文献类型：期刊文献

中文题名：慈竹CTMP制浆漂白过程研究

英文题名：Study on CTMP Pulping and Bleaching Process of Neosinocalamus Affinis

作者：梁芳敏[1,2] 房桂干[1,2] 焦健[1,2] 邓拥军[1,2] 解存欣[1,2] 韩善明[1,2] 李红斌[1,2]

第一作者：梁芳敏

机构：[1]中国林业科学研究院林产化学工业研究所,江苏省生物质能源与材料重点实验室,国家林业局林产化学工程重点开放性实验室,生物质化学利用国家工程实验室,江苏南京210042;[2]南京林业大学林业资源高效加工利用协同创新中心,江苏南京210037

年份：2019

卷号：38

期号：2

起止页码：20-25

中文期刊名：造纸科学与技术

外文期刊名：Paper Science & Technology

收录：CSTPCD

基金：国家重点研发计划(2017YFD0601005);团队建设创新工程(LHSXKQ8)

语种：中文

中文关键词：慈竹;化机浆;过氧化氢;漂白

外文关键词：neosinocalamus affinis;chemo-mechanical pulp;hydrogen peroxide;bleaching

分类号：TS74

摘要：慈竹原料加权平均长度为1.68mm,平均宽度17.5μm,长宽比为96。综纤维素含量72.93%,木素含量26.81%,戊糖含量1&99%,苯醇抽出物含量2.12%,可以作为木材的替代原料。经制浆漂白(20%H,02)后木素与苯醇抽出物的溶出率分别为45.4%、51.4%。慈竹木素属于GSH型,其中愈疮木基、紫丁香基、对務基苯基结构单分别为38.4%、32.6%、29.0%,非缩合型结构单元得率为66.2%0制浆漂白过程中,主要是水解溶出部分与酯键连接的H单元。UV-Vis光谱分析显示,H2O2对木质素发色结构中370-385nm处与苯环共铤的α-羰基结构、苯环连接的γ-醛基结构以及400nm^500nm处醍.型结构有持续的破坏作用,但H2O2用量由10%增加至20%时,对木素中某些醍,型结构的破坏困难,这可能是竹材化机浆难以漂白至较高白度的一个主要原因。
The bamboo can be used as an alternative raw material for wood and parameters of bamboo fibers are 1. 68 mm of average length weighted, 17.5 μm of width, 96 of length-width ratio, 72. 93% of holocellulose, 1&99% of pentose, 26. 44% of lignin, 2. 12% of benzene-alcohol.. After mechanical pulping and bleaching with 20% H2O2 , dissolution rates of lignin and benzene-alcohol extract were 45. 4% and 51.4% respectively. The lignin structure of the bamboo species belong to the G-S-H type, among of which G takes up 32. 6%, S accounts for 3& 4%, H contributs to 29. 0%, yield of non-condensing structural elements is 66. 2%. The H unit connected with ester bond is mainly dissolved part during mechanical pulping and bleaching process. The UV-Vis results showed that H2O2 had a persistent destructive effect on chromatic structures of the a-carbonyl group conjugated with benzene ring and γ-aldehyde group connected with benzene ring that absorb light in the region of 370 nm^385 nm and quinoid structure that absorb light in the region of 400 nm^500 nm. With the increasing of the hydrogen peroxide usage, it is difficult to destroy quinoid structures in lignin, which may be one of the main reasons for the difficulty in bleaching bamboo chemical pulp to a higher brightness.