Switchable water absorption of paper via liquid flame spray nanoparticle coating

Hannu Teisala, Mikko Tuominen, Janne Haapanen, Mikko Aromaa, Milena Stepien, Jyrki M. Mäkelä, Jarkko J. Saarinen, Martti Toivakka, Jurkka Kuusipalo

    Research output: Contribution to journalArticleScientificpeer-review

    5 Citations (Scopus)


    Surface wetting/anti-wetting and liquid absorption are relevant properties of many porous solids including paper and other cellulose-based materials. Here we demonstrate how surface wetting by water and water absorption of commercially available kraft paper can be altered by thin nanoparticle coatings fabricated by liquid flame spray in facile and continuous one-step process. Surface wettability and absorption properties of paper increased with silica and decreased with titania (TiO2) nanoparticle coatings. Moreover, the water-repellent (superhydrophobic) TiO2 nanoparticle coated paper could be switched to superhydrophilic and water absorbing by ultraviolet illumination. The experiments revealed that although surface wetting and liquid absorption of nanoparticle coated paper are strongly related to each other, they are two distinct phenomena which do not necessarily correlate. We propose wetting regimes on the nanoparticle coated paper samples on the basis of the experimental observations.

    Translated title of the contributionSwitchable water absorption of paper via liquid flame spray nanoparticle coating
    Original languageEnglish
    Pages (from-to)2033-2043
    Number of pages11
    Issue number3
    Publication statusPublished - Jun 2014
    Publication typeA1 Journal article-refereed

    Publication forum classification

    • Publication forum level 2


    Dive into the research topics of 'Switchable water absorption of paper via liquid flame spray nanoparticle coating'. Together they form a unique fingerprint.

    Cite this