Crosslinked polyphosphazene blends for gas separation membranes

Patent metadata

Field	Value
Publication number	US-2023383063-A1
Application number	US-202318227072-A
Country	US
Kind code	A1
Filing date	Jul 27, 2023
Priority date	Aug 19, 2019
Publication date	Nov 30, 2023
Grant date	—

Abstract

The disclosed invention relates to a composition comprising a crosslinked blend of polyphosphazene polymers. The composition comprises a first polyphosphazene and a second polyphosphazene, where the first polyphosphazene and the second polyphosphazene being bound by a thiol bearing crosslinking agent. Such compositions are useful as a membrane material for the separation of gasses in a gaseous mixture.

First claim

We claim:

1 . A composition comprising at least a first polyphosphazene and a second polyphosphazene,
wherein the first polyphosphazene has the formula

where R comprises 50% to 95% ethyloxylate and 5% to 50% aryloxy, and
where at least a portion of R comprises a crosslinked functional group;
wherein the second polyphosphazene has the formula

where R′ are aryloxy groups, and where at least a portion of R′ comprises a crosslinked functional group; and
wherein the first polyphosphazene and the second polyphosphazene are bound by a crosslinking agent where the crosslinking agent comprised two or more thiol groups prior to undergoing crosslinking.

2 . The composition of claim 1 , where a portion of R is a methoxyphenoxy.

3 . The composition of claim 1 , where a portion of R is 4-methoxyphenoxy.

4 . The composition of claim 1 , where the crosslinked functional group of the first polyphosphazene was an allylphenol.

5 . The composition of claim 1 , where the crosslinked functional group of the first polyphosphazene was 2-allylphenoxy.

6 . The composition of claim 1 , where a portion of R is 2-(2-methoxyethoxy) ethanol.

7 . The composition of claim 1 where a portion of R′ is a phenoxy group.

8 . The composition of claim 1 where a portion of R′ is phenoxy.

9 . The composition of claim 1 where the crosslinked functional group of the second polyphosphazene was an allylphenol.

10 . The composition according to claim 1 where the first polyphosphazene is present in a wt % ranging from about 75 wt % to about 99 wt % and the second polyphosphazene is present in a wt % ranging from about 1 wt % to about 25 wt %.

11 . The composition according to claim 1 , where the crosslinking agent is selected from the group consisting of pentaerythritol tetrakis(3-mercaptopropionate), poly(3-mercaptopropyl methyl)siloxane, or a combination thereof.

12 . The composition according to claim 1 further comprising a photo-initiating agent.

13 . The composition according to claim 12 where the photo-initiating agent is a small organic peroxide.

14 . The composition according to claim 13 where the photo-initiating agent is 2,2-dimethoxy-2-phenylacetophenone.

15 . The composition of claim 1 where a portion of R is 2-(2-methoxyethoxy) ethanol, where a portion of R′ is phenoxy, where the crosslinking agent is selected from the group consisting of pentaerythritol tetrakis(3-mercaptopropionate), poly(3-mercaptopropyl methyl)siloxane, or a combination thereof, and where the first polyphosphazene is present in a wt % ranging from about 75 wt % to about 99 wt % and the second polyphosphazene is present in a wt % ranging from about 1 wt % to about 25 wt %.

16 . The composition of claim 1 where a portion of R is a 4-methoxyphenoxy and a second portion of R is 2-(2-methoxyethoxy) ethanol, where a portion of R′ is phenoxy, where the crosslinking agent is selected from the group consisting of pentaerythritol tetrakis(3-mercaptopropionate), poly(3-mercaptopropyl methyl)siloxane, or a combination thereof and where the first polyphosphazene is present in a wt % ranging from about 75 wt % to about 99 wt % and the second polyphosphazene is present in a wt % ranging from about 1 wt % to about 25 wt %.

Assignees

• Us Energy

Inventors

• Hopkinson David
• Kusuma Victor Armanda
• Venna Surendar R
• Mcnally Joshua S
• Orme Christopher J
• Stewart Frederick F

Classifications

• C08G79/025 Primary

  Polyphosphazenes · CPC title

• C08L85/02

  containing phosphorus · CPC title

• C08K5/548

  containing sulfur {(C08K5/5477 takes precedence)} · CPC title

• B01D53/1475

  Removing carbon dioxide · CPC title

• C08K5/37 Primary

  Thiols · CPC title