杨木地板基材密实和碳化改性

采用"密实化(常温/100℃、增湿/不增湿)-炭化(温度:240、260、280℃;时间:30～180s)"两步法工艺改性意杨木材,测试了密实前后板材的断面密度分布,密实后板材的吸湿/水浴回弹,以及炭化后板材的表面硬度、耐磨性和润湿性。结果表明:密实化提高了木材的表层密度,压缩率由表及里呈递减趋势,压缩程度可由密实工艺参数调控;在常温、常湿条件下,密实后的意杨板材具有较低的回弹率;密实和炭化提高了木材的硬度和表面耐磨性,改变了木材的表面润湿性。

Poplar parquet modification by densification and surface carbonization

Fast-grown wood,as a potential substance for natural forests,can be modified to make products such as parquet with satisfying hardness and surface abradability.In this paper,a combined method,i.e.,densification plus carbonization,was tried to optimize properties of poplar wood.Densification was conducted at room temperature(RT) and 100 ℃,with and without water.Densification lumbers were further carbonized at 240,260,or 280 ℃,for 30 to 180 seconds.Vertical density profile(VDP) of densified and control poplar lumbers was measured.Densified samples were conditioned or bathed for springback test.Furthermore,samples after densification and/or carbonization were used to test surface hardness,abrasive resistance,and wettability.Results were drawn as follows: Poplar lumbers were obviously densified resulting a V-shaped compression rate profile(CRP) in thickness,which can be adjusted by densification parameters.Densified lumber showed ignorable springback under RT&65 %RH.Densified and/or carbonized poplar lumbers showed improved surface hardness and abradability,and changed surface wettability.