Cationic UV-cured epoxy coating with inhibitor-loaded nanoparticles: photoinitiated cationic polymerization, mechanical properties and corrosion protection of steel / Thien Vuong Nguyen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 3 (05/2024) . - p. 1113-1124 Titre : Cationic UV-cured epoxy coating with inhibitor-loaded nanoparticles: photoinitiated cationic polymerization, mechanical properties and corrosion protection of steel Type de document : texte imprimé Auteurs : Thien Vuong Nguyen, Auteur ; Vy Do Truc, Auteur ; Tuan Anh Nguyen, Auteur ; Dai Lam Tran, Auteur Année de publication : 2024 Article en page(s) : p. 1113-1124 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique. L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1. C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple. Anticorrosifs Caractérisation Dioxyde de silicium Enrobage (technologie) Epoxydes Essais de brouillard salin Formulation (Génie chimique) Inhibiteurs (chimie) Métaux -- Revêtements protecteurs Nanoparticules Photoamorceurs (chimie) Polyaddition Revêtements -- Propriétés mécaniques Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : This work aims to explore how the cationic UV-curing technology can be applied for corrosion protection of metals. For this purpose, the cationic UV-curing epoxy coating is prepared on the steel surface, with addition of the inhibitor-loaded nanoparticles. To reveal the effect of Ce-loaded SiO2 nanoparticles on the photoinitiated cationic polymerization of epoxy coating, various measurements have been carried out during the UV irradiation, such as the consumption of photoinitiator (triarylsulfonium hexafluoroantimonate salts, TAS), conversion of epoxy groups, gel fraction, swelling degree and relative hardness of coating samples. To evaluate the effect of Ce-loaded SiO2 nanoparticles on mechanical and anticorrosion properties of UV-cured epoxy coating, the impact strength, abrasion resistance, electrochemical impedance spectroscopy and salt spray tests have been carried out and analyzed. The experimental data indicate that the incorporation of Ce-loaded SiO2 nanoparticles into epoxy matrix reduces both the relative hardness, gel fraction and the conversion of TAS photoinitiator and epoxy groups. However, the presence of these nanoparticles increases both impact strength, abrasion resistance and anticorrosion performance of the cationic UV-cured epoxy coating. Note de contenu : - EXPERIMENTAL SECTION : Materials - Fabrication of cationic UV-curing epoxy coatings - Coating characterization - RESULTS AND DISCUSSIONS : UV-initiated cationic polymerization of epoxy coating - Morphology and mechanical properties of cationic UV-cured epoxy coatings - Effect of SiO2@Ce3+ nanoparticles on the corrosion protection of UV-cured epoxy coating - Salt spray test - Table 1 : Coating formulations of the cationic UV-curing epoxy coatings DOI : https://doi.org/10.1007/s11998-023-00878-0 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00878-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41080 [article]

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Synthesis of conducting PANi/SiO2 nanocomposites and their effect on electrical and mechanical properties of antistatic waterborne epoxy coating / Anh Son Nguyen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 2 (03/2020)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 2 (03/2020) . - p. 361-370 Titre : Synthesis of conducting PANi/SiO2 nanocomposites and their effect on electrical and mechanical properties of antistatic waterborne epoxy coating Type de document : texte imprimé Auteurs : Anh Son Nguyen, Auteur ; Thuy Duong Nguyen, Auteur ; Thu Thuy Thai, Auteur ; Anh Truc Trinh, Auteur ; Gia Vu Pham, Auteur ; Hoang Thai, Auteur ; Dai Lam Tran, Auteur ; Thi Xuan Hang To, Auteur ; Duy Trinh Nguyen, Auteur Année de publication : 2020 Article en page(s) : p. 361-370 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antistatiques Dioxyde de silicium Epoxydes Matériaux hybrides Polyaniline Polymères -- Propriétés électriques Polymères en émulsion Revêtements -- Propriétés mécaniques Revêtements en phase aqueuse -- Additifs Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : Polyaniline (PANi) has been intensively incorporated in epoxy coatings as a conducting material. However, epoxy coatings containing PANi have poor mechanical properties. In this study, polyaniline/silica (PANi/SiO2) nanocomposites with different contents of silica were prepared via in situ chemical oxidative polymerization method. Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), and zeta potential measurements were used to examine the structure and the morphology of synthesized PANi/SiO2 nanocomposites. The thermal and electrical properties of the nanocomposite were studied by thermogravimetric analysis (TGA) and standard four-probe electrode method. It was shown that silica (SiO2) nanoparticles were covered by PANi in PANi/SiO2 nanocomposites and the electrical conductivity of nanocomposites decreased with the increase in SiO2 content. The PANi/SiO2 nanocomposite with 4.1 wt% SiO2 had a conductivity of 7.6 x 10-2 S/cm and that of PANi was 8.7 x 10-2 S/cm. Consequently, epoxy coatings containing 30 wt% PANi/SiO2 nanocomposites displayed a higher surface and volume resistance than the one containing pure PANi. In contrast, the increase in SiO2 content in PANi/SiO2 nanocomposite enhanced the mechanical properties of the epoxy coating, compared to epoxy coating containing pure PANi. The coating containing PANi/SiO2 nanocomposite with 17.2 wt% silica presented good mechanical properties (20 L/mil abrasion resistance, 100 kg cm impact strength) and admissible surface and volume resistivity (1.3 x 1011 Ω/cm2 and 6.6 x 10 10 Ω cm, respectively) for antistatic coatings. Note de contenu : - EXPERIMENTAL : Materials - Preparation of PANi/Sio2 nanocomposites - Preparation of Coatings - Analytical characterization - Conductivity measurement - Mechanical resistance measurement - RESULTS AND DISCUSSION : Characterization of PANi/SiO2 nanocomposite En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00279-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33987 [article]

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