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Selected Publication:

Konnerth, J; Harper, D; Lee, SH; Rials, TG; Gindl, W.
(2008): Adhesive penetration of wood cell walls investigated by scanning thermal microscopy (SThM)
HOLZFORSCHUNG. 2008; 62(1): 91-98. FullText FullText_BOKU

Abstract:
Cross sections of wood adhesive bonds were studied by scanning thermal microscopy (SThM) with the aim of scrutinizing the distribution of adhesive in the bond line region. The distribution of thermal conductivity, as well as temperature in the bond line area, was measured on the surface by means of a nanofabricated thermal probe offering high spatial and thermal resolution. Both the thermal conductivity and the surface temperature measurements were found suitable to differentiate between materials in the bond region, i.e., adhesive, cell walls and embedding epoxy. Of the two SThM modes available, the surface temperature mode provided images with superior optical contrast. The results clearly demonstrate that the polyurethane adhesive did not cause changes of thermal properties in wood cell walls with adhesive contact. By contrast, cell walls adjacent to a phenol-resorcinol-formaldehyde adhesive showed distinctly changed thermal properties, which is attributed to the presence of adhesive in the wood cell wall.
Authors BOKU Wien:
Gindl-Altmutter Wolfgang
Konnerth Johannes
BOKU Gendermonitor:


Find related publications in this database (Keywords)
adhesive penetration
scanning thermal microscopy (SThM)
wood


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