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PVA/(ligno)nanocellulose biocomposite films. Effect of residual lignin content on structural, mechanical, barrier and antioxidant properties
University of Córdoba, Spain.
University of Córdoba, Spain.
University Pablo de Olavide, Spain.
University of Córdoba, Spain.
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2019 (English)In: International Journal of Biological Macromolecules, ISSN 0141-8130, E-ISSN 1879-0003, Vol. 141, p. 197-206Article in journal (Refereed) Published
Abstract [en]

Nanocelluloses with and without residual lignin were isolated from wheat straw. In addition, the effect of TEMPO-mediated oxidation on the production of lignin-containing nanocellulose was studied. The different nanocelluloses were used as reinforcing agent in Poly(vinyl alcohol) films. The morphology, crystallinity, surface microstructure, barrier properties, light transmittance, mechanical and antioxidant properties were evaluated. The translucency of films was reduced by the addition of nanocellulose, however, the ability to block UV-light increased from 10% for PVA to >50% using lignin-containing nanocellulose, and 30% for lignin-free samples. The mechanical properties increased considerably, however, for loads higher than 5% a negative trend was observed presumptively due to a clustering of nanocellulose components in PVA matrix. The barrier properties of the films were improved with the use of nanocellulose, especially at small amounts (1–3%). The antioxidant capacity of films was increased up to 10% using lignin-containing nanocellulose compared to 4.7% using PVA. © 2019 Elsevier B.V.

Place, publisher, year, edition, pages
Elsevier B.V. , 2019. Vol. 141, p. 197-206
Keywords [en]
Biocomposite films, Lignin effect, Nanocellulose
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-39937DOI: 10.1016/j.ijbiomac.2019.08.262Scopus ID: 2-s2.0-85071834076OAI: oai:DiVA.org:ri-39937DiVA, id: diva2:1352799
Note

Funding details: FPU14/02278; Funding details: Universidad de Córdoba; Funding details: Ministerio de Ciencia e Innovación, MICINN, CTQ2016-78729-R; Funding text 1: The authors are grateful to Spain's DGICyT, MICINN for funding this research within the framework of the Projects CTQ2016-78729-R and supported by the Spanish Ministry of Science and Education through the National Program FPU (Grant Number FPU14/02278 ), and also to the staff of the Central Service for Research Support (SCAI) at the University of Córdoba. Appendix A

Available from: 2019-09-19 Created: 2019-09-19 Last updated: 2019-09-19Bibliographically approved

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