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当前位置: 首页 > 文章 > 高温软化处理对竹材性能及旋切单板质量的影响 林业科学 2006,42 (11) 101-104
Position: Home > Articles > Effect of Softening Treatment at High Temperature on Property and Veneer Quality of Bamboo Scientia Silvae Sinicae 2006,42 (11) 101-104

高温软化处理对竹材性能及旋切单板质量的影响

作  者：
程瑞香;张齐生
单  位：
东北林业大学生物质材料科学与技术教育部重点实验室;南京林业大学竹材工程研究中心
关键词：
软化处理;竹材;单板;硬度;动态热机械分析(DMA)
摘  要：
采用高温软化竹材工艺,对在120℃密闭高温条件下软化30min的软化工艺效果进行研究。结果表明:竹材经密闭高温120℃软化30min后,其弹性模量大幅度下降,由未处理前的8912MPa下降到6417MPa,竹材经高温软化处理后塑性提高。动态热机械分析(DMA)的试验结果表明:未软化处理竹材的Tg为120℃,高温软化处理竹材的Tg为88℃,软化处理竹材比未软化处理竹材的Tg下降了26.7%。硬度测试结果表明:经高温软化处理后,竹材的硬度大幅度下降,近青面和近黄面分别下降了42.0%和54.7%。通过对旋切竹单板质量的测定表明:竹材在密闭高温120℃软化30min的工艺下,旋切的竹材单板表面质量可以得到保证。
译  名：
Effect of Softening Treatment at High Temperature on Property and Veneer Quality of Bamboo
作  者：
Cheng Ruixiang1 Zhang Qisheng2(1.Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education,Northeast Forestry University Harbin 150040)(2.Bamboo Engineering Research Center,Nanjing Forestry University Nanjing 210037)
关键词：
softening treatment;bamboo;veneer;hardness;dynamic mechanical analysis(DMA)
摘  要：
Because bamboo absorbs water slowly,the softening time of bamboo blocks by this routine softening method lasts long.In order to improve bamboo softening effect and effeciecy quickly,softening treatment technology at high temperature was adopted.Effect of softening treatment of bamboo at 120 ℃ for 30 min was studied in this paper.The results of modulus of elasticity(MOE)of bamboo showed that the MOE of bamboo strip after softening treatment for 30 min at 120 ℃ was decreased from 8 912 MPa to 6 417 MPa which meant that plasticity of bamboo was increased greatly.The results of dynamic mechanical analysis(DMA)showed that glass transition temperature(T_g)of no softening treatment bamboo was 120 ℃,while T_gof softening treatment bamboo at 120 ℃ for 30 min was 88 ℃,T_g of softening treatment bamboo at 120 ℃ for 30 min decreased 26.7% compared with that of no softening treatment bamboo.The results of hardness showed that the hardness of surface near outer part of bamboo and surface near inner part of bamboo after softening treatment for 30 min at 120 ℃ was decreased with 42.0% and 54.6% respectivly compared with no softening treatment bamboo.The results of thickness deviation and lathe check on the loose side of veneer showed that surface quantity of bamboo veneer can be guaranteed after softened at 120 ℃ for 30 min.

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