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  • Hydrophobization of polymer polystyrene in fluorine plasma = Hidrofobizacija polimera polistiren s fluorovo plazmo
    Vesel, Alenka
    Modification of surface properties of polymers by plasma fluorination was studied by X-ray Photoelectron Spectroscopy (XPS). Samples of polystyrene (PS) were exposed to weakly ionized reactive ... gaseous plasma created in tetrafluormethane (CF4) gas. Reactive plasma particles rapidly interacted with the samples forming a surface film rich with CFx functional groups. The appearance of these groups was monitored by high-resolution XPS, while the resultant modification of surface properties was monitored by water drop contact angle technique. Survey XPS spectra showed a substantial concentration of over mole fraction 50 % of fluorine, while high resolution C1s spectra revealed the appearance of different functional groups. The CF2 group was predominant as approximately a third of carbon atoms was found in this group. The contact angle measurement revealed simultaneous modification of the surface free energy from moderately hydrophobic original material to highly hydrophobic state, as the water contact angle increased from original 85° to 111°. Plasma fluorination is therefore a suitable method for improving of surface properties of polymers for biomedical applications.
    Vir: Materiali in tehnologije = Materials and technology. - ISSN 1580-2949 (Letn. 45, št. 3, maj-jun. 2011, str. 217-220)
    Vrsta gradiva - članek, sestavni del
    Leto - 2011
    Jezik - angleški
    COBISS.SI-ID - 858794

    Povezava(-e):

    Digitalna knjižnica Slovenije - dLib.si

vir: Materiali in tehnologije = Materials and technology. - ISSN 1580-2949 (Letn. 45, št. 3, maj-jun. 2011, str. 217-220)

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