20.500.12556/RUNG-6026
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.
Films
Bacterial cellulose
Water vapor permeability
Chitosan
Polyvinyl alcohol
UV protection
true
true
false
Angleški jezik
Ni določen
Delo ni kategorizirano
2020-12-14 08:39:08
2020-12-14 09:23:10
2023-06-13 14:24:13
0000-00-00 00:00:00
2019
0
0
72-85
216
1
2019
0000-00-00
NiDoloceno
NiDoloceno
NiDoloceno
0000-00-00
0000-00-00
0000-00-00
42581507
10.1016/J.CARBPOL.2019.03.093
URN:SI:UNG:REP:16KTMHHX
Univerza v Novi Gorici
0
1
0