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Gewählte Publikation:

Arminger, B; Jaxel, J; Bacher, M; Gindl-Altmutter, W; Hansmann, C.
(2020): On the drying behavior of natural oils used for solid wood finishing
PROG ORG COAT. 2020; 148, 105831 FullText FullText_BOKU

Drying oils provide exquisite bio-based finishes for wood products but their application is restricted by their time-consuming polymerization. Research and industrial development are impeded by a lack of scientific methods to follow the polymerization progress of oils applied on wood. We investigated the drying behavior of linseed oil, tung oil, and their 1:1 mixture both with and without the addition of a drier. Liquid samples revealed faster polymerization of the mainly conjugated and highly unsaturated tung oil than of non-conjugated linseed oil. Recurring water contact angle measurements of oil finishes applied on beech and oak wood showed clear differences in wetting. Tung oil provided hydrophobicity to all wood samples soon after its application, even when used without drier. Linseed oil required longer drying times and was more susceptible to substrate influences but ultimately reached the highest contact angles when equipped with a drier. Further, we observed a relationship between drying time and contact angle stability. As a new and straightforward tool to characterize the drying progress of applied oil-based finishes, we propose the calculation of a contact angle reduction factor, that takes into account both the initial water contact angle as well as its stability over measurement time.
Autor/innen der BOKU Wien:
Arminger Benjamin
Bacher Markus
Gindl-Altmutter Wolfgang
Hansmann Christian
Jaxel Julien
BOKU Gendermonitor:

Find related publications in this database (Keywords)
Contact angle reduction factor
Linseed oil
Tung oil
Wood protection

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