高温热处理对挪威云杉及泡桐木振动性能和化学组分的影响  

Effects of High Temperature Heat Treatment on Vibration Characteristics and Chemical Components of Norway Spruce and Paulownia

作　　者：蔡金澄 雒翠梅 王旭洁 母军[1] CAI Jin-cheng;LUO Cui-mei;WANG Xu-jie;MU Jun(MOE Key Laboratory of Wooden Material Science and Application,College of Materials Science and Technology,Beijing Forestry University,Beijing100083,P.R.China)

机构地区：[1]木质材料科学与应用教育部重点实验室,北京林业大学材料科学与技术学院,北京100083

出　　处：《林产工业》2023年第11期14-20,共7页China Forest Products Industry

基　　金：国家自然科学基金项目(31971589)。

摘　　要：为考察高温热处理对2种乒乓球底板基材常用木材的振动性能及化学组分的影响,采用常压水蒸气为保护介质,对挪威云杉(Picea abies)和泡桐(Paulownia tomentosa)木材进行热改性处理,温度为190、210、230℃,保温时间为2 h,分析不同热处理温度对2种木材振动性能、结晶度及化学官能团的影响。结果表明:热处理后,挪威云杉和泡桐木的化学组分均发生了一定变化,但均未发生某一组分的完全降解;2种木材的结晶度均有所提升,挪威云杉在230℃时显示出最大结晶度增幅(52.15%,+4.13%),而泡桐的最大增幅出现在210℃(42.94%、+6.17%)。高温热处理能有效改善挪威云杉和泡桐木的固有频率f、对数衰减率δ以及比动弹性模量E/ρ。In order to investigate the effect of heat treatment on the vibration properties and chemical components of two commonly used woods for making table tennis blades.Norway spruce(Picea abies)and Paulownia(Paulownia tomentosa)were modified by heat treatment with superheated steam at atmospheric pressure as the protection medium.Heat treatment parameters were set at 190,210℃C and 230℃for 2 hours.The effects of temperature on vibration properties,crystallinity,and chemical functional groups of spruce and paulownia were analyzed.The results showed that:The chemical components of spruce and paulownia after heat treatment changed to some extent,but no complete degradation of a specific component occurred;The crystallinity of both spruce and paulownia improved after heat treatment with(52.15%,+4.13%)at 230℃for spruce and(42.94%,+6.17%)at 210℃for paulownia.Natural frequency f,logarithmic decay rate,and specific dynamic elastic modulus Elp of spruce and paulownia improved after heat treatment.

关 键 词：挪威云杉木 泡桐木 高温热处理 振动性能 化学组分 

分 类 号：TS6[轻工技术与工程] TS396