摘要
低分子量树脂浸渍是一种常用的木材增强提质改性技术。进入木材细胞壁并附着或填充于细胞腔中的树脂,通过密实木材基体提高处理材密度和力学强度,通过容胀木材细胞壁、封闭羟基等水分吸着点改善其尺寸稳定性,低分子量树脂浸渍成为提升木材尤其是速生人工林木材的附加值、拓宽其应用领域的重要技术手段。木材树脂浸渍改性包括树脂浸渍处理与浸渍材干燥处理,随着木材树脂浸渍改性技术的发展与应用,干燥作为树脂浸渍材制备与产业化推广应用的关键技术环节,正逐渐受到研究人员的关注和重视。为此,本文分别就树脂浸渍及浸渍材干燥两方面的国内外研究进展进行了梳理与总结,包括木材树脂浸渍改性的主要内外在影响因素,浸渍改性的新技术和新方向,以及干燥工艺技术对树脂浸渍材干燥特性的影响、干燥过程中的水分迁移与树脂固化特性等并在此基础上提出了该领域的主要问题与未来重点研究方向。
Resin modification is one of the enhancement treatments by filling wood cell lumina and cell wall with low molecular weight thermosetting resin,which could form a stiff network with themselves to increase wood density as well as strength properties,and by bulking the cell wall,blocking hydroxyl group or reducing water sorption sites to improve dimensional properties of wood.For this reason,modified wood,especially for fast-growing wood with low density and poor dimensional stability,with resin impregnation would promote its added value and widen its end-use.There are two steps involved in making resin modified wood,the resin impregnation treatment and the drying of impregnated wood.With the development of wood resin modification,drying,as a key technical of resin-modified wood preparation and industrial application,has been paid more and more attention by researchers.This paper reviewed both research progress on them,respectively.Specifically,the main internal and external factors on wood resin modification,and the new technology of resin modification were systematically introduced and described.After that,the influence of different drying technology on the drying characteristics of resin impregnated wood,the moisture transfer and resin curing characteristics during the drying process were introduced emphatically.Finally,the main problems and the research work of the future in this field was proposed.
作者
徐康
张晓萌
李中昊
周川玲
吕建雄
李贤军
吴义强
XU Kang;ZHANG Xiaomeng;LI Zhonghao;ZHOU Chuanling;LYU Jianxiong;LI Xianjun;WU Yiqiang(College of Material Science and Engineering,Central South University of Forestry and Technology,Changsha 410004,China;Zhejiang Academy of Forestry,Hangzhou 310023,China;Research Institute of Wood Industry,Chinese Academy of Forestry,Beijing 100091,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2022年第6期219-225,共7页
Materials Reports
基金
国家自然科学基金(31800479)
湖南省自然科学基金(2020JJ5978)
湖南省教育厅优秀青年项目(19B592)
中南林业科技大学引进人才科研启动基金项目(2019YJ015)。
关键词
树脂浸渍
浸渍材干燥
水分迁移
树脂固化
resin impregnation
resin impregnated wood drying
moisture transfer
resin curing
