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US 12,577,361 B2Granted
Biodegradable foams
AssigneeCruz Foam, Inc.
InventorsXiaolin Zhang, Marco Rolandi, John Felts
Life of this patent
Estimating the term…
Abstract
A composite material includes a polymer matrix with a polymer having D-glucosamine monomer units and 50% or fewer N-acetyl-D-glucosamine monomer units. A salt can be disposed in the polymer matrix. A dispersed phase is disposed in the polymer matrix with the salt, and the dispersed phase and the polymer matrix form a porous composite foam. The porous composite foam includes, by weight, 0.5-3 times the dispersed phase to the polymer matrix, and the porous composite foam has a density of less than 1 g/cm3.
Claims21
A composite material, comprising:
- a polymer matrix including chitosan, wherein the polymer matrix is greater than 50% chitosan;
- a dispersed phase disposed in the polymer matrix, wherein the dispersed phase includes starch, wherein the dispersed phase and the polymer matrix form a porous composite foam wherein the porous composite foam has a density of less than 1 g/cm3, wherein an average pore size of pores of the porous composite foam is from 200 μm to 800 μm,
- wherein the dispersed phase further includes chitin, and wherein the porous composite foam includes, by weight, 0.5-2.5 times the chitin of the dispersed phase to the chitosan of the polymer matrix.
A composite material, comprising:
- a polymer matrix including chitosan, wherein the polymer matrix is greater than 50% chitosan;
- and
- a dispersed phase disposed in the polymer matrix, wherein the dispersed phase includes chitin, wherein the dispersed phase and the polymer matrix form a porous composite foam, wherein the porous composite foam includes, by weight, 0.5-2.5 times the chitin of the dispersed phase to the chitosan of the polymer matrix, and wherein the porous composite foam has a density of less than 1 g/cm3.
Dependencies are inferred from the claim text.