活性炭纤维的改性及其微孔结构  

Surface modification and porous structure analysis of activated carbon fibers

作　　者：余纯丽[1] 任建敏[1] 傅敏[1] 王瑞琪[1] 彭怡[1] 谭雪梅[1] 

机构地区：[1]重庆工商大学环境与生物工程学院,重庆400067

出　　处：《环境科学学报》2008年第4期714-719,共6页Acta Scientiae Circumstantiae

基　　金：重庆市科技攻关基金项目(NoCSTC;2005AB7030-03);重庆市教委科学技术项目(NoKJ070703)~~

摘　　要：采用微波辐射、硝酸回流、微波-硝酸处理和氢氧化钠水溶液浸渍改性了粘胶基活性炭纤维,并对其改性机制进行了探讨.利用氮吸附对改性活性炭纤维的孔隙结构进行了表征.结果表明,除碱改性活性炭纤维外,其余改性活性炭纤维的BET表面积增加、微孔容量增大、对氮气的亲和力增强,而且微波辐射改性可使活性碳BET表面积大大增加.活性炭纤维表面呈双重分维特征.The viscose-based activated carbon fiber （ACF） are modified activated carbon fiber by microwave radiation, refluxing with nitric acid , microwave radiation-refluxing with nitric acid and alkaline treatment. The corresponding modification mechanisms are explored. The pore distribution is analyzed through the adsorption isotherms of nitrogen. It is found that the specific surface area and the microvolume are increased and the affinity of adsorbent surface for nitrogen is enforced for all the modified ACF except the modified activate carbon with alkali. Microwave radiation is proved to be a simple method to increase the surface area. It is found that the surface fractal dimensions of modified activate carbon are double.

关 键 词：活性炭纤维(ACF) 吸附等温线 微孔结构 分形 

分 类 号：X13[环境科学与工程—环境科学]