Superamphiphobic overhang structured coating on a biobased material

Mikko Tuominen, Hannu Teisala, Janne Haapanen, Jyrki M. Mäkelä, Mari Honkanen, Minnamari Vippola, Stig Bardage, Magnus E P Wålinder, Agne Swerin

    Tutkimustuotos: ArtikkeliScientificvertaisarvioitu

    23 Sitaatiot (Scopus)

    Abstrakti

    A superamphiphobic coating on a biobased material shows extreme liquid repellency with static contact angles (CA) greater than 150° and roll-off angles less than 10° against water, ethylene glycol, diiodomethane and olive oil, and a CA for hexadecane greater than 130°. The coating consisting of titania nanoparticles deposited by liquid flame spray (LFS) and hydrophobized using plasma-polymerized perfluorohexane was applied to a birch hardwood. Scanning electron microscopy (SEM) imaging after sample preparation by UV laser ablation of coated areas revealed that capped structures were formed and this, together with the geometrically homogeneous wood structure, fulfilled the criteria for overhang structures to occur. The coating showed high hydrophobic durability by still being non-wetted after 500 000 water drop impacts, and this is discussed in relation to geometrical factors and wetting forces. The coating was semi-transparent with no significant coloration. A self-cleaning effect was demonstrated with both water and oil droplets. A self-cleanable, durable and highly transparent superamphiphobic coating based on a capped overhang structure has a great potential for commercial feasibility in a variety of applications, here exemplified for a biobased material.

    AlkuperäiskieliEnglanti
    Sivut135-143
    Sivumäärä9
    JulkaisuApplied Surface Science
    Vuosikerta389
    DOI - pysyväislinkit
    TilaJulkaistu - 15 jouluk. 2016
    OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

    Julkaisufoorumi-taso

    • Jufo-taso 1

    !!ASJC Scopus subject areas

    • Surfaces, Coatings and Films

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