Efficacy and mechanism of GO/IBTS coating against microbial fouling of concrete surfaces in marine tidal areas

Li, Shaochun; Liu, Jun; Geng, Yun; Liu, Ang; Xu, Aidong; Hou, Dongshuai; Lang, Xiulu

doi:10.1007/s11998-021-00565-y

Cited by 5 publications

(5 citation statements)

References 22 publications

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“…Graphene oxide (GO) is an excellent nanomaterial, as it has successively demonstrated important functions and broad prospects in the field of coating fabrication [15]. So far, GO has been employed as a coating modifier material to improve the barrier and strength of coatings, such as GO and ETEO-modified epoxy resin coatings, GO-modified silane emulsions, GO/ITBS coatings or GO-modified epoxy coatings [16][17][18][19][20], due to its unique properties and highly specific surface area [20,21]. However, GO as a unique coating material has been scarcely reported in the literature [22,23], being this a good starting point for its study.…”

Section: Introductionmentioning

confidence: 99%

Statistical Study of the Effectiveness of Surface Application of Graphene Oxide as a Coating for Concrete Protection

et al. 2023

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Improving the protection of concrete by applying graphene oxide (GO) as a surface treatment has become the objective of the present study. This study focuses on performing a statistical analysis to study different levels of GO application as an exterior coating, thus observing the effectiveness of the coating and the optimization of the treatment material for concrete protection. Four tests were performed to define concrete durability, such as pressurized water penetration, capillary absorption, freeze-thaw resistance and carbonation resistance. The results showed an increase in concrete durability with any level of GO application on the surface, considering that the optimum amount of application for water impermeability and freeze-thaw resistance is 26.2 µg/cm2, since it was possible to reduce pressurized water penetration by 45%, capillary water absorption by 57% and freeze-thaw detachment by 25%. However, the optimum application rate for carbonation resistance is 52.4 µg/cm2, reducing carbonation by almost 60%. In conclusion, if the concrete is going to be exposed to less aggressive environments, the application of a mild surface coating of GO is sufficient for its protection, and if the concrete is going to be exposed to more aggressive environments, it is necessary to increase the amount of GO. The performance of GO as a coating significantly increased the degree of protection of the concrete, increasing its service life and proving to be a promising treatment for concrete surface protection.

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Section: Introductionmentioning

confidence: 99%

Statistical Study of the Effectiveness of Surface Application of Graphene Oxide as a Coating for Concrete Protection

et al. 2023

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“…Liu [ 83 ] found that incorporating GO effectively improves fly ash concrete pavement’s crack and abrasion resistance. Li [ 84 ] experimented with the biological contamination of graphene concrete and believed that the GO coating significantly reduced the surface energy and roughness of the concrete surface and inhibited the pollution of the concrete surface and growth of marine microorganisms. In addition, graphene materials’ excellent electrical and thermal conductivity provides new possibilities for crack control and self-healing of concrete, as shown in Figure 6 .…”

Section: Durabilitymentioning

confidence: 99%

Recent Progress of Cement-Based Materials Modified by Graphene and Its Derivatives

Zhao

Zhang

2023

Materials

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Graphene, with its excellent properties and unique structure, has been extensively studied in the context of modifiable cement-based materials. However, a systematic summary of the status of numerous experimental results and applications is lacking. Therefore, this paper reviews the graphene materials that improve the properties of cement-based materials, including workability, mechanical properties, and durability. The influence of graphene material properties, mass ratio, and curing time on the mechanical properties and durability of concrete is discussed. Furthermore, graphene’s applications in improving interfacial adhesion, enhancing electrical and thermal conductivity of concrete, absorbing heavy metal ions, and collecting building energy are introduced. Finally, the existing issues in current study are analyzed, and the future development trends are foreseen.

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“…Our research group uses isobutyltriethoxysilane (IBTS) as a monomer, uses GO to modify IBTS, and develops a new type of GO-IBTS composite emulsion. Research found that the GO-IBTS composite emulsion has improved compared with IBTS in terms of waterproof performance, − anti-icing performance, anticarbonization performance, antibacterial properties, and chloride ion permeability, and the protective mechanism is carefully analyzed. In addition, the test found that the mechanical properties of concrete mixed with GO-IBTS emulsion are stronger than those of IBTS.…”

Section: Introductionmentioning

confidence: 99%

Adhesion Performance of Ettringite at the Interface with Silane and GO/Silane: Insights into Molecular Dynamics Simulations

Duan

Zheng

et al. 2023

ACS Omega

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The application of silane in sulfoaluminate cement repair materials can improve its waterproof, permeability, freeze–thaw, and other properties, but it would reduce the mechanical properties of sulfoaluminate cement-based materials, making it unable to better meet the engineering requirements and durability indices. The modification of silane with graphene oxide (GO) can effectively address this issue. However, the failure mechanism of the interface between silane and sulfoaluminate cement-based materials and the modification mechanism of GO remain unclear. In this paper, the interface-bonding mechanical models of isobutyltriethoxysilane (IBTS)/ettringite and GO-IBTS/ettringite are established by molecular dynamics method to study the source of interface-bonding properties of IBTS, GO-IBTS, and ettringite, as well as the failure mechanism of interface bonding, to reveal the mechanism of GO-modifying IBTS to improve the interface-bonding properties of IBTS and ettringite. This study finds that the bonding properties of the IBTS, GO-IBTS, and ettringite interface are derived from the amphiphilic nature of IBTS, which can only produce unilateral bonding with ettringite, thus becoming a weak link in interface dissociation. The double-sided nature of GO functional groups enables GO-IBTS to interact well with bilateral ettringite, thus enhancing the interface-bonding properties.

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Efficacy and mechanism of GO/IBTS coating against microbial fouling of concrete surfaces in marine tidal areas

Cited by 5 publications

References 22 publications

Statistical Study of the Effectiveness of Surface Application of Graphene Oxide as a Coating for Concrete Protection

Statistical Study of the Effectiveness of Surface Application of Graphene Oxide as a Coating for Concrete Protection

Recent Progress of Cement-Based Materials Modified by Graphene and Its Derivatives

Adhesion Performance of Ettringite at the Interface with Silane and GO/Silane: Insights into Molecular Dynamics Simulations

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