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Protection Efficacy of TEOS/IBTS Coating on Microbial Fouling of Concrete in Marine Tidal Areas |
LIU Jun1, GENG Yongjuan1, LI Shaochun1(), XU Ailing2, HOU Dongshuai1, LIU Ang1, LANG Xiulu2, CHEN Xu3, LIU Guofeng1 |
1.School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China 2.School of Environment and Municipal Engineering, Qingdao University of Technology, Qingdao 266033, China 3.China Construction Western Construction Company Limited Xinjiang Company, Urumqi 830000, China |
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Abstract The composite emulsion of ethyl orthosilicate (TEOS) and isobutyltriethoxysilane (IBTS) was prepared by a sol-gel method. The TEOS/IBTS composite coating was applied on concrete surface, which then was placed on the marine tidal zone to experience biofouling process. The results show that the TEOS/IBTS composite coating provides a long-term hydrophobic effect on the concrete surface. Hence, it is difficult for marine microorganisms to adhere on the TEOS/IBTS composite coated concrete surface, thereby, the formation of a microbial membrane may be retarded. High-throughput DNA sequencing results show that the application of the TEOS/IBTS composite coating reduced the species richness and community diversity of microorganisms on the concrete surface. In particular, the abundance levels of Desulfobacterota and Firmicutes, which are prone to cause concrete corrosion, were significantly reduced. Furthermore, the bacterial community structure on concrete surface was improved. CLSM and SEM results show that the TEOS/IBTS composite coating improved the surface morphology and characteristics of the concrete, thereby reduced the fouling degree of the concrete in marine environment.
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Received: 10 December 2020
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Fund: National Natural Science Foundation of China(51778308);Open Fund of Jiangsu Provincial Key Laboratory of Civil Engineering Materials(CM2016-06) |
Corresponding Authors:
LI Shaochun
E-mail: lishaochun@qut.edu.cn
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About author: LI Shaochun, E-mail: lishaochun@qut.edu.cn
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Cite this article:
LIU Jun, GENG Yongjuan, LI Shaochun, XU Ailing, HOU Dongshuai, LIU Ang, LANG Xiulu, CHEN Xu, LIU Guofeng. Protection Efficacy of TEOS/IBTS Coating on Microbial Fouling of Concrete in Marine Tidal Areas. Journal of Chinese Society for Corrosion and protection, 2022, 42(1): 135-142.
URL:
https://www.jcscp.org/EN/10.11902/1005.4537.2020.261 OR https://www.jcscp.org/EN/Y2022/V42/I1/135
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