水热及高温处理工艺对杨木表面润湿性能的影响

Effects of Thermal or Hydrothermal Treatment on the Wettability of Fast-growing Poplar Timber

探究杨木经水热及高温处理前后,其表面润湿性能的变化规律。研究表明,在水热处理改性的过程中,随着水热处理时间的增加(处理温度为100℃,处理时间分别为2、6、10h和14h),杨木试件表面润湿性能有所增加,这种改变可以通过时间因素的控制得以实现。在高温改性的过程中,处理温度恒定的条件下(处理温度分别为160、190℃和210℃),随着处理时间的增加(处理时间分别为1、2h和3h),杨木试件的润湿性能显著降低。同时,不同处理温度条件下的润湿性能曲线是不相交的,呈现3个不重合的区域分布状态,并且随着温度的增高,杨木试件润湿性能降低。

Samples of poplar timber were thermally or hydrothermally treated to examine the variations of its wettability. The results showed that under hydrothermal treatment （100℃, 2,6,10, and 14 h, respec tively）, the surface wettability increased with time,indicating that the variation could be controlled by pro- cessing time. With high temperature treatment （160,190, and 210℃ ,and 1,2, and 3 h, respectively）, the timber wettability decreased significantly with time under the same temperature. Three variation curves of wettability under different temperatures did not meet, they were distributed in three different regions. Fur- thermore,the wettability decreased with temperature.