Direct measurement of the depletion interaction in binary solutions of polyelectrolytes

Biggs, Simon (2010) Direct measurement of the depletion interaction in binary solutions of polyelectrolytes. Physical Chemistry Chemical Physics, 12 16: 4172-4177. doi:10.1039/b924680k


Author Biggs, Simon
Title Direct measurement of the depletion interaction in binary solutions of polyelectrolytes
Journal name Physical Chemistry Chemical Physics   Check publisher's open access policy
ISSN 1463-9076
1463-9084
Publication date 2010-01-01
Sub-type Article (original research)
DOI 10.1039/b924680k
Volume 12
Issue 16
Start page 4172
End page 4177
Total pages 6
Place of publication Cambridge, United Kingdom
Publisher R S C Publications
Language eng
Abstract Direct measurements of a depletion interaction between silica surfaces immersed in binary mixtures of non-adsorbing sodium poly(styrene sulfonate) have been made with an atomic force microscope. Variations in the secondary minimum depletion interaction as a function of binary mixture composition were recorded for a number of polymer molecular weights. The position and depth of the minimum in the force data was seen to depend on both the binary mixture composition and the choice of polymer molecular weights used in the mixture. For binary mixtures containing a low molecular weight polymer at a concentration near to or below the chain overlap concentration (C*) the position and depth of the minimum was seen to depend strongly on the properties of this low molecular weight component. This is consistent with previous theory predictions that depletion interactions in binary polymer mixtures will be controlled by the smaller component which can reside within the depletion layer of the higher molecular weight component.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Faculty of Engineering, Architecture and Information Technology Publications
 
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