▎ 摘　　要

In recent years, microwave absorbing (MA) materials have developed rapidly and made good progress. However, MA materials with thin thickness and light weight are still a huge challenge. Furthermore, the application of single-function MA materials is severely restricted due to poor environmental adaptability in actual use, especially in harsh marine environments. Herein, we prepared graphene oxide/chiral polypyrrole hybrid (GO/CPPy) materials, which showed microwave absorbing properties combined with anticorrosion performance, by in situ polymerization. The sheet-layer GO/CPPy was composed of chiral helical polypyrrole and two-dimensional GO sheets. The introduction of chiral polypyrrole not only brought good dielectric loss but also produced additional magnetic loss. As a result, the GO/CPPy hybrids indicated a strong reflection loss (RL) of -55.5 dB at 8.55 GHz with a thickness of 3.8 mm. Meanwhile, they exhibited a broad effective bandwidth of 8.4 GHz from 9.1 to 17.5 GHz. In addition, 0.6% GO/CPPy-EP composite coatings displayed excellent long-term corrosion resistance with a remarkable corrosion protection capability (99.73%) after 21 days of immersion in a corrosive medium. Furthermore, the corresponding 6% GO/CPPy-EP microwave absorbing coatings retained high MA performance with a minimum RL of -27.5 dB at 12.38 GHz, which was tested using a bow reflectivity test system after immersion in 3.5% NaCl solution for 21 days. Moreover, the MA performance dropped only by 13.79%. This work could open new avenues toward the development of MA materials with corrosion protection performance.