Abstract:
With the rapid development of electronic devices, the requirements for electromagnetic interference shielding materials have become increasingly rigorous. Materials that merely provide shielding performance are no longer sufficient to meet current demands, which has driven the development of multifunctional materials. In this study, we successfully prepared a composite material (CP-NiFeP/CF) that combines electromagnetic interference shielding and infrared stealth properties by first applying tannic acid (TA) and Fe
3+ (TA-Fe
3+) coatings to carbon fiber (CF) fabric, followed by electroplating a NiFeP layer and applying a copper paste (CP) coating. This material attenuates incident electromagnetic waves through conductive loss, magnetic loss, and multiple internal reflections within the conductive network. At a thickness of 0.38 mm, the material exhibits a conductivity of 8.79 × 10
4 S·m
−1 and achieves an average electromagnetic interference shielding effectiveness (EMI SE) of 94.92 dB in the 30-
1500 MHz frequency range and 111.94 dB in the 8.2-12.4 GHz range. After immersion in a 2wt.% NaCl solution, 100 bending cycles, and 5 hours of ultrasonic treatment, the material still maintained an EMI SE of over 85 dB. Furthermore, the CP-NiFeP/CF composite exhibits excellent infrared stealth. Its average infrared emissivity in the 2.5-16 μm band is 0.21, and when placed on a 200℃ heating stage, its surface temperature remains at only 105.5℃. These results indicate that the CP-NiFeP/CF composite holds great promise for applications in electromagnetic protection and infrared stealth.