Electrokinetic effects of adsorbed neutral polymers |
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| Authors: | M A Cohen Stuart F H W H Waajen S S Dukhin |
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| Institution: | (1) Present address: Laboratory for Physical and Colloid Chemistry, Agricultural University, Wageningen, The Netherlands;(2) Present address: Institute of Colloid and Water Chemistry, Academy of Science of the Ukrainian S.S.R., 252180 Kiev, USSR |
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| Abstract: | On the basis of a previously developed hydrodynamic model for adsorbed polymers the charge flow along a charged interface with adsorbed (uncharged) polymer is calculated. An effective electrokinetic layer thickness is defined and its dependence on the characteristics of the adsorbed polymer and the ionic strength is studied. It is found that tails are very important for the hydrodynamic effects considered because they effectively screen the solvent flow from inner parts of the absorbed layer. The electrokinetic layer thickness increases with decreasing ionic strength, and tends to a limit equal to the hydrodynamic thickness at very low ionic strength. |
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| Keywords: | Electrokinetic layer thickness adsorbed polymer |
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