林产化学与工业2000，Vol.20Issue(3)：51-59,9.
木质素化学改性抑制杨木碱性过氧化氢机械浆返色的研究
CHEMICAL MODIFICATION OF LIGNIN IN POPLAR APMP PULPS TO PREVENT LIGHT INDUCED YELLOWING
房桂干 1Alain,C2
作者信息
- 1. 中国林业科学研究院制浆造纸研究开发中心,江苏南京,210042
- 2. 法国波尔多大学,波尔多F-33405
- 折叠
摘要
Abstract
Different brightness level s of poplar APMP pulps were prepared in a pilot scale system by alkaline peroxide mechanical pulping process, Un-treated and reduced pulps(borohydride reduction)were modified by acetic anhydride under different conditions, such as in aqueous, organic solvents and gaseous phases.The brightness of pulps before and after UV-light exposure for different periods were measured on handsheets, post-colour number and BSE (brightness stabilizing effect)were used to evaluate the photo -stability of the treated pulps. The results show that, both gaseous and organic phase acetylations improve pulps brightness stability more or less depending on am ount of acetic anhydride applied and reaction time I. E. Degree of acetylation. Co mpletely stabilized pulps were obtained by thorough acetylation.Form UV diffuse reflectance spectra, it seems that carbonyl and phenolic groups mainly contribute to the light-induced yellowing of poplar APMP. Sodium borohydride/so dium bisulfite mixture treatment of pulps followed by gaseous phase acetylation on paper sheet was proposed to be one of the practical process for yellowing inhibition of bleached APMP pulps.关键词
杨木/碱性过氧化氢机械浆/光诱导返黄/乙酰化/白度稳定性Key words
poplar/APMP/light-induced yellowing/acetylation/brightness stability分类
轻工纺织引用本文复制引用
房桂干,Alain,C..木质素化学改性抑制杨木碱性过氧化氢机械浆返色的研究[J].林产化学与工业,2000,20(3):51-59,9.
