Self-assembled Films of Poly(o-Ethoxyaniline) Grafted with Functionalized Multiwalled Carbon Nanotubes

Autor(es)

Soares, Vinicius Bianchi ^[1] ; Polaci da Silva, Luis Antonio ^[2] ; de Araujo, Gabriela Martins ^[1] ; Simoes, Fabio Ruiz ^[2]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Paulo, Grad Program Chem Sustainabil Sci & Technol, Diadema - Brazil

^[2] Univ Fed Sao Paulo, Inst Marine Sci, Santos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ELECTRONIC MATERIALS LETTERS; v. 16, n. 6 SEP 2020.
• Citações Web of Science: 0

Resumo

In this study, composites based on poly(o-ethoxyaniline), POEA, and its composites grafted with functionalized multiwalled carbon nanotubes (MWCNT) were obtained by the oxidative in situ chemical polymerization varying the mass ratio ofo-ethoxyaniline:MWCNT of 100:1 and 100:5. POEA and its POEA-MWCNT grafted composites were used to prepare self-assembled (SA) deposited onto indium tin oxide (ITO) substrates with alternating layers of polystyrene sulfonate (PSS). The structure and morphology of the samples were characterized by Fourier transform infrared spectroscopy and scanning electron microscopy. The SA films were characterized by cyclic voltammetry, UV-Vis and electrochemical impedance spectroscopy (EIS). The EIS results showed expressive decrease of the polarization resistance (R-p), from 13,342 Omega, for POEA/PSS, to 568 Omega for POEA-MWCNT(100:1)/PSS (about 23 times lower) and to 240 Omega for POEA-MWCNT(100:5)/PSS film. Considering that higher mass proportions of MWCNT can affect the final morphology and the oxidation ratio of POEA chains and aiming strong interactions between the POEA and MWCNT as well the significant reduction of charge transfer resistance, the SA film POEA-MWCNT(100:1)/PSS has potential for future applications as sensors and charge storage devices. (AU)

• Processo FAPESP: 14/23858-3 - Desenvolvimento de materiais de sensores baseados em filmes automontados de polímeros condutores e nanotubos de carbono para a determinação de desreguladores endócrinos em ambientes marinhos
• Beneficiário: Fabio Ruiz Simões
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 17/24742-7 - Sensores baseados em compósitos de polímeros condutores e grafeno visando à determinação de substâncias desreguladoras endócrinas em ambiente marinho
• Beneficiário: Fabio Ruiz Simões
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 17/08989-2 - 68th Annual Meeting of the International Society of Electrochemistry
• Beneficiário: Fabio Ruiz Simões
• Modalidade de apoio: Auxílio à Pesquisa - Reunião - Exterior