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• W2093752495 abstract "Ceramic nanocomposites constituted by a matrix of α -Al 2 O 3 microparticles reinforced by polyaniline emeraldine-salt form (PANI-ES) nanoparticles were prepared by in situ polymerization and characterized structural and morphologically. Peaks related to both materials were observed through XRD technique: PANI-ES presented peaks at<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M1><mml:mn>2</mml:mn><mml:mi>θ</mml:mi></mml:math>= 8.9, 14.9, 20.8, 25.3, 27.1, and 30.0° and in α -Al 2 O 3 phase peaks were found at<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M2><mml:mn>2</mml:mn><mml:mi>θ</mml:mi></mml:math>= 25.6, 35.2, 37.9, 43.5, 52.6, 57.6, and 68.1°. Nanocomposite crystallinity percentage was estimated around 70%. SEM showed a polymerization of PANI-ES over alumina plates. By Le Bail method it was observed that PANI-ES and α -Al 2 O 3 have crystallite average size around, respectively, 41 and 250 Å. By FTIR analysis characteristic absorption bands of both materials were identified. Additional bands indicating new chemical bonds were not observed, suggesting that nanocomposite was formed by physical deposition. Nanocomposite DC electrical conductivity was found around 0.24 S/cm (against<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M3><mml:mn>1.84</mml:mn><mml:mo>×</mml:mo><mml:msup><mml:mrow><mml:mn>10</mml:mn></mml:mrow><mml:mrow><mml:mo>-</mml:mo><mml:mn mathvariant=normal>4</mml:mn></mml:mrow></mml:msup></mml:math> S/cm for pure PANI-ES), showing an increase of about 1,300 times compared to the pure PANI-ES at room temperature. Thus, this paper showed that both materials have kept its original structural characteristics and exhibited high electrical conductivity when combined in nanocomposite form." @default.
• W2093752495 created "2016-06-24" @default.
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• W2093752495 date "2015-01-01" @default.
• W2093752495 modified "2023-10-16" @default.
• W2093752495 title "The Use of Le Bail Method to Analyze the Semicrystalline Pattern of a Nanocomposite Based on Polyaniline Emeraldine-Salt Form and<i>α</i>-Al₂O₃" @default.
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• W2093752495 doi "https://doi.org/10.1155/2015/375312" @default.
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