Graphene-Based EMI Shielding Textile
topic
Graphene-coated textiles for electromagnetic interference (EMI) shielding apply rGO (sheet resistance 10–100 Ω/sq) via dip-coating (3–5 cycles in 2–5 mg/mL GO dispersion) followed by chemical reduction with L-ascorbic acid (10 mg/mL, 90°C, 2h) achieving conductivity of 50–500 S/m. EMI shielding effectiveness (SE) of 20–50 dB across 1–18 GHz (IEEE 299-2006) is achieved at 1–3 g/m² rGO loading on polyester woven substrate. Shielding mechanism is predominantly absorption (70–85%) rather than reflection, preferred for medical device environments. Wash durability of 30–50 cycles at 40°C with PDMS overcoat binder. Applications include 5G signal shielding garments, medical implant patient gowns, and military electronic countermeasure uniforms at fabric cost of $15–40/m².
Role
Provides lightweight, flexible EMI shielding for wearable electronics integration and military electronic protection, replacing heavy metallic shielding materials with graphene-coated textile alternatives at 90% weight reduction.