Corrosion protection of carbon steel using hydrotalcite/graphene oxide nanohybrid / Thuy Duong Nguyen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 2 (03/2019)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 2 (03/2019) . - p. 585-595 Titre : Corrosion protection of carbon steel using hydrotalcite/graphene oxide nanohybrid Type de document : texte imprimé Auteurs : Thuy Duong Nguyen, Auteur ; Bo An Tran, Auteur ; Ke Oanh Vu, Auteur ; Anh Son Nguyen, Auteur ; Anh Truc Trinh, Auteur ; Gia Vu Pham, Auteur ; Thi Xuan Hang To, Auteur ; Minh Vuong Phan, Auteur ; Thanh Thao Phan, Auteur Année de publication : 2019 Article en page(s) : p. 585-595 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier au carbone Anticorrosifs Anticorrosion Electrochimie Essais de brouillard salin Hydrotalcites Matériaux hybrides Métaux -- Revêtements protecteurs Oxyde de graphène Index. décimale : 667.9 Revêtements et enduits Résumé : Zinc aluminum hydrotalcite/graphene oxide (HTC-GO) nanohybrid as inhibition additive for organic coatings was prepared using the co-precipitation method. The synthesized HTC-GO was characterized using Fourier-transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy (SEM), transmission electron microscopy, and thermogravimetric analysis. Surface charge properties of HTC-GO were evaluated with zeta potential measurement. The corrosion inhibition effect of HTC-GO on carbon steel in NaCl solution was investigated using electrochemical methods, energy-dispersive X-ray, and SEM. The effect of HTC-GO on corrosion resistance of epoxy coating applied on carbon steel was evaluated by salt spray test. It was shown that hydrotalcite structures were formed on GO surface, subsequently becoming hydrotalcite/graphene oxide nanohybrid. The results obtained by electrochemical measurements indicate that HTC-GO is an anodic corrosion inhibitor with an inhibition efficiency of about 92% at 1 g/L concentration. The presence of intercalated GO improved the barrier properties and adsorption of HTC-GO on steel surface. The corrosion resistance of epoxy coatings was improved with 1 wt% HTC-GO. Note de contenu : - EXPERIMENTAL : Materials - Preparation of graphene oxide - reparation of HTC and HTC-GO - Coating preparation - Analytical characterization - Electrochemical measurements - Corrosion test - RESULTS AND DISCUSSION : Characterization of HTC-GO - Corrosion inhibition effect of HTC-GO - Salt-spray test DOI : 10.1007/s11998-018-0139-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0139-3.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32427 [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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