3d printing of stretchable and compressible foams

A stretchable 3D printed polymeric foam having hyperplastic properties, the foam comprising at least one elastomer and having a predetermined multiscale porosity comprising predesigned macrometric cells connected by porous walls having a random micrometric pore structure, and wherein the macrometric cells are 2 to 50 mm in size and wherein the micrometric pore structure comprising a plurality if pores having a size ranging from 50 nm and 10 μm.

A process for forming a foam or a porous object, the process comprising light curing a resin in a form of a water-in-oil (W/O) emulsion comprising at least one light-curable material to obtain a predesigned 3D porous structure comprising interconnected cells of a size between 2 and 50 mm, wherein walls interconnecting the cells comprise micrometric pores having random sizes ranging between 50 nm and 10 μm and pore distribution.

A 3D printed foam comprising or consisting or consisting essentially polyurethane acrylate, the foam having a multiscale porosity comprising predesigned macrometric cells connected by porous walls having a random micrometric pore structure, wherein the macrometric cells having a size ranging between 2 mm and 50 mm and wherein the micrometric pore structure comprising a plurality of pores having a size ranging between 5 nm and 50 μm.