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Polyaniline-modified graphene oxide nanocomposites in epoxy coatings for enhancing the anticorrosion and antifouling properties / Sara Fazli-Shokouhi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 4 (07/2019)
[article]
Titre : Polyaniline-modified graphene oxide nanocomposites in epoxy coatings for enhancing the anticorrosion and antifouling properties Type de document : texte imprimé Auteurs : Sara Fazli-Shokouhi, Auteur ; Farzad Nasirpouri, Auteur ; Maasoumeh Khatamian, Auteur Année de publication : 2019 Article en page(s) : p. 983-997 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Epoxydes
Métaux -- Revêtements protecteurs
Nanoparticules
Oxyde de graphène
Polyaniline
Revêtements antisalissures:Peinture antisalissuresIndex. décimale : 667.9 Revêtements et enduits Résumé : We report on the anticorrosion and antifouling properties of epoxy-based polyaniline (PANI)–graphene oxide nanosheets (GONs) paint coatings. PANI-based nanocomposites with different fractions of GONs were synthesized by an in situ polymerization process. Well-dispersed GONs were prepared using a modified Hummers’ method in the presence of (NH4)2S2O8 as an effective oxidant. We employed a spontaneous in situ polymerization at a constant temperature of 0°C using an ultrasonic bath to produce homogenous PANI-GON nanocomposites as characterized by X-ray diffraction (XRD), Fourier transfer infrared spectroscopy (FTIR), and field-emission scanning electron microscopy (FESEM) techniques. The nanocomposites were incorporated into an epoxy resin with different fractions to form epoxy/PANI-GON paint coatings. The epoxy/PANI-GON dip coated on a carbon steel (grade St-37) substrate exhibited significant improvement of the anticorrosion and antifouling properties. Epoxy-12 wt% PANI-GON coating revealed the highest corrosion resistance of 2.70 × 106 Ω cm2 after 192-h immersion in saline water measured by electrochemical impedance spectroscopy (EIS) technique. Such high corrosion resistance was attainable by inhibiting the diffusion process against the corrosive environment. Furthermore, higher protection against fouling was observed for epoxy 6 and 12 wt% PANI/GON as the most efficient antifouling composite coatings. Note de contenu : - EXPERIMENTAL : Materials and instruments - Synthesis of graphene oxide - Synthesis of PANI-GON nanocompsites - Preparation of the PANI-GON composite coatings - Antifouling properties of epoxy-based PANI-GON nanocomposite coatings
- RESULTS AND DISCUSSION : FTIR study - XRD analysis - FESEM exainations - corrosion resistance of epoxy/PANI-GON coatings - Antifouling properties of epoxy/PANI-GON coatingsDOI : 10.1007/s11998-018-00173-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-00173-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32855
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 4 (07/2019) . - p. 983-997[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21127 - Périodique Bibliothèque principale Documentaires Disponible Preparation and characterization of a novel conducting nanocomposite blended with epoxy coating for antifouling and antibacterial applications / Amir Mostafaei in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 5 (09/2013)
[article]
Titre : Preparation and characterization of a novel conducting nanocomposite blended with epoxy coating for antifouling and antibacterial applications Type de document : texte imprimé Auteurs : Amir Mostafaei, Auteur ; Farzad Nasirpouri, Auteur Année de publication : 2013 Article en page(s) : p. 679-694 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens
Caractérisation
Epoxydes
Marines (peinture)
Matériaux hybrides
Oxyde de zinc
Peroxyde d'hydrogèneLe peroxyde d'hydrogène (H2O2), communément appelé eau oxygénée ou encore perhydrol (appellation industrielle), est un composé chimique liquide et visqueux, aux puissantes propriétés oxydantes (il est aussi réducteur). C'est donc un agent blanchissant efficace qui sert de désinfectant et (à haute concentration) d'oxydant ou monergol dans les fusées spatiales.
Polyaniline
Revêtements antisalissures:Peinture antisalissuresIndex. décimale : 667.9 Revêtements et enduits Résumé : In this study, novel epoxy-based paint was synthesized to be applied on carbon steel. The composition of the paint mainly contains epoxy mixed with an electronically conductive polymer, polyaniline (PANI), alone and combined with its nanocomposite derivation containing ZnO nanorods as an additive. The antifouling properties of the paint applied on carbon steel were investigated. The conductive nanocomposite was synthesized by an in situ chemical oxidative method of aniline in the presence of ZnO nanorods and then well characterized. The antifouling behavior was evaluated for 9 months in the Caspian Sea and Persian Gulf. Results revealed that epoxy/PANI–ZnO nanocomposite coating can prevent accumulation of marine macroorganisms on the coated panel. In addition, the epoxy coating comprising PANI–ZnO nanocomposite as well as the epoxy/ZnO coating exhibit significant antibacterial characteristics against (E. coli and S. epi). We interpret the antifouling and antibacterial behavior of the paint with (i) the presence of emeraldine salt structure in PANI which develops a surface pH in a range of 4–5 preventing the adhesion of microorganisms on the surface and (ii) the antibacterial and antifouling properties of zinc oxide nanorods that occurred by the production of hydrogen peroxide on the surface of the coating. Note de contenu : - MATERIALS AND METHODS : Materials - Synthesis of ZnO nanorods - Preparation of polyaniline - Preparation of PANI-ZnO nanocomposite - Characterization of synthesized materials - Preparation of epoxy resin containing PANI and PANI-ZnO composite - Evaluation of water uptake, antifouling and antibacterial properties of the coatings
- RESULTS AND DISCUSSION : Characterizations of synthesized materials - Water uptake, antifouling and antibacterial properties of the coatings -DOI : 10.1007/s11998-013-9487-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9487-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19802
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 5 (09/2013) . - p. 679-694[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15618 - Périodique Bibliothèque principale Documentaires Disponible 15679 - Périodique Bibliothèque principale Documentaires Disponible