A statistical approach to evaluate the oxidative process of electrospun polyacrylonitrile ultrathin fibers

A statistical approach to evaluate the oxidative process of electrospun polyacrylonitrile ultrathin fibers

Author de Oliveira Junior, Mauro Santos Autor UNIFESP Google Scholar
Manzolli Rodrigues, Bruno Vinicius Google Scholar
Marcuzzo, Jossano Saldanha Google Scholar
Guerrini, Lilia Muller Autor UNIFESP Google Scholar
Baldan, Mauricio Ribeiro Google Scholar
Rezende, Mirabel Cerqueira Autor UNIFESP Google Scholar
Abstract A systematic study using design of experiments was applied in order to map out the thermal stabilization of electrospun polyacrylonitrile mats and to investigate how oxidation and cyclization reactions are affected by rate, temperature, and time in an oxidative environment. Cyclization indexes were estimated by a simple methodology based on differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy data. Values of enthalpy and relative intensities of bands assigned to CN and CN bonds were used on calculation. The statistical planning applied in this study was important to show that not always longest treatment is effective to stabilize polyacrylonitrile, but also samples obtained in less than 3 h presented low values of exothermic peak on DSC, values of cyclization indexes near to 90%, both from DSC and Fourier transform infrared spectroscopy techniques, reduced weight loss in thermogravimetric analysis and O/C ratio higher than 10% by X-ray photoelectron spectroscopy, that are appreciated characteristics to a precursor of high-performance carbon materials. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45458.
Keywords electrospinning
nanostructured polymers
synthesis and processing techniques
thermal properties
xmlui.dri2xhtml.METS-1.0.item-coverage Hoboken
Language English
Sponsor National Council for Scientific and Technological Development CNPq
CAPES/PVNS
Sao Paulo Research Foundation (FAPESP)
Grant number CNPq: 303287/2013-6
FAPESP: 2014/00560-9
Date 2017
Published in Journal Of Applied Polymer Science. Hoboken, v. 134, n. 43, p. -, 2017.
ISSN 0021-8995 (Sherpa/Romeo, impact factor)
Publisher Wiley
Extent -
Origin http://dx.doi.org/10.1002/app.45458
Access rights Closed access
Type Article
Web of Science ID WOS:000407604400018
URI https://repositorio.unifesp.br/handle/11600/58172

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