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Issue 22, 2014
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Modified nanofibrillated cellulose–polyvinyl alcohol films with improved mechanical performance

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Abstract

In this study chemically surface-modified nanofibrillated cellulose (NFC) was used at low levels (0.5 to 3 wt%) as reinforcement in a polyvinyl alcohol (PVA) matrix. The modified NFC–PVA films prepared by a solution casting technique showed improved mechanical performance and good optical properties. NFC was allylated and further epoxidised with hydrogen peroxide. The addition of 1 wt% epoxy-NFC enhanced the modulus and strength of the pure PVA film, 474% and 224%, respectively. This composite film exhibited visible light transmittance of 83%. The results also showed that 1 wt% epoxy-NFC loading was beneficial to improve the crystallinity of PVA. SEM characterization confirmed better dispersion of modified NFC within the PVA matrix compared to unmodified NFC. The result showed the favourable effect of chemically modified NFC on the mechanical properties of PVA compared to unmodified NFC as reinforcement.

Graphical abstract: Modified nanofibrillated cellulose–polyvinyl alcohol films with improved mechanical performance

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Article information


Submitted
25 Nov 2013
Accepted
05 Feb 2014
First published
19 Feb 2014

This article is Open Access

RSC Adv., 2014,4, 11343-11350
Article type
Paper

Modified nanofibrillated cellulose–polyvinyl alcohol films with improved mechanical performance

S. Virtanen, J. Vartianen, H. Setälä, T. Tammelin and S. Vuoti, RSC Adv., 2014, 4, 11343
DOI: 10.1039/C3RA46287K

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