Rapidly Prepared Flexible, Hydrophobic, and Enhanced Electromagnetic Absorption Fabrics with rGO@SrFe12O19 Nanocomposites

Given the increasing demand for high electromagnetic wave absorption (EMA) flexible materials with excellent electromagnetic attenuation features, in this study, reduced graphene oxide@strontium ferrite (rGO@SrFe₁₂O₁₉) was prepared via a solvothermal reaction and mixed with waterborne polyurethane to obtain EMA slurry and then printed on polyester fabric substrate using facile screen printing. The good electromagnetic effect between rGO and SrFe₁₂O₁₉, which endows the material favorable electromagnetic properties, results in superior EMA performance with a minimum reflection loss of −74.82 dB at thickness of 4.18 mm and an effective absorption bandwidth covering the X-band. Synchronously, the good flexibility of polyester-based EMA material and the simple building method by screen printing significantly broaden the application potential of such flexible EMA material. In summary, this low-cost, flexible, and high-performance EMA material fabricated through a facile and scalable preparation process demonstrates significant application prospects in civilian domains.