BILAYER 2D MATERIAL LAMINATES FOR HIGHLY SELECTIVE AND ULTRA-HIGH THROUGHPUT FILTRATION

• US 20190314769A1
• Filed: 04/12/2019
• Published: 10/17/2019
• Est. Priority Date: 04/13/2018
• Status: Abandoned Application

• Current Assignee: University of Florida Research Foundation, Incorporated (State University System of Florida)
• Original Assignee: University of Florida Research Foundation, Incorporated (State University System of Florida)
• Inventors: Moghaddam, Saeed
• Application Number:
  US16/382,851
• Publication Number:
  US 20190314769A1
• Time in Patent Office: Days
• CPC Class Codes: A61M 1/16 with membranes
• CPC Class Codes: A61M 1/3486 Biological, chemical treatment, e.g. chemical precipitation; treatment by absorbents
• CPC Class Codes: A61M 1/3679 by absorption A61M1/3675 takes precedence
• CPC Class Codes: B01D 2323/30 Cross-linking
• CPC Class Codes: B01D 2325/0283 Pore size
• CPC Class Codes: B01D 2325/08 Patterned membranes
• CPC Class Codes: B01D 2325/18 Membrane materials having mixed charged functional groups
• CPC Class Codes: B01D 2325/20 Specific permeability or cut-off range
• CPC Class Codes: B01D 61/243 Dialysis
• CPC Class Codes: B01D 67/0044 by chemical reaction
• CPC Class Codes: B01D 69/02 characterised by their properties
• CPC Class Codes: B01D 69/107 Organic support material
• CPC Class Codes: B01D 69/125 In situ manufacturing by polymerisation, polycondensation, cross-linking or chemical reaction
• CPC Class Codes: B01D 69/144 containing embedded or bound biomolecules
• CPC Class Codes: B01D 69/148 Organic/inorganic mixed matrix membranes
• CPC Class Codes: B01D 71/021 Carbon
• CPC Class Codes: B01D 71/0211 Graphene or derivates thereof
• CPC Class Codes: B01D 71/60 Polyamines

Abstract

Various examples are provided for highly selective and ultra-high throughput filtration using bilayer two-dimensional (2D) material laminates and highly absorptive medium of 2D material laminates or solution dispersions. In one example, a 2D material bilayer membrane includes a first membrane layer; an interlinking layer of interlinking molecules disposed on the first membrane layer; and a second membrane layer disposed on the interlinking layer. The interlinking molecules electrostatically or covalently interlink the second membrane layer and first membrane layer.

Claims

1. A 2D material bilayer membrane, comprising:

a first membrane layer;

an interlinking layer of interlinking molecules disposed on the first membrane layer; and

a second membrane layer disposed on the interlinking layer, where the interlinking molecules electrostatically or covalently interlink the second membrane layer and first membrane layer.

2. The 2D material bilayer membrane of claim 1, wherein a spacing between the first and second membrane layers is determined by the interlinking molecules.

3. The 2D material bilayer membrane of claim 2, wherein the spacing is based upon the molecular weight of the interlinking molecules.

4. The 2D material bilayer membrane of claim 1, wherein the interlinking molecules consist of poly(allylamine hydrochloride) (PAH).

5. The 2D material bilayer membrane of claim 1, wherein the interlinking molecules comprise poly(dimethyldiallylammonium chloride) (PDDAC).

6. The 2D material bilayer membrane of claim 1, wherein the interlinking molecules electrostatically or covalently interlink with platelets of the second membrane layer.

7. The 2D material bilayer membrane of claim 6, wherein the platelets comprise nanoplatelets.

8. The 2D material bilayer membrane of claim 6, wherein a surface chemistry of the platelets is modified by the addition of a modification molecule.

9. The 2D material bilayer membrane of claim 8, wherein the modification molecule is amine.

10. The 2D material bilayer membrane of claim 8, wherein the modification to the surface chemistry includes a modification to surface charge polarity, surface charge density, hydrophilicity or hydrophobicity.

11. The 2D material bilayer membrane of claim 6, wherein the platelets comprise graphene oxide (GO) platelets.

12. The 2D material bilayer membrane of claim 1, wherein the first membrane layer is a porous polymer layer.

13. The 2D material bilayer membrane of claim 12, wherein the porous polymer layer is a synthesized or patterned layer.

14. The 2D material bilayer membrane of claim 1, wherein the first membrane layer comprises platelets.

15. A 2D material bilayer membrane structure, comprising:

a first channel layer comprising a first fluid channel;

a 2D material bilayer membrane disposed on the first channel layer over the first fluid channel; and

a second channel layer comprising a second fluid channel, the second channel layer disposed on the 2D material bilayer membrane opposite the first channel layer with the second fluid channel aligned with the first channel layer.

16. The 2D material bilayer membrane structure of claim 15, wherein the 2D material bilayer membrane comprises layers of platelets electrostatically or covalently interlinked by interlinking molecules.

17. The 2D material bilayer membrane structure of claim 16, wherein the platelets comprise graphene oxide (GO) platelets.

18. The 2D material bilayer membrane structure of claim 16, wherein a surface chemistry of the platelets is modified by the addition of a modification molecule.

19. The 2D material bilayer membrane structure of claim 16, wherein the layers of platelets are disposed on a porous support membrane.

20. The 2D material bilayer membrane structure of claim 15, wherein the first and second channels are microchannels.