Synthesis of polypyrrole/Ni-doped TiO 2 Nanocomposites (NCs) as a protective pigment in organic coating

Mahmoudian, M.R. and Alias, Y. and Basirun, Wan Jefrey (2011) Synthesis of polypyrrole/Ni-doped TiO 2 Nanocomposites (NCs) as a protective pigment in organic coating. Progress in Organic Coatings, 71 (1). pp. 56-64. ISSN 03009440, DOI

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This study reports the synthesis of polypyrrole/Ni-doped TiO 2 nanocomposites (NCs) as a protective pigment in organic coatings. Polypyrrole/Ni-doped TiO 2 NCs were prepared by in situ chemical oxidative polymerization of pyrrole monomer in the presence of Ni-doped TiO 2 nanoparticles (NPs) with ammonium persulfate (APS) as oxidant. Field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) result show a core-shell structure of the pigments. The XRD results indicate that the average crystalline size of Ni-doped TiO 2 NPs is larger than TiO 2 NPs while the sizes of polypyrrole/TiO 2 NCs and polypyrrole/Ni-doped TiO 2 NCs were 93.46 ± 0.06 and 26.16 ± 0.06 nm respectively. Hence the thickness of the shell in the core-shell incorporating the Ni-doped/TiO 2 NPs was very thin and the area of synthesized PPy is increased. The electrochemical impedance spectroscopy (EIS) results show that increasing the area of synthesized polypyrrole in the presence of Ni-doped-TiO 2 NPs can increase its ability to interact with the ions liberated during the corrosion reaction of steel in the presence of NaCl. © 2010 Elsevier B.V. All rights reserved.

Item Type: Article
Additional Information: Department of Chemistry, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA
Uncontrolled Keywords: Coating, Corrosion, Nanocomposite, Pyrrole, Steel, Ammonium persulfate, Average crystalline size, Chemical oxidative polymerization, Core shell structure, Core-shell, Corrosion reaction, Doped-TiO, Field emission scanning electron, microscopy, In-situ, Ni-doped, Pyrrole monomers, TEM, TiO, XRD, Ammonium compounds, Electrochemical corrosion, Electrochemical impedance spectroscopy, Field emission, Field emission microscopes, Nanocomposites, Polypyrroles, Protective coatings, Scanning electron microscopy, Sodium chloride, Synthesis (chemical), Transmission electron microscopy, Organic coatings
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Science > Department of Chemistry
Depositing User: Miss Malisa Diana
Date Deposited: 25 Jul 2013 01:09
Last Modified: 31 Jan 2019 08:14

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