Abstract
An experimental investigation on streaming potentials of porous plugs of cellulose in both the linear and the non-linear range is described. The variation of the electrokinetic coefficients as a function of fibre concentration in the porous pad has been studied, using solutions of different concentration of Congo Red dye as a permeant. The trend observed for changes of both linear electrokinetic coefficientL 21 and non-linear coefficientL 211 as packing density,c F, increases, is somewhat analogous, the similarity suggesting some proportionality between both coefficients. The electroviscous effect accounts for the decrease ofL 211 with the increase ofc F. The coefficientL 221 was found to be always negative and, in absolute value, to decrease with increasingc F. Second-order coefficients have been interpreted in terms of modifications of “generalized conductivities” produced by the changes of thermodynamic forces.
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Gonzàlez-Fernandez, C.F., Espinosa-Jimènez, M. & Gonzàlez-Caballero, F. The effect of packing density of cellulose plugs on streaming potential phenomena. Colloid & Polymer Sci 261, 688–693 (1983). https://doi.org/10.1007/BF01415041
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DOI: https://doi.org/10.1007/BF01415041