文献类型：期刊文献

中文题名：微波处理对樟子松木材等温吸湿特性的影响

英文题名：Effect of Microwave Treatment on Moisture Sorption Isotherm of Mongolian Scotch Pine

作者：徐恩光[1] 林兰英[1] 李善明[1] 彭立民[1] 傅峰[1]

第一作者：徐恩光

机构：[1]中国林业科学研究院木材工业研究所,北京100091

年份：2021

卷号：35

期号：1

起止页码：20-25

中文期刊名：木材科学与技术

外文期刊名：China Wood Industry

收录：CSTPCD;;北大核心:【北大核心2020】；

基金：浙江省省院合作林业科技项目“大功率微波膨化重组装饰材制备技术研究与示范”(2017SY15);“十二五”国家科技支撑计划“木质隔声和发热新材料制造关键技术与示范”(2015BAD14B04);国家林草局林业科学技术推广项目“基于高能微波处理的节材高效利用技术”([2019]42号);中央级公益性科研院所基本科研业务费专项资金“基于微波处理材的弯曲特性和机制研究”(CAFYBB2018SY030)。

语种：中文

中文关键词：微波处理;樟子松木材;等温吸湿;GAB模型;比表面积

外文关键词：microwave treated wood;Mongolian scotch pine(Pinus sylvestris var.mongolica Litv.);sorption isotherms;GAB model;specific surface area

分类号：S781;S791.253

摘要：以樟子松木材为对象,使用动态水分吸附仪,借助GAB模型分析微波处理对樟子松试材的等温吸湿特性影响。结果表明,GAB模型能够很好地描述樟子松微波处理材的等温吸湿特性,微波处理没有改变木材等温吸湿曲线线型;微波处理后樟子松木材平衡含水率下降,单层分子饱和吸附量和有效比表面积降低,表明微波处理可以降低樟子松木材的吸湿性能。在低初含水率或高微波功率密度条件下,木材平衡含水率变化量较大,且早材的平衡含水率降幅大于晚材,说明微波处理对早材细胞壁的影响较大。
In this research,the dynamic vapor adsorption system with a GAB model was used to analyze the isothermal hygroscopic characteristics of the microwave treated Mongolian scotch pine(Pinus sylvestris var.mongolica Litv.)wood.The results showed that the GAB model described the isotherm moisture absorption process of microwave treated wood well;microwave treatment did not change the isotherm moisture absorption curve line shape.After a microwave treatment,the equilibrium moisture content decreased;the monolayer saturation adsorption and the effective specific surface area decreased.The decreased degree was significant when the initial moisture content was low and/or the microwave power density was high.It was indicated that a microwave treatment reduced the moisture absorption property of Mongolian scotch pine wood effectively.Under the condition of low initial moisture content or high microwave power density,the change of equilibrium moisture content was larger,and the decrease of equilibrium moisture content of early wood was greater than that of late wood,which indicated that microwave treatment had more influence on early wood cell wall.