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S. Vasiliu, S. Racovita, V. Neagu, M. Popa, J. Desbrieres

Polymer-metal complexes based on gellan (in English)

Polimery 2010, No 11-12, 839


DOI: dx.doi.org/10.14314/polimery.2010.839

Summary

By dropwise adding solutions of gellan (Gll) or gellan + poly(vinyl alcohol) (PVAL) mixture into different metal salt solutions — FeCl3 · 6 H2O, FeCl2 · 4 H2O, CoCl2 · 6 H2O, CuCl2 · 2 H2O — at 30 °C under constant stirring, preparation of spherical microparticles based on polymer-metal complexes has been performed. FT-IR spectroscopy, TGA analysis and swelling measurements of these microparticles in water showed the influence of the metal type ions on their structure, thermal stability and water swelling capacity. The FT-IR spectroscopy allows to explain the mechanism of polymer-metal complexes formation and the optical microscopy showed that the microparticles obtained had good sphericity with average diameter ranging from 719 µm to 830 µm. The thermal stability of the polymer-metal complexes was found to be higher than that of the gellan.


Keywords: gellan, poly(vinyl alcohol), metal-polymer complexes, ionotropic gelation, thermal stability, swelling in water


e-mail: msilvia@icmpp.ro


S. Vasiliu, S. Racovita, V. Neagu, M. Popa, J. Desbrieres

Polymer-metal complexes based on gellan (in English)