竹浆GIF仿酶漂白木质素降解产物气相色谱-质谱解析  

Interpretation on Degraded Products of Lignin during GIF Biomimetic Bleaching of Bamboo Pulp by GC-MS

作　　者：贾艳迪[1] 周学飞[1,2] 朱正良[1] 

机构地区：[1]昆明理工大学云南省高校制浆造纸工程研究中心,云南昆明650224 [2]华南理工大学制浆造纸工程国家重点实验室,广东广州510641

出　　处：《林产化学与工业》2008年第5期93-99,共7页Chemistry and Industry of Forest Products

基　　金：国家自然科学基金(20766002);云南省自然科学基金(2005B0014M);云南省教育厅科学研究基金(5Y0681D);华南理工大学制浆造纸工程国家重点实验室科学基金(无编号);山东轻工业学院制浆造纸科学与技术省部共建教育部重点实验室开放基金(无编号);昆明理工大学分析测试基金重点项目(无编号)

摘　　要：利用气相色谱-质谱联用(GC-MS)方法对G IF仿酶漂白中的木质素降解产物进行了分析,进一步探讨这种仿酶系统对木质素的降解机制。结果显示G IF仿酶处理使竹浆残余木质素进一步氧化降解,降解的主要方式有脱甲基作用、醌型结构的产生和开环、烷基-芳基醚键的开裂、侧链碳-碳连接的氧化断裂等。GC-MS检测所得的降解产物中,含羰基的化合物较多,这是G IF仿酶系统催化氧化的结果。一些醌式结构、共轭羰基和酚类的脱除,也使纸浆因发色基团减少而白度提高。此外,检测出一些糖类降解产物,说明G IF仿酶系统对纸浆碳水化合物有一定的降解作用。The degraded products of lignin were identified by gas chromatography-mass spectrometry （GC-MS） during GIF biomi- metic bleaching of bamboo pulp to explore lignin degradation mechanism. The results showed that residual lignin was further degraded by GIF biomimetic system. The main ways of lignin degradation were involved with demethylation, formation and opening of quinone-type structures, cleavages of alkyl-aryl ether bond and carbon-carbon linkage in side-chain. The degraded products contained much carbonyl compounds, which was the result of catalytic oxidation in GIF biomimetic system. The pulp brightness was improved because of the removals of some quinone-type structures, conjugated carbonyl and phenolic compounds. Some carbohydrate-degraded products were also detected out by GC-MS.

关 键 词：竹浆 GIF 仿酶漂白 木质素降解产物 气相色谱-质谱 

分 类 号：TQ351.377[化学工程]