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摘要
以聚丙烯腈(PAN)预氧丝为原料,采用CO2直接活化法,制备了PAN基活性炭纤维,并通过液压成型方式将PAN基活性炭纤维制成滤材。通过氮吸附、SEM和XPS对制得的PAN基活性炭纤维进行表征。利用自搭建的吸附性能测试系统,将PAN基滤材和以相同成型方法制成的粘胶基滤材进行苯、甲苯的吸附测试。结果表明,自制的PAN基活性炭纤维比表面积为860m2/g,总孔容积为0.361m3/g,最可几孔径为0.62nm,官能团为羟基、醚基、羧基、酯基和类吡啶基团。PAN基滤材单位表面积对苯和甲苯的饱和吸附量均大于粘胶基滤材,其吸附活性位比粘胶基滤材多,更适合用来吸附苯系污染物。
Abstract
Polyacrylonitrile (PAN)-based activated carbon fibers were prepared by CO2 direct activation.The microfiber structured filter was prepared by wet forming process with PAN-based ACF fiber.The properties of PACF were measured by N2 adsorption,BET method,scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS).The adsorption performance of PAN-based filter and the viscose rayon-based filter on the benzene series gas were studied by using the self-built adsorption system.The results showed that the total specific surface area of PACF prepared under the optimum conditions reached 860m2/g,the total pore volume was 0.361m3/g,the most probable pore size was 0.62nm,PACF mainly consisted of hydroxyl,ether,carboxyl,ester and pyridine groups.The saturated adsorption capacities per unit surface area of PAN-based filter on benzene and toluene were higher than those of viscose rayon-based filter,indicating that PAN-based filter had more active sites per square meter than viscose rayon-based filter,and would be more suitable material for the adsorption of benzene series compounds.
关键词
聚丙烯腈基活性炭纤维
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CO2
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苯
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甲苯
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粘胶基活性炭纤维
Key words
polyacrylonitrile-based activated carbon fiber
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carbon dioxide
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benzene
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toluene
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viscose rayon-based activated carbon fiber
CO2直接活化法制备PAN基活性炭纤维及其对苯系气体吸附性能的研究[J].
化工新型材料, 2018, 46(2): 87-90 DOI:
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基金资助
国家自然科学基金(21476172、21206124);天津市自然科学基金重点项目(12JCZDJC28400);天津市科技计划项目(15PTSYJC00230);天津市科技特派员项目(16JCTPJC47600)
