SMART MATERIALS, DRY TEXTILE SENSORS, AND ELECTRONICS INTEGRATION IN CLOTHING, BED SHEETS, AND PILLOW CASES FOR NEUROLOGICAL, CARDIAC AND/OR PULMONARY MONITORING

• US 20170354372A1
• Filed: 08/03/2017
• Published: 12/14/2017
• Est. Priority Date: 03/08/2011
• Status: Active Grant

• Current Assignee: Nanowear Inc.
• Original Assignee: Nanowear Inc.
• Inventors: Varadan, Vijay K., RAI, Pratyush, KUMAR, Prashanth Shyam, MATHUR, Gyanesh N., AGARWAL, M. P.
• Granted Patent: US 10,932,720 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 2562/0215 Silver or silver chloride containing
• CPC Class Codes: A61B 5/25 Bioelectric electrodes therefor
• CPC Class Codes: A61B 5/282 Holders for multiple electrodes for introduction into the body A61B5/287
• CPC Class Codes: A61B 5/6804 Garments; Clothes

Abstract

Sensors mounted on a textile include at least one of electrically conductive textile electrodes; single or multiple optically coupled infrared and red emitter and photodiode or photo transistor; and thin film or Resistive Temperature Detector (RTD). Textile electrodes, electrical connections, and electrical functionalization use at least one of nanoparticles, nanostructures, and mesostructures. Conductive thread, for electrical connections, may include a fiber core made from conductive materials such as but not limited to metals, alloys, and graphine structures, and a sheath of insulating materials such as but not limited to nylon, polyester, and cotton.

Claims

1. A wearable remote electrophysiological monitoring system, comprising:

a garment having at least one dry contact sensor, the dry contact sensor including at least one nanostructured, textile-integrated electrode attached thereto, the nanostructured, textile-integrated electrode including

a piece of fabric having between 10,000 and 100,000 nanostructures per square centimeter of fabric, the fabric including electrically conductive fibers, said nanostructures having vertically standing nanowires, the vertically standing nanowires projecting from the fibers to varying lengths of between 0.01 and 10 micrometers, the nanowires arranged to make contact with the wearer'"'"'s skin, wherein the vertically standing nanowires are vertically standing when viewed relative to the fabric when the fabric is in a horizontal plane, wherein the conductive fibers include textile fibers blended or coated with metal, the textile fibers being selected from the group consisting of nylon, silk, polyester, modified celluloses, polymers, cotton, lycra, and spandex;

a control module in electrical communication with the at least one nanostructured, textile-integrated electrode; and

a remote computing system in communication with the control module.

2. The wearable remote electrophysiological monitoring system of claim 1, wherein the dry contact sensor is electrically connected to the control module by silver-coated thread.

3. The wearable remote electrophysiological monitoring system of claim 1 wherein the dry contact sensor is electrically coupled to the plurality of nanostructured textile electrodes by printed conductive tracks comprising a flexible nanocomposite trace which includes silver nanoparticles and an elastic acrylic based binder.

4. The wearable remote electrophysiological monitoring system of claim 1, wherein the remote computing system communicates with the control module using radio-frequency communications.

5. The wearable remote electrophysiological monitoring system of claim 1, wherein each of the plurality of nanostructures projects from the fiber less than one micrometer.

6. The wearable remote electrophysiological monitoring system of claim 1, wherein at least one of the plurality of nanostructures comprises a one-dimensional nanostructure.

7. The wearable remote electrophysiological monitoring system of claim 6, wherein the one-dimensional nanostructure comprises a wire or a tube.

8. The wearable remote electrophysiological monitoring system of claim 1, wherein at least one of the plurality of nanostructures comprises a bump.

9. The wearable remote electrophysiological monitoring system of claim 1, wherein at least one of the plurality of nanostructures comprises a three-dimensional nanostructure.

10. The wearable remote electrophysiological monitoring system of claim 9, wherein the three-dimensional nanostructure comprises a helical nanostructure.

11. The wearable remote electrophysiological monitoring system of claim 1, wherein the vertically standing nanowires comprise carbon nanotubes coated with a conductive polymer.

12. The wearable remote electrophysiological monitoring system of claim 1, wherein the conductive polymer is polyaniline.

13. The wearable remote electrophysiological monitoring system of claim 1, wherein the dry contact sensor is electrically connected to the control module by a conductive trace formed from nanocomposite ink, the nanocomposite ink comprises carbon nanotubes coated with a conductive polymer.

14. The wearable remote electrophysiological monitoring system of claim 1, wherein the conductive polymer is polyaniline.

