Degradation of Interfacial Chemistry of Epoxy/Silane/Aluminium Interfaces as a Result of Aqueous Attack

Rattana, Acharawan; Abel, Marie‐Laure; Watts, John F.

doi:10.1080/00218460500222884

Cited by 9 publications

(6 citation statements)

References 12 publications

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“…Therefore, often the failed surfaces after water exposure are investigated by XPS or time of flight secondary ions mass spectroscopy (ToF-SIMS). [51][52][53] It can be concluded that the use of model molecule adsorption provides an easy way to study interactions between functional groups and the substrate, however these monomeric compounds do not have the same bulk properties as polymeric coatings.…”

Section: An In Situ Analysis Of Ionic Interfacial Interactions From M...mentioning

confidence: 99%

Probing the formation and degradation of chemical interactions from model molecule/metal oxide to buried polymer/metal oxide interfaces

et al. 2019

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The mechanisms governing coating/metal oxide delamination are not fully understood, although adhesive interactions at the interface are considered to be an important prerequisite for excellent durability. This review aims to better understand the formation and degradation of these interactions. Developments in adhesion science made it clear that physical and chemical interfacial interactions are key factors in hybrid structure durability. However, it is very challenging to get information directly from the hidden solid/solid interface. This review highlights approaches that allow the (in situ) investigation of the formation and degradation of molecular interactions at the interface under (near-)realistic conditions. Over time, hybrid interfaces tend to degrade when exposed to environmental conditions. The culprits are predominantly water, oxygen, and ion diffusion resulting in bond breakage due to changing acid–base properties or leading to the onset of corrosive de-adhesion processes. Therefore, a thorough understanding on local bond interactions is required, which will lead to a prolonged durability of hybrid systems under realistic environments.

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Section: An In Situ Analysis Of Ionic Interfacial Interactions From M...mentioning

confidence: 99%

Probing the formation and degradation of chemical interactions from model molecule/metal oxide to buried polymer/metal oxide interfaces

et al. 2019

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“…The covalent bond is much more resilient to hydrodynamic degradation than an interface which relies solely on secondary bonds. The primary bond, as opposed to van der Waals bonding, although not necessarily adding to the initial strength of the joint, will ensure that it exhibits good durability throughout its lifetime [6].…”

Section: Introductionmentioning

confidence: 99%

“…Over the last decade, research in the authors' laboratory has led to a much improved understanding of the mode of action of organosilane adhesion promoters, both when applied as a primer layer and when incorporated into the formulation of a structural adhesive [4][5][6][7][8]. One critical observation, made using high spectral resolution time-of-flight secondary ion mass spectrometry (ToF-SIMS), has been the formation of a covalent bond between the organosilane molecule and the oxidised aluminium surface [9].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Interaction and Adsorption of γ-Glycidoxy propyl trimethoxy silane with Grit-Blasted Aluminium: A ToF-SIMS and XPS Study

Shimizu

Abel

Watts

2008

The Journal of Adhesion

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Time-of-flight secondary ion mass spectrometry (ToF-SIMS) and X-ray photoelectron spectroscopy (XPS) have been employed to study the adsorption and interaction of c-glycidoxy propyl trimethoxy silane (GPS) with grit-blasted aluminium.GPS displaces adventitious hydrocarbon either by covalent bond formation between GPS and aluminium, or adsorption, when GPS is deposited on the aluminium. ToF-SIMS fragments present at a nominal mass m=z ¼ 71 were peak-fitted to seven peaks by using CasaXPS Software. AlOSi þ and Si þ were used to establish a relationship between covalent bond formation and the adsorption process. It is found that the adsorption isotherms of Si þ relating to the adsorption of GPS were of the Langmuir type. The interfacial bonding between GPS and aluminium is mainly covalent at low solution concentrations. At higher concentrations (greater than 4.5 Â 10 À4 M) all the sites for the covalent bond formation appear to be occupied while these for the acid-base interaction are still available and then become fully occupied at solution concentrations of 4.5 Â 10 À2 M and above.

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“…Common and practical techniques to evaluate the durability of coated oxide samples are typically accelerated industrial tests (e.g. salt spray, exposure to UV light, or mechanical tests) 11 12 13 14 . These tests are relevant for macroscopic failure and overall performance analysis.…”

mentioning

confidence: 99%

In Situ Characterization of the Initial Effect of Water on Molecular Interactions at the Interface of Organic/Inorganic Hybrid Systems

Pletincx

Trotochaud

Fockaert

et al. 2017

Sci Rep

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Probing initial interactions at the interface of hybrid systems under humid conditions has the potential to reveal the local chemical environment at solid/solid interfaces under real-world, technologically relevant conditions. Here, we show that ambient pressure X-ray photoelectron spectroscopy (APXPS) with a conventional X-ray source can be used to study the effects of water exposure on the interaction of a nanometer-thin polyacrylic acid (PAA) layer with a native aluminum oxide surface. The formation of a carboxylate ionic bond at the interface is characterized both with APXPS and in situ attenuated total reflectance Fourier transform infrared spectroscopy in the Kretschmann geometry (ATR-FTIR Kretschmann). When water is dosed in the APXPS chamber up to 5 Torr (~28% relative humidity), an increase in the amount of ionic bonds at the interface is observed. To confirm our APXPS interpretation, complementary ATR-FTIR Kretschmann experiments on a similar model system, which is exposed to an aqueous electrolyte, are conducted. These spectra demonstrate that water leads to an increased wet adhesion through increased ionic bond formation.

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Degradation of Interfacial Chemistry of Epoxy/Silane/Aluminium Interfaces as a Result of Aqueous Attack

Cited by 9 publications

References 12 publications

Probing the formation and degradation of chemical interactions from model molecule/metal oxide to buried polymer/metal oxide interfaces

Probing the formation and degradation of chemical interactions from model molecule/metal oxide to buried polymer/metal oxide interfaces

Evaluation of the Interaction and Adsorption of γ-Glycidoxy propyl trimethoxy silane with Grit-Blasted Aluminium: A ToF-SIMS and XPS Study

In Situ Characterization of the Initial Effect of Water on Molecular Interactions at the Interface of Organic/Inorganic Hybrid Systems

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