热处理对东非黑黄檀物理力学性能的影响  

Effect of thermal treatment on the physical and mechanics properties of Dalbergia melanoxylon wood

作　　者：范敏[1] 倪欧琪[1] 俞珍权[1] 张凯铭[1] 吕兆坤 

机构地区：[1]南京理工大学化工学院,江苏南京210094

出　　处：《南京林业大学学报（自然科学版）》2014年第2期31-35,共5页Journal of Nanjing Forestry University：Natural Sciences Edition

摘　　要：以甲基硅油为热处理介质对东非黑黄檀进行热处理,研究了热处理前后红木的吸水率、体积膨胀率、抗压强度和物质结构的变化。实验结果表明:热处理可显著降低红木的吸湿性及体积膨胀率,提高尺寸稳定性和抗压强度。随着热处理温度的升高,吸水率呈先下降后上升的趋势,体积膨胀率呈先降低后升高的趋势;且随着热处理时间的延长,热处理材的体积膨胀率先降低后升高。当热处理温度为160℃,热处理时间4 h时,红木的物理力学性能显著提高,吸水率降低82.0%,体积膨胀率降低92.2%,抗压强度提高44.1%。In this paper, methyl silicone oil was employed as the thermal treatment medium to commit corresponding thermal treatment for the Dalbergia melanoxylon wood. Variations of moisture absorption rate, volume swelling rate, com-pressive strength and structure of the rose wood were then studied before and after the thermal treatment. In this re-search, with the temperature of thermal increasing, the moisture absorption rate displayed a tendency of reduction first and then the value increased instead. Similarly, with the time of thermal treatment extended, the volume expansion rate enjoyed a gradual increase after some degree of reduction at first. The results indicated that thermal treatment could sig-nificantly reduce the moisture absorption and volume swelling rate, and at the same time enhance dimensional stability and compressive strength in our experiment. Upon optimization, physical and mechanics qualities of the rosewood enjoy the greatest improvements when the thermal treatment temperature was set at 160℃ for 4 hours. Besides, the compres-sive strength increased by 44.1%, the moisture absorption rate and the volume swelling rate decreased by 82？0% and 92？2%, respectively.

关 键 词：热处理 甲基硅油 吸湿性 体积膨胀率 抗压强度 东非黑黄檀 

分 类 号：S781[农业科学—木材科学与技术]