Evolution of extractive composition in thermally modified Scots pine during artificial weathering
Evolution of extractive composition in thermally modified Scots pine during artificial weathering
复制标题
人工风化过程中热改性樟子松提取物成分的演变
DOI：
10.1515/hf-2018-0216
复制
发表时间：
2019-03
期刊：
影响因子：
2.4
通讯作者：
Zhang Liangliang
中科院分区：
文献类型：
--
作者：
Shen Haiying;Xu Jiaqi;Cao Jinzhen;Jiang Jun;Zhang Shaodi;Xue Jing;Zhang Liangliang
摘要为了阐明热改性木材在自然老化过程中抽出物的变化规律和作用，采用气相色谱-质谱联用仪（GC-MS）分析了热改性樟子松丙酮抽出物在加速老化试验机中不同时间的组成。风化热改性樟子松的抽提物主要为脂肪酸和酚类物质，还含有糖、萜烯和醇类物质。随着风化进程的进行，脂肪酸含量显著降低，酚类含量显著增加。据推测，脂肪酸的减少甚至消除是一个物理过程，即木材在暴露于辐射和升高的温度期间的排放。酚类抽出物的增加主要是由于其他木材组分的光降解。酚类降解产物对热改性木材的进一步光降解起着“屏障”的作用，其中香草醛或其衍生物是最主要和最重要的降解产物。
Abstract In order to clarify the evolution and role of extractives in thermally modified wood during the process of weathering, the compositions of acetone extractives from thermally modified Scots pine after exposure in an accelerated weathering tester for different durations were determined using gas chromatography-mass spectrometry (GC-MS). Fatty acids and phenolics were proved to be the main types of extractives in weathered thermally modified Scots pine, and some sugars, terpenes and alcohols were also collected. With the progress of weathering, the content of fatty acids decreases significantly while that of phenolics increases. The reduction or even elimination of the fatty acids is presumed to be a physical process, namely, a discharge from wood during exposure to radiation and elevated temperature. The increase of phenolic extractives is mainly due to the photodegradation of other wood components. Phenolic degradation products play the role as a “barrier” against further photodegradation of thermally modified wood, among which vanillin or its derivatives appeared to be the most predominant and important ones.
登录
查看更多内容
影响因子：
1.5
作者：
Chuanshuang Hu;Guifen Jiang;Jianhui Zhou;Min Xiao;Z. Yi
通讯作者：
Chuanshuang Hu;Guifen Jiang;Jianhui Zhou;Min Xiao;Z. Yi
DOI：
--
发表时间：
1997
期刊：
Appita Journal
影响因子：
--
作者：
A. Wallis;R. H. Wearne
通讯作者：
A. Wallis;R. H. Wearne
影响因子：
4.5
作者：
M. Kymäläinen;Selim Ben Mlouka;T. Belt;V. Merk;Ville Liljeström;T. Hänninen;Tuuli Uimonen;M. Kostiainen;Lauri Rautkari
通讯作者：
M. Kymäläinen;Selim Ben Mlouka;T. Belt;V. Merk;Ville Liljeström;T. Hänninen;Tuuli Uimonen;M. Kostiainen;Lauri Rautkari
影响因子：
5.9
作者：
George, B;Suttie, E;Deglise, X
通讯作者：
Deglise, X
影响因子：
3
作者：
D. Hon
通讯作者：
D. Hon