中文摘要：

采用GPC、FT-IR、^1H-NMR、^31P-NMR和元素分析法研究了竹浆Co-salen仿酶漂白过程中残余木素结构的变化。Co-salen仿酶处理使竹浆巾残余木素芳环降解开裂，甲氧基、酚羟基、脂肪族羟基、愈创木基、紫丁香基减少，羟基被氧化，羰基增加。β-O-4、β-1、β-5、β-β连接发生断裂。残余木素重均、数均分子质量下降，多分散性略有下降。Co-salen仿酶预处理使终漂纸浆发色基团减少，结晶度提高。另外得到了仿酶处理前后竹浆残余木素结构单元实验式。

英文摘要：

The structural change of residual lignin of bamboo pulp in Co-salen biomimetic bleaching was studied with GPC, FT-IR, ^1H-NMR,^31P-NMR and element analysis. It was found that the methoxyl group, phenolic hydroxyl group, aliphatic hydroxyl group, guaiacyl and syringyl reduced; the content of carbonyl group increased; the aromatic ring was opened, the linkages of β-O-4,β-1,β-5 and β-β were cleaved, the molecular weight of residual lignin decreased. The chromophore of the bleached pulp with Co-salen biomimetic pretreatment reduced and its crystallinity increased. The experimental formulas （C9） of the residual lignin of the bamboo pulp before and after biomimetic treatment were also obtained.