University of Oulu

Panpan Li, Juho Antti Sirviö, Antti Haapala, Alexey Khakalo, Henrikki Liimatainen, Anti-oxidative and UV-absorbing biohybrid film of cellulose nanofibrils and tannin extract, Food Hydrocolloids, Volume 92, 2019, Pages 208-217, ISSN 0268-005X,

Anti-oxidative and UV-absorbing biohybrid film of cellulose nanofibrils and tannin extract

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Author: Li, Panpan1; Sirviö, Juho Antti1; Haapala, Antti2;
Organizations: 1Fibre and Particle Engineering Research Unit, University of Oulu, P. O. Box 4300, FI-90014, Oulu, Finland
2Wood Materials Science, University of Eastern Finland, P. O. Box 111, FI-80101, Joensuu, Finland
3VTT Technical Research Centre of Finland, P.O. Box 1000, FI-02044, VTT, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 5.7 MB)
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Language: English
Published: Elsevier, 2019
Publish Date: 2020-02-04


Cellulose and tannin are both abundant and biodegradable natural polymers. This study proposes a strategy to construct biohybrid films combining the characteristics of cationic cellulose nanofibrils (CCNFs) and tannin extract for film applications. Multi-functional biohybrid films with anti-oxidative and UV-adsorbing characteristics were successfully fabricated from CCNF and tannin mixtures with different mass ratios. The results indicated that pure CCNF could be endowed with multi-functionality by a small amount of introduced flavonoid-rich tannin extract. By adding 5% (w/w) of extract, CCNF-tannin film achieved good anti-oxidant and UV-shielding ability, and simultaneously obtained ca. 15% improved thermal stability and tensile strength of up to 160 ± 9 MPa. In addition, tannin extract was able to enhance the optical clarity of CCNF film with tailorable appearances. The biohybrid films essentially consisted of renewable materials, and they can potentially be exploited in sustainable applications such as biocomposites and packaging materials.

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Series: Food hydrocolloids
ISSN: 0268-005X
ISSN-E: 1873-7137
ISSN-L: 0268-005X
Volume: 92
Pages: 208 - 217
DOI: 10.1016/j.foodhyd.2019.02.002
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
221 Nanotechnology
Copyright information: © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license