热处理西加云杉音板用材性能研究  

Performance of Heat-Treated Sitka SpruceWood for Soundboards

作　　者：程亚飞 姜天乐 翟树杰 丁涛 CHENG Ya-fei;JIANG Tian-le;ZHAI Shu-jie;DING Tao(College of Materials Science and Engineering,Nanjing Forestry University,Nanjing 210037,Jiangsu,China)

机构地区：[1]南京林业大学材料科学与工程学院,江苏南京210037

出　　处：《木材科学与技术》2022年第4期57-62,共6页Chinese Journal of Wood Science and Technology

基　　金：林业科技成果国家级推广项目“木质材料高温热处理技术推广示范”([2019]18);江苏省高等学校大学生创新创业训练计划项目“基于热处理的木材声学性能改良技术研究”(201910298005Z)。

摘　　要：为考察热处理对木材声学性能的调节作用,采用160℃常压过热蒸汽对西加云杉(Picea sitchensis)音板用材分别处理0.5、1.5、2.0 h,测试分析热处理材的声学性能、吸湿性和颜色,并采用动态热机械分析对木材黏弹性和改性机理进行探讨。结果表明:热处理提高了木材的声学性能,与未处理材相比,热处理材的比动态弹性模量提高了30.4%~36.4%,声辐射品质常数提高了19.1%~22.3%,声转换效率提高了44.8%~48.6%。热处理后木材的吸湿性明显下降,有助于提高和稳定木材的声学性能,而热处理材的外观则呈现近似天然老化木材的特征。In order to investigate the effect of heat treatment on acoustic properties of wood,Sitka spruce boards were thermally treated with the atmospheric superheated steam at 160℃for 0.5,1.5 or 2.0 hours.The acoustic properties,hygroscopicity,and color of the heat-treated wood were assessed.Dynamic thermomechanical analysis was applied to investigate wood viscoelasticity and property modification mechanism.The results showed that heat treatment improved wood acoustic properties.After the treatments,the specific dynamic elastic modulus increased by 30.4%~36.4%,the quality constant increased by 19.1%~22.3%,and the sound conversion efficiency increased by 44.8%~48.6%.The hygroscopicity of the heat-treated wood was found much lower than the control,which helped both improve and stabilize the acoustic properties,and the after-treatment appearance was similar to the naturally aged wood.

关 键 词：西加云杉 音板用材 热处理 声学性能 材色 吸湿性 

分 类 号：S791.18[农业科学—林木遗传育种] S781.38[农业科学—林学]