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Effect of Natural Aging on Oak Wood Fire Resistance
- Source :
- Polymers, Polymers, Vol 13, Iss 2059, p 2059 (2021), Volume 13, Issue 13
- Publication Year :
- 2021
- Publisher :
- MDPI, 2021.
-
Abstract
- The paper deals with the assessment of the age of oak wood (0, 10, 40, 80 and 120 years) on its fire resistance. Chemical composition of wood (extractives, cellulose, holocellulose, lignin) was determined by wet chemistry methods and elementary analysis was performed according to ISO standards. From the fire-technical properties, the flame ignition and the spontaneous ignition temperature (including calculated activation energy) and mass burning rate were evaluated. The lignin content does not change, the content of extractives and cellulose is higher and the content of holocellulose decreases with the higher age of wood. The elementary analysis shows the lowest proportion content of nitrogen, sulfur, phosphor and the highest content of carbon in the oldest wood. Values of flame ignition and spontaneous ignition temperature for individual samples were very similar. The activation energy ranged from 42.4 kJ·mol−1 (120-year-old) to 50.7 kJ·mol−1 (40-year-old), and the burning rate varied from 0.2992%·s−1 (80-year-old) to 0.4965%·s−1 (10-year-old). The difference among the values of spontaneous ignition activation energy is clear evidence of higher resistance to initiation of older wood (40- and 80-year-old) in comparison with the younger oak wood (0- and 10-year-old). The oldest sample is the least thermally resistant due to the different chemical composition compared to the younger wood.
- Subjects :
- 0106 biological sciences
Polymers and Plastics
Organic chemistry
chemistry.chemical_element
02 engineering and technology
01 natural sciences
Article
spontaneous ignition temperature
law.invention
chemistry.chemical_compound
QD241-441
law
010608 biotechnology
Lignin
chemical composition
Cellulose
Chemical composition
Spontaneous combustion
flame ignition temperature
General Chemistry
021001 nanoscience & nanotechnology
Pulp and paper industry
Nitrogen
Ignition system
mass burning rate
chemistry
activation energy
historical wood
0210 nano-technology
oak wood
Carbon
Wet chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 20734360
- Volume :
- 13
- Issue :
- 13
- Database :
- OpenAIRE
- Journal :
- Polymers
- Accession number :
- edsair.doi.dedup.....808719d07a5de93fb9c34cf8cb0e2f30