• • Achieves ultrahigh proton conductivity of 2.71 × 10−1 S cm−1 at 25 °C and retains 1.06 × 10−2 S cm−1 at −40 °C, enabling reliable operation in extreme cold for wearable devices.
• • Incorporation of zwitterionic SBMA and phytic acid synergistically enhances PW12 loading and dispersion, overcoming interfacial incompatibility that typically plagues POM-polymer hybrids.
• • The dual-network PVA/P(SBMA-AM) matrix provides high stretchability and self-healing capability, essential for durable flexible electronics subjected to repeated mechanical deformation.
• • Demonstrates effective antibacterial activity and excellent biocompatibility, broadening applicability in biomedical wearable sensors and implantable devices.