Three dimensional porous siloxanes using leachable porogen particles
AssigneeLawrence Livermore National Security, LLC
InventorsLemuel Perez Perez, Eric B. Duoss, Jeremy Lenhardt, Thomas S. Wilson
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Abstract
A product of additive manufacturing with a silicone-based ink includes a plurality of continuous filaments comprised of a siloxane matrix, wherein the continuous filaments are arranged in a geometric pattern, a plurality of inter-filament pores defined by the geometric pattern of the continuous filaments, and a plurality of intra-filament pores having an average diameter in a range of greater than 1 micron to less than 50 microns.
Claims18
A product of additive manufacturing with a silicone-based ink, the product comprising:
- a plurality of continuous filaments comprised of a siloxane matrix, wherein the continuous filaments are arranged in a geometric pattern;
- a plurality of inter-filament pores, wherein the inter-filament pores are defined by the geometric pattern of the continuous filaments;
- and
- a plurality of intra-filament pores, wherein the intra-filament pores have an average diameter in a range of greater than 1 micron to less than 50 microns.
A method of forming a three-dimensional printed siloxane structure having intra-filament porosity, the method comprising:
- extruding at least one continuous filament of a mixture through a nozzle to form a structure having at least one continuous filament,
- the mixture comprising a vinyl-terminated siloxane macromer, a hydrophobic filler, a rheology modifying additive, and a plurality of porogen particles;
- curing the extruded mixture to at least a predefined extent to form the three-dimensional printed siloxane structure;
- and
- removing the porogen particles from the three-dimensional printed siloxane structure.
Dependencies are inferred from the claim text.