Characterization of bacterial cellulose films combined with chitosan and polyvinyl alcohol
evaluation of mechanical and barrier properties
Povzetek
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.
Ključne besede
films;bacterial cellulose;water vapor permeability;chitosan;polyvinyl alcohol;UV protection;
Podatki
| Jezik: | Angleški jezik |
|---|---|
| Leto izida: | 2019 |
| Tipologija: | 1.01 - Izvirni znanstveni članek |
| Organizacija: | UNG - Univerza v Novi Gorici |
| UDK: | 54 |
| COBISS: |
42581507
|
| ISSN: | 0144-8617 |
| Št. ogledov: | 1618 |
| Št. prenosov: | 0 |
| Ocena: | 0 (0 glasov) |
| Metapodatki: |
|
Ostali podatki
| URN: | URN:SI:UNG |
|---|---|
| Vrsta dela (COBISS): | Delo ni kategorizirano |
| Strani: | str. 72-85 |
| Zvezek: | ǂVol. ǂ216 |
| Čas izdaje: | Jul. 2019 |
| DOI: | 10.1016/j.carbpol.2019.03.093 |
| ID: | 12256785 |
Priporočena dela:
Characterization of bacterial cellulose films combined with chitosan and polyvinyl alcohol
2019,
evaluation of mechanical and barrier properties
Novel composite films from regenerated cellulose-glycerol-polyvinyl alcohol
2019,
mechanical and barrier properties
Regenerated cellulose films with chitosan and polyvinyl alcohol
2020,
effect of the moisture content on the barrier, mechanical and optical properties
Regenerated cellulose films combined with glycerol and polyvinyl alcohol
2020,
effect of moisture content on the physical properties
Bacterial cellulose films
2020,
evaluation of the water interaction