Determination of effective charge numbers of polydisperse polyelectrolyte

A method for direct determination of the effective charge numbers for the species of a polydisperse polyelectrolyte is presented. This method is based on a stationary convective diffusion process across a porous membrane. Its theoretical basis lies on the thermodynamics of irreversible processes. As...

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Bibliographic Details
Published inJournal of colloid and interface science Vol. 124; no. 1; pp. 328 - 335
Main Authors Kontturi, Anna-Kaisa, Kontturi, Kyösti
Format Journal Article
LanguageEnglish
Published San Diego, CA Elsevier Inc 1988
Elsevier
Subjects
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Charge density
Solvent effect
Polyelectrolyte
Chemical solution
Polydispersed polymer
Temperature
Experimental test
Electric field
Ionic strength
PH
Lignosulfonate
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Summary:A method for direct determination of the effective charge numbers for the species of a polydisperse polyelectrolyte is presented. This method is based on a stationary convective diffusion process across a porous membrane. Its theoretical basis lies on the thermodynamics of irreversible processes. As a model substance we used lignosulfonate and our results agree with the literature data. With the present method it is easy to study the effect of various parameters (e.g., pH, solvent, temperature, ionic strength, etc.) on the charge numbers. Furthermore, with the present method the pre-fractionation of the polydisperse polyelectrolyte is unnecessary.
ISSN:0021-9797
1095-7103
DOI:10.1016/0021-9797(88)90354-2