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Effect of counterions on complex coacervation

✍ Scribed by Kei-Ichi Tainaka

Book ID
101718073
Publisher
Wiley (John Wiley & Sons)
Year
1980
Tongue
English
Weight
486 KB
Volume
19
Category
Article
ISSN
0006-3525

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✦ Synopsis

Abstract

In a recent paper, we developed a thermodynamic theory on the complex coacervation in the absence of low molecular ions, under the assumption that the coacervation is a condensation phenomenon of aggregates of polyanion and polycation in the aqueous solution, by obtaining the interaction potential U~S~ between these aggregates on the basis of Flory's method. In this paper, we have extended the theory to a more complicated phenomenon of the counterion‐containing solutions. This treatment has led the interaction potential having an additional contribution to U~S~ resulting from an entropy increase by the counterion distribution. The phase diagram between solution (sol) and separated phase has been obtained as a function of the difference of charges between polyanion and polycation. It has been found that the presence of counterions sensitively suppresses the coacervation.

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