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%。
Abstract
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, compressive strength and structure of the rose wood were then studied before and after the thermal treatment. In this research, 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 significantly 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 compressive strength increased by 44.1%, the moisture absorption rate and the volume swelling rate decreased by 82.0% and 92.2%, respectively.
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参考文献
[1] Kollmann F, Schneider A. On the sorption behavior of heat stabilized wood[J].Holz als Roh-und Werkstoff, 1963, 21(3):77-85.
[2] Burmester A. Effect of heat-pressure-treatments of semi-dry wood on its dimensional stability[J].Holz als Roh-und Werkstoff, 1973, 31: 237-243.
[3] Giebeler E. Dimensional stabilization of wood by moisture-heat-pressure treatment[J].Holz als Roh-und Werkstoff, 1983, 41:87-94.
[4] Janasa S, Ahola P, Viitaniemi P. Long-term natural weathering of coated Thermo wood[J].Pigment & Resin Technology,2000,29(2):68-74.
[5] Wang J Y, Cooper P A. Effect of oil type, temperature and time on moisture properties of hot oil-treated wood[J].Holz als Roh-und Werkstoff, 2005, 63:417-422.
[6] 杨家驹,卢鸿俊.红木家具及实木地板[M].北京:中国建材工业出版社,2004.
[7] Rapp A O, Sailer M. Oil heat treatment of wood in Germany state of the art[C]// Rapp A O. Review on Heat Treatments of Wood. Proceeding of the Special Seminar on Heat Treatment. Antibes: Office for Official Publications of the European Communities, 2001.
[8] Tjeerdsma B F, Militz H. Chemical changes in hydrothermal treated wood: FTIR analysis of combined hydrothermal and dry heattreated wood[J].HolzRoh-tmdWerkstoff, 2005, 63(2):102-111.
[9] 吴帅,于志明.木材炭化技术的发展趋势[J].中国人造板,2008(5):3-6.
Wu S, Yu Z M. Review on current situation and developing trend of wood carbonization technology[J].China Wood-Based Panels, 2008(5):3-6.
[10] 冯德君,赵泾峰.热处理木材吸湿性及尺寸稳定性研究[J]. 西北林学院学报,2011,26(2):200-202.
Feng D J, Zhao J F. Heat treatment of wood hygroscopicity and dimensional stability[J]. Journal of Northwest Forestry University, 2011, 26(2):200-202.
[11] 李惠明,陈人望,严婷.热处理改性木材的性能分析I:热处理材物理力学性能[J].木材工业,2009,23(2):43-45.
Li H M, Chen R W,Yan T. Physical and mechanical properties of heat-treated lumber I[J].China Wood Indurstry, 2009, 23(2):43-45.
[12] 李坚,陆文达,刘一星,等.木材科学[M].哈尔滨:东北林业大学出版社,1994.
[13] 刘培义,孟国忠.木材的尺寸稳定性处理[J].木材工业,2003,17(2):42-45.
Liu P Y, Meng G Z. Treatment for wood dimensional stability[J]. China Wood Indurstry, 2003, 17(2):42-45.
[14] 马世春.汽蒸处理改善木材尺寸稳定性初探[J].木材工业,1998,12(5):36-39.
Ma S C.Study on improving dimensional stability of wood after saturated steam treatment[J]. China Wood Indurstry, 1998, 12(5):36-39.
[15] 李贤军,刘元,高建民,等. 高温热处理木材的FTIR 和XRD分析[J]. 北京林业大学学报,2009,31(S1):104-107.
Li X J, Liu Y, Gao J M, et al. Characteristics of FTIR and XRD for wood with high-temperature heating treatment[J]. Journal of Beijing Forestry University, 2009, 31(S1):104-107.
基金
收稿日期:2013-03-04 修回日期:2013-09-03
第一作者:范敏,硕士生。*通信作者:倪欧琪,研究员。E-mail: niouqimmm@163.com。
引文格式:范敏,倪欧琪,俞珍权,等. 热处理对东非黑黄檀物理力学性能的影响[J]. 南京林业大学学报:自然科学版,2014,38(2):31-35.
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