Back to Search
Start Over
Comparative study of wood flour photodegradation of two wood species submitted to artificial weathering
- Source :
- Maderas: Ciencia y Tecnología, Vol 19, Iss 2, Pp 141-148 (2017), Maderas. Ciencia y tecnología, Volume: 19, Issue: 2, Pages: 141-148, Published: 2017, Maderas. Ciencia y tecnología v.19 n.2 2017, SciELO Chile, CONICYT Chile, instacron:CONICYT
- Publication Year :
- 2017
- Publisher :
- Universidad del Bío-Bío, 2017.
-
Abstract
- In this work Eucalyptus grandis and Dipteryx odorata were submitted to photodegradation by ultraviolet radiation. The effect of ultraviolet radiation irradiation on the color change and chemical composition of each wood flour were evaluated. The samples were submitted to a total of 500h of artificial weathering using condensation stages and ultraviolet radiation B irradiation cycles. The changes in wood flour color were monitored by spectrocolorimetry, while the changes in wood chemical composition were evaluated by Fourier transform infrared spectroscopy. Both species showed changes in color with increased exposure time to artificial weathering. For both wood species the variation in color change was considered very appreciable after 500h. The Eucalyptus grandis specie showed appreciable color change after 120h, while for Dipteryx odorata specie the color change is appreciable only after 240h. The Fourier transform infrared spectroscopy results showed that lignin was strongly degrades by ultraviolet radiation radiation in both species. However, Dipteryx odorata was more resistant to photodegradation than Eucalyptus grandis, probably due to lower lignin content in this wood. The results clearly indicated that for the wood species studied the rate of weathering is influenced by wood species.
- Subjects :
- Materials science
ftir
Materials Science (miscellaneous)
Manufactures
lignin
Weathering
02 engineering and technology
TS1-2301
Industrial and Manufacturing Engineering
chemistry.chemical_compound
lcsh:Manufactures
Botany
wood
Chemical Engineering (miscellaneous)
Lignin
Fourier transform infrared spectroscopy
lcsh:Forestry
Photodegradation
Chemical composition
040101 forestry
biology
Forestry
Wood flour
04 agricultural and veterinary sciences
SD1-669.5
021001 nanoscience & nanotechnology
biology.organism_classification
Eucalyptus
color change
Color change
Dipteryx
Horticulture
FTIR
chemistry
0401 agriculture, forestry, and fisheries
lcsh:SD1-669.5
photodegradation
0210 nano-technology
lcsh:TS1-2301
Subjects
Details
- Language :
- English
- ISSN :
- 07173644
- Volume :
- 19
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- Maderas: Ciencia y Tecnología
- Accession number :
- edsair.doi.dedup.....39d034559c01a69daf209313d2ac33d1