Air-Stable Titanium Carbide MXene Nanosheets for Corrosion Protection

Abstract

MXene materials have drawn extensive scientific interest in catalysis, batteries, purification, and electromagnetic interference shielding fields; however, their anticorrosion performance is rarely explored mainly because MXene nanosheets are prone to be oxidized under ambient conditions. Herein, we prepared oxidation-resistant and highly stable titanium carbide (Ti3C2T x ) MXene sheets through noncovalent functionalization between MXene and an ionic liquid (IL). The resultant IL@MXene nanosheets were used as a smart barrier enhancer of waterborne epoxy (WEP) to improve the anticorrosion performance of coatings. The impedance modulus of the IL@MXene–WEP coatings with a thickness of 13 μm increased by 1–2 orders of magnitude compared to that of the neat WEP coating, which was supported by potentiodynamic polarization curves and electrochemical impedance spectroscopy measurements. The morphologies of steels protected by the IL@MXene–WEP coatings exhibited less corrosion than the neat WEP, suggesting a satisfactory anticorrosion performance enhancement by the coating. Furthermore, the self-healing properties of the IL@MXene–WEP coating were confirmed using the scanning vibrating electrode technique. Its enhanced protection performance was attributed to the synergistic effects of the exceptional barrier property endowed by well-dispersed MXene nanosheets and the self-repairing property caused by IL passive films. Our work provides a strategy for the design and preparation of MXene smart anticorrosion coatings.

Synthesis of Ultrathin Functional Boron Nitride Nanosheets and Their Application in Anticorrosion

“…1-(3-Aminopropyl)-3-methylimidazolium bromide IL was prepared through the previously described work. 25 Q235 steels were used as electrodes, and the elemental composition can be found in Table S1. All reagents were used as received.…”

“…Waterborne EP and curing agent were provided by Shanghai Runtan New Material Technology Co. Ltd., China. 1-(3-Aminopropyl)-3-methylimidazolium bromide IL was prepared through the previously described work . Q235 steels were used as electrodes, and the elemental composition can be found in Table S1.…”

“…In recent years, ionic liquids (ILs) have drawn people’s attention because of their excellent properties . It is reported that ILs display great potential to act as corrosion inhibitors for protecting metals from corrosion including aluminum, copper, steels, − and so on. In view of this, we here explore a facile and effective way to exfoliate commercial bulk hBN into ultrathin IL-BN nanosheets and uniformly disperse IL-BN nanosheets in EP matrix via IL functionalization, in Figure .…”

Enhancing the Anticorrosion Performance of Graphene–Epoxy Coatings by Biomimetic Interfacial Designs

“…The B-G-EP longitudinal section presents a 2D-layered and hierarchical structure (Figure 1c), with the space between adjacent lamellae being about 20−40 nm. The B-G-EP has a well-oriented structure, leading to an anisotropic architecture, and the selfassembly lamella can form a more tortuous pathway 17 (Figure 1d). Compared to EP (Figure S4a), R-G-EP (Figure S4b) and B-G-EP (Figure S4c) coatings show completely different crosssectional structures.…”

Recent Advances in MXene/Epoxy Composites: Trends and Prospects

“…Zhao et al [ 87 ] prepared noncovalent functionalized Ti 3 C 2 T x MXene nanosheets with 1-(3-aminopropyl)-3-methylimidazolium bromide, an ionic liquid (IL), for waterborne epoxy coatings, to ensure superior oxidative stability of MXene in air. The IL simultaneously served as a high-efficiency corrosion inhibitor to prevent metals from corrosion and as a dispersant of Ti 3 C 2 T x MXene into the epoxy coating.…”