椴木单板表面光辐射变化的研究  

Study on the Changes of Radiation on the Surface of Basswood Veneer

作　　者：张翔宇[1] 苏润洲[1] 孙尤优[1] 

机构地区：[1]东北林业大学,黑龙江哈尔滨150040

出　　处：《林业科技》2010年第5期46-49,共4页Forestry Science & Technology

摘　　要：以椴木单板为试材,利用紫外灯进行光辐射试验,使用红外光谱仪和分光光度计分析其光变色规律。结果表明,木材受紫外光辐射易发生光化学反应,木质素发生降解,非共轭羰基增加。前10h变化较大,从10-50h则变化明显缓慢,出现变化饱和现象;色度指数变化主要表现为黄蓝度b＊显著增加,明度指数L＊、红绿度a＊变化不明显。In order to analysis the light color rules,it was tested by UV lamps with the test material of linden wood veneer,and used FT-IR and Spectro-Photometer.The results showed these information.Wood was easy to appear the phenomenon of photochemical reactions under UV radiation.Lignin came about degradation.Unconjugated Carbonyl groups increased.It changed greatly at first 10 hours,and became slowly from 10 hours to 50 hours in saturation.The changes of the lightness index were showed in aspects of the significantly increasement of yellow-blue-degree（b＊）,and minor changes of lightness index（L＊）and red-green-degree（a＊）.

关 键 词：椴木 单板 紫外光 光变色 全反射衰减红外光谱 

分 类 号：S781.4[农业科学—木材科学与技术]