CAJ | 학술논문

研究了纸浆臭氧漂白过程中，木素和乙烯糖醛酸的存在对纤维素上羰基的形成及纤维素降解的影响。在碱抽提段（E），采用CCOA方法｛以咔唑-9-羧酸[2-(2-氨基氧杂乙氧基)-乙氧基]酰胺作为羰基的选择性荧光标记物｝对纸浆中的羰基进行跟踪检测。研究表明：在臭氧漂白过程中，己烯糖醛酸、木素与臭氧反应形成的自由基导致纤维素和半纤维素上形成羰基并致使纤维素降解。此外，还发现羰基的总量在E段有所下降，但在随后P段，当H2O2不够稳定的时候又会有所增加。最后，提出了几种有助于减少羰基形成的方法。
연구료지장취양표백과정중，목소화을희당철산적존재대섬유소상탄기적형성급섬유소강해적영향。재감추제단（E），채용CCOA방법｛이잡서-9-최산[2-(2-안기양잡을양기)-을양기]선알작위탄기적선택성형광표기물｝대지장중적탄기진행근종검측。연구표명：재취양표백과정중，기희당철산、목소여취양반응형성적자유기도치섬유소화반섬유소상형성탄기병치사섬유소강해。차외，환발현탄기적총량재E단유소하강，단재수후P단，당H2O2불구은정적시후우회유소증가。최후，제출료궤충유조우감소탄기형성적방법。
The formation of carbonyl groups during the ozone treatment (Z) of eucalyptus (EucalyptusgrandisandEucalyptus urophylla hybrid) kraft pulps and their behaviors during subsequent alkaline stages were investigated by the CCOA method with carbazole-9-carboxylic acid [2-(2-aminooxethoxy)-ethoxy] amide (CCOA) as the carbonyl-selective fluorescence label. Several pulp samples with or without lignin and hexenuronic acid (HexA) were used to elucidate the effects of these components when present in unbleached kraft pulp. Both HexA and lignin increased the formation of carbonyl groups on cellulose and hemicellulose during ozonation. It was concluded that radicals are likely formed when ozone reacts with either lignin or HexA. These carbonyl groups were involved in cellulose depolymerization during subsequent alkaline extraction stages with sodium hydroxide (E) and alkaline hydrogen peroxide (P, in ZEP or ZP). Their numbers decreased after E but increased during P when H2O2 was not stabilized enough. Several ways to minimize the occurrence of carbonyl group formation are suggested.