Surface topographies for non-toxic bioadhesion control

Patent metadata

Field	Value
Publication number	US-9016221-B2
Application number	US-55087009-A
Country	US
Kind code	B2
Filing date	Aug 31, 2009
Priority date	Feb 17, 2004
Publication date	Apr 28, 2015
Grant date	Apr 28, 2015

Abstract

Disclosed herein is an article that includes a first plurality of spaced features. The spaced features are arranged in a plurality of groupings; the groupings of features include repeat units; the spaced features within a grouping are spaced apart at an average distance of about 1 nanometer to about 500 micrometers; each feature having a surface that is substantially parallel to a surface on a neighboring feature; each feature being separated from its neighboring feature; the groupings of features being arranged with respect to one another so as to define a tortuous pathway. The plurality of spaced features provide the article with an engineered roughness index of about 5 to about 20.

First claim

The invention claimed is:

1. An article having a surface topography for resisting bioadhesions of organisms comprising:
a base surface;
a plurality of spaced features; wherein each feature has a surface that is substantially parallel to a surface of a neighboring feature, and wherein each feature has a substantially different geometry than neighboring features; the plurality of spaced features arranged in a plurality of groupings, wherein each grouping has at least three features having a substantially different geometry from each other; the spaced features within each of the groupings being spaced apart at an average distance of about 0.5 micrometers to about 200 micrometers; the adjacent groupings of features being spaced from each other to define an intermediate sinusoidal pathway, wherein neighboring sinusoidal paths converge toward and diverge from each other in a substantially mirror symmetry, further wherein a width of each sinusoidal path as measured between two adjacent groupings is substantially uniform.

2. The article of claim 1 , wherein the plurality of spaced feature extend outwardly from a surface.

3. The article of claim 2 , wherein the plurality of spaced features has a similar chemical composition to the surface.

4. The article of claim 2 , wherein the plurality of spaced features has a different chemical composition from that of the surface.

5. The article of claim 2 , wherein the plurality of spaced features is applied to the surface in the form of a coating.

6. The article of claim 1 , wherein the plurality of spaced features comprises an organic polymer, a ceramic or a metal.

7. The article of claim 6 , wherein the organic polymer is selected from the group consisting of a polyacetal, a polyolefin, a polyacrylic, a polycarbonate, a polystyrene, a polyester, a polyamide, a polyamideimide, a polyarylate, a polyarylsulfone, a polyethersulfone, a polyphenylene sulfide, a polyvinyl chloride, a polysulfone, a polyimide, a polyetherimide, a polytetrafluoroethylene, a polyetherketone, a polyether etherketone, a polyether ketone ketone, a polybenzoxazole, a polyphthalide, a polyacetal, a polyanhydride, a polyvinyl ether, a polyvinyl thioether, a polyvinyl alcohol, a polyvinyl ketone, a polyvinyl halide, a polyvinyl nitrile, a polyvinyl ester, a polysulfonate, a polysulfide, a polythioester, a polysulfone, a polysulfonamide, a polyurea, a polyphosphazene, a polysilazane, a polyurethane, an ethylene propylene diene rubber, a polytetrafluoroethylene, a perfluoroelastomer, a fluorinated ethylene propylene, a perfluoroalkoxyethylene, a polychlorotrifluoroethylene, a polyvinylidene fluoride, a polysiloxane, or a combination comprising at least one of the foregoing organic polymers.

8. The article of claim 1 , wherein the groupings of features are arranged with respect to one another so as to define a linear pathway or a plurality of channels.

