Performance of Heat-Treated Sitka Spruce Wood for Soundboards

Ya-fei CHENG; Tian-le JIANG; Shu-jie ZHAI; Tao DING

doi:10.12326/j.2096-9694.2021182

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Performance of Heat-Treated Sitka Spruce Wood for Soundboards
1.College of Materials Science and Engineering，Nanjing Forestry University，Nanjing 210037，Jiangsu，China
Vol. 36, Issue 4, Pages: 57-62(2022)
DOI： 10.12326/j.2096-9694.2021182

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程亚飞,姜天乐,翟树杰等.热处理西加云杉音板用材性能研究[J].木材科学与技术,2022,36(04):57-62.

CHENG Ya-fei,JIANG Tian-le,ZHAI Shu-jie,et al.Performance of Heat-Treated Sitka Spruce Wood for Soundboards[J].Chinese Journal of Wood Science and Technology,2022,36(04):57-62.
程亚飞,姜天乐,翟树杰等.热处理西加云杉音板用材性能研究[J].木材科学与技术,2022,36(04):57-62. DOI： 10.12326/j.2096-9694.2021182.

CHENG Ya-fei,JIANG Tian-le,ZHAI Shu-jie,et al.Performance of Heat-Treated Sitka Spruce Wood for Soundboards[J].Chinese Journal of Wood Science and Technology,2022,36(04):57-62. DOI： 10.12326/j.2096-9694.2021182.

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。

Abstract

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

Keywords

Sitka sprucewood soundboardheat treatmentacoustic propertywood colormoisture sorption

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