热带作物学报2011，Vol.32Issue(3)：533-539,7.DOI:10.3969/j.issn.1000-2561.2011.03.034
处理温度对高温热改性橡胶木物理力学性能的影响
Effects of Treatment Temperature on the Physical and Mechanical Rroperties of Thermal Modified Rubber Wood
摘要
Abstract
The effects of temperature on physical and mechanical properties of rubber wood beat-treated in superheated steam were investigated in this paper. Specimens which cut from planted forest were thermally modified at 170, 185, 200℃ and 215 ℃ for 3 hours. The results indicated that the specimens' equilibrium moisture content of wood decreased significantly from 34.33％ to 62.97％ with the increasing temperature. The changes of oven-dry density and air-dry density were not significant except for 215 ℃. Significant decreases of 3.1％～51.75％(tangential) and 2.72％～48.57％(radial) were observed in Shrinkage properties, and the decrease in swelling properties ranged from 37.80％～69.85％ (tangential) and 28.04％ ～68.57％ (radial), whereas the water adsorption diminished slightly. These changes were beneficial to the increase of dimensional stability. Moreover, a significant loss of 9.26％ to 37.52％ happened in modulus of rupture, but increase tendency of modulus of elasticity were also observed except for one trail which specimens were thermally modified at 185 ℃. Meanwhile,the hardness presented the tendency of decrease, but the compressive strength showed increase tendency in all.关键词
高温热改性/橡胶木/物理性能/力学性能Key words
High-temperature thermal modification/ Rubber wood/ Physical properties/ Mechanical properties分类
农业科技引用本文复制引用
秦韶山,李民,李晓文,李家宁,林位夫,谢贵水..处理温度对高温热改性橡胶木物理力学性能的影响[J].热带作物学报,2011,32(3):533-539,7.基金项目
海南省重点科技计划项目(No.ZDXM20100019) （No.ZDXM20100019）
海南省自然科学基金项目(No.809033) （No.809033）
中央级公益性科研院所基本科研业务专项资金项目(No.XJSYWFZX2009-10). （No.XJSYWFZX2009-10）
