Diffusion in polyacrylamide gels |
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Authors: | W. Brown R.M. Johnsen |
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Affiliation: | Institute of Physical Chemistry, University of Uppsala, Box 532, S-751 21 Uppsala, Sweden |
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Abstract: | Using a novel sorption technique, the diffusion of some series of solutes in polyacrylamide gels has been investigated with regard to: (a) molecular size of solute; (b) concentration of solute and gel polymer; and (c) temperature. The approach used also yields the partition coefficient pertaining to sorption equilibrium. The ratio, , where Do refers to diffusion in the pure solvent, is found to reflect in part the characteristic interactions between solute and gel polymer. The temperature results indicate that the apparent activation energy for solute diffusion is approximately independent of the polymeric component for dilute gels. |
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