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Galvanic function of zinc-rich coatings facilitated by percolating structure of the carbon nanotubes : Part I: Characterisation of the nanosize particles

Gergely, András and Pászti, Zoltán and Mihály, Judith and Drotár, Eszter and Török, Tamás (2013) Galvanic function of zinc-rich coatings facilitated by percolating structure of the carbon nanotubes : Part I: Characterisation of the nanosize particles. Progress in Organic Coatings, 2013. ISSN 0300-9440

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Abstract

The newly developed zinc-rich hybrid paints are composed of polypyrrole (PPy) and polystyrene-sulfonate (PSS) modified alumina hydrate and either purified or functionalized multi-walled carbon nanotubes (MWCNTs). Preparation of the nano-size particles, i.e., in situ polymerisation and deposition of PPy-PSS complexes on the mixture of alumina hydrate and MWCNTs is presented. Characterisation of the particles by cyclic voltammetry (CV), Fouriertransform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM) as well as their dispersions by rheology investigation is detailed in this part of the work. High electrochemical reversibility, increasing electrical conductivity and Coulombic efficiency of the particles with greater relative amount of the MWCNTs were evinced. Thin layer polymer deposition was found continuous on alumina and the MWCNTs and varied compactness of the PPy films and charge-delocalisation over their network were witnessed depending on the proportion of incorporated PSS. Different micron-scale dispersity of the particles, compactness and ramification of particle clusters as well as their aggregation at nano-scale and flocculation at micronscale were disclosed resulting in either kinetically three-dimensional (3D) interacting or nonpercolating distribution. Corrosion protection performance of the hybrid coatings were examined whereas characteristics of the protection mechanism is substantially analysed from many perspectives, which all detailed in 2nd part of this study.

Item Type: Article
Uncontrolled Keywords: A. polypyrrole, carbon nanotubes, nano-size particles B. FTIR, CV, Rheology
Subjects: Q Science / természettudomány > Q1 Science (General) / természettudomány általában
Q Science / természettudomány > QD Chemistry / kémia
SWORD Depositor: MTMT SWORD
Depositing User: MTMT SWORD
Date Deposited: 13 Jan 2014 14:00
Last Modified: 13 Jan 2014 14:02
URI: http://real.mtak.hu/id/eprint/8637

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