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Non-fluorine surface modification of acetylated birch for improved water repellence
RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design. KTH Royal Institute of Technology, Sweden.ORCID iD: 0000-0002-9585-1961
RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design.ORCID iD: 0000-0002-2614-1245
RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design.
KTH Royal Institute of Technology, Sweden.
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2021 (English)In: Holzforschung, ISSN 0018-3830, E-ISSN 1437-434X, Vol. 75, no 9, p. 857-Article in journal (Refereed) Published
Abstract [en]

In this work, a non-fluorinated surface treatment, i.e., hydrophobized silicone nanofilaments, was applied on both birch and acetylated birch wood samples via a gas-phase based reaction. A superhydrophobic behavior was observed on both the surface-modified samples as revealed by the static water contact angles (CAs) greater than 160°, also valid for samples prepared with the shortest reaction time of 1 h. The dynamic wettability behavior of the samples was studied by a multicycle Wilhelmy plate method. The surface-modified acetylated birch exhibited a pronounced enhanced water resistance, resulting in very low water uptake of 3 ± 1 wt% after 100 cycles, which was not only about 29 and 5 times lower than that of the non-surface-modified birch and acetylated birch, respectively, but also three times lower than that of the surface-modified birch. Moreover, the aesthetic appearance of the acetylated wood was maintained as the surface modification only resulted in a small color change. This work shows the potential of preparing super water-repellent wood by non-fluorinated surface modification. 

Place, publisher, year, edition, pages
De Gruyter Open Ltd , 2021. Vol. 75, no 9, p. 857-
Keywords [en]
Acetylated wood, Multicycle Wilhelmy plate method, Non-fluorine surface modification, Silicone nanofilaments, Superhydrophobic coating, Fluorine, Silicones, Superhydrophobicity, Dynamic wettabilities, Fluorinated surface, Superhydrophobic behavior, Surface-modified, Surface-modified samples, Water repellence, Water repellents, Water-resistances, Surface treatment
National Category
Wood Science
Identifiers
URN: urn:nbn:se:ri:diva-53030DOI: 10.1515/hf-2020-0236Scopus ID: 2-s2.0-85104404837OAI: oai:DiVA.org:ri-53030DiVA, id: diva2:1557331
Note

 Funding details: 2016-01362; Funding details: VINNOVA, 2017-02712; Funding text 1: Research funding: Formas research council is acknowledged for funding the project “Durable water-, oil- and soil repellent wood for outdoor applications via smart surface modification”, grant no. 2016-01362. The Vinnova project 2017-02712 “Bärande utomhusträ” within the BioInnovation program is also acknowledged for supporting the project.

Available from: 2021-05-25 Created: 2021-05-25 Last updated: 2023-05-17Bibliographically approved

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Yin, HaiyanSedighi Moghaddam, MaziarSwerin, Agne

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