2023
DOI: 10.1021/acs.jpcc.2c06797
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Interfacial Degradation of Calcium Silicate Hydrate and Epoxy under a Hygrothermal Environment: An Experimental and Molecular Model Study

Abstract: The adhesion at the concrete/epoxy interface is crucial to the reinforcement of carbon fiber-reinforced polymer (CFRP) sheets. The multiscale mechanism of adhesion, particularly under a hygrothermal environment, yet remains largely unclear. This paper combines molecular dynamics (MD) and synthesis experiments of a novel single-phase calcium silicate hydrate (C-S-H) and epoxy composite to investigate the combined effects of aggressive chemicals and temperature on the bonding properties. MD models were construct… Show more

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Cited by 20 publications
(2 citation statements)
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“…Hydrogen bonding is a type of intermolecular interaction force formed between a hydrogen atom and an atom with a higher electronegativity, such as F, O, or N [57,58]. In this study, hydrogen bonding indirectly characterizes the interaction between the C-S-H surface and water molecules.…”
Section: Hydrogen Bondmentioning
confidence: 98%
“…Hydrogen bonding is a type of intermolecular interaction force formed between a hydrogen atom and an atom with a higher electronegativity, such as F, O, or N [57,58]. In this study, hydrogen bonding indirectly characterizes the interaction between the C-S-H surface and water molecules.…”
Section: Hydrogen Bondmentioning
confidence: 98%
“…In addition, the water molecules may react with the polar functional groups, leading to the recombination of polymer chains and changing the chemical structure of the coating, resulting in swelling phenomenon (Bouvet et al, 2016, Yang et al, 2002. On the other hand, the water molecules in the pores of the mortar substrate were heated at a higher ambient temperature and generated thermal motion, which may result in an upward expansion act on the coating (Luo et al, 2023). Therefore, these two actions of water may lead to the debonding at the coating-mortar interface.…”
Section: Surface Appearance Changesmentioning
confidence: 99%