Membranes
US-2016256834-A1 · Sep 8, 2016 · US
Gas separation membranes with intermixed layers
US9731248B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9731248-B2 |
| Application number | US-201314409559-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 26, 2013 |
| Priority date | Jun 26, 2012 |
| Publication date | Aug 15, 2017 |
| Grant date | Aug 15, 2017 |
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- Title
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Abstract
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A composite membrane comprising: a) a porous support; b) a gutter layer; and c) a discriminating layer; wherein at least 10% of the discriminating layer is intermixed with the gutter layer.
First claim
Opening claim text (preview).
The invention claimed is: 1. A composite membrane comprising: a) a porous support; b) a gutter layer comprising dialkoxysilane groups; and c) a discriminating layer; wherein at least 10% of the discriminating layer is intermixed with the gutter layer. 2. The composite membrane according to claim 1 wherein the discriminating layer has an average thickness of 10 to 400 nm. 3. The composite membrane according to claim 1 , wherein the discriminating layer comprises a polyimide, cellulose acetate, polyethyleneoxide or polyetherimide. 4. The composite membrane according to claim 1 , wherein the discriminating layer comprises a polyimide comprising trifluoromethyl groups. 5. The composite membrane according to claim 1 , wherein the discriminating layer comprises a polyimide comprising groups of the Formula (1): 6. The composite membrane according to claim 1 , wherein a portion of the gutter layer is present within the support and a portion of the gutter layer is outside of the support and the following conditions are satisfied: (i) the portion of the gutter layer outside of the support has an average thickness (GL e ) of 10 nm to 900 nm; and (ii) the portion of the gutter layer present within the support has an average thickness (GL i ) of 10% to 350% of GL e . 7. A gas separation module comprising a composite membrane according claim 1 . 8. The composite membrane according to claim 1 wherein a portion of the gutter layer is present within the support and a portion of the gutter layer is outside of the support and the following conditions are satisfied: (i) the portion of the gutter layer outside of the support has an average thickness (GL e ) of 200 nm to 900 nm; and (ii) the portion of the gutter layer present within the support has an average thickness (GL i ) of 10% to 200% of GL e . 9. The composite membrane according to claim 1 wherein a portion of the gutter layer is present within the support and a portion of the gutter layer is outside of the support and the following conditions are satisfied: (i) the portion of the gutter layer outside of the support has an average thickness (GL e ) of 400 nm to 900 nm; and (ii) the portion of the gutter layer present within the support has an average thickness (GL i ) of 20% to 90% of GL e . 10. The composite membrane according to claim 8 wherein the discriminating layer comprises a polyimide comprising trifluoromethyl groups. 11. The composite membrane according to claim 9 wherein the discriminating layer comprises a polyimide comprising trifluoromethyl groups. 12. The composite membrane according to claim 1 wherein the gutter layer contains a metal and silicon in a molar ratio of at least 0.0005. 13. The composite membrane according to claim 1 which has a pure water permeability at 20° C. of less than 6×10 −8 m 3 /m 2 ·s·kPa. 14. The composite membrane according to claim 1 which has a dry thickness of 20 to 500 μm. 15. The composite membrane according to claim 11 which has a pure water permeability at 20° C. of less than 6×10 −8 m 3 /m 2 ·s·kPa and a dry thickness of 20 to 500 m. 16. A gas separation module comprising a composite membrane according to claim 9 . 17. A gas separation module comprising a composite membrane according to claim 15 .
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Classifications
In situ manufacturing by polymerisation, polycondensation, cross-linking or chemical reaction · CPC title
by elimination of segments of the precursor, e.g. nucleation-track membranes, lithography or laser methods · CPC title
by exposure to radiation (B05D3/02 takes precedence {; plasma treatment B05D3/141}) · CPC title
Characteristic thickness · CPC title
UV-treatment · CPC title
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Frequently asked questions
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- What does patent US9731248B2 cover?
- A composite membrane comprising: a) a porous support; b) a gutter layer; and c) a discriminating layer; wherein at least 10% of the discriminating layer is intermixed with the gutter layer.
- Who is the assignee on this patent?
- Fujifilm Mfg Europe Bv, Fujifilm Mfg Europe Bv
- What technology area does this patent fall under?
- Primary CPC classification B01D69/12. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Aug 15 2017 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).