毛白杨压缩变形回复工艺与应用的研究

A Study on the Technique and Application of Compressive Deformation Recovery of Poplar Timber

采用水煮软化和浸泡-微波软化方法处理毛白杨(Populus tomentosa),然后在120、140、160℃热压温度下横纹压缩,再通过冷水浸泡回复处理使压缩变形回复。分析软化工艺、热压温度对木材回复率的影响。探索基于木材黏弹性的压缩变形全回复优化工艺参数并采用该工艺制作工艺品。结果表明,优化工艺参数,将试材浸泡12h后采用80kW微波功率处理30s,再在140℃下进行横纹压缩,经冷水浸泡10h回复率可达到80.26%;工艺品应用实例证明了该工艺方法在生产实际中的可行性。本研究结果为提高低质速生木材的产品附加值提供新途径。

In this study, timbers of poplar （Populus tomentosa）were softened by hot water immersion or microwave assisted water immersion,and then compressed cross the grain at the temperatures of 120℃, 140℃ and 160℃. Effects of softening and hot pressing temperature on the recovery of wood were analyzed. The process parameters of full recovery of compression deformation based on the viscoelasticity of wood were studied. The results showed that the optimization of process parameters were the poplar wood treated by using 80 kW microwave power 30 s after 12 h water immersion,and compressed at 140℃. The cold wa- ter immersion 10 h recovery rate of the wood could reach 80.26%. The application in crafts making con- firmed that this technique was feasible. The results of this study would provide a new way to increase the added value of low quality and fast growing wood.