Preparation of flexible and UV-blocking films from lignin-containing cellulose incorporated with tea polyphenol/citric acid.

Huijuan Shao, Yongjian Zhang, Hui Pan, Yongze Jiang, Jinqiu Qi, Hui Xiao, Shaobo Zhang, Tiantian Lin, Lihua Tu, Jiulong Xie

International journal of biological macromolecules 2022 May 15

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Lignin-containing bamboo cellulose, fractionated from a pilot-scale microwave liquefaction of bamboo was dissolved in tetrabutylammonium acetate/dimethyl sulfoxide (TBAA/DMSO) for the fabrication of highly flexible, transparent and UV-blocking films. Tea polyphenol (TP) or citric acid (CA) was added during the dissolving process in order to modify the film's properties. The results showed that the addition of TP obviously improved the elongation at break (triple that of the control) and UV-blocking ability of the films. Both the addition of TP and CA could increase the water contact angle of the films. The films incorporated with TP and CA were much more thermal stable than previously reported similar films. The proposed film fabrication mechanism revealed that stable hydrogen bonds formed between the lignin-cellulose matrix and TP/CA, resulting in the enhancement on the properties of the films. This present study showed that lignin-containing cellulose with the incorporation of TP/CA had great potential in the preparation of films in place of plastic. Copyright © 2022 Elsevier B.V. All rights reserved.

Citation

Huijuan Shao, Yongjian Zhang, Hui Pan, Yongze Jiang, Jinqiu Qi, Hui Xiao, Shaobo Zhang, Tiantian Lin, Lihua Tu, Jiulong Xie. Preparation of flexible and UV-blocking films from lignin-containing cellulose incorporated with tea polyphenol/citric acid. International journal of biological macromolecules. 2022 May 15;207:917-926