Conducting polymer colloids, hydrogels, and cryogels: common start to various destinations
When a conducting polymer, polyaniline, is prepared in the aqueous solutions of poly(vinyl alcohol), it is obtained as a colloidal dispersion of submicrometer particles. When the reaction mixture is frozen before the oxidation of aniline takes place, polyaniline is produced in ice, and a cryogel results after thawing. This technique of conducting hydrogel preparation has been reported only recently. It is newly demonstrated, that colloidal hydrogels are obtained after freezing of colloidal dispersions. Finally, the cryogenic preparation of polyaniline in polyaniline colloids combines latter two techniques of hydrogel preparation to generate a dispersion cryogel. It is thus illustrated that, by using a simple initial system, various macroporous-conducting hydrogels differing in morphology, conductivity, and mechanical properties can be achieved.
KeywordsConducting polymer Polyaniline Colloidal dispersion Hydrogel Cryogel
The authors wish to thank the Czech Science Foundation (16-02787S) for financial support.
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Conflict of interest
The authors declare that they have no conflict of interest.
- 2.Stejskal J, Trchová M, Bober P, Humpolíček P, Kašpárková V, Sapurina I, Shishov MA, Varga M (2015) Conducting polymers: polyaniline In: Encyclopedia of polymer science and technology, Wiley Online Library, pp 1–44. https://doi.org/10.1002/0471440264.pst640
- 6.Stejskal J (2001) Colloidal dispersions of conducting polymers. J Polym Mater 18:225–258Google Scholar
- 12.Stejskal J, Sapurina I, Trchová M (2010) Polyaniline nanostructures and the role of aniline oligomers in their formation. Prog Polym Sci 35:1420–1481. https://doi.org/10.1016/j.progpolymsci.2010.07.006 CrossRefGoogle Scholar
- 24.Bober P, Trchová M, Morávková Z, Kovářová J, Vulić I, Gavrilov N, Pašti IA, Stejskal J (2017) Phosphorus and nitrogen-containing carbons obtained by the carbonization of conducting polyaniline complex with phosphites. Electrochim Acta 246:443–450. https://doi.org/10.1016/j.electacta.2017.06.036 CrossRefGoogle Scholar
- 25.Trchová M, Konyushenko EN, Stejskal J, Kovářová J, Ćirić-Marjanović G (2009) The conversion of polyaniline nanotubes to nitrogen-containing carbon nanotubes and their comparison with multi-walled carbon nanotubes. Polym Degrad Stab 94:929–938. https://doi.org/10.1016/j.polymdegradstab.2009.03.001 CrossRefGoogle Scholar
- 30.Bhadra S, Khastgir D, Singha NK, Lee JH (2009) Progress in preparation, processing and applications of polyaniline. Prog Polym Sci 34:783–810. https://doi.org/10.1016/j.progpolymsci.2009.04.003 CrossRefGoogle Scholar