期刊
FORESTS
卷 12, 期 6, 页码 -出版社
MDPI
DOI: 10.3390/f12060730
关键词
wood modification; mechanical properties; physical properties; anti shrinkage efficiency; colour; Cameroon
类别
资金
- Italian Ministry for education, University and Research (MIUR)
The study found that high-temperature treatment of ayous wood can improve its adaptability to environmental moisture changes, but may reduce some of its physical and mechanical characteristics. This includes a decrease in compression strength, static bending, Brinell hardness, while enhancing the dimensional stability of the wood.
High-temperature treatment of wood is a useful method for improving certain physical characteristics, ensuring durability without biocides, and improving the performance of wood when exposed to degradation agents. This work aims to determine the effects induced by a heat treatment performed industrially on ayous wood (Triplochiton scleroxylon K. Schum) from Cameroon, through the study of the main physical and mechanical characteristics. The heat treatment at 215 degrees C for three hours with a slight initial vacuum determined a reduction of the mechanical characteristics (compression strength 26%, static bending 46%, Brinell hardness 32%) and some physical properties (dry density 11%, basic density 9%), while it improved the behaviour towards variations of environment moisture. The anti-shrinkage efficiency was 58.41 +/- 5.86%, confirming the increase of the dimensional stability. The darkening (Delta E 34.76), clearly detectable (L* 39.69 +/- 1.13; a* 10.59 +/- 081; b* 18.73 +/- 1.51), was supported almost equally by both the lightness parameter (L*) and the a* chromatic parameter. The data collected during the laboratory tests were then subjected to statistical analysis to verify correlations between the characteristics examined. Statistical differences were highlighted between each physical and mechanical properties of ayous wood modified or not.
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