Heat- and Light-Induced Aging Characteristics of ECF Bleached Kraft Pulps
INTRODUCTION In conforming to strict environmental regulations in different countries, kraft pulps worldwide are increasingly bleached with either elemental chlorine-free (ECF) or totally chlorine-free (TCF) sequences. However, a drawback of the chlorine-free bleached pulps is their strong brightness reversion when they are exposed to heat or light, it is necessary to understand the durability of the ECF-bleached pulp, because a large amount of the pulp can be utilized for commercial papers. The brightness reversion of the ECF-bleached pulp, often referred to as pulp yellowing, is caused by 5-hydroxymethyl-2-furaldehyde formed in a cellulose matrix after accelerated aging with either heat or light. It was reported that 2-furancarboxylic acid and 5-formyl-2-furoic acid were generated by the hydrolysis of hexenuronic acid.
Takayuki Okayama Daisuke Kobayashi Hailan Jin
Faculty of Agriculture, Tokyo University of Agriculture and Technology, Japan
国际会议
International Symposium on Wood Science and Technology(IAWPS 2008)(国际木材产品学会联合会2008学术研讨会)
哈尔滨
英文
325-326
2008-09-27（万方平台首次上网日期，不代表论文的发表时间）