CAJ | 학술논문

对三倍体毛白杨KP纸浆进行了OQP全无氯漂白,漂白后纸浆白度达到82%ISO。采用酶-弱酸解两段法分别从KP纸浆、氧脱木素后KP纸浆和过氧化氢漂白后KP纸浆中分离纸浆残余木素。通过凝胶渗透色谱（GPC）对以上木素试样分别进行检测,得出各木素样品的平均相对分子质量及其分布,总结了OQP漂白中相对分子质量的变化规律。通过磷谱核磁共振31P-NMR技术分别得出木素谱图,对所有木素样品中各官能团进行了定量分析及对比,分析了木素结构在KP纸浆TCF漂白过程中的变化规律。
대삼배체모백양KP지장진행료OQP전무록표백,표백후지장백도체도82%ISO。채용매-약산해량단법분별종KP지장、양탈목소후KP지장화과양화경표백후KP지장중분리지장잔여목소。통과응효삼투색보（GPC）대이상목소시양분별진행검측,득출각목소양품적평균상대분자질량급기분포,총결료OQP표백중상대분자질량적변화규률。통과린보핵자공진31P-NMR기술분별득출목소보도,대소유목소양품중각관능단진행료정량분석급대비,분석료목소결구재KP지장TCF표백과정중적변화규률。
The kraft pulp of the triploid of polulus tomentosa was obtained and pretreated.Then the TCF bleaching process of OQP was carried out.The brightness of the bleached pulp reached 82%ISO.The two-stage method was applied to isolate the residual lignin samples from kraft pulps before bleaching,kraft pulps after oxygen deliginification stage and kraft pulps after preroxide bleaching stage,respectively.The lignin samples were determined by gel permeation chromatography.The changes of molecular weight distributions,the number-average and weight-average molecular weights during TCF bleaching were analyzed and compared.The 31P-NMR spectra of all the lignin samples were obtained.The functional groups within lignin were quantitatively analyzed and compared to discover the rules of lignin structural changes during the TCF bleaching process.