文献类型：期刊文献

中文题名：高能微波预处理辐射松木材的弯曲性能研究

英文题名：Effect of High Energy Density Microwave Pretreatment on Bendability of Radiata Pine(Pinus radiata)Wood

作者：李善明[1,2] 邢雪峰[2,3] 林兰英[1,2] 周永东[2] 傅峰[2]

第一作者：李善明

机构：[1]中国林业科学研究院林业新技术研究所,北京100091;[2]中国林业科学研究院木材工业研究所,北京100091;[3]南京林业大学材料与工程学院,江苏南京210037

年份：2020

卷号：34

期号：5

起止页码：1-6

中文期刊名：木材工业

外文期刊名：China Wood Industry

收录：CSTPCD;;北大核心:【北大核心2017】；

基金：中央级公益性科研院所基本科研业务费专项资金“基于微波膨化木材的弯曲特性和机制研究”(CAFYBB2018SY030)。

语种：中文

中文关键词：辐射松;微波预处理;能量密度;最小弯曲半径;弯曲系数

外文关键词：microwave pretreatment;energy density;minimum bending radius;coefficient of bendability

分类号：S781;S791.252

摘要：利用高能微波对辐射松木材进行预处理,分析其对木材弯曲性能的影响。随着微波能量密度增大,辐射松木材的弯曲系数呈先增加后减小的趋势,表明通过适当的高能微波预处理工艺,可改善辐射松木材的弯曲性能,但微波能量密度增加到一定值则木材结构被破坏,导致弯曲性能下降。辐射松木材弯曲性能最优预处理工艺为:微波功率100 kW、处理速度1.0 m/min,修正微波能量密度为31.56 kW?h/m^3,该条件处理辐射松木材的弯曲系数(Kbend)最大值为0.032(弯曲系数变化率1/Kbend值为31.25),高于白蜡木和榆木等弯曲性能优良的木材。
Radiata pine(Pinus radiata)wood was treated under high energy density microwave conditions to improve its bending property.The results showed that the coefficient of Pinus radiata wood bendability increased at the beginning of the process,then decreased with the increasing of microwave energy density.Through a proper pretreating process,the excellent bending property of Pinus radiata wood could be obtained.When the microwave energy density increased to a certain value,microscopical cracks appeared in wood,and the bending properties decreased.The optimal microwave pretreatment process was 100 kW(microwave power),1.0 m/min(processing speed);the corresponding energy density of microwave treatment was 31.56 kW?h/m^3.For Pinus radiata wood treated under the optimal condition,the maximum coefficient of bendability Kbend was 0.032(corresponding to the coefficient derivative of bendability 1/Kbend value of 31.25),which was higher than that of the untreated beech,ash wood and elm wood.