Oxygen permeability of regenerated cellulose films with different water regains

The effect of water regain on the oxygen permeability coefficient (OP) of regenerated cellulose film was investigated. The OP of the dry film was extremely low, which was classified as a “very high” performance gas barrier; however, the OP increased with increasing water regain, and reached to the O...

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Bibliographic Details
Published in:Carbohydrate polymers 2023-08, Vol.313, p.120849-120849, Article 120849
Main Authors: Okugawa, Akari, Yuguchi, Yoshiaki, Hayakawa, Daichi, Ueno, Fumiya, Hatai, Koji, Yamane, Chihiro
Format: Article
Language:English
Subjects:
Oxygen permeability
Regenerated cellulose
Small- and wide-angle X-ray diffraction
Viscoelastic behavior
Water regain
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Summary:The effect of water regain on the oxygen permeability coefficient (OP) of regenerated cellulose film was investigated. The OP of the dry film was extremely low, which was classified as a “very high” performance gas barrier; however, the OP increased with increasing water regain, and reached to the OP similar to that of low-density polyethylene film, which was categorized as a “poor” gas barrier. The film thickness increased with increasing water regain, and edge-view small-angle X-ray scattering revealed widening of the space between microcrystals in the thickness direction. Oxygen molecules likely passed through the space between cellulose molecules, which was widened with increasing water regain. The viscoelastic measurements indicated that regenerated cellulose existed in a rubbery state under wet conditions. Overall, the OP of regenerated cellulose was increased because of the widening and micro-Brownian motion of cellulose main chains caused by water. [Display omitted]
ISSN:0144-8617
1879-1344
DOI:10.1016/j.carbpol.2023.120849