many colloidal¯occulation system [18,35]. It is the main reason why f r gradually decreased with more polyDADMAC was used over the optimum dose.…”

Section: Discussionmentioning

confidence: 96%

Flocculation of dilute titanium dioxide suspensions by graft cationic polyelectrolytes

Zhu

Pelton

et al. 1999

Colloid & Polymer Science

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Coupling between polymer adsorption and colloidal particle aggregation

Cited by 48 publications

References 12 publications

The Effect of Salt Concentration on Adsorption of Low-Charge-Density Polyelectrolytes and Interactions between Polyelectrolyte-Coated Surfaces

The Effect of Salt Concentration on Adsorption of Low-Charge-Density Polyelectrolytes and Interactions between Polyelectrolyte-Coated Surfaces

Adsorption of polyethylene oxide on surface modified silica - stability of bare and covered particles in suspension

Flocculation of dilute titanium dioxide suspensions by graft cationic polyelectrolytes

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