Metal-organic framework/polymer foam composite materials and their uses in decontamination and/or ballistic protection

Patent metadata

Field	Value
Publication number	US-11524266-B1
Application number	US-202016778557-A
Country	US
Kind code	B1
Filing date	Jan 31, 2020
Priority date	Jan 31, 2020
Publication date	Dec 13, 2022
Grant date	Dec 13, 2022

Abstract

A composite material is provided comprising a porous polymeric matrix having metal-organic framework (MOF) domains dispersed within the porous polymeric matrix, each of said MOF domains in fluid communication with the external environment through the pores in the porous polymeric matrix. A process of using the composite material to chemically modify or detoxify a chemical warfare agent or a toxic industrial chemical is also provided. The chemical warfare agent or the toxic industrial chemical is brought into contact with a MOF domain within the porous polymeric matrix so that the MOFs adsorb and chemically modify the chemical warfare agent or the toxic industrial chemical. A process for producing such a composite material is also disclosed.

First claim

The invention claimed is:

1. A composite material, comprising:
a porous open celled foam polymeric matrix; and
a plurality of metal-organic framework (MOF) domains within said porous open celled foam polymeric matrix, each of said plurality of MOF domains in fluid communication with pores in said porous open celled foam polymeric matrix so that gases and vapors external to the composite can access the MOF domains, and wherein said MOF is selected from the group consisting of NU-1000, UiO-66-NH 2 , UiO-67-NH 2 , UiO-67(NH 2 ) 2 , MOF-808, or a combination thereof.

2. The composite material of claim 1 , wherein said plurality of MOF domains comprise from 5 to 90 total weight percent of the composite material.

3. The composite material of claim 1 , wherein said MOF is UiO-66-NH 2 .

4. The composite material of claim 3 , wherein said porous open celled foam polymeric matrix comprises poly(styrene-ethylene-butylene-styrene).

5. The composite material of claim 1 , wherein said porous open celled foam polymeric matrix comprises at least one of polyimide, polystyrene, polyurethane, polyvinyl chloride (PVC), a poly(sulfonated tetrafluoroethylene), poly(styrene-butadiene-styrene) (SBS), poly(styrene-isoprene-styrene) (SIS), poly(acrylonitrile-butadiene-styrene) (ABS), poly(styrene-ethylene-butadiene-styrene) (SEBS), poly(styrene-ethylene-propylene-styrene) (SEPS), polydimethylsiloxane, polychloroprene, polyurethane, nitrile, latex, low-density polyethylene (LDPE), first grade polyethylene (PE), polypropylene (PP), albumin, polyvinyl alcohol (PVA), polyethyleneimine (PEI), polyvinylpyrrolidone (PVP), ethylene-vinyl acetate (EVA), polyethylene-vinyl acetate (PEVA), or a combination thereof.

6. The composite material of claim 1 , wherein said porous open celled foam polymeric matrix has a morphology defined by selective separation of a diluent to produce the porous or open celled polymer matrix.

7. The composite material of claim 1 , wherein said composite has a pore volume of 0.16-0.21 cm 3 /g.

8. The composite material of claim 1 , further comprising a substrate, said substrate having the form of a filter, a mask, a helmet, protective clothing or suit, or a vehicle.

9. A process of chemically modifying/detoxifying a chemical warfare agent or a toxic industrial chemical, comprising:
bringing the chemical warfare agent or the toxic industrial chemical into contact with a composite material comprising:
a porous open celled foam Polymeric matrix; and
a plurality of metal-organic framework (MOF) domains within said porous open celled foam polymeric matrix, each of said plurality of MOF domains in fluid communication with pores in said porous open celled foam polymeric matrix so that gases and vapors external to the composite can access the MOF domains, and wherein said MOF is selected from the group consisting of NU-1000, UiO-66-NH 2 , UiO-67-NH 2 , UiO-67(NH 2 ) 2 , MOF-808, or a combination thereof; and

wherein said MOF adsorbs the chemical warfare agent or the toxic industrial chemical and chemically modifies the chemical warfare agent or the toxic industrial chemical.

10. The process of claim 9 , wherein bringing the chemical warfare agent or the toxic industrial chemical into contact with the composite material is done by flowing air containing the chemical warfare agent or toxic industrial chemical through the composite material.

11. The process of claim 9 , wherein the chemical modification is by hydrolysis reaction.

12. The process of claim 9 , wherein the chemical modification is by oxidation reaction.

13. The process of claim 9 , wherein the chemical modification is by elimination reaction.

14. The process of claim 9 , wherein the chemical warfare agent or the toxic industrial chemical is an organophosphorus compound.

15. The process of claim 9 , wherein the chemical warfare agent is selected from the group consisting of Soman, VX, and a mustard agent.

16. The process of claim 9 , wherein the chemical warfare agent or the toxic industrial chemical is chlorine.

17. The process of claim 9 , wherein the toxic industrial chemical is nitrogen dioxide.

Assignees

• Combat Capabilities Dev Command Chemical Biological Center
• Us Army

Inventors

• Peterson Gregory W
• Lenhart Joseph L
• Mrozek Randy A

Classifications

• C01B39/00

  Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination (treatment to modify the sorption properties, e.g. shaping using a binder, B01J20/10; treatment to modify the catalytic properties, e.g. combination of treatments to make the zeolites appropriate to their use as a catalyst, B01J29/04; treatment to improve the ion-exchange properties B01J39/14) · CPC title

• A62D3/35

  by hydrolysis · CPC title

• B01D69/147 Primary

  containing embedded adsorbents · CPC title

• B01D71/24

  Rubbers · CPC title

• C01B3/0015

  Organic compounds, e.g. liquid organic hydrogen carriers [LOHC] or metalorganic compounds; Solutions thereof · CPC title