Halo-containing anion exchange membranes and methods thereof
US-10294325-B2 · May 21, 2019 · US
Poly(phenylene) with high ion selectivity for use in anion exchange membranes
US11549011B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11549011-B2 |
| Application number | US-202217569777-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 6, 2022 |
| Priority date | Sep 23, 2019 |
| Publication date | Jan 10, 2023 |
| Grant date | Jan 10, 2023 |
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Abstract
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A method for synthesizing a poly(phenylene) with high ion selectivity comprises dissolving an alkyl halide poly(phenylene) in a polar aprotic solvent to form a nonaqueous solution and adding an anhydrous nucleophile to the nonaqueous solution to replace the halide of the alkyl halide poly(phenylene) with a cationic group of the nucleophile. The poly(phenylene) can be used in anion exchange membranes.
First claim
Opening claim text (preview).
I claim: 1. A method for synthesizing a poly(phenylene) with high ion selectivity, comprising: providing an alkyl halide poly(phenylene), wherein at least one pendant aryl ring is functionalized with a hydrophobic alkyl group comprising a methyl, propyl, or a longer chain hydrocarbon, dissolving the alkyl halide poly(phenylene) in a polar aprotic solvent to form a nonaqueous solution, and adding an anhydrous nucleophile to the nonaqueous solution to replace the halide of the alkyl halide poly(phenylene) with a cationic group of the nucleophile. 2. The method of claim 1 , further comprising heating the nonaqueous solution to a temperature of less than 200° C. 3. The method of claim 1 , wherein the polar aprotic solvent comprises n-methyl pyrrolidone, dimethyl acetamide, dimethyl sulfoxide or dimethyl formamide. 4. The method of claim 1 , wherein the nucleophile comprises an amine. 5. The method of claim 4 , wherein the amine comprises trimethyl amine, triethyl amine, or tripropyl amine. 6. The method of claim 1 , wherein the nucleophile comprises imidazole, piperidine, or phosphine. 7. The method of claim 1 , wherein the longer chain hydrocarbon comprises an octyl. 8. The method of claim 1 , wherein the cationic group comprises ammonium, imidazolium, piperidinium, or phosphonium.
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Classifications
Side-chains having aromatic units · CPC title
- C08G61/10Primary
only aromatic carbon atoms, e.g. polyphenylenes · CPC title
Copolymers · CPC title
crosslinking · CPC title
Side-chains containing halogens · CPC title
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- What does patent US11549011B2 cover?
- A method for synthesizing a poly(phenylene) with high ion selectivity comprises dissolving an alkyl halide poly(phenylene) in a polar aprotic solvent to form a nonaqueous solution and adding an anhydrous nucleophile to the nonaqueous solution to replace the halide of the alkyl halide poly(phenylene) with a cationic group of the nucleophile. The poly(phenylene) can be used in anion exchange memb…
- Who is the assignee on this patent?
- Nat Tech & Eng Solutions Sandia Llc
- What technology area does this patent fall under?
- Primary CPC classification C08G61/10. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 10 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).