Hydrophobic flourinated coating
The invention at hand concerns hydrophobic polymer surfaces, in particular superhydrophobic polymer surfaces, comprising at least one homo- or copolymer, which comprises at least one side chain with at least one fluoro-substituted aryl group. Furthermore, the invention at hand concerns a method for the production of polymer surfaces of this type, their use and polymers of the general formula I: wherein n is an integer between 10 and 4,500, preferably between 20 and 2,200 and particularly preferably between 100 and 670.
1. A hydrophobic coating consisting of a polymer surface being formed of at least one homo- or copolymer, which has at least one side chain having at least one fluoro-substituted aryl group, wherein said homopolymer is a polymer selected from the group consisting of poly-2,3,4,5,6-pentafluorostyrene, poly-2-fluorostyrene, poly-3-fluorostyrene, poly-4-fluorostyrene, F5-PPX (poly-p-xylene), as well as homopolymers of 2-fluoroaryl-/3-fluoroaryl-/4-fluoroaryl-/ and 2,3,4,5,6-pentafluoroaryl-substituted vinyl monomers and wherein said copolymer is formed of a monomer selected from the group consisting of 2,3,4,5,6-pentafluorostyrene, 2-fluorostyrene, 3-fluorostyrene, 4-fluorostyrene, F5-PPX (poly-p-xylene), and combinations thereof and a monomer selected from the group comprising styrene, substituted styrene derivatives, 5,6-benzo-2-methylene-1,3-dioxepane, methyl methacrylate, N-phenylmaleimide and combinations thereof, wherein the polymer surface is produced through an electrospinning method.
2. The hydrophobic coating according to claim 1 , wherein the at least one fluoro-substituted aryl group is a mono-, di-, tri-, tetra- or pentafluorophenyl group.
3. The hydrophobic coating according to claim 1 , wherein the at least one fluoro-substituted aryl group is a 2,3,4,5,6-pentafluorophenyl-, 2-fluorophenyl-, 3-fluorophenyl- or 4-fluorophenyl group.
4. The hydrophobic coating according to claim 1 , wherein the at least one fluoro-substituted aryl group is covalently bound over a spacer group.
5. The hydrophobic coating the of claim 4 , wherein the spacer group is one of a C 1 -C 20 alkyl group, a C 1 -C 5 alkyl group and a methylene or ethylene group, or the at least one fluoro-substituted aryl group is covalently bound directly to the primary polymer chain.
6. The hydrophobic coating according to claim 1 , wherein the at least one homo- or copolymer comprises at least 10 mol-% fluoro-substituted aryl groups.
7. The hydrophobic coating of claim 6 , wherein the at least one homo- or copolymer comprises at least 20 mol-% fluoro-substituted aryl groups.
8. The hydrophobic coating of claim 7 , wherein the at least one homo- or copolymer comprises at least 30 to 70 mol-% fluoro-substituted aryl groups.
9. The hydrophobic coating of claim 1 , wherein the weight-averaged molecular weight of the at least one homopolymer or copolymer is 10,000 to 1,000,000 g/mol.
10. The hydrophobic coating of claim 9 , wherein the weight-averaged molecular weight of the at least one homopolymer or copolymer is 50,000 to 300,000 g/rnol.
11. The hydrophobic coating according to claim 1 , wherein the at least one homo- or copolymer comprises a weight-averaged molecular weight of 1,000 to 2,000,000 g/mol.
12. The hydrophobic coating of claim 11 , wherein the particles of the polymer surface comprise an average diameter of between 1 nm and 2 μm.
13. The hydrophobic coating of claim 12 , wherein the particles of the polymer surface comprise an average diameter between 500 nm and 1 μm.
14. The hydrophobic coating according to claim 1 , wherein the polymer surface is formed in the form of particles or particles connected through fibers.
15. The hydrophobic coating according to claim 14 , wherein the particles of the polymer surface comprise an average diameter of less than 3 μm.
16. The hydrophobic coating according to claim 15 , wherein the surface comprises a contact angle of at least 140° in water.
17. The hydrophobic coating according to claim 16 , wherein the surface comprises a contact angle of at preferably of at least 160° in water.
18. The hydrophobic coating according to claim 1 , wherein the surface comprises a contact angle of at least 120° in water.
19. The hydrophobic coating according to claim 1 , wherein the surface comprises a water-roll angle of maximally 50°.
20. The hydrophobic coating according to claim 1 , wherein the surface comprises a water-roll angle of maximally 40°.
21. The hydrophobic coating according to claim 20 , wherein the surface comprises a water-roll angle of 0°.