Cellulose nanopapers as tight aqueous ultra-filtration membranes

Andreas Mautner, Koon-Yang Lee, Tekla Tammelin, Aji P. Matthew, Alisyn J. Nedoma, Kang Li, Alexander Bismarck

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    71 Citations (Scopus)

    Abstract

    Recently, we have demonstrated the use of wood-derived nanocellulose papers, herein termed nanopapers, for organic solvent nanofiltration applications. In this study, we extend the use of these nanopapers to tight ultrafiltration (UF) membranes. The feasibility of such nanopaper-based UF membranes intended for use in water purification is shown. Four types of nanocelluloses, namely bacterial cellulose, wood-derived nanocellulose, TEMPO-oxidized cellulose nanofibrils and cellulose nanocrystals, were used as raw materials for the production of these nanopaper-based membranes. The resulting nanopapers exhibit a transmembrane permeance in the range of commercially available tight UF membranes with molecular weight cut-offs ranging from 6 to 25 kDa, which depends on the type of nanocellulose used. These molecular weight cut-offs correspond to average pore sizes of a few nanometres. The rejection performance of the nanopapers is on the border of nanofiltration and UF. We demonstrate that the pore size of the nanopapers can be controlled by using different types of nanocellulose fibrils.
    Original languageEnglish
    Pages (from-to)209 - 214
    JournalReactive and Functional Polymers
    Volume86
    DOIs
    Publication statusPublished - 2015
    MoE publication typeA1 Journal article-refereed

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    Keywords

    • cellulose
    • microfiltration
    • molecular weight
    • nanofiltration
    • pore size
    • ultrafiltration
    • wood
    • nano-cellulose

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