Novel electroconducting polypyrrole/carbon nanotube/alginate nanocomposites synthesized by hydrogen peroxide-mediated emulsion pathway
| Autor: | D.E. Rodríguez-Félix, Tania Ernestina Lara Ceniceros, Ma.Monica Castillo-Ortega, R.V. Quevedo-Robles, G.A. Grijalva-Bustamante, I. Santos Sauceda, R. Mayen-Mondragon, T. del Castillo-Castro |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
02 engineering and technology Carbon nanotube 010402 general chemistry Polypyrrole 01 natural sciences law.invention Contact angle chemistry.chemical_compound Dynamic light scattering law Materials Chemistry Zeta potential Nanocomposite Mechanical Engineering Metals and Alloys 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Electronic Optical and Magnetic Materials Dielectric spectroscopy chemistry Chemical engineering Polymerization Mechanics of Materials 0210 nano-technology |
| Zdroj: | Synthetic Metals. 253:100-109 |
| ISSN: | 0379-6779 |
| DOI: | 10.1016/j.synthmet.2019.05.006 |
| Popis: | The development of Green-based methods for preparing polypyrrole (PPy)-containing materials with optimal electroactivity still remains a challenge. We herein report a new green approach for the preparation of PPy/carbon nanotube/alginate multifunctional nanocomposites through H2O2 oxidation in micellar medium. The polymerization conditions were systematically varied to optimize the reaction yield and the material electroconductivity. The pre-polymerization emulsion system was studied by contact angle measurements and dynamic light scattering. The results of zeta potential characterization, field-emission scanning electron and atomic force microscopy, Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, and electrochemical impedance spectroscopy are discussed in detail, and a consistent mechanism for the nanocomposite formation is proposed. Interestingly, the synergistic combination of pristine carbon nanotubes and the alginate improves the conductivity and stability of PPy-based colloids. Furthermore, a metoprolol-loaded platform, obtained by the confinement of the synthesized nanocomposite into an alginate network, revealed a cumulative release lesser than 10% after five hours of delivery under passive conditions. This behavior seems to be promising to overcome the undesired burst release in stimulus-controlled drug delivery. |
| Databáze: | OpenAIRE |
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