Bonding quality of two lesser-used wood species Brachystegia spiciformis and Julbernardia globiflora from Mozambique
| Autor: | Márcio Pereira da Rocha, Setsuo Iwakiri, Andrade Egas, Alberto António Manhiça, Rosilani Trianoski, Narciso Fernando Bila |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Materials Science (miscellaneous) wood bonding Manufactures Emulsion polymerization TS1-2301 Industrial and Manufacturing Engineering bonding quality chemistry.chemical_compound Brachystegia spiciformis Chemical Engineering (miscellaneous) Lignin Composite material edge glued panel polyvinyl acetate Polyvinyl acetate biology technology industry and agriculture Forestry Medium density SD1-669.5 biology.organism_classification Bonding quality Isocyanate Julbernardia globiflora chemistry value-added products Adhesive emulsion polymeric isocyanate |
| Zdroj: | Maderas. Ciencia y tecnología v.23 2021 SciELO Chile CONICYT Chile instacron:CONICYT Maderas: Ciencia y Tecnología, Vol 23, Pp 1-12 (2021) |
| ISSN: | 0718-221X |
| DOI: | 10.4067/s0718-221x2021000100441 |
| Popis: | The objective of this study was to evaluate the density, chemical properties and bonding quality of two lesser-used Mozambican wood species known as messassas (Brachystegia spiciformis and Julbernardia globiflora) aiming at edge-glued panel production. The bonding was performed using structural adhesive polyvinyl acetate D4, semi-structural adhesive emulsion polymer isocyanate and non-structural polyvinyl acetate D3 applied at 120·m-2 and 180·m-2 weights. Density, chemistry, edge shear bonding, wood failure percentage and the finger-joint tests were performed in accordance with ISO 13061-2:2014 (E), TAPPI, EN 13354:2008, ABNT-NBR ISO 12466-1:2006 and ASTM 5572:2005 standards, respectively. The results showed that both species have medium density, high extractives and lignin contents typical of tropical wood. The emulsion polymer isocyanate adhesive was approved with better performance compared to polyvinyl acetate D3 and D4 adhesives. It can also be affirmed that Brachystegia spiciformis and Julbernardia globiflora have similar bonding behaviour and the potential for producing edge glued panel panels, especially for indoor use. |
| Databáze: | OpenAIRE |
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