Modified nanofibrillated cellulose-polyvinyl alcohol films with improved mechanical performance

Sanna Virtanen, Jari Vartianen, Harri Setälä, Tekla Tammelin, Sauli Vuoti

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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.

    Original languageEnglish
    Pages (from-to)11343-11350
    Number of pages8
    JournalRSC Advances
    Volume4
    Issue number22
    DOIs
    Publication statusPublished - 28 Feb 2014
    MoE publication typeA1 Journal article-refereed

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    Keywords

    • cellulose

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