ESCA study of oxidized wood surfaces
ESCA study of oxidized wood surfaces
复制标题
DOI：
10.1002/app.1984.070290908
复制
发表时间：
1984-09
影响因子：
3
通讯作者：
D. Hon
中科院分区：
文献类型：
--
作者：
D. Hon
对暴露在室外风化和紫外线照射下的木材表面的初步研究结果表明，ESCA提供了有价值的信息和对风化和光氧化表现的洞察。从ESCA谱可以看出，木材表面的碳氧键和氧碳氧键(或不饱和碳氧键)和氧碳比的信号强度增加，碳碳键和碳氢键的信号强度降低，说明木材表面被氧化了。然而，这只是一种表面效果。在裸露的木材表面下，只观察到100微米处的缓慢氧化。氧碳比数据表明，风化木材表面富含纤维素，贫木质素。风化木材表面的淋溶降解产物是造成紫外线照射和风化木材表面ESCA线形差异的主要原因。
Results of a preliminary study of the surface of wood exposed to outdoor weathering as well as to UV irradiation showed that ESCA provides valuable information and insight into the manifestation of weathering and photooxidation. From the ESCA spectra, the increase in signal intensities of carbon-oxygen bonds and oxygen-carbon-oxygen bonds (or unsaturated carbon oxygen bond) and oxygen-to-carbon ratio, and the decrease in carbon-carbon and carbon-hydrogen bonds of weathered and UV-irradiated wood surfaces suggested that wood surface was oxidized. Nevertheless, it was a superficial effect. Only a slow oxidation was observed at 100 ..mu..m under the exposed wood surfaces. From the oxygen-to-carbon ratio data, it revealed that weathered wood surface was rich in cellulose, poor in lignin. The leached-away degradation products from weathered wood surface accounted for the discrepancy between the ESCA line shapes of UV-irradiated and weathered wood surfaces.