Low-temperature thermal stabilization of polyacrylontrile-based precursor fibers towards efficient preparation of carbon fibers with improved mechanical properties
文献类型：期刊论文
| 作者 | Chai, Xiaoyan1,2; Mi, Hongwei2; Zhu, Caizhen2; He, Chuanxin2; Xu, Jian3; Zhou, Xuechang2; Liu, Jianhong2 |
| 刊名 | POLYMER
 |
| 出版日期 | 2015-10-12 |
| 卷号 | 76页码:131-139 |
| 关键词 | Carbon fibers Low-temperature thermal stabilization Mechanical properties |
| 英文摘要 | This article describes a low-temperature thermal stabilization method, for the efficient preparation of polyacrylontrile (PAN)-based carbon fibers with improved mechanical properties. In this method, bundles of regular PAN precursor fibers were firstly heated and stored in air for 30 days at 120 degrees C to cyclise the nitrile groups and oxidize the PAN backbone. A further stabilization above 200 degrees C in air made the pretreated fibers fully stabilized. Structural changes of the as-made PAN fibers were observed by Fourier Transform infrared spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction, differential scanning calorimetry, thermogravimetry and dynamic mechanical analysis. Microvoid evolutions of the fibers during stabilization and carbonization process were studied by synchrotron small-angle X-ray scattering. Our results showed that the initiation of the cyclization and oxidation reaction at 120 degrees C not only restricts the disorientation of PAN molecules but also reduces the pyrolysis of molecular chains at higher temperatures in the carbonization process. Hence, preferred orientation of crystallites and char yield increased. Moreover, microvoid defects were significantly reduced, leading to a significant improvement of the mechanical properties (a 16% increment in the tensile strength). (C) 2015 Elsevier Ltd. All rights reserved. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2015-12-22 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/29142]  |
| 专题 | 化学研究所_高分子物理与化学实验室 |
| 作者单位 | 1.S China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China 2.Shenzhen Univ, Coll Chem & Chem Engn, Shenzhen Key Lab Funct Polymer, Shenzhen 518060, Peoples R China 3.Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chai, Xiaoyan,Mi, Hongwei,Zhu, Caizhen,et al. Low-temperature thermal stabilization of polyacrylontrile-based precursor fibers towards efficient preparation of carbon fibers with improved mechanical properties[J]. POLYMER,2015,76:131-139. |
| APA | Chai, Xiaoyan.,Mi, Hongwei.,Zhu, Caizhen.,He, Chuanxin.,Xu, Jian.,...&Liu, Jianhong.(2015).Low-temperature thermal stabilization of polyacrylontrile-based precursor fibers towards efficient preparation of carbon fibers with improved mechanical properties.POLYMER,76,131-139. |
| MLA | Chai, Xiaoyan,et al."Low-temperature thermal stabilization of polyacrylontrile-based precursor fibers towards efficient preparation of carbon fibers with improved mechanical properties".POLYMER 76(2015):131-139. |
入库方式： OAI收割
来源：化学研究所
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