A controllable heat-absorbing VO2@MXene / epoxy resin anti-corrosion composite coating and its preparation method

By preparing a VO2@Ti3C2Tx MXene/epoxy resin composite coating, the problem of insufficient anti-corrosion performance of epoxy resin coatings in high temperature and high salt environment was solved, and the controllable photothermal performance and anti-corrosion performance were improved, thus extending the service life of the coating.

CN118956233BActive Publication Date: 2026-06-02HUNAN UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUNAN UNIV OF SCI & TECH
Filing Date
2024-06-29
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing epoxy resin coatings have insufficient corrosion resistance in high-temperature and high-salt environments. During long-term use, microcracks and pores are prone to appear, leading to the penetration of corrosive media and affecting corrosion resistance and mechanical properties.

Method used

Ti3C2Tx MXene nanosheets were prepared by LiF etching, and M-phase VO2 nanoparticles were loaded with polydopamine and combined with hyperbranched amide compounds and bisphenol A diglycidyl ether to construct a VO2@Ti3C2Tx MXene/epoxy resin anti-corrosion composite coating, achieving controllable photothermal and anti-corrosion properties.

Benefits of technology

It improves the corrosion resistance and mechanical properties of the coating, extends its service life, and maintains good corrosion resistance, especially in high temperature and high salt environments. It also reduces the temperature rise caused by photothermal conversion and enhances the adhesion between the coating and the substrate.

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Abstract

This invention discloses a controllable endothermic VO2@MXene / epoxy resin anti-corrosion composite coating and its preparation method. The invention first prepares a single-layer Ti3C2T x MXene; then polydopamine (PDA) was used as a binder for monolayer Ti3C2T. x The MXene nanosheets in MXene are coated, which not only improves the mechanical stability of MXene but also provides a large number of "anchor points" as binders to load M-phase VO2 nanoparticles onto Ti3C2T. x VO2@Ti3C2T with controllable light absorption and photothermal conversion was prepared on the MXene surface. x MXene nanosheets; finally, hyperbranched amide compounds, bisphenol A diglycidyl ether, and VO2@Ti3C2T were added. x A VO2@MXene / epoxy resin anti-corrosion composite coating was prepared by uniformly mixing MXene nanosheets. Experimental results show that the controllable endothermic VO2@MXene / epoxy resin anti-corrosion composite coating prepared by this invention has controllable photothermal properties and anti-corrosion properties. Furthermore, the synthesis method of this invention is simple and suitable for widespread application.
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