热处理木材性能改良与工艺优化研究进展

Research progress on performance improvement and process optimization of thermally treated wood

热处理木材是一种环保无污染且绿色可持续材料。但木材经过热处理会导致其部分力学性能下降、表面润湿性能不足及容易发生光老化等问题。传统的热处理技术所需要的高温环境会产生大量能耗,导致生产成本较高。针对以上热处理木材存在的性能缺陷和生产工艺不足,从热处理木材性能改良和工艺优化两个角度,概述了国内外热处理木材的性能改良研究进展。具体内容涉及热处理木材力学性能改良、表面润湿性能改良、耐光老化性能改良和热处理工艺优化4个方面。分析了热处理木材相关性能改良方法的局限性和改进措施,提出了木材热处理改性应在结合改性机制和实际应用的基础上,对热处理造成的潜在木材性能劣化进行规避,以更好地体现其综合性能优势,提高附加值并拓展应用范围。

Thermally treated wood is an eco-friendly and sustainable material.After thermal treatment,some mechanical properties and surface wettability of wood reduces,and light aging is more likely to occur.In addition,the high temperature environment is required for the traditional technology during the thermal treatment process,which produces a lot of energy consumption,resulting in high production costs.In view of the performance defects of thermally treated wood and the shortcomings of production process,the research progress on performance improvement of thermally treated wood is summarized from the following two aspects:Performance improvement and process optimization.The enhancements on mechanical property,surface wettability,anti-weathering of thermally treated wood,and thermal treatment process optimization are discussed.Also,the limitation of the methods for properties improvement of thermally treated wood is analyzed,and the solutions are proposed.After that,this work suggest that it is better to combine the mechanism and practical application of thermally treated wood to avoid performance degradation caused by heat treatment,and to show the advantage of overall performance of thermally treated wood,which could increase the value-added utilization and expand the scope of application.