Polyaniline nanoparticles intercalated Ti3C2 MXene reinforced waterborne epoxy nanocomposites for electromagnetic wave absorption and anticorrosion coating applications

• Stable dispersion of polyaniline functionalized Ti 3 C 2 MXene (PANI-TM) hybrid in waterborne epoxy (WEP) matrix was achieved. • The |Z| 0.01Hz value of the PANI-TM0.5 % was 1.2369 × 106 Ω·cm 2 , which was one order of magnitude larger than WEP coating. • The composites revealed an excellent corrosion resistance. • PANI-TM show excellent electromagnetic wave absorption property and can absorb 90% of the waves. Ti 3 C 2 MXene (TM) has great application potential in the field of wave absorption and corrosion resistance due to its unique performance, such as high specific surface area, high electrical conductivity, excellent mechanical and good chemical stability. However, it is difficult to obtain uniformly dispersed TM in the resin matrix due to rapid agglomeration behavior. It is difficult to obtain uniformly dispersed Ti 3 C 2 MXene (TM) in the resin matrix due to rapid agglomeration behavior. Herein, a novel method is presented to improve the corrosion protection and dispersion of TM by polymerizing polyaniline (PANI) nanoparticles between layers. The waterborne epoxy (WEP) coating with PANI-TM had high mechanical properties including impact resistance, adhesion, and flexibility and wear resistance. The PANI-TM-WEP composites can effectively absorb more than 90 % of the electromagnetic waves and demonstrate a decreased glass transition temperature of WEP from 128.0 to 107.6 ℃. Moreover, the |Z| 0.01Hz value of the PANI-TM 0.5 % was 1.2369 × 10 6 Ω·cm 2 , which was one order of magnitude larger than WEP coating. The high-performance anticorrosion of PANI intercalated TM coating is attributed to the synergistic effect of impermeable TM nanosheets and passivation effect of PANI. Therefore, PANI-TM is a potential choice for applications in the fields of anticorrosion and microwave absorption.