CIBICI   14215
CENTRO DE INVESTIGACION EN BIOQUIMICA CLINICA E INMUNOLOGIA
Unidad Ejecutora - UE
artículos
Título:
Surface Functionalization of Polyolefin Films Via UV-Induced Photografting of Acrylic Acid. Topographical Characterization and Ability for Binding Antifungal Agents
Autor/es:
COSTAMAGNA, V.; WUNDERLIN, D. A.; LARRAÑAGA, M.; MONDRAGÓN, I.; STRUMIA, M.
Revista:
JOURNAL OF APPLIED POLYMER SCIENCE
Editorial:
Wiley Interscience
Referencias:
Año: 2006 vol. 102 p. 2254 - 2263
ISSN:
0021-8995
Resumen:
Photo-induced graft copolymerization of acrylic acid (AA) using UV radiation onto films of poly (vinyl chloride) (PVC), polypropylene (PP) and polyethylene (PE) was studied. Benzophenone was used as initiator for most of the experiments performed. The percentage of grafting was determined by gravimetric measurements, and the characterization of the grafted films was carried out by chemical analysis (FT-IR spectroscopy, volumetric titration and dye adsorption). In all samples, the grafted yield was found to increase with ultraviolet exposure time. High levels of grafting can be obtained at room temperature. In addition, optical (OM) and atomic force microscopy (AFM) allowed to follow up on the topography of the modified films as a function of reaction time. The pendant functional groups grafted were then used to bind antifungal agents, such as natamycin and crystal violet, and the antifungal properties of films were demonstrated.