The Polymer Society of Korea

Abstract

Microporous polymer networks with bicontinuous morphology offer excellent potential for breathable and stretchable wearable sensors. However, scalable fabrication with uniform pores and stable mechanical properties remains a challenge. Here, we present a facile strategy using polymerization-induced phase separation (PIPS), where precise control of solvent ratios enables the formation of interconnected micropores. The resulting elastomeric films show high porosity, mechanical stability, and enhanced dielectric performance. When applied as the dielectric layer in capacitive pressure sensors, the material exhibited ~725% higher pressure sensitivity than conventional dense films. Furthermore, the porous architecture allows consistent physiological signal monitoring even under high humidity. This study highlights the potential of phase-separated polymer networks as next-generation materials for e-skin and wearable electronics.