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- Title
Chemical Composition and Color of Short-Rotation Teak Wood Thermally Modified in Closed and Open Systems.
- Authors
Gomes, Felipe da Silva; Reis, Miquéias de Souza; Rupf, Anna Clara Oliveira; Silvares, Paulo Henrique dos Santos; Ferreira, Jessica Sabrina da Silva; Dias, Luciano da Costa; Madi, João Paulo Sardo; Cademartori, Pedro Henrique Gonzalez de; Neto, Humberto Fantuzzi; Paes, Juarez Benigno; Batista, Djeison Cesar
- Abstract
Although the effect of thermal modification (TM) on teak wood color is well documented, few studies have been carried out on closed-system processes, and it remains unclear what the effect is of different processes on the same material. This work aimed to verify the effect of closed- and open-system processes of TM on the color of short-rotation teak wood. Thermally modified wood (TMW) was evaluated in a closed system at 160 °C (CS160) and in an open system at 185 °C and 210 °C (OS185 and OS210). We measured the moisture content (initial and final) of the wood and the corrected mass loss (CML). The chemical analyses encompassed the contents of alpha-cellulose, hemicelluloses, lignin, and extractives (total, in acetone and dichloromethane). Wood color was measured before and after TM according to the CIEL*a*b* color space. It was possible to achieve the same color using different processes of thermal modification (CS160 and OS210). TM reduced wood lightness (L*), red–green chromaticity coordinate (a*), and yellow–blue chromaticity coordinate (b*). L* and a* had the biggest and smallest variations, respectively. TMW color was significantly changed, even at the mildest condition tested (OS185, 0.33% CML).
- Subjects
WOOD; COLOR space; TEAK; CHROMATICITY; COLOR
- Publication
Applied Sciences (2076-3417), 2023, Vol 13, Issue 24, p13050
- ISSN
2076-3417
- Publication type
Article
- DOI
10.3390/app132413050