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  • Influence of ▫$O_2$▫ and ▫$CO_2$▫ plasma treatment on the deposition of chitosan onto polyethylene terephthalate PET surfaces
    Tkavc, Tina ...
    Oxygen and carbon dioxide plasma treatments were applied in order to study their influences on chitosan adhesion onto PET foils. Modification of the surface and the adsorption of chitosan were ... monitored by the determination of XPS spectra, titrations, zeta potential, contact angles, and AFM. The plasma treatment resulted in hydrophilization of the surface through the introduction of new polar oxygen-containing groups. The treatment also yielded binding-sites for amino groups of chitosan. This led to a decrease in accessible protonated amino groups after chitosan binding onto plasma-activated foils in comparison with the plasma-non activated ones. Consequently, the layer of chitosan adsorbed after plasma treatment was less antimicrobially active in the case of O2- treated foils. Surprisingly, the layer of chitosan adsorbed after CO2 plasma treatments was, in general, more active as antimicrobial agents than those of the non-plasma treated PET surfaces.
    Source: International journal of adhesion and adhesives. - ISSN 0143-7496 (Vol. 48, Jan. 2014, str. 168-176)
    Type of material - article, component part
    Publish date - 2014
    Language - english
    COBISS.SI-ID - 17239830
    DOI

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