SUPERHYDROPHOBIC, DIATOMACEOUS EARTH COMPRISING BANDAGES AND METHOD OF MAKING THE SAME

• US 20100286582A1
• Filed: 11/19/2008
• Published: 11/11/2010
• Est. Priority Date: 07/13/2007
• Status: Active Grant

• Current Assignee: UT-Battelle LLC
• Original Assignee: UT-Battelle LLC
• Inventors: D'URSO, BRIAN R., SIMPSON, JOHN T.
• Granted Patent: US 9,539,149 B2
• Time in Patent Office: Days
• US Class Current: 602/43
• CPC Class Codes: A61F 13/022 having more than one layer with different fluid retention characteristics
• CPC Class Codes: A61F 13/0289 manufacturing of adhesive dressings
• CPC Class Codes: A61F 2013/00255 with pores
• CPC Class Codes: A61F 2013/00319 to make surface hydrophobic
• CPC Class Codes: A61F 2013/004 from liquid water
• CPC Class Codes: A61F 2013/00863 with pores
• CPC Class Codes: A61F 2013/00885 impervious, i.e. occlusive bandage
• CPC Class Codes: A61F 2013/00889 waterproof
• CPC Class Codes: A61L 15/40 containing ingredients of undetermined constitution or reaction products thereof , e.g. plant or animal extracts
• CPC Class Codes: A61L 15/42 Use of materials characterised by their function or physical properties liquid bandages A61L26/00
• CPC Class Codes: D06M 11/79 with silicon dioxide, silicic acids or their salts
• CPC Class Codes: D06M 15/19 with synthetic macromolecular compounds with synthetic rubber D06M15/693
• CPC Class Codes: D06M 2200/12 Hydrophobic properties
• CPC Class Codes: D06M 23/08 Processes in which the treating agent is applied in powder or granular form adhesives for multi-layer textile fabrics D06M17/00
• CPC Class Codes: D06M 23/10 Processes in which the treating agent is dissolved or dispersed in organic solvents; Processes for the recovery of organic solvents thereof

Abstract

A bandage comprising a substrate having a first surface with a plurality of superhydrophobic particles attached to the first surface. The plurality of superhydrophobic particles can be porous diatomaceous earth particles having a hydrophobic layer conforming to the surfaces of the DE particles, where the hydrophobic layer is bound to the DE particles. The plurality of attached superhydrophobic particles can render the first surface superhydrophobic, while a second surface opposite the first surface can be hydrophilic or hydrophobic. The substrate can be breathable in order to maintain skin health for the tissue underlying the bandage. The substrate can be selected from porous films, apertured films, textiles, nonwoven materials, impregnated composites thereof, and combinations thereof.

Claims

1. A bandage comprising:

a substrate comprising a first surface, and a plurality of superhydrophobic particles attached to said first surface;

wherein the plurality of superhydrophobic particles comprise porous diatomaceous earth (DE) particles having a hydrophobic layer conforming to surfaces of said DE particles, wherein said hydrophobic layer is bound to said DE particles.

2. The bandage of claim 1, wherein said plurality of attached superhydrophobic particles render said first surface of said substrate superhydrophobic.

3. The bandage of claim 1, wherein said substrate is breathable.

4. The bandage of claim 1, wherein said substrate comprises a second surface that is opposite said first surface and is not superhydrophobic.

5. The bandage of claim 1, wherein said substrate comprises a second surface that is opposite said first surface and is hydrophilic.

6. The bandage of claim 1, further comprising a binder adhering said plurality of superhydrophobic particles to said first surface.

7. The bandage of claim 1, wherein said plurality of superhydrophobic particles are mechanically bound to said first surface.

8. The bandage of claim 1, wherein said substrate is a material selected from the group consisting of porous films, apertured films, textiles, nonwoven materials, impregnated composites thereof, and combinations thereof.

9. The bandage of claim 1, further comprising a dressing attached to said substrate.

10. The bandage of claim 9, wherein said dressing is attached to a side of said substrate opposite said first surface.

11. A method of making a bandage having a water repellant surface, comprising:

providing a substrate,

attaching a plurality of particles to a first surface of said substrate, and

forming a plurality of superhydrophobic particles from a plurality of particles, wherein said plurality of superhydrophobic particles comprise, porous diatomaceous earth (DE) particles having a hydrophobic layer conforming to surfaces of said DE particles, wherein said hydrophobic layer is bound to said DE particles, wherein said first surface is hydrophobic after said method is complete.

12. The method of claim 11, wherein said plurality of attached superhydrophobic particles render the first surface superhydrophobic.

13. The method of claim 11, wherein said attaching step comprises:

forming a mixture comprising said plurality of particles and a solvent, and

applying said mixture to said first surface.

14. The method of claim 13, wherein said solvent is volatile at a temperature of the applying step, and said first surface is soluble in said solvent.

15. The method of claim 11, wherein said attaching step comprises:

forming an adhesive mixture comprising said plurality of particles and an adhesive, and

applying said adhesive mixture to said first surface.

16. The method of claim 11, wherein the attaching step comprises:

applying said plurality of particles to said first surface while said first surface is adherent.

17. The method of claim 11, wherein said forming step occurs after said attaching step.

18. The method of claim 11, wherein said forming step occurs before said attaching step.

19. The method of claim 11, wherein said substrate is breathable.

20. The method of claim 11, wherein said substrate comprises a second surface opposite said first surface that is hydrophilic after said method is complete.