木材和染色木材光变色的研究进展

Progress of Study on Photo-induced Discoloration of Wood and Dyed Wood

在一定温湿度条件下,木材和染色木材结构中共轭双键能够吸收太阳光中近紫外部分,使其表面发生光物理化学反应,并伴随自由基浓度的变化。总结了国内外木材及染色木材光变色的研究现状,阐述了木材化学组分、光辐射、表面自由基及其它大气环境因素对光变色的影响;在分析木材光变色的基础上探讨了染料化学性质和染色工艺对染色木材光变色的影响,并提出了木材及染色木材光变色研究的方向。

Under certain conditions of temperature and humidity, dyed wood as well as wood will undergo some chemical-physical reactions while the conjugated double bonds absorb ultraviolet part of sunlight, the reactions always happen with change of surface radical concentration. The domestic and foreign researches are summarized and the subject from following factors are discussed,including chemical structure of wood composites, free radicals on wood surface, light irradiation and other atmosphere influences. The characteristics of dye and technology of dying are discussed while analyzing the discoloration of dyed wood. Finally, some advice for further research in discoloration of wood and dyed wood is figured out.