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Heriberto Rodríguez-Tobías,Graciela Morales,Hortensia Maldonado-Textle,Daniel Grande 한국섬유공학회 2022 Fibers and polymers Vol.23 No.10
Composite mats based on submicron biopolyester fibers, such as poly(3-hydroxyalkanoate)s, and zinc oxide(ZnO) nanoparticles have been exploited in medicine and environmental areas, as antibacterial wound dressings or filters. Generally, the resulting mats have to be subjected to UV irradiation in order to promote the formation of reactive oxygenspecies, thus activating the antimicrobial or photocatalytic effect of ZnO. Therefore, investigation related to the influence ofZnO on poly(3-hydroxyalkanoate)s photo-degradation is required. In this context, the present paper addresses the long-termphoto-degradation of nanofibrous poly(3-hydroxybutyrate) (PHB)/ZnO composites derived from two complementaryelectro-hydrodynamic techniques, namely electrospinning or electrospinning/electrospraying tandem processes. A thoroughinvestigation of the as-obtained PHB/ZnO fibrous composites implying the utilization of ATR-FTIR, SEC, and SEM analysispre- and post-aging under UV irradiation (313 nm) for a period of time of 500 h to study the effect of electro-hydrodynamictechnique utilized and the ZnO content on the UV shielding properties of PHB mats.