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Diffusion and sizes of micelles in polymer solutions and gels

  • J.-E. Löfroth
  • P. Hedberg
  • L. Johansson
Conference paper
Part of the Progress in Colloid & Polymer Science book series (PROGCOLLOID, volume 93)

Abstract

The sizes and self-diffusion coefficients of the non-ionic micellar systems octaethylene- and hexaethylene glycol mono n-dodecylether, C12E8 and C12E6, respectively, were studied in gels and solutions of the polyelectrolyte gk-carrageenan in water as functions of polymer and surfactant concentration at 25°C. A recently presented tracer technique [1] was used to determine the self-diffusion coefficient of the surfactant monomer, free or in the aggregated state. The time-resolved fluorescence quenching technique was used to determine aggregation numbers of the micellar aggregates giving the number average aggregation numbers and the standard deviations [2]. The polydispersity was analyzed assuming a Schultz distribution [3] of the aggregation numbers.

Key words

Diffusion micelle polymer gel 

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Copyright information

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

Authors and Affiliations

  • J.-E. Löfroth
    • 1
  • P. Hedberg
    • 1
  • L. Johansson
    • 1
  1. 1.Drug Delivery ResearchAstra Hässle ABMölndalSweden

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