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首页> 外文期刊>Journal of Applied Polymer Science >Effects of the oxidation temperature on the structure and properties of polyacrylonitrile-based activated carbon hollow fiber
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Effects of the oxidation temperature on the structure and properties of polyacrylonitrile-based activated carbon hollow fiber

机译：氧化温度对聚丙烯腈基活性炭中空纤维结构和性能的影响

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Polyacrylonitrile (PAN) hollow fibers were pretreated with ammonium clibasic phosphate, oxidized in air, carbonized in nitrogen, and activated with carbon dioxide. The effects of the oxidation temperature of the PAN hollow fiber precursor on the microstructure, specific surface, pore size distribution, and adsorption properties of PAN-based activated carbon hollow fiber (PAN-ACHF) were studied. When PAN hollow fibers were oxidized at 270 degrees C, because of drastic oxidation, chain scission occurred, and the number of pores within and on the surface of the resultant PAN-ACHF increased, but the pores were just in the thinner region of the skin of PAN-ACHF. The surface area of PAN-ACHF reached a maximum when the oxidation temperature was 270 degrees C. The adsorption ratios to creatinine were all higher than 90 % at all oxidation temperatures, and the adsorption ratio to VB12 reached a maximum (97 %) at 230 degrees C. The dominant pore sizes of the mesopores in PAN-ACHF ranged from 2 to 5 nm. (c) 2005 Wiley Periodicals, Inc.
机译：聚丙烯腈（PAN）中空纤维用碳酸锂铵预处理，在空气中氧化，在氮气中碳化，再用二氧化碳活化。研究了PAN中空纤维前驱体的氧化温度对PAN基活性炭中空纤维（PAN-ACHF）的微观结构，比表面积，孔径分布和吸附性能的影响。当PAN中空纤维在270摄氏度下被氧化时，由于剧烈的氧化作用，发生了断链，并且所得PAN-ACHF内和表面上的细孔数量增加，但细孔仅在皮肤的较薄区域PAN-ACHF。当氧化温度为270摄氏度时，PAN-ACHF的表面积达到最大值。在所有氧化温度下，对肌酸酐的吸附率均高于90％，在230°C下对VB12的吸附率达到最大值（97％）。 PAN-ACHF中介孔的主要孔径为2至5 nm。 （c）2005年Wiley Periodicals，Inc.

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