| I-214杨木光变色的规律及机理研究 |
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| 引用本文： | 郭洪武,闫昊鹏,王金林,李春生.I-214杨木光变色的规律及机理研究[J].北京林业大学学报,2010,32(1):89-91. |
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| 作者姓名： | 郭洪武 闫昊鹏 王金林 李春生 |
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| 作者单位： | 1 北京林业大学材料科学与技术学院2中国林业科学研究院木材工业研究所 |
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| 基金项目： | “十一五”国家科技支撑计划项目(2006BAD18B06);;“948”国家林业局引进项目(2006-4-C04) |
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| 摘 要： | 以I-214杨木单板为试材、氙光作为辐射光源,考察I-214杨木单板在100h光照过程中试材表面材色的变化规律;依据红外光谱图的谱峰位置和谱峰相对吸收强度,分析和确定光变色过程中杨木木材的化学组分。结果表明:杨木木材受光辐射易发生变色,主要表现为明度指数L*降低,色度指数a*、b*上升;若以波数1510cm-1为基准,非共轭羰基C?O振动的吸收峰(1738cm-1)吸收强度显著增强;共轭羰基C?O伸缩振动的吸收峰(1650cm-1)有所增强;芳香环骨架C—C振动的吸收峰(1510cm-1)吸收强度明显减弱;C—O—H振动的吸收峰(1160～1052cm-1)吸收强度有所减弱。
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| 关 键 词： | I-214杨木 光变色 红外光谱 光变色机理 |
| 收稿时间： | 1900-01-01 |
Laws and mechanism of photo-discoloration of Ⅰ-214 poplar veneer |
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| GUO Hong-wu,YAN Hao-peng,WANG Jin-lin,LI Chun-sheng.Laws and mechanism of photo-discoloration of Ⅰ-214 poplar veneer[J].Journal of Beijing Forestry University,2010,32(1):89-91. |
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| Authors: | GUO Hong-wu YAN Hao-peng WANG Jin-lin LI Chun-sheng |
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| Institution: | 1 College of Materials Science and Technology，Beijing Forestry University,100083,P.R.China; 2 Research Institute of Wood Industry,Chinese Academy of Forestry,Beijing,100091, P.R.China. |
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| Abstract: | In this study,veneers of I-214 poplar (Populus euramericana cv. I-214) were irradiated by Xenon fade meter,and the photo-discoloration mechanism was explored. Based on the peak positions of FTIR spectra and relative changes in absorbance intensity,the changes in chemical compositions of wood veneer during photo-discoloration were analyzed and determined. Results indicated that poplar wood was susceptible to photo-discoloration by light irradiation,which was indicated by the decrease in lightness index(L~) a... |
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| Keywords: | I-214 poplar veneer photochrimism FTIR spectra photo-discoloration mechanism |
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