Effects of multi-step stabilization method on textural properties of polyolefin-based activated carbon fibers

IF 5.5 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Carbon Letters Pub Date : 2023-09-28 DOI:10.1007/s42823-023-00614-z

Jeong-Rae Ahn, Hye-Min Lee, Byung-Joo Kim

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Abstract

In this study, we utilized a multi-step stabilization method, incorporating dry-oxidation, to produce high-density polyethylene (HDPE)-based activated carbon fibers. This stabilization was achieved through electron-beam irradiation, sulfonation, and dry oxidation. The stabilized fibers were carbonized and activated at 900 ℃. The crystallite characteristics of the activated carbon fibers were observed using X-ray diffraction, and their surface morphologies were analyzed through scanning electron microscopy. The textural properties were analyzed using N₂/77 K adsorption–desorption isothermal curves. And leveraging the microdomain model, we explored the influence of these stabilization methods on the HDPE-based activated carbon fibers texture properties. The results show that HDPE fibers treated with sulfonation only at 100 ℃ for 60 min were not sufficiently cross-linked and were completely decomposed during the carbonization stage. However, the sulfonated fibers treated with the new dry-oxidation process maintained their shapes and were successfully activated. The specific surface area of the resulting activated carbon fibers was as much as 2000 m²/g.

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多步稳定法对聚烯烃基活性炭纤维纹理特性的影响

在这项研究中，我们采用了一种包含干氧化的多步骤稳定化方法来生产基于高密度聚乙烯（HDPE）的活性炭纤维。这种稳定化是通过电子束辐照、磺化和干氧化实现的。稳定后的纤维在 900 ℃ 下进行碳化和活化。使用 X 射线衍射观察了活性碳纤维的晶粒特征，并通过扫描电子显微镜分析了其表面形态。利用 N2/77 K 吸附-解吸等温曲线分析了质构特性。利用微域模型，我们探讨了这些稳定化方法对高密度聚乙烯基活性炭纤维质地特性的影响。结果表明，仅在 100 ℃ 下进行 60 分钟磺化处理的高密度聚乙烯纤维交联不充分，在碳化阶段完全分解。然而，经过新型干氧化工艺处理的磺化纤维则保持了原有的形状，并成功实现了活化。所得活性碳纤维的比表面积高达 2000 m2/g。

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来源期刊

Carbon Letters CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

7.30

自引率

20.00%

发文量

118

期刊介绍： Carbon Letters aims to be a comprehensive journal with complete coverage of carbon materials and carbon-rich molecules. These materials range from, but are not limited to, diamond and graphite through chars, semicokes, mesophase substances, carbon fibers, carbon nanotubes, graphenes, carbon blacks, activated carbons, pyrolytic carbons, glass-like carbons, etc. Papers on the secondary production of new carbon and composite materials from the above mentioned various carbons are within the scope of the journal. Papers on organic substances, including coals, will be considered only if the research has close relation to the resulting carbon materials. Carbon Letters also seeks to keep abreast of new developments in their specialist fields and to unite in finding alternative energy solutions to current issues such as the greenhouse effect and the depletion of the ozone layer. The renewable energy basics, energy storage and conversion, solar energy, wind energy, water energy, nuclear energy, biomass energy, hydrogen production technology, and other clean energy technologies are also within the scope of the journal. Carbon Letters invites original reports of fundamental research in all branches of the theory and practice of carbon science and technology.