Flexible and firm multilayer BaFe12O19/GO coated composite fabric for high-performance electromagnetic shielding and wave absorption

With the advent of the 5G era, electromagnetic pollution has become increasingly severe. Developing highperformance electromagnetic shielding materials that are flexible and possess excellent mechanical properties is an ideal choice for modern integrated electronic devices and microwave protection, particularly for lowfrequency electromagnetic waves. Herein, single-layer and double-layer composite fabrics coated with Barium ferrite (BaFe12O19) and Graphene oxide (GO) were prepared using a coating strategy to achieve high shielding and wave absorption capabilities in the low-frequency band. The layered structure of BaFe12O19 and GO enhances interface loss for reflecting and absorbing microwaves. The double-layer coated composite fabric, with GO as the surface coating material and BaFe12O19 as the bottom coating material, achieved a shielding efficiency (SE) of 66.57 dB with a thickness of only 1.1 mm. Additionally, the minimum reflection loss (RL) reached -11.41 dB at 1.33 GHz, demonstrating exceptional electromagnetic protection at low frequencies. Moreover, the GO-BaFe12O19 coated composite fabric exhibited excellent UV resistance, mechanical stability, and infrared stealth protection. The material holds significant implications in the field of electromagnetic protection, especially for personal protective equipment and equipment protection.