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Surface forces between adsorbed polyelectrolytes in salt solution

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Trends in Colloid and Interface Science VII

Part of the book series: Progress in Colloid & Polymer Science ((PROGCOLLOID,volume 93))


Highly charged cationic polyelectrolyte was adsorbed onto mica from 10−4 M KBr and 10−4 M K2SO4 solutions. The results show that the structure of the adsorbed layer and the total amount adsorbed is dependent on the anion valency. Both the layer thickness and the adsorbed amount increase when the salt anion is of higher valency. — Desorption over several days into 10−4 M K2SO4 solution was followed. This indicates the adsorbed layer initially overcompensates the mica lattice charge. After some time, the sign of the charge is re-reversed, due to desorption. Adhesion between the adsorbed layers increases during the desorption process. This adhesion is attributed to bridging of entropic origin.

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P. Laggner O. Glatter

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© 1993 Dr. Dietrich Steinkopff Verlag GmbH & Co. KG

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Dahlgren, M.A.G., Claesson, P.M. (1993). Surface forces between adsorbed polyelectrolytes in salt solution. In: Laggner, P., Glatter, O. (eds) Trends in Colloid and Interface Science VII. Progress in Colloid & Polymer Science, vol 93. Steinkopff.

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  • Publisher Name: Steinkopff

  • Print ISBN: 978-3-7985-0955-9

  • Online ISBN: 978-3-7985-1676-2

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