Journal
FOOD BIOSCIENCE
Volume 50, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.fbio.2022.102177
Keywords
Wood pulps; Cellulose films; Regeneration; Hot pressing; Food packaging
Categories
Funding
- Fonds de Recherche du Quebec-Nature et Technologies
- Canada Foundation for Innovation
- Mitacs Accelerate
- [2021 -PR -283095]
- [39173]
- [FR68649]
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This study demonstrates the feasibility of using cellulose films made from 'green' solvent as biodegradable packaging materials. Different wood origins do not have a significant impact on the structure of cellulose films, but hot pressing can efficiently remove moisture and improve the performance of regenerated films.
Cellulose films made from 'green' solvent provide the possibility to mitigate environmental pollution caused by non-degradable plastic packaging. Herein, regenerated cellulose films were prepared from five wood pulps in NaOH/urea aqueous solution, dried either at ambient conditions or by hot pressing, and tested as biodegradable packaging materials. The results revealed that different wood origins did not cause much difference in the structure of cellulose films. However, hot-pressing could not only efficiently remove water from wet films, but also significantly improve the tensile strength and water vapor barrier property of regenerated films. The RC-P -HP film had the tensile strength of 85.00 +/- 3.26 MPa, Young's modulus of 6.45 +/- 0.36 GPa, and water vapor permeability of 3.59 +/- 0.14 x 10- 7 gm- 1h- 1Pa- 1, and exhibited the similar capacity as the commercial plastic wrap during the preservation of cherry tomatoes for up to 16 days. Therefore, this study demonstrates a feasible strategy to fabricate wood cellulose films for biodegradable food packaging.
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