Characterization of bacterial cellulose films combined with chitosan and polyvinyl alcohol: Evaluation of mechanical and barrier properties
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 perme- ability 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.
2019
2020-12-14 08:39:08
1033
Films, Bacterial cellulose, Water vapor permeability, Chitosan, Polyvinyl alcohol, UV protection
r6
Patricia
Cazón
70
Gonzalo
Velazquez
70
Manuel
Vazquez
70
COBISS_ID
3
42581507
DOI
15
10.1016/J.CARBPOL.2019.03.093
NUK URN
18
URN:SI:UNG:REP:16KTMHHX
BC_CHI_PVOH_PREPRINT.pdf
1866744
Predstavitvena datoteka
2020-12-14 09:05:12
RAZ_Cazon_Patricia_i2019.pdf
4240291
Predstavitvena datoteka
2020-12-14 09:35:24
0
Izvorni URL
2020-12-14 08:45:22