热改性木材化学成分变化及其影响因素  

Changes in Chemical Constituents of Thermally Modified Wood and Its Influencing Factors

作　　者：刘淑敏 曹金珍[1] Liu Shumin;Cao Jinzhen(Ministry of Education Key Laboratory of Wooden Material Science and Application,Beijing Forestry University,Beijing 100083,China)

机构地区：[1]北京林业大学木质材料科学与应用教育部重点实验室,北京100083

出　　处：《世界林业研究》2022年第6期56-62,共7页World Forestry Research

基　　金：国家自然科学基金“热改性木材化学成分及构造变化与耐腐性响应机制研究”(32071696)。

摘　　要：木材易产生吸湿变形和腐朽等问题,影响其应用效果。热改性处理可有效提升木材的尺寸稳定性和耐久性,并具有无毒、环保的特点,是一种极具潜力的木材改性方法。文中综述了木材组分(纤维素、半纤维素、木质素、抽提物)在热改性过程中发生的化学变化,以及木材树种和部位、处理介质、处理温度和时间对木材热降解的影响。经不同热改性工艺处理后,木材的化学成分变化存在较大差异。探明热改性工艺、热改性材化学成分变化和性能之间的响应机制,将有助于开发或优化热改性技术,从而得到性能优异的热改性材,拓宽其应用领域。Wood is vulnerable to hygroscopic deformation and decay, which adversely influence its application. Thermal modification, which is nontoxic and environment-friendly, is an effective wood modification method with great potential to enhance the dimensional stability and durability of wood. This paper summarizes the chemical changes of wood components(cellulose, hemicellulose, lignin and extractives) during the thermal modification process, as well as the effects of wood species and parts,treatment atmosphere, treatment temperature and duration on wood thermal degradation. The changes in the chemical constituents of wood differ greatly with different thermal modification treatment processes.Therefore, the clarification of the response mechanism of thermal modification process, chemical constituent change and properties of thermally-modified wood will help to develop or optimize thermal modification technology, so as to obtain thermally modified wood with excellent performance and broaden their application fields.

关 键 词：木材 热改性 化学成分 影响因素 

分 类 号：S781[农业科学—木材科学与技术]