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US 12,520,890 B2Granted
Antipathogenic fibrous material
AssigneeSINTX Technologies, Inc.
InventorsBryan J. McEntire, Ryan M. Bock, Bhajanjit Singh Bal
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Abstract
Described herein is an antiviral face mask and methods of use thereof to inactivate a virus in contact with the face mask. The face mask may include a fibrous material with silicon nitride powder impregnated therein and a layer surrounding the fibrous material. In some embodiments, silicon nitride is present in the fibrous material at a concentration of about 1 wt. % to about 15 wt. %.
Claims17
A method of embedding silicon nitride powder in a fibrous material, the method comprising:
- pre-treating the fibrous material in at least one pre-treatment tank;
- and
- embedding silicon nitride particles in the fibrous material,
- wherein the at least one pre-treatment tank comprises an array of ultrasonic transducers,
- wherein a first pre-treatment tank contains hot deionized water having a temperature of about 90° C. to about 100° C. at a first pre-treatment step,
- wherein a second pre-treatment tank contains a water-bath with a coupling agent at a second pre-treatment step,
- wherein the fibrous material is selected from the group consisting of polypropylene, polyester, rayon, nylon, and acrylic fiber,
- wherein the coupling agent is an organic surfactant selected from the group consisting of bromides, hydroxides, fluorides, and chlorides, and
- wherein the coupling agent is in the water at a weight ratio of about 1:200 to about 1:1000.
6 more elements
Dependencies are inferred from the claim text.