1D-polyaniline starting from self-assembled systems
| Autor: | Catalin Ilie Spataru, Marius Ghiurea, Dan F. Anghel, Mihaela Baibarac, Gabriela Stîngă, Dan Donescu, Ioan Baltog |
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| Rok vydání: | 2015 |
| Předmět: |
Materials science
Aqueous solution Polymers and Plastics Radical polymerization Analytical chemistry chemistry.chemical_compound symbols.namesake Colloid and Surface Chemistry chemistry Dynamic light scattering Chemical engineering Critical micelle concentration Polyaniline Materials Chemistry symbols Ammonium persulfate Physical and Theoretical Chemistry Raman spectroscopy Thermal analysis |
| Zdroj: | Colloid and Polymer Science. 293:2515-2524 |
| ISSN: | 1435-1536 0303-402X |
| Popis: | The radical polymerization of aniline hydrochloride (ANIHCl) in the presence of ammonium persulfate was studied. 1D-Polyaniline (PANI) with fibrillar morphologies was obtained in the presence of anionic surfactants. The changes of the PANI-template structures in aqueous solution were studied using static fluorescence measurements. The dispersed PANI nanoparticles were characterized using dynamic light scattering, scanning electron microscopy (SEM), and Raman and Fourier transform infrared spectroscopies. The thermal analysis and the electrical conductivity of the dried samples were also performed. The fluorescence measurements indicated that nanocrystals of ANIHCl form in water complexes with the anionic surfactants at smaller concentrations than the critical micellar concentration. The same method revealed that other organic complexes with sulfonate groups do not induce an increase of the hydrophobic region due to short hydrocarbon tails. The SEM micrographs and Raman spectra revealed that the PANI nanofibers are compact and different compared to the nanoparticles prepared without surfactants. |
| Databáze: | OpenAIRE |
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