Noncovalent surface modification of cellulose nanopapers by adsorption of polymers from aprotic solvents

Katri Kontturi, Karolina Biegaj, Andreas Mautner, Robert T. Woodward, Benjamin P. Wilson, Leena-Sisko Johansson, Koon-Yang Lee, Jerry Y.Y. Heng, Alexander Bismarck (Corresponding Author), Eero Kontturi

    Research output: Contribution to journalArticleScientificpeer-review

    26 Citations (Scopus)

    Abstract

    Basic adsorption of hydrophobic polymers from aprotic solvents was introduced as a platform technology to modify exclusively the surfaces of cellulose nanopapers. Dynamic vapor sorption demonstrated that the water vapor uptake ability of the nanopapers remained unperturbed, despite strong repellency to liquid water caused by the adsorbed hydrophobic polymer on the surface. This was enabled by the fact that the aprotic solvents used for adsorption did not swell the nanopaper unlike water that is generally applied as the adsorption medium in such systems. As case examples, the adsorptions of polystyrene (PS) and poly(trifluoroethylene) (PF3E) were followed by X-ray photoelectron spectroscopy and water contact angle measurements, backed up with morphological analysis by atomic force microscopy. The resulting nanopapers are useful in applications like moisture buffers where repellence to liquid water and ability for moisture sorption are desired qualities.
    Original languageEnglish
    Pages (from-to)5707-5712
    Number of pages6
    JournalLangmuir
    Volume33
    Issue number23
    DOIs
    Publication statusPublished - 13 Jun 2017
    MoE publication typeA1 Journal article-refereed

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