Bioinspired microporous elastomer with enhanced and tunable stretchability for strain sensing device

In this paper, we report a large-area, microporous polydimethylsiloxane (M-PDMS) membrane with maximum enhancement of fracture strain by 210% over the bulk PDMS (B-PDMS) film. The three-dimensional microporous structures, which contributes to the stretchability enhancement by underlying physical analysis, are fabricated by removing monodisperse polystyrene (PS) sphere arrays in PDMS matrix. Integrated with the capacitive strain sensor, the as-fabricated M-PDMS membrane is demonstrated as stretchable substrate for large or even extreme strain detection and human motion recognition.