甘油预处理对热处理材尺寸稳定性的影响

Glycerin Pretreatment Effect on Heat-treated Wood Dimensional Stability

为提高木材的尺寸稳定性,采用甘油水溶液对毛白杨和云杉进行预处理,然后再进行热处理。通过检测处理材的密度、平衡含水率、吸水和吸湿抗胀率等,结果表明:与未预处理的热处理材相比,经甘油水溶液预处理后,热处理材的密度增加率提高;平衡含水率先降低后增加;吸水和吸湿抗胀率均显著增加。

Poplar（Populus tomentosa） and spruce（Picea asperata） samples were pretreated by soaking them in a glycerin solution before further heat treatment.Density increasing rate,moisture content,moisture adsorption antiswelling efficiency（ASE）,and water absorption ASE of the treated wood samples were measured.The results showed that after glycerin pretreatment the sample＇s density increasing rate increased,their equilibrium moisture content first decreased but then increased,and both moisture adsorption and water absorption ASEs also increased.