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林产化学与工业

林产化学与工业 ›› 2003, Vol. 23 ›› Issue (3): 28-32.

• 研究报告 • 上一篇    下一篇

微波等离子体处理木材表面接枝甲基丙烯酸甲酯的XPS分析

杨忠1, 杜官本2, 黄林荣2, 张华2   

  1. 1. 中国林业科学研究院 木材工业研究所, 北京 100091;2. 西南林学院 木质科学与装饰工程学院, 云南 昆明 650224
  • 收稿日期:2002-12-05 修回日期:1900-01-01 出版日期:2003-09-30 发布日期:2003-09-30

STUDY ON GRAFT COPOLYMERIZATION OF METHYL METHACRYLATE ONTO WOOD SURFACE AFTER MICROWAVE PLASMA TREATMENT BY XPS

YANG Zhong1, DU Guan-ben2, HUANG Lin-rong2, ZHANG Hua2   

  1. 1. Research Institute of Wood Industry, CAF, Beijing 100091, China;2. Department ofWood Science and Technology, Southwest Forestry College, Kunming 650224, China
  • Received:2002-12-05 Revised:1900-01-01 Online:2003-09-30 Published:2003-09-30

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摘要： 应用X-射线光电子能谱(XPS)技术,对微波等离子体引发木材与甲基丙烯酸甲酯(MMA)发生接枝共聚反应前后的木材表面结构及物理化学特性进行了分析。分析表明:1)微波等离子体处理使木材表面O/C原子比增加,C1含量降低,而C2、C3含量增加,并有C4峰的出现,这表明经微波等离子体处理后木材表面产生了大量的含氧官能团或过氧化物;2)微波等离子体接枝材表面的O/C比有所增加,但介于素材与微波等离子体处理材之间,C1s谱峰主要变化是强C4峰的出现,这表明木材表面产生了大量的O-C=O官能团;3)微波等离子体接枝材的O1/O2值基本接近1,大于素材(0.11)和微波等离子体处理材(0.21)的值,说明接枝材表面的C=O含量大幅度增大。以上结果表明木材表面接枝上了大量的MMA分子。

关键词: 微波等离子体, 西南桤木, 接枝共聚, 甲基丙烯酸甲酯, X-射线光电子能谱

Abstract: Surface structure and properties of the untreated, treated and grafted wood were analyzed by X-ray photo electron spectroscopy(XPS).XPS spectra showed that:1)Microwave plasma treatment increased the O/C atomic ratio of the wood surface, diminished C1(carbon bonded to carbon and/or hydrogen), increased C2(carbon bonded to a single oxygen) and C3(carbon bonded to two non carbonyl oxygen or to a carbonyl oxygen), and generated C4(carbon bonded to a carbonyl and a non carbonyl oxygen).These results suggest that a great deal of oxygenated groups or peroxides were generated on wood surface after microwave plasma(MWP) treatment; 2)The O/C ratio of the grafted wood by MWP initiation was higher than that of untreated wood, but lower than that of treated wood by MWP;the main changes of C1s spectral peak of grafted wood were the generation of C4 intense peak, suggesting the generation of a good deal of O-C=O groups on wood surface; 3)The O1/O2 ratio of the grafted wood is about 1, higher than that of the untreated wood and treated wood by MWP, showing the considerable increase of C=O content in grafted wood.These results showed that a great deal of methyl methacrylate(MMA) molecules were grafted onto wood surface.

Key words: microwave plasma, Alnus nepalensis D.Don, graft polymerization, methyl methacrylate, X-ray photoelectron spectroscopy

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