微波等离子体处理木材表面光电子能谱分析

XPS是固体木材表面组成分析最有效和最灵敏的工具之一。本研究使用XPS研究木材微波等离子体处理前后表面化学组成的变化。经微波等离子体处理后 ,C1的含量降低而C2 、C3含量增加 ,并伴随C4生成 ,表明纤维素和 /或木素上羟基含量的增加。微波等离子体处理还在木材表面引入了N元素 ,推测有亲水的 -NH2 生成。比较了相同工作条件下 ,N2 、O2 及空气等离子体对木材表面化学组成影响 ,结果表明 :O2的影响最显著而N2 最弱 ,氧的影响还存在其特殊性。

X-RAY PHOTOELECTRON SPECTROSCOPIC (XPS) ANALYSIS OF WOOD SURFACE TREATMENT WITH MICROWAVE PLASMA

X ray photoelectron spectroscopic (XPS) is one of the most effective and sensitive tools for the surface analysis of solid wood. This tool was applied to elucidate the verifying of wood surface treated by microwave phasma in this paper. Plasma treatment decreased C 1(carbon bonded to carbon and/or hydrogen) and increased C 2 (carbon bonded to a single oxygen), C 3 (carbon bonded to two non carbonyl oxygen or to a carbonyl oxygen) in XPS Cls spectra, and C 4(carbon bonded to a carbonyl and a non carbonyl oxygen) appeared after plasma treat. This suggested increasing of hydroxyl groups on cellulose and/or lignin by plasma treatment. Appearing of atom N indicated that NH 2 occurred possibly during treatment. Under the same treatment conditions, oxygen plasma was most effective, followed by air and Nitrogen. On the other side, oxygen plasma treatment presented differences with Nitrogen and air.