• • Multilayer MXene/cellulose films achieve absorption-dominated EMI shielding with reflectivity below 0.2, reducing secondary electromagnetic pollution by >50% compared to homogeneous conductive films; this directly addresses impedance mismatch in 5G and wearable devices where surface reflections degrade antenna performance.
• • PBAT composite foams with layered structures demonstrate shielding effectiveness of 25–30 dB at 8–12 GHz with reflectivity <0.3, while maintaining tensile strength >10 MPa and elongation at break >200%; this enables lightweight, flexible shielding for aerospace and portable electronics where metal alternatives fail under cyclic strain.
• • Ferroelectric PVDF-TrFE-MXene composites with surface-patterned architectures exhibit absorption-dominant shielding via electrical polarization and triboelectrification, achieving reflectivity reduction of 40% compared to unpatterned composites; this provides a route to eliminate secondary pollution in medical diagnostic environments where electromagnetic exposure poses health risks.
• • Gradient distribution of segregated conductive networks in PVDF nanocomposites yields outstanding EMI shielding with low reflection, achieving reflectivity <0.15 at 10 GHz while maintaining conductivity sufficient for >30 dB shielding; this demonstrates that controlled filler migration can decouple conductivity from reflectivity, a critical bottleneck in polymer-based shielding.