• • The optimized gel with 50 wt% metal loading achieves >98% X-ray shielding efficiency at 5 mm thickness, outperforming lead composites at 120 kV, addressing the need for effective lead-free alternatives.
• • Mechanical robustness: tensile strength of 1.76 MPa, toughness of 6.3 MJ m−3, and elongation of 600%, ensuring durability for flexible shielding applications.
• • Rapid fabrication: gel formation occurs within 1 minute at -20°C using a PVA-DMSO/H2O co-solvent system, enabling scalable and time-efficient production.
• • Anti-freezing capability: retains flexibility at -50°C, expanding operational temperature range for diverse environments.