Polypyrrole production through chemical polymerization using anionic and cationic dopants: The influence of synthesis conditions and reaction kinetics
| Autor: | Alexandre F. Santos, Michele Di Domenico, Ana Paula Romio, Leila M. Santos, Claiton Zanini Brusamarello, Claudia Sayer, Pedro Henrique Hermes de Araújo |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Materials science Kinetics Cationic polymerization 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology Polypyrrole 01 natural sciences 0104 chemical sciences Chemical kinetics chemistry.chemical_compound chemistry Polymerization Chemical engineering Mechanics of Materials Ionic liquid Materials Chemistry General Materials Science Thermal stability 0210 nano-technology |
| Zdroj: | Materials Today Communications. 26:101740 |
| ISSN: | 2352-4928 |
| DOI: | 10.1016/j.mtcomm.2020.101740 |
| Popis: | The aim of this study was to use gravimetric analysis to assess the kinetics of chemical polymerization of pyrrole in water, applying ferric chloride as oxidant. The influence of temperature, the concentration of FeCl3.6H2O, and the presence of different types of dopants (two anionic, one cationic, and one ionic liquid) on conversion, morphology, thermal stability, and conductivity of polypyrrole was investigated. The results showed a conversion close to 90 % at 20 °C with 0.5 M of FeCl3.6H2O and increased above 100 % with the addition of DBSA, due to its incorporation in the polymer chain. The polypyrrole nanoparticles had average sizes of 360 nm at 5 °C and 320 nm at 20 °C. Both of the dopants, SDS and C12MimCl, stabilized the nanoparticles. The use of SDS conferred an electrical conductivity of 13.30 S cm-1 to the polymer. Finally, the kinetic model (two fast sequential reactions, i.e., consumption of pyrrole via an oxidation reaction and reaction with oxidized oligomers) satisfactorily fitted the experimental data (with R2 > 0,9). |
| Databáze: | OpenAIRE |
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