Oxygen permeability of regenerated cellulose films with different water regains
Oxygen permeability of regenerated cellulose films with different water regains
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不同回潮率再生纤维素膜的透氧率
DOI：
10.1016/j.carbpol.2023.120849
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发表时间：
2023
影响因子：
11.2
通讯作者：
Yamane Chihiro
中科院分区：
文献类型：
--
作者：
Okugawa Akari;Yuguchi Yoshiaki;Hayakawa Daichi;Ueno Fumiya;Hatai Koji;Yamane Chihiro
研究了回潮率对再生纤维素膜透氧系数（OP）的影响。干膜的OP极低，被归类为“非常高”的气体阻隔性能;然而，OP随着回潮率的增加而增加，并且达到与低密度聚乙烯膜的OP类似的OP，被归类为“差”的气体阻隔性能。膜厚度随着回潮率的增加而增加，并且侧视小角度X射线散射揭示了在厚度方向上微晶之间的空间的加宽。氧分子可能通过纤维素分子之间的空间，这是扩大与增加回潮率。粘弹性测量表明，再生纤维素在潮湿条件下以橡胶态存在。总的来说，水分引起的纤维素主链的增宽和微布朗运动使再生纤维素的OP增加。
The effect of water regain on the oxygen permeability coefficient (OP) of regenerated cellulose film was investigated. TheOPof the dry film was extremely low, which was classified as a “very high” performance gas barrier; however, theOPincreased with increasing water regain, and reached to theOPsimilar 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, theOPof regenerated cellulose was increased because of the widening and micro-Brownian motion of cellulose main chains caused by water.