Sustainable nanocomposite films based on bacterial cellulose and pullulan |
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Authors: | Eliane Trovatti Susana C M Fernandes Laurent Rubatat Carmen S R Freire Armando J D Silvestre Carlos Pascoal Neto |
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Institution: | 1.CICECO and Department of Chemistry,University of Aveiro,Aveiro,Portugal;2.IPREM/EPCP, UMR 5254,Université de Pau et des Pays de l’Adour,Pau,France |
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Abstract: | Bionanocomposites with improved properties based on two microbial polysaccharides, pullulan and bacterial cellulose, were
prepared and characterized. The novel materials were obtained through a simple green approach by casting water-based suspensions
of pullulan and bacterial cellulose and characterized by TGA, RDX, tensile assays, SEM and AFM. The effect of the addition
of glycerol, as a plasticizer, on the properties of the materials was also evaluated. All bionanocomposites showed considerable
improvement in thermal stability and mechanical properties, compared to the unfilled pullulan films, evidenced by the significant
increase in the degradation temperature (up to 40 °C) and on both Young’s modulus and tensile strength (increments of up to
100 and 50%, for films without glycerol and up to 8,000 and 7,000% for those plasticized with glycerol). Moreover, these bionanocomposite
films are highly translucent and could be labelled as sustainable materials since they were prepared entirely from renewable
resources and could find applications in areas as organic electronics, dry food packaging and in the biomedical field. |
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