麦草化学机械浆漂白机理的研究

摘要

对经碱性H2O2漂白以及NaBH4还原处理后麦草化学机械浆的术质素结构进行了分析研究.结果表明,麦草化学机械浆经碱性H2O2漂白后总羰基含量减少了26.4％,后续NaBH4还原处理后木质素中共轭羰基数量又减少了70.0％.漂白破坏了木质素中的发色基团.%Lignin structures in wheat straw materials, its chemi-mechanical pulps, the pulps bleached with alkaline H.,0, and the pulps treated by H2O2/NaBH4 were determined in this paper. The results showed that conjugated carbonyl content in the lignin of Hz02 bleached che-mi -mechanical pulp decreases by 26.4% , conjugated carbonyl in the lignin of the pulp treated by NaBH4 further decreases by 70. 0%. The chroraophore in the lignin is broken by bleaching, which improves the pulp brightness.