Navegando por Palavras-chave "Poly (ortho-ethoxyaniline)"

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    Desenvolvimento de filmes automontados baseados em compósitos de poli (orto-etoxianilina) e nanotubos de carbono
    (Universidade Federal de São Paulo, 2018-12-07) Soares, Vinicius Bianchi [UNIFESP]; Simões, Fabio Ruiz [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    Materials such as conductive polymers and carbon nanotubes are considered as promising materials for several applications, among them the development of electrodes in charge storages as well as sensors due to their characteristics such as electrical conductivity, decrease of oxidation potential, enhance of reaction speed and so forth. Conductive polymers have as advantage their electrical conductivity that can be modulated by oxidation reactions and by interactions with electron acceptors and donors, while carbon nanotubes can promote electron transfer reactions, increase the reaction rate and decrease oxidation potentials. When combined, these materials show synergy of their properties. Thus, this project aimed at the synthesis and characterization of conductive composites by the in-situ polymerization of poly (ortho-ethoxyaniline), a derivative of the polyaniline, with carbon-functional multilayered carbon nanotubes with different mass fractions, as well as to produce and characterize modified electrodes by evaporation (casting) and by the process of self-assembling on substrates of glass covered with indium oxide and tin. The electrodes produced were characterized using the techniques of Cyclic Voltammetry, Electrochemical Impedance Spectroscopy, UV-Visible Spectroscopy and Scanning Electron Microscopy. The results showed that the electrodes modified with composites showed synergism of properties by the increase of the current signals of the polymer and decrease of the capacitive current as well as by the decrease of the resistance to the transfer of charge.