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Formation and structures of anisotropic gels

II. Electron-microscopic investigation of anisotropic calcium alginate gels

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Summary

The electron-microscopic investigation of various zones of the anisotropic calcium alginate gel obtained by the up-ward diffusion of 10% calcium acetate solution into 2% sodium alginate solution has been carried out. The compounds were prepared by the “freeze-etching” method.

The microstructures of two types, reticular and compact ones, are shown to be present in the anisotropic calcium alginate gels. The reticular structure is observed in the dropwise exfoliation zone, in the capillary zone, in the zone of “lenses” and in the “forezone”. The compact one is observed in the membrane and in the zone of “lenses”.

Zusammenfassung

Es wurden verschiedene Zonen des Kalziumalginatgels, die bei der aufsteigenden Diffusion einer Kalziumazetatlösung in eine 20%ige Natriumalginatlösung entstehen, mikroskopisch durch Gefrierätzung untersucht.

Es wurde gezeigt, daß in den anisotropen Kalziumalginatgelen kompakte und netzartige Mikrostrukturen auftreten. Die Netzstruktur wird in der Kapillarzone, in der Linsenzone und in der Vorzone beobachtet. Die kompakte Struktur beobachtet man in der Membran-und der Linsenzone.

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References

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Obolonkova, E.S., Belavtseva, E.M., Braudo, E.E. et al. Formation and structures of anisotropic gels. Colloid & Polymer Sci 252, 526–529 (1974). https://doi.org/10.1007/BF01558145

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  • DOI: https://doi.org/10.1007/BF01558145

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