Effects of pH on lap-shear strength for aspen veneer
2013 (English)In: Wood and Fiber Science, ISSN 0735-6161, Vol. 45, no 3, 294-302 p.Article in journal (Refereed) Published
This study is one part of a whole project called "Impact of Extreme pH of Structural Adhesives on Bond Durability." The objective of this study was to evaluate effects of pH on wood-adhesive bond strength and chemical change in aspen (Populus tremuloides Michx) wood caused by extreme pH exposures. Aspen veneer lap-shear samples were tested for maximum stress (N/mm2) and wood failure (%) after exposure to soaking in different buffered solutions (pH = 2.0, 2.5, 3.0; water, 10.0, 11.0, 11.5, 12.0, and 12.5) for 1, 4, and 7 mo. One set of samples stored in laboratory conditions was also tested as a control at each test time. Results indicated that bond strength and wood failure decreased after 4- and 7-mo exposures to acidic conditions but did not change significantly under alkaline exposures. However, the buffered acidic solutions (pH = 2.0 and 3.0) did not cause a measurable chemical change in aspen wood, whereas losses in hemicellulose and lignin were found after aspen wood specimens had been exposed to pH > 11.0 buffered solutions
Place, publisher, year, edition, pages
2013. Vol. 45, no 3, 294-302 p.
Research subject Wood Products Engineering
IdentifiersURN: urn:nbn:se:ltu:diva-9400Local ID: 8041450f-ac3b-424f-b1e7-95053f32968aOAI: oai:DiVA.org:ltu-9400DiVA: diva2:982338
Validerad; 2013; 20130819 (ysko)2016-09-292016-09-29Bibliographically approved