Physical Characterization of Biodegradable Films Based on Chitosan,Polyvinyl Alcohol and <Emphasis Type="Italic">Opuntia</Emphasis> Mucilage |
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| Authors: | Blanca M Dominguez-Martinez Hector E Martínez-Flores Jose De J Berrios Caio G Otoni Delilah F Wood Gonzalo Velazquez |
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| Institution: | 1.Instituto Politécnico Nacional,CICATA-QRO,Querétaro,Mexico;2.Facultad de Químico Farmacobiología,Universidad Michoacana de San Nicolás de Hidalgo,Morelia,Mexico;3.PPG-CEM, Department of Materials Engineering,Federal University of S?o Carlos,S?o Carlos,Brazil;4.National Nanotechnology Laboratory for Agribusiness,Embrapa Instrumenta??o,S?o Carlos,Brazil;5.Healthy Processed Foods Research Unit,USDA-ARS-WRRC,Albany,USA;6.Bioproducts Research Unit,USDA-ARS-WRRC,Albany,USA |
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| Abstract: | This study aimed to develop and characterize biodegradable films containing mucilage, chitosan and polyvinyl alcohol (PVA) in different concentrations. The films were prepared by casting on glass plates using glycerol as plasticizer. Mechanical properties, water vapor and oxygen barrier, as well as the interaction with water, were measured. The compatibility of the film-forming components and the uniformity of the films were determined by zeta potential and SEM, respectively. The glycerol and mucilage allowed obtaining more hydrophilic films. The barrier properties of the films made from 100 % chitosan were similar to composed films containing PVA up to 40 %. The results of this study suggest that the interaction between chitosan and mucilage could increase water vapor permeability. The films prepared from either 100 % chitosan or PVA showed a more hydrophobic behavior as compared to the composed films. The films were homogenous since no boundary or separation of components was observed, indicating a good compatibility of the components in the films. |
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