Fractionation of microfibrillated cellulose and its effects on tensile index and elongation of paper

A. Madani, J.A. Olson, Harri Kiiskinen, D.M. Martinez

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    Abstract

    In this work we examine the fractionation of microfibrillated cellulose (MFC) and its effect on the physical properties of paper. In the first part of this work, we evaluate the fractionation of commercially available MFC using multiple stages of traditional fractionation unit operations, namely a hydrocyclone, a pressure screen, and a novel technique based upon the control of the threshold for motion in a weak gel. The results indicate that a smaller fibre length average fraction could be obtained using the gel separation technique than using multiple stages of separation in both the hydrocyclone and the pressure screen. With the gel technique we were able to reduce the average fibre length of the MFC from 221 µm to 100 µm. In the second part of the work, composite paper samples were formed by addition of fractionated and non-fractionated MFC to chemical wood fibres and the strength of the resulting composites were studied. The results showed 25% improvement in tensile index by addition of MFC and an additional 10% improvement in tensile strength by addition of fractionated MFC using the gel technique
    Original languageEnglish
    Title of host publicationPaperCon 2011
    PublisherTAPPI Press
    Pages371-378
    ISBN (Print)978-161839443-9
    Publication statusPublished - 2011
    MoE publication typeA4 Article in a conference publication
    EventPaper Conference and Trade Show, PaperCon 2011 - Covington, United States
    Duration: 1 May 20114 May 2011

    Conference

    ConferencePaper Conference and Trade Show, PaperCon 2011
    Abbreviated titlePaperCon 2011
    Country/TerritoryUnited States
    CityCovington
    Period1/05/114/05/11

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