Efficacy and mechanism of GO/IBTS coating against microbial fouling of concrete surfaces in marine tidal areas / Shaochun Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 3 (05/2022)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 3 (05/2022) . - p. 875-885 Titre : Efficacy and mechanism of GO/IBTS coating against microbial fouling of concrete surfaces in marine tidal areas Type de document : texte imprimé Auteurs : Shaochun Li, Auteur ; Jun Liu, Auteur ; Yongjuan Geng, Auteur ; Ang Liu, Auteur ; Ailing Xu, Auteur ; Dongshuai Hou, Auteur ; Xiulu Lang, Auteur Année de publication : 2022 Article en page(s) : p. 875-885 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Corrosion microbienne Isobutyltriethoxysilane Matériaux cimentaires Oxyde de graphène Revêtements antisalissures Revêtements organiques Silanes Sol-gel, Procédé Index. décimale : 667.9 Revêtements et enduits Résumé : In this paper, GO/IBTS composite emulsion was prepared by sol–gel method with graphene oxide (GO) and isobutyltriethoxysilane (IBTS) as raw materials. GO/IBTS composite coating was constructed on the surface of concrete blocks, which were then placed in a marine tidal area for biological fouling experiment. The results show that the GO/IBTS composite emulsion can ensure long-term hydrophobicity of the concrete surface, preventing the adhesion of marine microorganisms and effectively inhibiting the formation of microbial biofilms. High-throughput DNA sequencing results show that the GO/IBTS composite coating can reduce the species richness and community diversity of microorganisms on the concrete surface, especially the abundance of Desulfobacterota and Firmicutes species, which can corrode concrete. The degree of microbial contamination was significantly reduced, and the bacterial community structure was improved by the coating. Microscopy results show that the GO/IBTS composite coating reduces the degree of carbonization of concrete, improves the microstructure of the concrete surface, and reduces the degree of microbial contamination on concrete. Note de contenu : - MATERIALS AND METHODS : Raw materials and preparation of a GO/IBTS composite emulsion - Concrete preparation - Contact angle measurements - Microbial extraction from concrete surfaces - Illumina MiSeq sequencing and data analysis - Analysis of biofilms on the concrete surface - pH values of the concrete surface and analysis of the corrosion product composition - Analysis of the micromorphology of the concrete surface - RESULTS AND DISCUSSION : Influence of the GO/IBTS composite coating on the contact angle of the concrete surface - Influence of the GO/IBTS composite coating on the microbial α-diversity indices for the concrete surface - Influence of the GO/IBTS composite coating on the composition of the microbial community of the concrete surface Influence of the GO/IBTS composite coating on the adhesion of bacteria to the concrete surface - The influence of the GO/IBTS composite coating on the phase composition of the concrete surface The influence of the GO/IBTS composite coating on the surface micromorphology of concrete - Table 1 : Raw materials for the preparation of GO/IBTS composite emulsions - Table 2 : Mixing ratios of prepared concrete (kg/m3) - Table 3 : Bacterial α-diversity indices for the concrete surface - Table 4 : pH values of the concrete surfaces DOI : https://doi.org/10.1007/s11998-021-00565-y En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00565-y.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38082 [article]

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