Carbonized polyaniline cryogel: A spectroscopic study
July 10-14, 2016
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  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 . 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) . The conversion to nitrogen-containing carbon is complete at 500 °C.
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Miroslava Trchová, Patrycja Bober, and Jaroslav Stejskal, "Carbonized polyaniline cryogel: A spectroscopic study" in "Colloidal, Macromolecular & Biological Gels: Formulation, Properties & Applications", ECI Symposium Series, (2016). http://dc.engconfintl.org/cmb_gels/44