Thermal stabilization of poly(acrylonitrile-co-itaconic acid) nanofibers as carbon nanofiber precursor
Thermal stabilization of poly(acrylonitrile-co-itaconic acid) nanofibers as carbon nanofiber precursor
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DOI：
10.1016/j.polymdegradstab.2020.109142
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发表时间：
2020-05
影响因子：
5.9
通讯作者：
E. Ismar;M. Mičušík;Ilknur Gergin;M. Omastová;A. Sarac
中科院分区：
文献类型：
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作者：
E. Ismar;M. Mičušík;Ilknur Gergin;M. Omastová;A. Sarac
聚（丙烯腈-co-衣康酸）、（P (AN-co-IA)）和聚丙烯腈（PAN）在氧气气氛下的热处理机理复杂，对最终产品纳米碳纤维的性能影响很大。前驱体组成和氧化处理参数对最终产品的预期性能起着关键作用；碳纳米纤维。采用静电纺丝技术制备PAN和P （AN-co-IA）基纳米纤维，并在不同温度下进行处理，研究衣康酸作为共聚物存在下的氧化过程。描述纳米纤维的氧化（热稳定）路线是具有挑战性的，因此强大的表征工具，如电化学阻抗谱（EIS）， x射线光电子能谱（XPS）和FTIR-ATR被用于表征和评估。指出了所有得到的结果；与均聚丙烯腈相比，IA的加入对纳米级氧化过程有积极的影响，可以降低施加温度和时间。光谱结果也与电化学阻抗光谱测量的等效电路参数相关，其中由于热处理形成杂环和共轭结构，可以很容易地跟踪氧化和碳化阶段。
The thermal treatment of poly (acrylonitrile-co-itaconic acid), (P (AN-co-IA)) and polyacrylonitrile (PAN) under the oxygen atmosphere has a complex mechanism which strongly affects the properties of final product carbon nanofiber. Not only precursor composition but also oxidation treatment parameters play a key role in the achievement of the desired properties of the end product; carbon nanofiber. PAN and P (AN-co-IA) based nanofibers were fabricated via electrospinning technique and later treated at different temperatures to investigate the oxidation procedure in the presence of itaconic acid as a copolymer form. Description of the oxidation (thermal stabilization) route of nanofibers is challenging thus powerful characterization tools such as electrochemical impedance spectroscopy (EIS), X-ray photoelectron spectroscopy (XPS), and FTIR-ATR are used for characterization and evaluated dependently. All obtained results are pointed out that; IA addition has a positive effect on the oxidation process in nanoscale in terms of reduction of applied temperature and time compared to homopolymer PAN. Spectroscopic results were also correlated with the equivalent Circuit Parameters of Electrochemical Impedance Spectroscopic Measurements, where oxidation and carbonization stages can be followed easily due to the formation of heterocyclic and conjugated structures by thermal treatments.