• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Pro Ligno >HYGROSCOPICITY OF THERMALLY MODIFIED POPLAR (POPULUS SPP.) WOOD
【24h】

HYGROSCOPICITY OF THERMALLY MODIFIED POPLAR (POPULUS SPP.) WOOD

机译：热改性杨木（POPULUS SPP。）木材的吸湿性

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Boards of poplar wood were subjected to thermal treatment at 180oC and 200oC, for durations of 2, 4, 6, 8 and 10 hours, in order to investigate the effect of heat treatment on the hygroscopic properties. Specifically, the change of equilibrium moisture content, density, swelling and absorption of wood were examined, in order to determine the significance of treatment temperature and duration in the enhancement of wood hygroscopicity. Generally, swelling in tangential direction proved to be quite higher than swelling in radial direction, while thermal treatment enhanced in great extent swelling in tangential and radial direction and the absorption of the specimens as well. Swelling in tangential direction decreased within the range of 8.17% and 33.3% for specimens treated at 180oC and the range of 43.85% and 65.09% for specimens treated at 200oC for 2-10 hours, referring to the final measurement after 72 hours of water immersion. In radial direction, the swelling decrease ranged between 2.47% and 28.45% for specimens treated at 180oC and between 19.62% and 60.87% for specimens treated at 200oC for 2-10 hours, respectively, after 72 hours immersion. Most of the heat treatments resulted also in absorption decrease, attesting the improvement of the poplar wood hygroscopic behavior. Finally, as it was proved, the higher the treatment temperature that is applied, the shorter is the duration, needed for the same swelling and absorption decrease level to be achieved.
机译：为了研究热处理对吸湿性能的影响，将杨木板材分别在180°C和200°C下进行2、4、6、8和10小时的热处理。具体而言，检查了木材中平衡水分含量，密度，溶胀和吸收的变化，以确定处理温度和持续时间对增强木材吸湿性的重要性。通常，切向溶胀比径向溶胀要高得多，而热处理在切向和径向溶胀以及样品吸收方面都大大增强。切向膨胀率在180oC下处理的试样的下降范围为8.17％和33.3％，在200oC下处理2-10小时的试样的下降幅度为43.85％和65.09％，是指将水浸泡72小时后的最终测量值。在径向方向上，浸入72小时后，在180oC处理的样品的溶胀降低范围在2.47％至28.45％之间，在200oC处理2-10小时的样品的溶胀降低范围分别在19.62％和60.87％之间。大多数热处理还导致吸收减少，证明了杨木吸湿性能的改善。最后，如所证明的，所施加的处理温度越高，达到相同溶胀和吸收降低水平所需的持续时间越短。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号