Multifunctional Polysulfonamide/AgNWs aerogel for electromagnetic interference shielding

Electromagnetic interference (EMI) shielding materials are crucial for high-end electronic products, requiring lightweight, low density, and excellent shielding performance, especially in extreme conditions. In our work, polysulfonamide/silver nanowires (PSA/AgNWs) aerogels with different AgNWs contents and thickness are fabricated. The resultant aerogels show AgNWs with 50–90 nm length are distributed evenly inside the aerogel, and it does not destroy the original 3D network structure of aerogel, maintaining excellent compressive properties (11.2912 kPa), chemical corrosion resistance, heat insulation property (36.47 mW/m·K), and self-cleaning property. PSA/AgNWs-0.5 aerogel with 0.0123 g/cm³ density and 15 mm thickness owns excellent EMI shielding, and its SET value reaches 44.04 dB. When the thickness of PSA/AgNWs-0.5 aerogel is compressed to 5 mm, the SET and SSE values reach 90.78 dB and 7380.49 dB cm³/g. Even if PSA/AgNWs-0.5 aerogel is exposed to acid and alkali conditions, the fluctuation of SET value is little. The superior EMI shielding performance and stability in extreme environments of the resultant PSA/AgNWs aerogel suggests a promising application potential in advanced electronics products.