15. The wearable remote electrophysiological monitoring system of claim 13, wherein the nanocomposite ink has a resistance value of less than 1 mΩ

/sq.

16. The wearable remote electrophysiological monitoring system of claim 13, wherein the carbon nanotubes are coated with conductive nanoparticles.

17. The wearable remote electrophysiological monitoring system of claim 16, wherein the conductive nanoparticles are silver nanoparticles and the conductive polymer is polyaniline.

18. The wearable remote electrophysiological monitoring system of claim 13, wherein the conducted polymer coated carbon nanotubes are suspended in an organic binder.

19. The wearable remote electrophysiological monitoring system of claim 11, wherein the carbon nanotubes are coated with conductive nanoparticles.

20. The wearable remote electrophysiological monitoring system of claim 19, wherein the conductive nanoparticles are silver nanoparticles and the conductive polymer is polyaniline.

21. The wearable remote electrophysiological monitoring system of claim 1, wherein the vertically standing nanowires are vertically standing conductive fibers adhered to the fabric via flocking.

22. The wearable remote electrophysiological monitoring system of claim 21, wherein the fabric has been leveled to a roughness below 100 nm by successively coating and curing the fabric with polymers having different viscosities.

23. The wearable remote electrophysiological monitoring system of claim 1, wherein the dry contact sensor is electrically connected to the control module by a conductive thread, the conductive thread comprising a conductive fiber core and an insulation sheath, the conductive fiber core including nanofibers or mesofibers made of a metal or a graphine structure.

24. The wearable remote electrophysiological monitoring system of claim 1, wherein the vertically standing nanowires are comprised of polymer nanofibers coated with a conductive material.

25. The wearable remote electrophysiological monitoring system of claim 24, wherein the polymer nanofibers are made of a material selected from the group consisting of polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, polyester, polyurethane, polystyrene, polyvinyl alcohol, ethylene vinyl alcohol, polyacrylamide or poly lactic acid.

26. The wearable remote electrophysiological monitoring system of claim 24, wherein the polymer nanofibers are made of a polyethylene terephthalate modified with sulfonated isocyanate.

27. The wearable remote electrophysiological monitoring system of claim 24, wherein the conductive material is selected from the group consisting of silver, gold, platinum, polyaniline, polypyrrole, poly(3,4-ethylenedioxythiophene), titanium oxide, iron oxide, and zinc oxide.

28. The wearable remote electrophysiological monitoring system of claim 24, wherein the nanostructures are formed by nano-imprinting by applying a nanocomposite ink to a fabric in a pattern, and forming vertically standing nanowires from the nanocomposite ink molded with an etched drum.

29. A wearable remote electrophysiological monitoring system, comprising:

a garment having at least one dry contact sensor, the dry contact sensor including at least one nanostructured, textile-integrated electrode attached thereto, the nanostructured, textile-integrated electrode including

a piece of fabric having between 10,000 and 100,000 nanostructures per square centimeter of fabric, the fabric including electrically conductive fibers, said nanostructures having vertically standing nanowires, the vertically standing nanowires projecting from the fibers to varying lengths of between 0.01 and 10 micrometers, the nanowires arranged to make contact with the wearer'"'"'s skin, wherein the vertically standing nanowires are vertically standing when viewed relative to the fabric when the fabric is in a horizontal plane, wherein the conductive fibers include textile fibers blended or coated with metal, wherein the vertically standing nanowires are comprised of polymer nanofibers coated with a conductive material;

a control module in electrical communication with the at least one nanostructured, textile-integrated electrode; and

a remote computing system in communication with the control module.

30. The wearable remote electrophysiological monitoring system of claim 29, wherein the dry contact sensor is electrically connected to the control module by a conductive thread, the conductive thread comprising a conductive fiber core and an insulation sheath, the conductive fiber core including nanofibers or mesofibers made of a metal or a graphine structure.

31. The wearable remote electrophysiological monitoring system of claim 29, wherein the polymer nanofibers are made of a material selected from the group consisting of polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, polyester, polyurethane, polystyrene, polyvinyl alcohol, ethylene vinyl alcohol, polyacrylamide or poly lactic acid.

32. The wearable remote electrophysiological monitoring system of claim 29, wherein the conductive material is selected from the group consisting of silver, gold, platinum, polyaniline, polypyrrole, poly(3,4-ethylenedioxythiophene), titanium oxide, iron oxide, and zinc oxide.

33. The wearable remote electrophysiological monitoring system of claim 29, wherein the nanostructures are formed by nano-imprinting by applying a nanocomposite ink to a fabric in a pattern, and forming vertically standing nanowires from the nanocomposite ink molded with an etched drum.