Journal
BIOMACROMOLECULES
Volume 20, Issue 5, Pages 2084-2095Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.biomac.9b00317
Keywords
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Funding
- CONACYT (Mexico) [435948]
- Conselleria de Cultura, Educacion e Ordenacion Universitaria, Xunta de Galicia (ES) [ED431B 2016/009]
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The present study describes the preparation and characterization of composite films from bacterial cellulose produced by Komagataeibacter xylinus combined with poly(vinyl alcohol) and chitosan. The unique bacterial cellulose structure provides an expanded surface area with high porosity, easing the combination with other soluble polymers by dipping. This blending method effectively reinforces the bacterial cellulose structure. Toughness, puncture strength, water solubility, and swelling degree were measured to assess the effect of poly(vinyl alcohol) and chitosan on the analyzed properties. The morphology and optical and thermal properties were evaluated by scanning electron microscopy, UV-vis spectral analysis, thermogravimetry, and differential scanning calorimetry, respectively. Results showed that the films have good UV-barrier properties and high thermal stability. Toughness values ranged from 0.26 to 7.18 MJ/m(3), burst strength ranged from 58.88 to 3234.62 g, and distance to burst ranged from 0.39 to 3.24 mm. Poly(vinyl alcohol) affected the water solubility and increased the swelling degree.
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