Hydrophobic fluorinated polyelectrolyte complex films and associated methods

• US 7,713,629 B2
• Filed: 03/28/2005
• Issued: 05/11/2010
• Est. Priority Date: 03/26/2004
• Status: Active Grant

• Current Assignee: Florida State University Research Foundation, Inc. (State University System of Florida)
• Original Assignee: Florida State University (State University System of Florida)
• Inventors: Schlenoff, Joseph B.
• Primary Examiner(s): Jagannathan; Vasu
• Assistant Examiner(s): Krylova; Irina
• Application Number:
  US10/594,185
• Publication Number:
  US 20070265174A1
• Time in Patent Office: 1,870 Days
• Field of Search: 525/199, 525/200, 428/421, 428/422, 429/316, 508/106, 508/588, 508/589, 508/590
• US Class Current: 428/421
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: C08F 8/20 Halogenation
• CPC Class Codes: Y10T 428/3154 Of fluorinated addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31544 Addition polymer is perhalogenated

Abstract

A polyelectrolyte film is provided, the polyelectrolyte film comprises an interpenetrating network of a net positively charged polymer and a net negatively charged polymer, wherein the net positively charged polymer, the net negatively charged polymer, or both contain polymer repeat units with at least two fluorine atoms.

Claims

1. A polyelectrolyte film comprising a multilayer comprising an interpenetrating network of a net positively charged polyelectrolyte polymer comprising repeat units with at least two fluorine atoms and a net negatively charged polyelectrolyte polymer comprising repeat units with at least two fluorine atoms, and

further comprising a perfluorinated counterion within the multilayer,

wherein the perfluorinated counterion comprises a fluorinated alkanesulfonic acid, a fluorinated alkanecarboxylic acid, or both;

an alkane component of the acid having a molecular weight up to 300 g per mole; and

at least four fluorine atoms.

2. The polyelectrolyte film of claim 1 wherein the net positively charged polymer and the net negatively charged polymer are independently selected from the group consisting of polyolefins, polyamines, polyamides, polyethers, polyesters, polyimides, polysulfones, polyaryls, polyphenols, polyaramides, and copolymers thereof.

3. The polyeleotrolyte film of claim 2 wherein the repeat unit has the structure:

4. The polyelectrolyte film of claim 2 wherein the polymer repeat unit comprises an allyl group having the structure:

5. The polyelectrolyte film of claim 1 wherein the net positively charged polymer and the net negatively charged polymer are polyolefins having vinyl groups.

6. The polyelectrolyte film of claim 5 wherein the vinyl group is an allyl group.

7. The polyelectrolyte film of claim 1 wherein the net positively charged polymer has the structure;

8. The polyelectrolyte film of claim 1 wherein the net negatively charged polymer has the structure:

9. The polyelectrolyte film of claim 1 further comprising particles having a size in the range of about 1 nanometer to about 10 micrometers.

10. The polyelectrolyte film of claim 9 wherein the particles are selected from the group consisting of silicon dioxide, aluminum oxide, titanium dioxide, iron oxide, oxide, vanadium oxide, clay minerals, carbon fibers, carbon nanotubes, and charged fluorinated particles.

11. The polyelectrolyte film of claim 10 wherein the particle is the clay mineral, and the clay mineral comprises attapulgite clay.

12. The polyelectrolyte film of claim 1 wherein the film is adapted for reducing friction at a surface.

13. The polyelectrolyte film of claim 12 wherein said surface is selected from the group consisting of metals, plastic, semiconductor, and metal oxide.

14. The polyelectrolyte film of claim 1 in contact with and on a surface of a rotating disc magnetic storage medium (“

fixed disc”

).

15. The polyelectrolyte film of claim 1 in contact with and on a surface of a rotating disc magnetic storage medium (“

fixed disc”

) wherein the polyelectrolyte film further comprises a surface layer comprising a fluorinated small molecule or a fluorinated oligomer.

16. The polyelectrolyte film of claim 1 formed between two contacting, moving metal surfaces.

17. The polyelectrolyte film of claim 1 formed between two contacting, moving metal surfaces, said polyelectrolyte film formed by the addition of particles of complexed fluorinated polyelectrolytes.

18. The polyelectrolyte film of claim 1 forming an intermediate layer between an electrically conductive contact and a thin film of medium, said medium emitting light on passage of an electrical current.

19. The polyelectrolyte film of claim 1 forming an intermediate layer between an electrically conductive contact and a light emitting medium, said contact injecting electrons into said medium.

20. The polyelectrolyte film of claim 1 forming an intermediate layer between an electrically conductive contact and a light emitting medium, said medium comprising a conjugated polymer.

21. The polyelectrolyte film of claim 1 having a thickness of less than 1 micrometer.

22. A film comprising multilayers of a charged polyelectrolyte polymer comprising repeat units with at least two fluorine atoms electrostatically complexed with a perfluorinated charged particle comprising repeat units with at least two fluorine atoms, wherein the charge of the polyelectrolyte polymer is opposite that of the charge of the perfluorinated charge particle, wherein the multilayers comprise layer pairs and each layer pair comprises the polyelectrolyte polymer electrostatically complexed with the perfluorinated charged particle, and the multilayers are created from the polyelectrolyte polymer and an aqueous dispersion or suspension of the fluorinated polymer particles.

23. The film of claim 22 wherein the perfluorinated charged particle comprises polytetrafluoroethylene.

24. The film of claim 22 wherein the polyelectrolyte polymer comprises a plurality of charged repeat units with at least two fluorine atoms.