Method and apparatus for ophthalmic devices comprising dielectrics and nano-scaled droplets of liquid crystal
US-2015077660-A1 · Mar 19, 2015 · US
Membranes with tunable selectivity
US10376845B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10376845-B2 |
| Application number | US-201615099289-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 14, 2016 |
| Priority date | Apr 14, 2016 |
| Publication date | Aug 13, 2019 |
| Grant date | Aug 13, 2019 |
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- Title
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Abstract
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Some embodiments comprise membranes comprising a first layer comprising a porous graphene-based material; a second layer comprising a porous graphene-based material; a channel positioned between the first layer and the second layer, wherein the channel has a tunable channel diameter; and at least one spacer substance positioned in the channel, wherein the spacer substance is responsive to the environmental stimulus. In some cases, the membranes have more than two layers of porous graphene-based material. Permeability of a membrane can be altered by exposing the membrane to an environmental stimulus. Membranes can be used in methods of water filtration, immune-isolation, timed drug release (e.g., sustained or delayed release), hemodialysis, or hemofiltration.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of altering membrane permeability comprising: exposing a membrane to an environmental stimulus to thereby alter membrane permeability, wherein the membrane comprises a first layer with a porous graphene-based material, a second layer with a porous graphene-based material, and a channel between the first layer and the second layer, and wherein the channel has a diameter that is altered upon exposing the membrane to the environmental stimulus. 2. The method of claim 1 , wherein the environmental stimulus is selected from the group consisting of variations in temperature, pressure, pH, ionic concentration, solute concentration, tonicity, light, voltage, electric fields, magnetic fields, pi-bonding availability, and combinations thereof. 3. The method of claim 1 , wherein the membrane permeability is altered by a change in the maximum diameter of the channel between the first layer and the second layer. 4. The method of claim 1 , wherein the membrane comprises at least one spacer substance positioned between the first layer and the second layer, wherein the at least one spacer substance is responsive to the environmental stimulus. 5. The method of claim 1 , wherein the at least one spacer substance expands and/or contracts in response to the environmental stimulus.
Assignees
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Classifications
comprising polycarbonates · CPC title
Membrane bioreactor systems · CPC title
characterised by their properties · CPC title
Net structure, e.g. spaced apart filaments bonded at the crossing points · CPC title
comprising synthetic resins not wholly covered by any one of the sub-groups {B32B27/30 - B32B27/42} · CPC title
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- What does patent US10376845B2 cover?
- Some embodiments comprise membranes comprising a first layer comprising a porous graphene-based material; a second layer comprising a porous graphene-based material; a channel positioned between the first layer and the second layer, wherein the channel has a tunable channel diameter; and at least one spacer substance positioned in the channel, wherein the spacer substance is responsive to the e…
- Who is the assignee on this patent?
- Lockheed Corp
- 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 13 2019 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 12 related publications on this page (citations in our corpus or others sharing the same primary CPC).