Studies on microcapsules View Full Text


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Article Info

DATE

1973-04

AUTHORS

K. Takahashi, M. Koishi, T. Kondo

ABSTRACT

Electrophoretic mobilities were measured on sulfonated and carboxylated polyphthalamide microcapsules prepared by the interfacial polycondensation method in the presence of various cations. The zeta-potentials were then calculated using the mobility data by means of theHelmholtz-Smoluchowski equation. Different cations lowered the zeta-potential to different degrees. A modifiedGouy-Chapman equation was used to calculate the surface charge densities in the electrokinetic plane of shear from the zeta-potentials. The surface charge densities increased with increasing concentration of cations, suggesting the increase in the surface ionization. The use ofStern's adsorption theory made it possible to estimate the free energy of cation binding of the microcapsules from the surface charge density data. The values of free energy of cation binding thus obtained were comparable to those for carboxylic acid surface reported in the literature. The charge reversal spectra for the microcapsules were also obtained from the electrokinetic data. More... »

PAGES

232-235

References to SciGraph publications

  • 1969-12. Calcium ion binding to blood cell surfaces in CELLULAR AND MOLECULAR LIFE SCIENCES
  • Identifiers

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    http://scigraph.springernature.com/pub.10.1007/bf01498645

    DOI

    http://dx.doi.org/10.1007/bf01498645

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