Polymer formulations for extrusion of composite co2 sorbents

Patent metadata

Field	Value
Publication number	US-2022118424-A1
Application number	US-202117504336-A
Country	US
Kind code	A1
Filing date	Oct 18, 2021
Priority date	Oct 21, 2020
Publication date	Apr 21, 2022
Grant date	—

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.

First claim

What is claimed is:

1 . An ink, comprising:
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.

2 . The ink as recited in claim 1 , wherein the vinyl-terminated polydimethylsiloxane polymer has a vinyl content in a range of 0.01 to about 0.10 mole vinyl per kilogram polymer.

3 . The ink as recited in claim 1 , wherein the hydride component is selected from the group consisting of: a methylhydrosiloxane-dimethylsiloxane copolymer, trimethylsiloxy and/or hydride-terminated, hydride-terminated polydimethylsiloxane polymer, trimethylsiloxy-terminated polymethylhydrosiloxane polymer, and a combination thereof.

4 . The ink as recited in claim 1 , wherein the polydimethylsiloxane copolymer having the hydride component has a hydride content in a range of 10 mol. % to 70 mol. % methylhydrosiloxane.

5 . The ink as recited in claim 1 , wherein the filler includes fumed silica.

6 . The ink as recited in claim 5 , wherein the fumed silica has a surface area in a range of about 100 to about 300 m 2 /g.

7 . The ink as recited in claim 1 , wherein the filler is present in the ink at about 5 wt. % to about 50 wt. % relative to the total weight of the ink.

8 . The ink as recited in claim 1 , further comprising an inhibitor.

9 . The ink as recited in claim 1 , further comprising a rheology modifying additive.

10 . The ink as recited in claim 1 , wherein the carbon dioxide-binding component is selected from the group consisting of: a carbonate, a metal organic framework, activated carbon, an amine-based sorbent, and a combination thereof.

11 . The ink as recited in claim 10 , wherein the carbon dioxide-binding component is in powder form.

12 . The ink as recited in claim 10 , wherein the carbon dioxide-binding component is in the form of a plurality of particles having an average diameter in a range of 10 microns to about 500 microns.

13 . A product formed by extrusion of the ink as recited in claim 1 , the product comprising
a three-dimensional structure having physical characteristics of formation by extrusion, wherein the structure is self-supporting, wherein the structure is comprised of filaments having a diameter in a range of greater than 10 micron to about 10 millimeters, wherein the structure is configured to absorb CO 2 .

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

15 . The method as recited in claim 14 , wherein the vinyl-terminated polydimethylsiloxane polymer has a vinyl content in a range of 0.01 to about 0.10 mole vinyl per kilogram polymer.

16 . The method as recited in claim 14 , wherein the hydride component is selected from the group consisting of: a methylhydrosiloxane-dimethylsiloxane copolymer, trimethylsiloxy and/or hydride-terminated, hydride-terminated polydimethylsiloxane polymer, trimethylsiloxy-terminated polymethylhydrosiloxane polymer, and a combination thereof.

17 . The method as recited in claim 14 , wherein the polydimethylsiloxane copolymer having the hydride component has a hydride content in a range of 10 to 70 mol. % methylhydrosiloxane.

18 . The method as recited in claim 14 , wherein the filler includes a fumed silica.

19 . The method as recited in claim 14 , wherein the ink further comprises an inhibitor.

20 . The method as recited in claim 14 , wherein the ink is extruded by a direct ink writing device.

21 . The method as recited in claim 14 , wherein the ink is extruded as a continuous filament to form the structure comprising at least 10 layers prior to curing the structure.

22 . The method as recited in claim 14 , wherein the ink is extruded as a thin sheet having a thickness in a range of 25 microns to 500 microns.

Assignees

• L Livermore Nat Security Llc

Inventors

• Knipe Jennifer Marie
• Baker Sarah E
• Hernandez Maira Ceron
• Lenhardt Jeremy M
• Pang Simon Hoching
• Stolaroff Joshuah K
• Worthington Matthew A

Classifications

• C08L83/04

  Polysiloxanes · CPC title

• C09D11/106

  containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• C09D11/03

  characterised by features other than the chemical nature of the binder · CPC title

• B29C64/118

  using filamentary material being melted, e.g. fused deposition modelling [FDM] · CPC title

• B01J20/267 Primary

  Cross-linked polymers · CPC title