TY - JOUR
T1 - Novel electroconducting polypyrrole/carbon nanotube/alginate nanocomposites synthesized by hydrogen peroxide-mediated emulsion pathway
AU - Quevedo-Robles, R. V.
AU - Grijalva-Bustamante, G. A.
AU - del Castillo-Castro, T.
AU - Castillo-Ortega, M. M.
AU - Rodríguez-Félix, D. E.
AU - Lara Ceniceros, Tania E.
AU - Mayen-Mondragon, R.
AU - Santos Sauceda, I.
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/7/1
Y1 - 2019/7/1
N2 - 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.
AB - 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.
KW - Carbon nanotubes
KW - Emulsion polymerization
KW - Nanocomposites
KW - Polypyrrole
UR - http://www.mendeley.com/research/novel-electroconducting-polypyrrolecarbon-nanotubealginate-nanocomposites-synthesized-hydrogen-perox
U2 - 10.1016/j.synthmet.2019.05.006
DO - 10.1016/j.synthmet.2019.05.006
M3 - Artículo
SN - 0379-6779
VL - 253
SP - 100
EP - 109
JO - Synthetic Metals
JF - Synthetic Metals
ER -