压力过氧化氢漂白过程中羟基自由基的研究  

Research on Hydroxyl Radicals during Pressurized H_2O_2 Bleaching of Alkaline Reed Pulp

作　　者：邱玉桂[1,2] 陈春霞 欧海龙 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510640 [2]国家纸制品质量监督检验中心,广东东莞523808

出　　处：《中国造纸学报》2009年第4期27-31,共5页Transactions of China Pulp and Paper

基　　金：国家自然科学基金(29876012);广东省自然科学基金(980596)资助项目

摘　　要：用化学荧光法研究碱法苇浆压力过氧化氢漂白过程中羟基自由基的浓度变化及其对漂白效果的影响。结果表明,应用邻苯二甲酰肼(即PtH)捕集羟基自由基、再经荧光法测定是可行的。漂白实验所选用的4个漂白体系的羟基自由基浓度变化规律相似,在漂白时间40 min左右时,羟基自由基的相对浓度出现一个峰值,90 min时其相对浓度都有不同程度的回升。羟基自由基的浓度变化及其对漂白效果的影响具有较明显的规律性。This paper mainly studies the concentration change of hydroxyl radicals and its effect on the bleaching result during pressurized hydrogen peroxide bleaching of alkaline reed pulp by means of Chemiluminescence（CL）.The results showed that under the experimental conditions,CL is an excellent method for elucidating the role of hydroxyl radicals in bleaching systems,and the changing law of the concentration of hydroxyl radicals is similar among those four bleaching systems of reed pulp.There exists a peak value at 40 min and the concentration of hydroxyl radicals will rebound at 90 min.There is an obvious regularity in the variation of hydroxyl radical concentration and its effect on bleaching efficiency under the experimental conditions.

关 键 词：碱法苇浆 压力过氧化氢漂白 化学荧光法 邻苯二甲酰肼 羟基自由基 

分 类 号：TS745[轻工技术与工程—制浆造纸工程]