9. The article of claim 1 , wherein one or more features are shared between groupings.

10. The article of claim 1 , wherein the groupings have patterns of features.

11. The article of claim 1 , wherein the features have similar geometries.

12. The article of claim 1 , wherein the features have different geometries.

13. The article of claim 1 , wherein the features have different dimensions.

14. The article of claim 1 , wherein the features are periodic.

15. The article of claim 1 , wherein the features are aperiodic.

16. The article of claim 1 , wherein the features have a depth to width ratio of about 1 to about 10.

17. The article of claim 1 , wherein the features have an average surface roughness of about 5 to about 30.

18. The article of claim 1 , wherein the spaced features comprise an inorganic material, and wherein the inorganic material is selected from the group consisting of an inorganic oxide, an inorganic carbides, an inorganic nitride, an inorganic hydroxide, an inorganic oxide having a hydroxide coating, an inorganic carbonitride, an inorganic oxynitride, an inorganic boride, an inorganic borocarbide, or a combination comprising at least one of the foregoing inorganic materials or wherein the inorganic material is a metal oxide, a metal carbide, a metal nitride, a metal hydroxide, a metal oxide having a hydroxide coating, a metal carbonitride, a metal oxynitride, a metal boride, a metal borocarbide, or a combination comprising at least one of the foregoing inorganic materials.

19. The article of claim 1 , wherein the spaced features comprise a metal, the metal being selected from the group consisting of iron, copper, aluminum, tin, gold, titanium, silver, tungsten, platinum, palladium, chromium, or a combination comprising at least one of the foregoing metals.

20. The article of claim 1 , wherein the article has an engineered roughness index of equal to about 5.

21. The article of claim 1 , where the article has an engineered roughness index of equal to about 10.

22. The article of claim 1 , where the article has a drug coating disposed thereon.

23. The article of claim 22 , where the drug coating is a time release coating.

24. The article of claim 22 , where the article is a biomedical implant, a breast implant shell, a fluid filled implant shell; a biomedical instrument; a biomedical device; a heart valve; a hospital surface; clothing/protective personal wear; biomedical packaging; an outside surface of sterilized packaging; a clean room surface; a surface of a semiconductor; food packaging; a food preparation surface; an exterior surface of a marine vessel; an interior surface of a marine vessel; an exterior surface of a ship; a bilge tank; an inlet or an outlet to a water pipe; an inner surface of a pipe or hose; a surface in a water treatment plant; a part of a pumping station; a surface of a power plant; a surface of a child's crib, a surface on handles of exercise equipment; a surface on an ambulance, a surface on a bus, a surface on a public transit vehicle; or a part of a swimming pool.

25. The article of claim 1 , where the article comprises a bio-degradable polymer.

26. The article of claim 1 , where the article is affixed to a surface by an adhesive, by electrostatic forces, by mechanical interlocking devices, or a combination comprising at least one of an adhesive, electrostatic forces or mechanical interlocking devices.

27. The article of claim 1 , where the article is used as an outer and/or an inner surface of a device; an outer and/or an inner surface of an instrument; an outer and/or an inner surface of furniture; a surface on and/or in a hospital; a surface on and/or in a healthcare center; a surface on and/or in a dental office; a surface on and/or in a dispensary; a surface on and/or in a gymnasium; a surface on and/or in a rehabilitation facility; a surface on and/or in a bathroom; a surface on and/or in a waiting room; on a surface of an electrostatic film applied to operating room surfaces between surgeries; on a surface of surgical drapes used to cover patients and/or shield a doctor from fluids; on a surface of waiting room chairs and waiting room furniture; on a surfaces of operating room instruments; on a surface of operating room instrument trays; on a high tough surface in hospital rooms; on bedside table surfaces; on a bedrail switch panel surfaces; on a surface of control panels; on cover surfaces; on a bed sheet surface; on bathroom, locker room and/or waiting room surfaces; on outer and/or inner surfac

Assignees

• Brennan Anthony B
• Long Christopher James
• Bagan Joseph W
• Schumacher James Frederick
• Spiecker Mark M
• Univ Florida

Inventors

• Brennan Anthony B
• Long Christopher James
• Bagan Joseph W
• Schumacher James Frederick
• Spiecker Mark M

Classifications

• B64D15/00

  De-icing or preventing icing on exterior surfaces of aircraft · CPC title

• B63B1/36

  using mechanical means · CPC title

• B08B17/065

  the surface having a microscopic surface pattern to achieve the same effect as a lotus flower · CPC title

• A41D31/305

  using layered materials · CPC title

• B08B17/06 Primary

  by giving articles subject to fouling a special shape or arrangement · CPC title