Evidence of covalent bond formation at the silane–metal interface during plasma polymerization of bis-1,2-(triethoxysilyl)ethane (BTSE) on aluminium

Batan, Abdelkrim; Mine, N.; Douhard, Bastien; Brusciotti, Fabiola; Graeve, I. De; Vereecken, Jean; Wenkin, Mireille; Piens, Marcel; Terryn, Herman; Pireaux, J. J.; Reniers, François

doi:10.1016/j.cplett.2010.05.002

Cited by 21 publications

(11 citation statements)

References 20 publications

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“…Furthermore, it is assumed that Si-O-Me covalent bonds are generated in a similar way, which is indirectly supported by the observed adhesion strength improvement (for additional support, see ref. [43] ). The conventional mechanism for a sol-gel siloxane film formation (wet chemistry approach) is well known and reported in several papers.…”

Section: Discussionmentioning

confidence: 93%

“…[40][41][42] A plasma deposited siloxane layer can act as an interfacial modifier for improving adhesion and corrosion resistance creating chemical bonds between the siloxane and metal interface. [43] The deposition of polyhydrogenmethylsiloxane and tetraethyl orthosilicate on SS substrates improved the adhesion strength towards silicon elastomers. [44] The main goal of this study is to deposit a siloxane layer on a SS surface through DBD process.…”

Section: Introductionmentioning

confidence: 99%

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Adhesion Improvement between Epoxy and Stainless Steel Using a Silane Coupling Agent in an Atmospheric Plasma Process

Ponte

Ghosh

Kakaroglou

et al. 2014

Plasma Process. Polym.

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3‐Aminopropyltriethoxysilane coatings have been deposited on stainless steel (SS) samples by means of an atmospheric pressure dielectric barrier discharge as an adhesive promotion layer in epoxy resin/SS composites. A multi‐diagnostic analytical approach (FTIR, XPS) was used for the chemical characterization of the deposited coating with regard to improvement of adhesively bonded joint strength. The effect of a plasma post‐treatment after the plasma coating deposition was compared to a thermal post‐treatment. Both enhanced the siloxane networking resulting in a significant adhesion improvement. Fracture strength between SS and epoxy was increased with more than 20 MPa.

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Section: Discussionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Adhesion Improvement between Epoxy and Stainless Steel Using a Silane Coupling Agent in an Atmospheric Plasma Process

Ponte

Ghosh

Kakaroglou

et al. 2014

Plasma Process. Polym.

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“…18,[20][21][22][23][24][25][26][27][28][29][30] The terminal OH groups of the oxihydroxide metallic surface react with silanes that undergo hydrolysis forming polysiloxane (Si-O-Si) bonds and Si-O-substrate bonds. 31,32 The formation of a robust bond of the silanes with the substrate confers a strong stability to the layer and allows further chemical functionalization. 33 Although the best substrates for silane functionalization are those containing Si-OH moieties, metallic oxides are also suitable.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the surface properties of nanostructured Ni–W alloys on steel by a mixed silane layer

Argañaraz

Ramallo‐López

Benítez

et al. 2015

Phys. Chem. Chem. Phys.

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Ni-W nanostructured coatings electrodeposited on steel by galvanostatic pulses were functionalized by tetraethoxysilane (TEOS) and octadecyltrichlorosilane (OTS) in a two-step procedure. A silica-rich layer is formed by the reaction of TEOS with the metal coating surface oxides, which allows a further reaction with OTS forming a hydrocarbon-silica outer network. This mixed silane layer provides hydrophobicity and improves the corrosion behavior of the Ni-W surface coatings without modifying their excellent mechanical properties.

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“…In several studies, SiOM + fragments (M represents Al, Fe or Zn) have been interpreted as direct evidence for covalent Si−O−M bond formation at the metal oxide−silane interface, both for direct access interfaces 5,40,41 and for buried interfaces. 6,7,42 However, the interpretation that SiOM + fragments can be considered as a proof for covalent bonding is under discussion. 43 In our analysis, it is remarkable in the NMF analysis (Figure 4) that SiOFe + is a highly characteristic fragment for the substrate component, as well as for the interface component.…”

Section: Resultsmentioning

confidence: 99%

Molecular Characterization of Bonding Interactions at the Buried Steel Oxide–Aminopropyl Triethoxysilane Interface Accessed by Ar Cluster Sputtering

et al. 2020

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The overall performance of any organic coating system on a metal is largely dependent on the primer coating which has the crucial function to ensure adhesion to the metal substrate. Although performance in terms of adhesion can be empirically measured, the underlying chemical adhesion mechanism is dicult to unravel. A detailed molecular characterization of interfacial chemistry is required for this purpose, but brings up the challenge to reach the buried interface without inducing excessive damage to its molecular structure. In this work, argon gas cluster ions are being applied to sputter through an aminosilane coating on steel, in order to access the steel oxide 1 silane interface with time-of-ight secondary ion mass spectrometry (ToF-SIMS). In-situ atomic force microscopy (AFM) measurements during the sputter process demonstrate the importance of optimizing the Ar gas cluster ion beam in order to minimize sputter induced roughness and molecular damage. ToF-SIMS spectra obtained at the buried steel oxide aminosilane interface accessed by sputtering were compared to spectra from a steel oxide aminosilane interface that was directly accessible without the need for sputtering. This comparison allowed to identify contributions from sputter induced damage in the buried interface spectra. Fragments characteristic for interfacial bonding interactions could be extracted, although there is a signicant loss of molecular information due to sputtering. Nevertheless, insights on the role of steel surface hydroxyl groups in the adsorption mechanism of aminosilanes could be obtained through deuteration of the steel substrate.

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Evidence of covalent bond formation at the silane–metal interface during plasma polymerization of bis-1,2-(triethoxysilyl)ethane (BTSE) on aluminium

Cited by 21 publications

References 20 publications

Adhesion Improvement between Epoxy and Stainless Steel Using a Silane Coupling Agent in an Atmospheric Plasma Process

Adhesion Improvement between Epoxy and Stainless Steel Using a Silane Coupling Agent in an Atmospheric Plasma Process

Optimization of the surface properties of nanostructured Ni–W alloys on steel by a mixed silane layer

Molecular Characterization of Bonding Interactions at the Buried Steel Oxide–Aminopropyl Triethoxysilane Interface Accessed by Ar Cluster Sputtering

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