Single threaded composite fibers and yarns for the degradation of and protection against toxic chemicals and biological agents

Patent metadata

Field	Value
Publication number	US-11097261-B1
Application number	US-201916382373-A
Country	US
Kind code	B1
Filing date	Apr 12, 2019
Priority date	Apr 17, 2018
Publication date	Aug 24, 2021
Grant date	Aug 24, 2021

Abstract

The present invention relates to single thread composite fibers comprising at least one binder and at least one active catalyst for the capture and degradation of chemical threats such as chemical warfare agents (CWA), biological warfare agents, and toxic industrial chemicals (TIC) and a method for producing the same. The invention fibers are applicable to the fields of protective garments, filtration materials, and decontamination materials.

First claim

The invention claimed is:

1. A composite fiber, comprising: a single thread comprising at least one polymeric binder and at least one catalytic active material, wherein said polymeric binder is agarose and said catalytic active material is reactive with at least one toxic chemical or agent and is selected from the group consisting of Zr(OH) 4 and a metal organic frameworks, and wherein said fiber further includes at least one reactive additive selected from the group consisting of perchlorates, persulfates, organic peroxides, inorganic peroxides, alkali metal peroxide, alkali metal oxides, and mixtures thereof and wherein said fiber comprises a single thread produced by a wet spinning process.

2. The fiber of claim 1 , wherein said catalytic active material comprises 30 to 90 wt. % of said fiber.

3. The fiber of claim 1 , wherein said Zr(OH) 4 comprises 50 to 90 wt. % of said fiber.

4. The fiber of claim 3 , wherein said Zr(OH) 4 comprises 90 wt. % of said fiber.

5. The fiber of claim 1 , wherein said metal organic framework is selected from the group consisting of UiO-66, UiO-66-amine, NU-100, PCN-250 and HKUST.

6. The fiber of claim 1 , wherein said polymeric binder is agarose and said catalytic active material is a metal organic framework.

7. The fiber of claim 1 , wherein said fiber further includes chemicals immobilized on or within said fiber that can perform oxidation or hydrolysis.

8. The fiber of claim 1 , wherein said fiber has a diameter of about 100 μm to 1 cm.

9. The fiber of claim 8 , wherein said fiber has a diameter of about 200 μm to 800 μm.

10. The fiber of claim 1 , wherein said fiber has pore sizes in the range of about 1 nm to less than 400 nm.

11. The fiber of claim 1 , wherein said fiber has a surface area in the range of about 25 m 2 /g to 2,500 m 2 /g.

12. The fiber of claim 1 , wherein a plurality of said fibers are used to make yarns, textiles, protective garments, filtration materials, and decontamination wipes.

13. The fiber of claim 1 , wherein said toxic chemical or agent is selected from the group consisting of: chemical warfare agents, chemical warfare agent simulants, and toxic industrial chemicals.

14. The fiber of claim 13 , wherein said chemical warfare agents are selected from G, V, and H-class agents, and said toxic industrial chemicals are selected from ammonia, hydrogen chloride, sulfur dioxide, hydrogen sulfide, and cyanogen chloride.

15. A composite fiber, comprising: a single thread comprising at least one polymeric binder and at least one catalytic active material, wherein said polymeric binder is a block copolymer selected from the group consisting of sulfonated tetrafluoroethylene fluoropolymer copolymer, styrene-butadiene-styrene (SBS), styrene-isoprene-styrene (SIS), styrene-ethylene-butadiene-styrene (SEBS) and styrene-ethylene-propylene-styrene (SEPS); and said catalytic active material is reactive with at least one toxic chemical or agent and is selected from the group consisting of Zr(OH) 4 and a metal organic frameworks, and wherein said fiber further includes at least one reactive additive selected from the group consisting of perchlorates, persulfates, organic peroxides, inorganic peroxides, alkali metal peroxide, alkali metal oxides, and mixtures thereof, and wherein said fiber comprises a single thread produced by a wet spinning process.

16. The fiber of claim 15 , wherein said metal organic framework is selected from the group consisting of UiO-66, UiO-66-amine, NU-100, PCN-250 and HKUST.

Assignees

• Combat Capabilities Dev Command Chemical Biological Center
• Us Army

Inventors

• Landers John M
• Karwacki Christopher J
• Tovar Trenton M
• Peterson Gregory W

Classifications

• B01J2235/30

  Scanning electron microscopy; Transmission electron microscopy · CPC title

• B01J35/40

  characterised by dimensions, e.g. grain size (in a colloidal state B01J35/23; crystallite size B01J35/77) · CPC title

• D01F6/28

  from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• D01F1/10

  Other agents for modifying properties · CPC title

• B01J2540/40

  Non-coordinating groups comprising nitrogen · CPC title