Influence of milling and sanding on wetting and on thermo-dynamical characteristics of spruce wood surface
Journal Title: Annals of WULS, Forestry and Wood Technology; Zeszyty naukowe SGGW - Year 2017, Vol 98, Issue
Abstract
Influence of milling and sanding on wetting and on thermo-dynamical characteristics of spruce wood surface. The aim of this paper was to investigate the influence of spruce wood mechanical treatment on wood surface wetting with standard apolar and polar-apolar liquids. Experimentally measured contact angles formed by drops situated on different treated spruce wood surfaces were used for calculation of wood surface free energy together with its disperse and polar components. The experimental results show that the diverse mechanical treatments of spruce wood surface differed in their impact on the wetting process and surface free energy of spruce wood. The milled surfaces displayed worse wetting compared to the sanded ones. This was reflected in higher contact angle values. The determined surface free energy values of spruce wood were higher for sanded surfaces, with notably higher polar component. In case of milled surfaces, their surface energy was lower, with equilibrated disperse and polar components. These results show that each of the surface treatments tested meets requirements for ensuring appropriate surface treatment quality. More suitable, however, from this viewpoint was the wood surface treated by sanding.
Authors and Affiliations
JOZEF KÚDELA, LEOŃ MRENICA, ĽUBOMÍR JAVOREK
Keywords
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