Abstract: A polyolefin-based ink for additive manufacturing includes a polyolefin copolymer having a molecular weight no more than five times the entanglement molecular weight of the polyolefin copolymer, wherein the polyolefin copolymer comprises at least one type of functional group for crosslinking. A product of additive manufacturing with a polyolefin-based ink includes a three-dimensional structure including an extruded continuous filament arranged in a predefined pattern. The continuous filament includes a polyolefin matrix having a microstructure, where the microstructure is retained after curing.

Abstract: An ink includes a siloxane polymer having at least 13 mol. % diphenylsiloxane content relative to the total mol. % of the siloxane polymer, and a filler having a refractive index about matching a refractive index of the siloxane polymer where the refractive indices are within about 5% of one another but are ideally as closely matched as possible.

Abstract: An ink includes a vinyl-terminated polydimethylsiloxane polymer, a polydimethylsiloxane copolymer having a hydride component, wherein a hydride to a vinyl ratio (hydride:vinyl) is in a range of greater than 1:1 to about 4:1, a hydrophobic filler, a crosslinking agent, and a carbon dioxide-binding component. A method includes extruding an ink for forming a three-dimensional (3D) structure, the ink including a vinyl-terminated polydimethylsiloxane polymer, a polydimethylsiloxane copolymer having a hydride component, wherein a hydride to a vinyl ratio (hydride:vinyl) is in a range of greater than 1:1 to about 4:1, a hydrophobic filler, a crosslinking agent, and a carbon dioxide-binding component. The method further includes curing the 3D structure for forming a silicone polymer product having the carbon dioxide-binding component.

Abstract: A product includes a porous three-dimensional printed structure having printed filaments arranged in a geometric pattern. The printed filaments include a material having a plurality of gas-filled microballoons. The printed structure has hierarchical porosity including an inter-filament porosity defined by the arrangement of the printed filaments, and an intra-filament porosity of the material. The intra-filament porosity is defined by the plurality of gas-filled microballoons in the material of the printed filament.