Fig. 1: Scalable manufacturing of breathable PMPP hybrid sponge film.

Schematic of preparation process of (a) MXene nanosheets and (b) MXene-based PMPP breathable sponge film. c, d Digital pictures for spools of PU sponge film and PMPP (Scale bars: 3 cm, 5 cm). e Digital picture of kneaded PMPP. f Digital picture of light, porous and thin PMPP (Scale bars: 1 cm).