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Electropolymerisation of TiO2 polyaniline nanocomposite and its use as a protective coating on mild steel

In this study, TiO2 was used as an additive for polyaniline, considered to be a matrix polymer. The nanocomposite film was fabricated electrochemically on metal surfaces (mild steel and stainless steel). The electrochemical properties of polyaniline could be seen on the cyclic voltammogram. | JOURNAL OF SCIENCE OF HNUE Interdisciplinary Science 2013 Vol. 58 No. 5 pp. 22-29 This paper is available online at http stdb.hnue.edu.vn ELECTROPOLYMERISATION OF TiO2 POLYANILINE NANOCOMPOSITE AND ITS USE AS A PROTECTIVE COATING ON MILD STEEL Le Minh Duc1 and Vu Quoc Trung2 1 Faculty of Chemistry University of Technology Da Nang University of Technology 2 Faculty of Chemistry Hanoi National University of Education Abstract. Nanocomposite material has been getting much more attention in recent years by scientists. Nanomaterials which can be used to fabricate nanocomposite come in the form of wire tubes or particles. The matrix polymer can be thermoplastics or thermoset plastics such as phenolic resin epoxy resin and unsaturated polyester or conducting polymers such as polyaniline polypyrrole polyethylene polypropylene and polystyrene. In this study TiO2 was used as an additive for polyaniline considered to be a matrix polymer. The nanocomposite film was fabricated electrochemically on metal surfaces mild steel and stainless steel . The electrochemical properties of polyaniline could be seen on the cyclic voltammogram. With mechanical stirring during electropolymerisation TiO2 nano particles could be incorporated into the nanocomposite film. A TEM image showed that TiO2 particles were distributed homogenously in the coating. The presence of TiO2 also could be seen with X-Ray Diffraction XRD measurement. A Scanning Kelvin Probe SKP showed that the adhesion and the corrosion resistance of a nanocomposite coating could be improved with TiO2 in a solution of 3 NaCl. Keywords Nanocomposite polyaniline electropolymerisation corrosion protection TiO2 Scanning Kelvin Probe. 1. Introduction Nanocomposite material has been getting a lot more attention from scientists in recent years. Due to its good properties nanocomposite has been investigated more than other materials 1 2 . Nanomaterial consists of at least one constituent that is in the nano meter scale. It can be in the