RT Journal Article
T1 Characterization of bacterial cellulose films combined with chitosan and polyvinyl alcohol: Evaluation of mechanical and barrier properties
A1 Cazón Díaz, Patricia
A1 Velázquez, Gonzalo
A1 Vázquez Vázquez, Manuel
K1 Films
K1 Bacterial cellulose
K1 Water vapor permeability
K1 Chitosan
K1 Polyvinyl alcohol
K1 UV protection
AB Bacterial cellulose (BC) produced by Komagataeibacter xylinus is a biomaterial with a unique three-dimensional structure. To improve the mechanical properties and reinforce the BC films, they were immersed in polyvinyl alcohol (0–4%) and chitosan (0–1%) baths. Moisture content, mechanical properties and water vapour permeability were measured to assess the effect of polyvinyl alcohol and chitosan. The morphology, optical, structural and thermal properties were evaluated by scanning electron microscopy, spectral analysis, thermogravimetry and differential scanning calorimetry. Results showed that moisture content was significantly affected by the chitosan presence. Tensile strength values in the 20.76–41.65 MPa range were similar to those of synthetic polymer films. Percentage of elongation ranged from 2.28 to 21.82% and Young's modulus ranged from 1043.88 to 2247.82 MPa. The water vapour permeability (1.47 × 10−11–3.40 × 10−11 g/m s Pa) decreased with the addition of polyvinyl alcohol. The developed films own UV light barrier properties and optimal visual appearance.
PB Elsevier
SN 0144-8617
YR 2019
FD 2019-07-19
LK https://hdl.handle.net/10347/38513
UL https://hdl.handle.net/10347/38513
LA eng
NO Patricia Cazón, Gonzalo Velázquez, Manuel Vázquez, Characterization of bacterial cellulose films combined with chitosan and polyvinyl alcohol: Evaluation of mechanical and barrier properties, Carbohydrate Polymers, Volume 216, 2019, Pages 72-85, ISSN 0144-8617, https://doi.org/10.1016/j.carbpol.2019.03.093.
NO The financial support for this project was provided by Consellería de Cultura, Educación e Ordenación Universitaria, Xunta de Galicia (ES) (Project # ED431B 2016/009).
DS Minerva
RD 28 abr 2026