High temperature and chemical effects on wood stability

✍ Scribed by W. E. Hillis

• Publisher: Springer
• Year: 1984
• Tongue: English
• Weight: 818 KB
• Volume: 18
• Category: Article
• ISSN: 0043-7719
• DOI: 10.1007/bf00353364

✦ Synopsis

The increasing supplies of fast-grown woods grown on short rotations contain significantly higher proportions of juvenile wood with properties different from those of mature wood. Improved processes will be required to produce dried wood that is satisfactorily stable with few distortional or dimensional changes. The basic wood features affecting different forms of instability are considered. Variations in the amounts of cellulose, hemicelluloses and lignins in wood, the changes in them and the degradation products formed under different conditions are discussed. Changes in the nature of hemicelluloses appear to play an important role in conveying stability. The different volumes of heartwood in green timber have an effect on moisture levels and other properties. As industry is increasing kiln temperatures for high-temperature drying, the effect of time-temperature-moisture relationships on stability and degradation are discussed. The effect of ammonia and other chemicals on stability is considered.