马尾松N_2热处理材耐腐性能及化学性质的研究

Study on the decay resistance and chemical properties of heat treated masson′s pine wood with N_2

采用均匀设计法探讨氮气(N2)热处理工艺对人工林马尾松木材耐腐性能及化学性质的影响。结果表明,随处理温度升高,保温时间增加,木材耐腐性能提高;N2热处理使其纤维素含量减少0.9%,半纤维素减少6.5%。红外光谱分析(FTIR)表明,N2热处理使木材内部O—H减少。马尾松N2热处理的较佳工艺条件:处理温度220℃,保温时间4 h,升温速率15℃.min-1,此时处理材腐朽后失重率16.4%,已达到Ⅱ级(耐腐)。

Uniform design experimentation was used to conduct decay resistance and chemical properties of heat treated masson＇s pine wood in the medium of nitrogen（ N2 ）. The results showed that the decay resistance was improved with the treatment temperature increasing and heat preservation time prolonged. The cellulose decreased by 0.9% and the semi-jcellulose decreased by 6.5% after heat treated. The fourier transform infrared spectroscopy （FTIR） analysis showed that： after treated, the O--H decreased. The optimum technology of heat treatment of masson＇s pine wood with N2 as a medium is： temperature 220 ℃, heat preservation time 4 hours, temperature increasing rate 15℃·min -1, the weight-loss ratio of treated wood is 16.4% after decayed, reached the level 2 of the decay resistance.