Comparative adsorption study on carbons from polymer precursors
Comparative adsorption study on carbons from polymer precursors
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DOI：
10.1016/s0008-6223(00)00038-5
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发表时间：
2000-01-01
期刊：
影响因子：
10.9
通讯作者：
Nagy, LG
中科院分区：
文献类型：
--
作者：
László, K;Bóta, A;Nagy, LG
在三种基本不同的聚合物，即聚丙烯腈，聚对苯二甲酸乙二醇酯和纤维素的情况下，前体聚合物对热解炭和活性炭的氮吸附性能，孔径分布和亲水/疏水特性的影响进行了研究。热解样品由这些聚合物制成，并在900摄氏度下通过蒸汽活化。在50%烧除之后，孔体积和比表面积显著增加，并且孔径分布由热解炭（即起始聚合物）的孔径分布决定。从聚丙烯腈衍生的活化样品是微孔的，而其他两种碳含有微孔和中孔。活化产生的孔隙同样适用于甲醇和苯，并且在所有三种聚合物中，异质表面变得更加亲苯。N含量对所研究的表面性质的影响有限。(C)2000爱思唯尔科技有限公司版权所有。
The effect of the precursor polymer on nitrogen adsorption properties, pore size distribution and the hydrophilic/hydrophobic character of both the pyrolyzed char and the activated carbon was studied in the case of three basically different polymers, i.e. polyacrylonitrile, polyethyleneterephthalate and cellulose. Pyrolyzed samples were produced from these polymers and activated by steam at 900 degrees C. After a 50% burn-off, the pore volume and the specific surface area increase significantly and the pore size distribution is determined by that of the pyrolyzed char, i.e. the starting polymer. The activated sample derived from polyacrylonitrile is microporous, while the other two carbons contain both micro- and mesopores. Activation creates pores which are equally available for methanol and benzene and the heterogeneous surfaces become more benzophilic in all three polymers. The N-content has limited effect on the surface properties studied. (C) 2000 Elsevier Science Ltd. All rights reserved.