Please use this identifier to cite or link to this item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1043030
Research center of Embrapa/Collection: Embrapa Florestas - Artigo em periódico indexado (ALICE)
Date Issued: 2016
Type of Material: Artigo em periódico indexado (ALICE)
Authors: MATTOS, B. D.
MISSIO, A. L.
CADEMARTORI, P. H. G. de
GATTO, D. A.
MAGALHAES, W. L. E.
Additional Information: Bruno D. Mattos, Integrated program in Engineering & Materials Science (PIPE), UFPR; André L. Missio, Forestry Engineering (PPGEF), UFSM; Pedro H. G. de Cademartori, Wood and Forestry Science Center (PPGEF), UFPR; Darci A. Gatto, Professor da UFSM; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF.
Title: Color changes of wood from Pinus taeda and Schizolobium parahybum treated by in situ polymerization of methyl methacrylate using cross-linkers.
Publisher: Maderas. Ciencia y tecnología, Concepción, v. 18, n. 1, p. 113-124, ene. 2016.
Language: en
Keywords: Schizolobium parahybum
Espécie exótica
Free radical polymerization
UV-Vis
Heat catalyst
Composites (materials).
Description: The aim of this study was to evaluate the colorimetric properties of Pinus taeda and Schizolobium parahybum woods treated by in situ polymerization. The wood samples were impregnated in a vacuum/ pressure system and polymerized in an oven at 90°C for 10h, using benzoyl peroxide at 1,5wt% as the catalyst. The treatments were characterized using attenuated total reflectance infrared (ATRIR) spectroscopy and weight percentage gain (WPG). The color evaluation was performed using CIEL*a*b* concepts, specular gloss, and UV-Visible spectrophotometry. Treated woods showed increases in band intensity related to polymers (1730, 1460 and 1145 cm-1), and WPG ranged from 39 to 164%, depending of the wood species and treatments. Lightness decreased, while the Chroma, gloss and the color coordinates increased. A darkening of the all treated samples was observed, and confirmed by the decrease in the reflectance intensity between 400 and 700 nm.
Thesagro: Madeira
Tratamento
Espécie nativa
Pinus Taeda.
NAL Thesaurus: Wood treatment
Polymers.
Data Created: 2016-04-11
Appears in Collections:Artigo em periódico indexado (CNPF)

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