Abstract：Wood preservative treatment can improve defects of plantation wood such as easy to corrupt and moth eaten. Among them heat-treatment is not only environmental and no pollution, also can improve the corrosion resistance and dimension stability of wood. In this test Poplar and Mongolian Seoteh Pine was treated by soybean oil as heat-conducting medium, and the heat treatment wood was studied for indoor decay resistance; wood chemical components before and after treatment, the effect of heat treatment on wood decay resistance performance and main mechanism of action were analysed by Fourier infrared spectrometric. Results showed that the mass loss rate of poplar fell from 19.37% to 5% and Mongolian Seoteh Pine’s fell from 8.23% to 3.15%, so oil heat treatment can effectively improve the decay resistance. Infrared spectrum analysis shows that the heat treatment made wood’s hydrophilic groups such as hydroxyl groups in largely reduced, absorbing capacity decreased and the moisture of wood rotting fungi necessary was reduced; during the heat treatment wood chemical components such as cellulose, hemicellulose were degraded, and the nutrient source of wood rotting fungi growth necessary was reduced. Wood decay fungi can grow in the wood to discredit wood is because of that wood can provide better living conditions for wood decay fungi, such as nutrients, water, oxygen, and so on. The cellulose and hemicellulose in wood is the main nutrition source of wood decay fungi. So the oil heat-treatment can reduce the cellulose, hemicellulose nutrition source of wood decay fungi so as to improve the decay resistance of wood.
[1] Rapp AO(Ed). Review on Heat Treatments of Wood. Proceedings of Special Seminar Held in Antibes. France, 2001. [2] ZHOU Yong-dong, JIANG Xiao-mei(周永东, 姜笑梅). China Wood Industry(木材工业), 2006, 20(5): 2. [3] Hanger J, Huber H, Lackner R, et al. Holzforschung and Holzverwertung, 2002, 54(5): 92. [4] Doi S，Hanata K, Kamonji E. Decay and Termite Durability of Heat-Treated Wood. The 35th Annual Meeting of International Research Group on Wood Preservation. Ljubljana，Slovenia，2004. Document No: IRG/WP04-40272. [5] Brisehke C, Rapp A O. Investigation of the Suitability of Silver fir for Thermal Modification. The 35th Annual Meeting of International Research Group on Wood Preservation. Ljubljana，Slovenia，2004. Document No:IRG/WP04-40275. [6] Hakkou Mohammed, Petrissans Mathie, Gerardin Philippe, et al. Polymer Degradation and Stability, 2006，91(2): 393. [7] CHENG Da-li, JIANG Shen-xue, ZHANG Qi-sheng(程大莉, 蒋身学, 张齐生). China Wood Industry (木材工业), 2008, 6: 12. [8] LI Xian-jun, FU Feng, CAI Zhi-yong, et al(李贤军, 傅 峰, 蔡智勇，等). Journal of Central South University of Forestry & Technology(中南林业科技大学学报), 2010, 06: 95. [9] LIU Xing-yu, HUANG Rong-feng, Lü Jian-xiong(刘星雨, 黄荣凤, 吕建雄). China Wood Industry(木材工业), 2011, 01: 16.
