One-Pot Fabrication of an MXene-ZrP@PDA Heterojunction for Enhanced Corrosion/Wear Resistance of Waterborne Epoxy Coatings

Abstract

Two-dimensional (2D) materials have a wide range of applications in the field of corrosion protection and wear resistance. The use of MXene (Ti 3 C 2 T x ) in epoxy coatings is limited due to its natural restacking tendency. Herein, MXene-ZrP@ PDA was obtained through the polydopamine (PDA) functionalization of a heterojunction composed of MXene and exfoliated αzirconium phosphate (α-ZrP). MXene-ZrP@PDA (MZP) was incorporated into a waterborne epoxy (WEP) coating to prepare an MZP/WEP composite coating. The results show that the corrosion rate of MZP/WEP (1.70 × 10 −4 mpy) is one order of magnitude lower than that of blank WEP (1.28 × 10 −3 mpy). Moreover, the average coefficient of friction (COF) of the MZP/WEP composite coating decreased by 82.06% compared with that of the blank WEP coating. The results reveal that the addition of MXene-ZrP@ PDA can significantly improve the anticorrosion/antiwear properties of WEP. Our results provide new ideas for the application of MXene/ZrP in the field of metal protection.

BTA-P4444-Lig-Functionalized MXene to Prepare Anticorrosion and Wear-Resistant Integrated Waterborne Epoxy Composite Coating

“…Meanwhile, the P−O stretching vibration peak and the characteristic peak of the benzene ring were observed at 1049 and 1470 cm −1 , respectively. 39,40 The above results indicated that BTA-P 4444 -Lig was successfully loaded into the f-MXene.…”

High-compact MXene-based coatings by controllable interfacial structures

“…In Fig. 4B, compared with previously reported disordered functionalized MXene/EP composite coatings, [9][10][11][12][13][15][16][17][18]21 the OMC coating has the highest SZ value because of its more effectivity and efficiency. This is not only due to the low porosity of the coating matrix, but also due to the optimized "maze effect" of MXene nanosheets by ordered arrangement.…”

“…Covalent bonding and electrostatic adsorption were also combined to enhance the barrier and anticorrosion performance of MXene/EP coatings such as zirconium phosphate (α-ZrP) @MXene hybrids via polydopamine (PDA) functionalization. 21…”

“…Covalent bonding and electrostatic adsorption were also combined to enhance the barrier and anticorrosion performance of MXene/EP coatings such as zirconium phosphate (α-ZrP) @MXene hybrids via polydopamine (PDA) functionalization. 21 Despite these progresses, the orientation of MXene nanosheets is commonly ignored in previous MXene/EP coatings, restricting enhancements in their anticorrosion performance. Sun et al [22][23][24] revealed that the randomly dispersed conductive nanosheets (e.g., graphenes) could form 3D conductive networks in the coating matrix, triggering the galvanic corrosion phenomenon and aggravating the deterioration of coatings and substrates.…”

Anti-corrosion applications of 2D transition metal based layered materials

“…140 We prepared polydopamine (PDA) modified MXene-ZrP composites using a one-pot method and applied the MXene-ZrP@PDA (MZP) heterojunction to enhance the corrosion and wear resistance of waterborne epoxy coatings. 141 The corrosion test results indicated that the corrosion rate of the MZP/WEP composite coating was reduced by an order of magnitude compared with the blank WEP coating. The two-dimensional nanosheet materials can extend the diffusion path of the corrosion media.…”