摘要
简述了3种纸浆光催化漂白的脱木素机理,并以基于光敏剂产生单线态氧机理的光催化漂白为例,对硫酸盐竹浆进行了实验。实验结果表明,随着光催化漂白时间的增加,漂后浆的白度上升,KMnO4值和黏度下降。紫外与红外光谱分析表明:光催化漂白过程中,木素的芳环可能发生开环,部分醚键断裂,苯基丙烷结构断裂,导致木素降解;纸浆中碳水化合物也有部分降解。
The delignification mechanisms of three different kinds of photocatalysis bleaching of pulp were briefly reviewed in this paper. An experiment of bamboo kraft pulp sing, let oxygen bleaching through sensitizer at irradiation was carried out. The experiment results indicated that with the increasing of photocatalysis bleaching time, the brightness is increasing, the KMnO4 value is falling, and the viscosity of the pulp is decreasing continuously. UV/Vis and FTIR spectroscopes indicated that the degradation of lignin is induced by the opening of aromatic ring and the cleavage of some ether linkage and phenylpropane structures during the photocatalysis bleaching; moreover, carbohydrate of the oulo is degraded partially.
出处
《中国造纸学报》
EI
CAS
CSCD
2006年第1期18-21,共4页
Transactions of China Pulp and Paper
关键词
硫酸盐竹浆
光催化漂白
单线态氧
脱木素机理
bamboo KP
photocatalysis bleaching
singlet oxygen
delignification mechanism
