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对经碱性H2O2漂白以及NaBH4还原处理后麦草化学机械浆的木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。
The lignin structure of wheat straw chemical mechanical pulp after alkaline H2O2 bleaching and NaBH4 reduction was studied. The results showed that the total carbonyl content decreased by 26.4% after alkaline H2O2 bleaching, and the amount of conjugated carbonyl in lignin decreased by 70.0% after NaBH4 reduction. The bleaching destroys the chromophore in lignin.