Effect of Heat Treatment on Decay Resistance of Chinese Fir and Pine

Abstract:

To enhance decay resistance, the effect of heat treatment and the variation of chemical composition on Chinese Fir and Pine were investigated in this study — heat treatment temperature was 170°C, 190°C and 210°C, respectively, heat treatment time was 2, 3 and 4hours, respectively. Both of them were subsequently exposed to white-rot fungus and brown-rot fungus. The results showed that:(1) With the increasing of the heat treatment, decay resistance of Chinese Fir and Pine were improved, anti-corrosion of Pine after being heat treated at 190°C which were exposed to write-rot fungus can reach I, anti-corrosion of Chinese Fir after being heat treated at 170°C treated which were exposed to brown-rot fungus could reach I yet, After being heat treated at 210°C for 3 hours , the Chinese fir samples had no measurable weight loss when exposed to the write-rot fungus.(2) There was no remarkable influence on both Chinese Fir and Pine by heat treatment time.(3) The moisture content of Chinese Fir and Pine were lower than the moisture content that the rot fungus need, macromolecule chains such as cellulose and hemicellulose broke down, their contents decreased, and the hemicellulose decomposed into acetic acid, they prevented the growth of rot fungus.

• Periodical: Advanced Materials Research (Volumes 468-471)
• Pages: 1118-1122
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.468-471.1118
• Online since: February 2012
• Authors: Yan Jun Li, Lan Xing Du, Gou Ying Hu, Xing Xia Ma
• Keywords: Chemical Composition, Decay Resistance, Heat Treatment

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