Conducting polymer colloids, hydrogels, and cryogels: common start to various destinations
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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.
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