棕榈基活性碳纤维的制备与孔结构表征  

Preparation and pore characterization of windmill palm-based activated carbon fibers

作　　者：李超[1,2] 吕晓光[1,2] 林剑[1,2] 赵广杰[1,2] 

机构地区：[1]北京林业大学材料科学与技术学院,北京100083 [2]北京林业大学木质材料科学与应用教育部重点实验室,北京100083

出　　处：《中国科技论文》2016年第22期2606-2609,2614,共5页China Sciencepaper

基　　金：高等学校博士学科点专项科研基金资助项目(20130014130001)

摘　　要：为高值化利用棕榈纤维,以磷酸为活化剂,在不同磷酸浓度和活化时间条件下制备棕榈基活性碳纤维(activated carbon fiber,ACFs)。通过扫描电镜、氮气吸附-脱附、压汞法对其孔结构进行表征。结果表明:随着活化剂磷酸浓度的增加、活化时间的延长,棕榈纤维表面形成局部塌陷,引起组织结构破坏,产率降低;增加活化剂磷酸浓度,生成的ACFs中孔含量减少,但有利于微孔的产生;延长活化时间有助于提高ACFs中孔孔隙的形成和比表面积的增加,但会影响微孔含量。因此,棕榈纤维可成为制备活性碳纤维的众多原料之一。In order to value-added utilize the windmill palm（WP）fibers,activated carbon fibers（ACFs）were prepared from WP fibers as raw material by chemical activation with phosphoric acid at different concentrations and activation time.The porous structures were characterized through the scanning electron microscopy,nitrogen adsorption-desorption,and mercury intrusion porosimetry.The results indicate that：The ACFs prepared at relatively high concentrations and long activation time present more collapsed surfaces,and lower yields;With increasing concentrations,the mesopore content of ACFs gradually decreases,but it contributes to the generation of micropores;Longer activation time contributes to the formation of mesopores and the increase of mesopore volume,but it influences the volume of micropores.Therefore,WP fibers can be considered as one of the raw materials for ACFs preparation.

关 键 词：活性碳纤维 棕榈纤维 孔结构 吸附性能 

分 类 号：TQ342.742[化学工程—化纤工业]