Modified bis-(3-(3-(3-triethoxysilyl)propyl)thioureido)propyl terminated poly(dimethylsiloxane)/POSS protective coatings on AA 2024

Šurca, Angelja Kjara; Rauter, Aleksander; Rodošek, Mirjana; Perše, Lidija Slemenik; Koželj, Matjaž; Orel, B.

doi:10.1016/j.porgcoat.2016.11.023

Cited by 10 publications

(1 citation statement)

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“…Grard et al used silane and reactive polysiloxane to silanize the surface of AA6061 and enhanced the adhesion between a high consistency silicone rubber (HCR) and AA6061, improving its protective properties [ 27 ]. Angelja et al, used bis-(3-(3-(3-triethoxysilyl)propyl) thioureido)propyl-terminated polydimethylsiloxane to improve the protective properties of a coating on AA2024 Al alloy with similar results [ 28 ]. Among silane coupling agents, an agent known to have a general structural formula is (RO)3-Si-Y (Y represents organic functional group with amino groups; OR represents alkoxy groups); it can provide active sites for bonding different interfaces and shows great potential on the application of primers.…”

Section: Introductionmentioning

confidence: 99%

The Synergistic Effects of Aminosilane Coupling Agent on the Adhesion Performance of Silane Primer for Silicone Resin Thermal Protection Coating

Pan

Zhu³

et al. 2023

Polymers

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As a bridge between the coating and the substrate, the primer has a direct impact on the adhesion performance of silicone resin thermal protection coating. In this paper, the synergistic effects of an aminosilane coupling agent on the adhesion performance of silane primer were investigated. The results show that silane primer containing N-aminoethyl-3-aminopropylmethyl-dimethoxysilane (HD-103) formed a continuous and uniform film on the surface of the substrate. Two amino groups of HD-103 were conducive to moderate and uniform hydrolysis of the silane primer system, and the introduction of dimethoxy groups was more conducive to the improvement of interfacial layer density and the formation of the planar surface structure, thus enhancing the bond strength at the interface. When the content was 13 wt%, it exhibited excellent synergistic effects on adhesive properties, and the adhesive strength reached 1.53 MPa. The possible morphology and composition of the silane primer layer were investigated by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). A thermogravimetric infrared spectrometer (TGA-IR) was used to analyze the thermal decomposition of the silane primer layer. The results showed that the alkoxy groups in the silane primer were first hydrolyzed to form Si-OH, and then the dehydration and condensation reactions between Si-OH and the substrate formed a firm network structure.

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Section: Introductionmentioning

confidence: 99%