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Effects of Extraction on Wettability and Gluability of Apitong (Dipterocarpus Grandiflorus Blanco) |
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| Authors: | Nguyen Tinh F S Pollisco R C Casilla |
| Affiliation: | a Department of Wood Science and Technology, College of Forestry, University of the Philippines, at Los Banos, Laguna, The Philippines |
| Abstract: | An investigation was made of the effects of extraction and various chemicals applied on veneer surface on the wettability and gluing properties of apitong, Dipterocarpus grandiflorus Blanco, using urea formaldehyde resin. Wettability was determined by measuring contact angles with distilled water.
It was found that extraction with methanol-benzene greatly improved the wettability and gluability of apitong veneer. Likewise, surface treatment with methanol-benzene significantly increased the wettability of the veneer as well as the dry and wet shear strengths of the resulting bond. Treatment with sodium hydroxide increased both wettability and dry shear, but decreased the wet shear strength of the bond. Acetone did not have a significant effect on both wettability and dry shear, but decreased wet shear strength. On the other hand, ether had adverse effects on the wettability and gluability of apitong veneer. A positive linear correlation was found between wettability and gluability of apitong veneer. |
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