Carbonized polyaniline cryogel: A spectroscopic study

Content Provider	Semantic Scholar
Author	Trchová, Miroslava Bober, Patrycja Stejskal, Jaroslav
Copyright Year	2016
Abstract	Cryogels are chemically or physically crosslinked systems of polymer chains swollen with water. They are produced by the preparation of conducting polymers in frozen media, in ice. They contain a conducting component, typically a conducting polymer, such as polyaniline [1] and suitable supporting polymer. Raman spectroscopy allows for the analysis of wet samples or of aqueous solutions. Freeze-dried polyaniline cryogel has been prepared from polyaniline and was also analyzed with Raman spectroscopy. The carbonization has been followed by thermogravimetric analysis in inert atmosphere [2]. The macroporous morphology of polymer aerogel was retained after carbonization (Fig. 1). Raman spectra of polyaniline salt at 20 and 100 oC present the bands of the phenazine-like segments in polyaniline at 1646, 1401 and 578 cm–1, indicating extensive cross-linking of units (Fig. 2) [3]. The conversion to nitrogen-containing carbon is complete at 500 °C.
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Language	English
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Resource Type	Article