A novel bile salt-assisted synthesis of colloidal polypyrrole nanoparticles
| Autor: | Lorena Armenta-Villegas, Jaime Lizardi-Mendoza, D.E. Rodríguez-Félix, Tania E. Lara-Ceniceros, R.V. Quevedo-Robles, Daniel Fernández-Quiroz, M.M. Castillo-Ortega, T. del Castillo-Castro, G.A. Grijalva-Bustamante, J. C. Encinas |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Nucleation Nanoparticle Isothermal titration calorimetry 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology Polypyrrole 01 natural sciences 0104 chemical sciences Colloid chemistry.chemical_compound Colloid and Surface Chemistry chemistry Dynamic light scattering Chemical engineering Emulsion 0210 nano-technology |
| Zdroj: | Colloids and Surfaces A: Physicochemical and Engineering Aspects. 600:124961 |
| ISSN: | 0927-7757 |
| DOI: | 10.1016/j.colsurfa.2020.124961 |
| Popis: | We report, for the first time, the use of a bile salt, the sodium taurocholate (Tch), as a surface-active agent in the emulsion synthesis of electroactive polypyrrole (PPy) nanoparticles. PPy was obtained under mild and environmentally friendly conditions, using hydrogen peroxide (H2O2) as a green oxidant. The combined addition of a non-ionic surfactant, Tween 20 (Tw), was also studied. The electrical, structural, morphological, and colloidal properties of reaction products were analyzed in detail to find the best conditions of synthesis. The pre-polymerization emulsion systems were studied by osmometric measurements, isothermal titration calorimetry (ITC), and dynamic light scattering (DLS). A consistent mechanism of nucleation and growth of PPy colloids is proposed. The Tch acts as an emulsifier of the reaction media, a doping agent of oxidized chain of PPy, and a stabilizer of the resulting colloids. The main advantage of this work is the preparation of polymer colloids through a completely green alternative route, which could open up new possibilities for obtaining nanoparticles through an effective and non-toxic method. |
| Databáze: | OpenAIRE |
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