动态润湿性是木质材料的一个重要界面特性，用于描述胶黏剂在木材表面上的润湿行为。笔者采用润湿模型描述动态接触角(θ)在木质基材表面上的扩展过程，模型中利用参数K值来描述胶黏剂在木质基材表面上的动态润湿行为。应用此模型分析了不同压缩工艺条件下脲醛树脂和酚醛树脂的湿润性能；比较了不同压缩工艺参数如压缩率、热压温度和热压时间对动态润湿性的影响。结果表明，润湿模型能够准确地描述胶黏剂在预压缩杨木表面的动态湿润过程。在预压过程中，保压时间是对K值影响最为显著的因素。
Abstract
Wettability is an important surface characteristics which describes what happens at the wood surface when it contacts with an adhesive. A wetting model was developed to describe the wetting process of adhesives at the woodbased material surface. The K value was used to evaluate the kinetics of wetting during the adhesive wetting process. Applying the wetting model, urea formaldehyde resin (UF) and phenol formaldehyde resin (PF) wetting properties of precompressed poplar at different compressing process conditions were investigated. Moreover, the effects of the parameters of poplar precompressing, e.g.compression ratio, the platen temperature and the pressing time on wettability were compared. The results showed that the wetting model could accurately describe the dynamic adhesive wetting process at precompressed poplar surface. The pressing time was the most significant factor which affects K value.
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基金
收稿日期：2008-12-04修回日期：2009-07-08基金项目：国家“十一五”科技支撑计划(2006BAD07A0704)作者简介：韩书广(1971—)，讲师，博士，研究方向为人造板及胶黏剂。Email: hanshg@126.com。引文格式：韩书广,黄润州,周兆兵,等. 预压缩杨木的动态润湿性[J]. 南京林业大学学报:自然科学版,2009,33(6):11-14.
