Water-soluble salt particle containing compositions and porous materials made therefrom

Patent metadata

Field	Value
Publication number	US-2024100226-A1
Application number	US-202318380350-A
Country	US
Kind code	A1
Filing date	Oct 16, 2023
Priority date	Nov 28, 2017
Publication date	Mar 28, 2024
Grant date	—

Abstract

Compositions for forming porous materials and three-dimensional objects, including fibers, films and coatings made from the materials are provided. Also provided are methods for forming the porous objects from the compositions. The compositions include a solvent, a polymer binder that is soluble in the solvent, and solid particles that are insoluble in the solvent. The solid particles include water-soluble salt particles that can be selectively dissolved from objects made from the compositions to render the resulting structures porous.

First claim

What is claimed is:

1 . (canceled)

2 . A composition for use in forming a porous material, the composition comprising:
a solids content comprising:
solid particles, at least some of the solid particles being expandable water-soluble salt particles and at least some of the solid particles not dissociating in water; and
a polymer, the polymer acting as a binder for holding the solid particles together;
the solid particles being at least 20 vol. % of the solids content; and the expandable water-soluble salt particles being between about 20 and about 80 vol. % of the solid particles, not dissociating in a salt-hydrating solution, and being expandable by at least 10% in volume, relative to their original volume, when exposed to the salt-hydrating solution.

3 . The composition as in claim 2 , the expandable water-soluble salt particles being expandable by at least 20% in volume, relative to their original volume, when exposed to the salt-hydrating solution.

4 . The composition as in claim 2 , the expandable water-soluble salt particles being expandable by at least 30% in volume, relative to their original volume, when exposed to the salt-hydrating solution.

5 . The composition as in claim 2 , the expandable water-soluble salt particles being expandable by about 36% in volume, relative to their original volume, when exposed to the salt-hydrating solution.

6 . The composition as in claim 2 , the expandable water-soluble salt particles being between about 40 and about 60 vol. % of the solid particles.

7 . The composition as in claim 2 , wherein the solid particles that do not dissociate in water are selected from a group consisting of covalent solids, ionic solids, and metallic solids.

8 . The composition as in claim 2 , wherein the expandable water-soluble salt particles comprise CuSO 4 .

9 . The composition as in claim 2 , wherein the polymer comprises polylactic-co-glycolic acid (PLGA).

10 . The composition as in claim 2 , about 70 vol. % of the solids content being CuSO 4 .

11 . The composition as in claim 2 , the solids content comprising:
about 30 vol. % PLGA; about 35 vol. % CuSO 4 ; and about 35 vol. % a material selected from a group consisting of nickel (Ni) metal, yttria-stabilized zirconia (YSZ) ceramic, and graphene (Gr).

12 . A method of making the composition of claim 2 , the method comprising:
mixing the solid particles and the polymer with a solvent, the polymer being substantially soluble in the solvent, and the solid particles not dissociating in the solvent.

Assignees

• Univ Northwestern

Inventors

• Jakus Adam E
• Shah Ramille N
• Geisendorfer Nicholas R

Classifications

• A61L27/56 Primary

  Porous materials, {e.g. foams or sponges} · CPC title

• A61L27/18

  obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• A61L27/446

  with other specific inorganic fillers other than those covered by A61L27/443 or A61L27/46 · CPC title

• C08J9/26

  by elimination of a solid phase from a macromolecular composition or article, e.g. leaching out · CPC title

• C08L67/04

  Polyesters derived from hydroxycarboxylic acids, e.g. lactones (C08L67/06 takes precedence) · CPC title