摘要
微波处理对木材化学组分含量影响的研究有助于了解木材微波处理机理。以樟子松为原料,使用隧道式微波设备处理木材,在试验条件下,木材中心最高温度可达183℃;微波功率密度和初含水率及二者的交互作用,对樟子松木材中三大素成分含量变化具有显著影响。处理后木质素相对含量增加,纤维素和半纤维素含量降幅小于5%;冷水抽提物、苯醇抽提物和1%NaOH抽提物含量降低;处理材pH值升高,但仍处于酸性范围;灰分含量保持不变。
In this research,Mongolian scotch pine(Pinus sylvestris var.mongolica Litv.)was used as raw material to prepare microwave puffed wood.During the treatment,the maximum temperature at the center of the wood reached 183°C.Microwave power density and initial moisture content and the interaction of these two factors showed a significant effect on the content changes of the three major components in the samples.The relative content of lignin increased compared with untreated wood,while the contents of cellulose and hemicellulose decreased less than 5%.The contents of cold water extractive,benzyl alcohol extractive,and 1%NaOH extractive of treated wood samples decreased with the escaping of water vapor during the treatment.The pH value of the puffed wood samples increased but the wood stayed acidic.The ash content remained unchanged.
作者
徐恩光
林兰英
李善明
彭立民
傅峰
XU En-guang;LIN Lan-ying;LI Shan-ming;PENG Li-min;FU Feng(Research Institute of Wood Industry,Chinese Academy of Forestry,Beijing 100091,China)
出处
《木材工业》
北大核心
2020年第4期31-37,共7页
China Wood Industry
基金
“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“基于微波膨化木材的弯曲特性和机制研究”(CAFYBB2018SY030)
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)。
关键词
微波膨化木
处理温度
木材组分含量
抽提物含量
microwave puffed wood
temperature
wood composition content
extractive content
