Observation of the Dynamic Colloidal Interaction Forces between Casein-Coated Latex Particles

Observation of the Dynamic Colloidal Interaction Forces between Casein-Coated Latex Particles

We describe a refined version of the particle scattering apparatus due to van de Ven (Langmuir 1994, 10, 3046) for measuring the dynamic interactions between colloidal particles in a flow field. Polystyrene latex particles (diameter 5.1 μm) were studied, stabilized by β-casein and αs1-casein, at pH...

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Bibliographic Details
Published in:Langmuir Vol. 14; no. 13; pp. 3466 - 3469
Main Authors: Murray, Brent S, Dickinson, Eric, McCarney, Joseph M, Nelson, Phillip V, Whittle, Martin
Format: Journal Article
Language:English
Published: Washington, DC American Chemical Society 23-06-1998
Subjects:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Solution and gel properties
Interparticle interaction
Casein
Ionic strength
Particle scattering
Micron size particle
Coated particle
Styrene polymer
Measurement method
Colloidal dispersion
Experimental study
Aqueous dispersion
Latex
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Summary:We describe a refined version of the particle scattering apparatus due to van de Ven (Langmuir 1994, 10, 3046) for measuring the dynamic interactions between colloidal particles in a flow field. Polystyrene latex particles (diameter 5.1 μm) were studied, stabilized by β-casein and αs1-casein, at pH 7 and ionic strengths of 0.1 and 0.01 mol dm-3. The β-casein system exhibited stronger interparticle repulsion and less tendency for particle flocculation at the lower ionic strength. At ionic strength = 0.1 mol dm-3 the αs1-casein system exhibited stronger interparticle repulsion than the β-casein system. This behavior is consistent with other measurements on the properties of casein-coated particles.
Bibliography:istex:231407BCB616C9262F343882EADA3983A3431B79
ark:/67375/TPS-2KZMPSW1-V
ISSN:0743-7463
1520-5827
DOI:10.1021/la9802163