Polymeric film surface

Patent metadata

Field	Value
Publication number	US-9955687-B2
Application number	US-201314402054-A
Country	US
Kind code	B2
Filing date	May 20, 2013
Priority date	May 18, 2012
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

A surface on a polymeric film having an array of patterned structures, wherein the array of patterned structures influences fluid flow of the surface and causes reduced attachment of a biological material.

First claim

The invention claimed is:

1. A polymeric film, comprising:
a surface,
wherein the surface of the polymeric film comprises an array of patterned structures,
wherein topographies of the array of patterned structures are selected and arranged so that when the surface of the polymeric film is rinsed and/or dipped in a fluid, the array of patterned structures induces a turbulent fluid flow and removes biological material thereon, and
wherein when a predetermined space or a predetermined width of the topographies of the polymeric film is larger than a diameter or dimension of the biological material, the rinsed and/or dipped surface of the polymeric film is characterized such that it exhibits a reduced attachment of the biological material.

2. The polymeric film according to claim 1 , wherein said array of patterned structures comprises of pillars or grooves.

3. The polymeric film according to claim 2 , wherein said pillars are micron-sized or nano-sized.

4. The polymeric film according to claim 2 , wherein said pillars have diameters that are individually selected from the range of 10 μm to 50 μm.

5. The polymeric film according to claim 4 , wherein said pillars have diameters that are individually selected from the group consisting of 25 nm, 100 nm, 500 um, 2 μm and 10 μm.

6. The polymeric film according to claim 2 , wherein the spacing between a pair of pillars is the same as the spacing between another pair of pillars.

7. The polymeric film according to claim 2 , wherein the spacing between a pair of pillars is different from the spacing between another pair of pillars.

8. The polymeric film according to claim 2 , wherein said spacing is larger than the size of said biological material.

9. The polymeric film according to claim 1 , wherein said spacing is selected from the range of 10 nm to 100 μm or from 10 μm to 100 μm.

10. The polymeric film according to claim 2 , wherein said spacing is in the nano-scale.

11. The polymeric film according to claim 2 , wherein said pillars have a diameter of 10 μm and a spacing in the range of 6 μm to 50 μm.

12. The polymeric film according to claim 2 , wherein said pillars have diameters individually selected from the range of 25 nm to 10 μm and spacings that are equal to the diameters of said pillars.

13. The polymeric film according to claim 2 , wherein said grooves have an anisotropic cross-sectional shape.

14. The polymeric film according to claim 2 , wherein grooves have a width in the range of 100 nm to 5 m.

15. The polymeric film according to claim 2 , wherein said grooves have a V-shaped cross section.

16. The polymeric film according to claim 15 , wherein said V-shaped groves have a width selected from 100 nm, 500 nm or 2 μm, wherein said width is measured from the top of said groove.

17. The polymeric film according to claim 2 , wherein said grooves have a U-shaped cross section.

18. The polymeric film according to claim 17 , wherein said U-shaped groves have a width selected from 500 nm or 2 μm, wherein said width is measured from the top of said groove.

19. The polymeric film according to claim 1 , wherein said biological material is selected from the group consisting of proteins, eukaryotic organisms, bacteria, viruses and fungi.

20. The polymeric film according to claim 19 , wherein said bacteria is selected from the group consisting of gram negative bacteria, gram positive bacteria and marine bacteria.

21. The polymeric film according to claim 20 , wherein said bacteria is selected from the group consisting of E. coli ATCC 25922, S. epidermidis ATCC 12228 and P. Tunicata D2.

Assignees

• Agency Science Tech & Res
• Ngee Ann Polytechnic
• Temasek Polytechnic
• Singapore Polytechnic

Inventors

• Chong Karen Siew Ling
• Lee Yeong Yuh
• Goh Seok Hong
• Khaw Kevin Beng Chin
• Chaw Ryan
• Low Hong Yee
• Yeo Adrian
• Choy Weng Keong
• Loh Han Liat

Classifications

• C09D5/1681

  Antifouling coatings characterised by surface structure, e.g. for roughness effect giving superhydrophobic coatings or Lotus effect · CPC title

• B63B59/045 Primary

  by wrapping the submerged hull or part of the hull with an impermeable sheet (stopping temporarily leaks in hulls with impermeable sheets B63B43/16) · CPC title

• Y10T428/24802

  Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] · CPC title

• A01N25/34 Primary

  Shaped forms, e.g. sheets, not provided for in any other sub-group of this main group · CPC title