Surface modification of nanocellulose membranes using thermoresponsive poly(N-isopropylacrylamide)

Minna Hakalahti, Tuomas Hänninen, Harri Setälä, Zohep Karim, Aji P. Mathew, Andreas Mautner, Alexander Bismarck, Tekla Tammelin

    Research output: Contribution to conferenceConference AbstractScientific


    Cellulose nanofibers (CNF) can be regarded as biodegradable and biobased alternatives for synthetic membrane materials. Carboxylic acid groups containing TEMPO oxidized CNF is highly anionic and can be used e.g. for scavenging of contaminants, such as cationic metal ions from waste water. Water stable membranes were prepared from TEMPO oxidized CNF with an addition of 10 w-% of poly(vinyl alcohol) (PVA). The water permeability of the membrane is in the reverse osmosis membrane region. Furthermore, a surface modification route in order to attach a thermoresponsive poly(N-isopropylacrylamide) group directly on nanocellulosic (TEMPO-PVA materials and unmodified CNF based materials) membrane surfaces was developed. Effects of surface modification on the membranes structure and properties were evaluated.
    Original languageEnglish
    Publication statusPublished - 2014
    Event4th Dissemination workshop of the Nano4water cluster: Nanoenabled systems and membranes for water treatment - Stockholm, Sweden
    Duration: 23 Apr 201424 Apr 2014
    Conference number: 4


    Workshop4th Dissemination workshop of the Nano4water cluster


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