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ID: <

10670/1.xm0rzx

>

·

DOI: <

10.26226/morressier.5d5fdb29ea7c83e515cbf82d

>

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Evaluation Of The Effect Of Species And Varnish On The Quality Of Surface Finish Of Some Amazonian Woods

Abstract

The Amazon Rainforest is one of the main producers of tropical timber, covering an area of 550 million hectares. From this amount, 320 million (60%) are within the Brazilian territory. Besides, it houses about 50% of the world's biodiversity and 50% of the worldu2019s tropical timber reserve, with variability of up to 300 wood-producing species per hectare. Due to this variability, many species are still technologically unknown and consequently they are not commercially used, especially for high value-added products. Good surface finish will improve the look and durability of these products. Thus, this research evaluated the quality of surface finishes on Amazonian wood species; namely, Byrsonima crispa, Eschweilera odora, Eschweilera coriacea, Manilkara amazonica and Inga alba, harvested from the Experimental Station of Tropical Silviculture, INPA. Specimens with the dimensions 10x150x650mm were cut and prepared by planing and sanding (60-320). Alkyd, Acrylic Water Based, Nitrocellulose, Polyurethane varnishes were applied with specifications for internal use. Statistical analysis (Anova/Tuckey) was applied to evaluate the effect of species/varnish factors. The properties of the finishes were evaluated via gloss, adhesion and abrasion resistance tests (ABNT 14535:2008). The adhesion was classified as G1, with up to 5% of the detached film area, the polyurethane presented the lowest performance. The abrasion wear rate, adhesion and gloss were affected only by the varnish factor. Regarding the abrasion test, the nitrocellulose and polyurethane presented the lowest and highest performances, respectively. Therefore, it was concluded that the species factor had no effect on the properties of finishes.

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