mechanism of natural lacquer film-making processes by pyrolysis gas-chromatography/mass spectra |
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mechanism of natural lacquer film-making processes by pyrolysis gas-chromatography/mass spectra 收藏此文 全部作者： 万云洋 miyakoshi tetsuo du yumin 第一作者单位： 中国石油大学(北京) 论文摘要： natural lacquer is a complex mixture and the film-making processes are rather complicated. many mechanisms of it existed but contradicted each other, mainly for lack of a suitable research method. a simple method using pyrolysis gas chromatography/mass spectrometry (py-gc/ms) has been used for characterization of organic coatings. the thermal-sensitive points of lacquer polymers were analyzed and the film-making mechanism was investigated in order to put an insight into it. based on py-gc/ms combined with enzyme-catalyzed products analysis, two-step reaction mechanism, i.e., urushiol or laccol firstly catalyzed by enzymes forming c-c and c-o coupling small oligmers in the first stage, and then radicals mainly proceeding auto-oxidization in the air, was proposed. 关键词： raw lacquer; urushiol; laccases; film-making mechanism; pyrolysis 发表日期： 2008年02月23日 同行评议： （暂时没有） 综合评价：
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