活性炭纤维湿氧化改性表面含氧官能团的变化规律  

Effect of wet oxidized modification on oxygen-containing functional groups of activated carbon fibers

作　　者：张登峰[1] 鹿雯[1] 王盼盼[1] 杨丽莉[1] 李晨曦[1] 曾向东[1] 

机构地区：[1]昆明理工大学环境科学与工程学院,云南昆明650093

出　　处：《煤炭学报》2008年第4期439-443,共5页Journal of China Coal Society

基　　金：云南省自然科学基金资助项目(2004B0012M)

摘　　要：根据Boehm滴定方法,测定了不同双氧水浸渍浓度、浸渍pH和浸渍时间条件下制备的改性黏胶基活性炭纤维表面3种主要含氧官能团含量,得出了含氧官能团随浸渍浓度、pH和时间的变化规律;利用TG/DTA分析技术表征了改性前后样品表面的含氧官能团及其稳定性.研究表明,改性后活性炭纤维表面含氧官能团含量均有不同程度的增长,3种官能团总量最高达到2.401 mmol/g;浸渍浓度对含氧官能团含量影响最大,pH次之,时间影响最小;热分析结果证实,相比原样而言,改性样品表面含有更多类型和数量丰富的含氧官能团.An investigation was made into the influence of impregnated concertration, pH and time on the amount of oxygen-containing functional groups of the modified viscose activated carbon fibers ; according to Boehm＇ s titration method, the amounts of three kinds of oxygen-containing functional groups of activated carbon fibers modified under three different ingredients including the impregnated concentration, pH and time of H2O2 were characterized; the amount and stability of oxygen-containing functional groups of original and modified samples were analyzed by TG/DTA analysis. The results indicate that the amount of oxygen-containing functional groups of the modified samples increase variously, the maximum amount of the total three functional groups is 2. 401 mmol/g, the influence of impregnated concentration on the amount of oxygen-containing functional groups is the most evident, next is pH and the influence of time is the most indistinct ; the thermal analysis shows that the category and amount of oxygen-containing functional groups of the modified sample is more abundant than the original sample.

关 键 词：黏胶基活性炭纤维 湿氧化 含氧官能团 双氧水 

分 类 号：TQ536.2[化学工程—煤化学工程]