Publicación:
Laccase-mediated grafting of polyphenols onto cationized cotton fibers to impart UV protection and antioxidant activities

No hay miniatura disponible
Fecha
2017-10-05
Autores
Kim, Suyeon
Lee, Hyunkyung
Kim, Juhea
Oliveira, Fernando
Souto, Pedro
Kim, Hyerim
Nakamatsu, Javier
Título de la revista
Revista ISSN
Título del volumen
Editor
Wiley
Proyectos de investigación
Unidades organizativas
Número de la revista
Abstracto
Enzyme-mediated in situ functionalization of cotton fibers was studied using laccase. Caffeic acid and morin were used as reactive phenolic substrates for laccase and further employed to the modification of fiber surfaces. Laccase-mediated oxidation and polymerization reactions of caffeic acid were monitored by ultraviolet–visible spectroscopy. During the wetting process, initial cationization of fiber surfaces using poly(diallyldimethylammonium chloride) followed by enzymatic treatment with phenolic substrates resulted ineffective polymer grafting evidenced by high color stability. Changes of fiber surface properties by polymer grafting, such as morphology and hydrophilicity/hydrophobicity, were tested using scanning electron microscopy and gravimetric absorption tests. An acceptable level of color resistance to washing stress was obtained on caffeic acid treated samples, and a high level of rubbing resistance was obtained on samples treated with both caffeic acid and morin. Regarding the ultraviolet protection test, the cationized and enzymatically functionalized samples showed a very good protection grade (ultraviolet protection factor 5 25). Finally, the antioxidant activity test of the modified fibers presented an improvement for radical scavenging potential due to the phenolic compounds incorporated to cotton fibers by laccase-mediated catalysis.
Descripción
Palabras clave
Textiles, Aplicaciones, Catalizadores, Revestimientos, Polielectrolitos
Citación