Tyrosinase catalysed coupling of functional molecules onto protein fibresJus, Suzana (Avtor) Kokol, Vanja (Avtor) Gübitz, Georg M. (Avtor) textile fibreswool fiberstyrosinasecaffeic acidchlorogenic acidgraftingchemical modification of fibresGrafting, using oxidative enzymes shows a high potential for wool fibres funktionalisation. In this work we attempt to graft on wool fibres with phenolic antioxidants order to introduce and improve the properties of the fibre. The approach of tyrosinase to oxidize tyrosine residues in wool proteins to quinones, which can further react with free sulfhydryl (thiol), amino or phenolic groups of different substrates was exploited to couple different phenolic antioxidants (caffeic acid and chlorogenic acid) onto the wool fibre proteins. Tyrosinase catalysed reactions were followed by different analytical methods like oxygen consumption, FT-NIR Raman and UV/VIS spectroscopy. It was proved that phenolic compounds used are strongly cross-linked on the wool fibre resulting to an improved antioxidant activity.20082012-05-31 12:01:57Neznano26145UDK: 677.31.016:66.09COBISS_ID: 12130326ISSN pri članku: 0141-0229NUK URN: URN:SI:UM:DK:KHBWG2ZPsl