| 杨树浸渍改性处理材尺寸稳定性研究 |
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| 引用本文： | 李志高,王勇,陈泽君,马芳,范友华.杨树浸渍改性处理材尺寸稳定性研究[J].湖南林业科技,2013(4):44-47. |
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| 作者姓名： | 李志高 王勇 陈泽君 马芳 范友华 |
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| 作者单位： | 湖南省林业科学院,湖南长沙410004 |
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| 基金项目： | 湖南省科技厅科技计划项目（2012NK2002）;湖南省林产工业建设专项项目. |
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| 摘 要： | 利用聚乙烯醇缩甲醛改性剂对杨树木材进行浸渍改性,对其改性材的尺寸稳定性进行研究。结果表明:改性材的径向、弦向和体积干缩率与素材相比均有不同程度的下降;从全干到吸水饱和状态的过程中,当改性剂达到一定浓度时,改性材的径向、体积湿胀率与素材相比有明显下降,弦向线湿胀率下降不明显。从气干到吸水饱和状态的过程中,改性材的径向、弦向湿胀率与素材相比均有不同程度的下降;改性材体积湿胀率随着改性剂浓度的上升而呈下降趋势,当改性剂浓度为30%时,改性材体积湿胀率为6.85%,与素材相比下降了5.54%。改性材吸水率随改性剂浓度的上升而下降,最低可达159%;改性材的抗干缩系数(ASE)随改性剂浓度上升而增加,最大可达47.8%。改性材的尺寸稳定性能要明显优于杨树素材。
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| 关 键 词： | 杨木 改性 吸水性 抗干缩系数 |
Research on dimensional stability of treated poplar wood |
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| LI Zhigao,WANG Yong,CHEN Zejun,MA Fang,FAN Youhua.Research on dimensional stability of treated poplar wood[J].Hunan Forestry Science & Technology,2013(4):44-47. |
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| Authors: | LI Zhigao WANG Yong CHEN Zejun MA Fang FAN Youhua |
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| Institution: | ( Hunan Academy of Forestry, Changsha 410004, China) |
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| Abstract: | The dimensional stability of treated poplar wood with polyvinyl formal as the modifier was researched. The result showed that in different conditions, the radial, tangential, volumetric shrinkage rates of modified wood were decreased. From oven - dry state to water saturation state, the radial and volumetric swelling rates were obviously decreased when the modifier content reached at least 20% or above. At the same time, the tangential swelling rate was decreased not obviously. From air-dry state to water saturation state, the radial and tangential swelling inflation rates of modified wood were decreased. At the same time, as the rising content of modifier, the volumetric swelling inflation rates of modified wood were decreased. When the modifier content reached 30%, the volumetric swell- ing rate of treated wood was 6. 85% that decreased by 5.54% compared with poplar wood. Water absorption ratio of treated wood de- creased to 159%. ASE of modified wood could reach 47. 8% as the increase of modifier content. Dimensional stability of modified wood was better than poplar wood. |
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| Keywords: | poplar modification water absorption ASE |
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