Non-covalent functionalized hexagonal boron nitride nanoplatelets to improve corrosion and wear resistance of epoxy coatings

Abstract

In the present study, a non-covalent method was employed to modify hexagonal boron nitride (h-BN) nanoplateletsviaπ–π interaction of amine-capped aniline trimer (AT), which resulted in a stable dispersion of h-BN nanoplatelets in organic solvents.

A benzoxazine/substituted borazine composite coating: A new resin for improving the corrosion resistance of the pristine benzoxazine coating applied on aluminum

“…Indeed, from concentrations of 3wt% and higher, the barrier properties of P-pPDA borazine 1 composites appear to be even lower than those of a pristine P-pPDA coating after 21days of immersion. As was shown in the SEM-FEG and AFM micrographs, starting from this concentration, agglomerates are formed, which are susceptible to lead to the formation of defects, just as what is observed in the case of 2wt% h-BN epoxy composite in the literature [12]. Consequently, these defects increase the porosity of the coating lowering its barrier properties.…”

“…In the case of epoxy coatings applied on steel, a recent paper has reported delamination also to occur during the same kind of immersion tests leading to a decrease of corrosion resistance for long times of immersion, reducing the durability of the coating [12,13]. Addition of well dispersed h-BN nanoplatelets in small concentrations -0.5 to 1wt% -in the epoxy matrix appeared to strongly increase the corrosion resistance of the composite making the coating durable.…”

Surface modification of a BN/ETDS composite with aniline trimer for high thermal conductivity and excellent mechanical properties

“…The aniline trimer was prepared following previously reported methods. 12,13,17 Aniline and p-phenylenediamine were dissolved in a 1.0 M HCl solvent in an ice bath at 0 C. A solution of ammonium persulfate in 1.0 M HCl was added to the solution for 30 min, and the reaction solution was stirred in an ice bath for 1 h. Aer the reaction, the product was ltered, washed with an HCl solution, and then cooled to 0 C to collect the crude aniline trimer. The solid product was washed several times with 10% NH 4 OH solution and deionized (DI) water and then washed with HCl.…”

Ångström-Scale, Atomically Thin 2D Materials for Corrosion Mitigation and Passivation

“…Aneja et al [160], Cui et al [188] Brushing An ink-based coating can be brushed on target metallic surface using a brush to form anticorrosive thin film coating. Krishnamoorthy et al [190] EPD During EPD, the electrical attraction between two oppositely charged particles suspended in a solution is utilized to deposit an intrinsic or composite 2D coating.…”