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.