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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Influence of curcumin-modified graphene oxide on antibacterial properties of polyurethane coating / Nguyen Thuy Duong in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 5 (09/2021)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 5 (09/2021) . - p. 1379-1387 Titre : Influence of curcumin-modified graphene oxide on antibacterial properties of polyurethane coating Type de document : texte imprimé Auteurs : Nguyen Thuy Duong, Auteur ; Van Cuong Bui, Auteur ; Bo An Tran, Auteur ; Thanh Thao Phan, Auteur ; Ke Oanh Vu, Auteur ; Anh Son Nguyen, Auteur ; Anh Truc Trinh, Auteur ; Thi Chinh Tang, Auteur ; Thi Xuan Hang To, Auteur Année de publication : 2021 Article en page(s) : p. 1379-1387 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens Caractérisation Curcumine Essais (technologie) Oxyde de graphène Polyuréthanes Revêtements -- Propriétés physiques Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : This study aims to prepare antibacterial coatings based on polyurethane and curcumin-modified graphene oxide. Curcumin-modified graphene oxide (GO-CU) as an antibacterial agent was prepared using the adsorption method. GO-CU was incorporated in polyurethane (PU) coatings at concentrations of 0.1 and 0.5 wt%. Synthesized GO-CU was characterized by Fourier transform infrared spectroscopy, UV–Vis spectroscopy, transmission scanning electron microscopy, and zeta potential measurement. Curcumin content in GO-CU was determined by thermogravimetric analysis. Antibacterial properties of GO-CU powder and PU coatings containing GO-CU were investigated by counting the colony-forming unit (CFU) of Escherichia coli (E. coli) strain. The results showed that curcumin was attached on GO-CU surface and curcumin content in GO-CU was about 32.9%. GO-CU provided a higher antibacterial effect against E. coli than GO. The antibacterial efficiency of PU coatings containing 0.1 wt% GO-CU was 85.8%; however, the increase in GO-CU concentration did not significantly increase the antibacterial efficiency of PU coating. Note de contenu : - EXPERIMENTAL : Materials - Modification of graphene oxide by curcumin - Preparation of polyurethane coatings containing GO-CU - Analytical characterization - Antibacterial test of GO-CU - Antibacterial test of PU coatings containing GO-CU - RESULTS AND DISCUSSION : Characterization of Go-CU - Morphology of PU coating containing GO-CU - Physical properties of PU coating - Antibacterial ability of GO-CU and PU coating loading GO-CU - Table 1 : Physical properties of coatings DOI : https://doi.org/10.1007/s11998-021-00502-z En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00502-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36440 [article]

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