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Design and synthesis of transparent and flexible nanofibrillated cellulose films to replace petroleum-based polymers

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Lassoued, Mariem et Crispino, Frank et Loranger, Eric (2020). Design and synthesis of transparent and flexible nanofibrillated cellulose films to replace petroleum-based polymers. Carbohydrate Polymers, 254 . p. 117411. ISSN 0144-8617 DOI 10.1016/j.carbpol.2020.117411

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Résumé

Nanofibrillated cellulose films have garnered attention due to their interesting proprieties such as transparency and high mechanical strength. However, they are brittle, very hydrophilic, which is decreasing their potential applications. We have successfully achieved a simple and effective chemical modification based on polymer grafting and through plasticizer additions to increase the performance of the films as well as to improve the compatibility within conventional polymer. A preliminary study shows the possibility of using this film as an interlayer in safety glazing and/or bulletproof glass with polyvinyl butyral (PVB). The modified NFC films displays high optical transmittance (93%), increases tensile stretch and is more hydrophobic (83°). A higher flexibility was also achieved, as the film was greatly stretched and bended without cracking or breaking. The NFC / PVB composite has three times more elongation at break, 13% more specific energy absorbed with a half-tensile stress compared to an interlayer of PVB.

Type de document: Article
Mots-clés libres: nanofibrillated cellulose films chemical modification high optical transmittance higher flexibility safety glazing bulletproof glass
Date de dépôt: 19 janv. 2021 16:45
Dernière modification: 19 janv. 2021 16:53
Version du document déposé: Post-print (version corrigée et acceptée)
URI: http://depot-e.uqtr.ca/id/eprint/9401

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