DISCOLOURATION OF DIOXANE LIGNIN ISOLATED FROM OAK WOOD (QUERCUS ROBUR L.) AND SWEET CHERRY WOOD (PRUNUS AVIUM L.) IRRADIATED WITH VARIOUS LIGHT SOURCES

被引：0
|
作者：
Nowaczyk-Organista, Magdalena [1 ]
Pradzynski, Wlodzimierz [2 ]
机构：
[1] Wood Technol Inst, PL-60654 Poznan, Poland
[2] Univ Life Sci, Inst Chem Wood Technol, PL-60637 Poznan, Poland
来源：
WOOD RESEARCH | 2012年 / 57卷 / 04期
关键词：
Light-induced discolouration; ultraviolet and visible light; oak; sweet cherry; dioxane lignin; PHOTODEGRADATION;
D O I：
暂无
中图分类号：
TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];
学科分类号：
0805 ; 080502 ; 0822 ;
摘要：
Wood colour stability is relevant for the final use of this material. The differences in light-induced discolouration among various wood species were studied on an example of two different species oak wood and sweet cherry wood. To understand the causes of these differences, experiments were carried out on dioxane lignin isolated from these two species. The investigated specimens were exposed to ultraviolet (UV), ultraviolet/ visible (UV/VIS) and visible (VIS) light. The measurements were carried out by colorimetric method, using CIE Lab system, the values of colour coordinates were recorded before the irradiation and after 100 hours of light exposure. The results indicate that, apart from lignin, other wood components such as extraction substances play role in colour changes in the two investigated wood species.
引用
收藏
页码：515 / 522
页数：8
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