Single-pass filtration systems and processes
US-2015360180-A1 · Dec 17, 2015 · US
Membrane for filtrating water
US9873092B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9873092-B2 |
| Application number | US-201314401799-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 20, 2013 |
| Priority date | May 18, 2012 |
| Publication date | Jan 23, 2018 |
| Grant date | Jan 23, 2018 |
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Abstract
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The present invention relates to a material. In particular, it relates to a membrane for filtering water. More particularly, it relates to a membrane comprising carbon nanotubes and mixed cellulose ester porous membranes for water desalination and purification. Still more particular, the membrane comprising a fibrous substrate and carbon nanotubes formed on a fibrous substrate, wherein the surface of the carbon nanotubes is functionally modified. A microfluidic device comprising such a membrane and a method for filtering water are also disclosed.
First claim
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The invention claimed is: 1. A membrane comprising a fibrous substrate and carbon nanotubes formed on a fibrous substrate, the carbon nanotubes having a surface modified by an ion beam plasma generated with argon, wherein the modified surface includes a surface roughness, and displays a Raman spectra D speak intensity to G peak intensity ration (I D /I G ) greater than 0.8. 2. The membrane according to claim 1 , wherein the fibrous substrate is a mixed cellulose ester porous membrane. 3. The membrane according to claim 1 , wherein the carbon nanotubes are multi-walled carbon nanotubes. 4. The membrane according to claim 1 , wherein the height of the carbon nanotubes are between 100 to 200 μm. 5. The membrane according to claim 1 , wherein the diameter of the carbon nanotubes are between 10 to 20 nm. 6. The membrane according to claim 1 , wherein the carbon nanotubes have a wall number of between 5 to 10. 7. The membrane according to claim 1 , wherein the volume density of the carbon nanotubes on the fibrous substrate is 0.8 g/cm 3 . 8. The membrane according to claim 1 , wherein the porosity of the membrane is 60%. 9. A microfluidic device comprising a membrane according to claim 1 . 10. A water filtration method, comprising passing water through the membrane according to claim 1 to filter the water. 11. The water filtration method of claim 10 , wherein the filtration method comprises a reverse osmosis desalination method, a nanofiltration method, or an ultrafiltration method. 12. The membrane according to claim 1 , wherein the I D /I G peak intensity ration is about 1.26.
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- What does patent US9873092B2 cover?
- The present invention relates to a material. In particular, it relates to a membrane for filtering water. More particularly, it relates to a membrane comprising carbon nanotubes and mixed cellulose ester porous membranes for water desalination and purification. Still more particular, the membrane comprising a fibrous substrate and carbon nanotubes formed on a fibrous substrate, wherein the surf…
- Who is the assignee on this patent?
- Univ Singapore Technology & Design, Massachusetts Inst Technology, Singapore Univ Of Technology
- What technology area does this patent fall under?
- Primary CPC classification B01D61/18. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jan 23 2018 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).