TY - JOUR
T1 - Characterization of bacterial cellulose films combined with chitosan and polyvinyl alcohol
T2 - Evaluation of mechanical and barrier properties
AU - Cazón, Patricia
AU - Velázquez, Gonzalo
AU - Vázquez, Manuel
N1 - Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/7/15
Y1 - 2019/7/15
N2 - 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.
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.
KW - Bacterial cellulose
KW - Chitosan
KW - Films
KW - Polyvinyl alcohol
KW - UV protection
KW - Water vapor permeability
UR - http://www.scopus.com/inward/record.url?scp=85063894553&partnerID=8YFLogxK
U2 - 10.1016/j.carbpol.2019.03.093
DO - 10.1016/j.carbpol.2019.03.093
M3 - Artículo
C2 - 31047084
AN - SCOPUS:85063894553
SN - 0144-8617
VL - 216
SP - 72
EP - 85
JO - Carbohydrate Polymers
JF - Carbohydrate Polymers
ER -