Compositions for forming Polymer Brushes
The present invention relates to novel chemical solutions suitable for forming polymer brushes on a surface of a solid part. The present invention further relates to methods of forming polymer brushes on the surface of a solid part using the novel chemical solutions as well as solid parts having polymer brushes coated onto the surface and uses of such solid parts.
1 - 19 . (canceled)
20 . A polymerisation composition for forming polymer brushes on a surface of a substrate comprising:
one or more monomers provided as one or more of (i) a part of the polymerisation composition, or (ii) a discrete composition;
one or more solvents; and
one or more ligands;
wherein the polymerisation composition comprises one or more dormant transition metal catalysts derived from Cu or Fe and selected from Cu 2 O, CuO, CuSO 4 *5H 2 O, FeO, Fe 2 O 3 and Fe 2 O 4 in combination with the ligand capable of coordinating with the transition metal;
wherein the polymerisation composition is stable upon storage.
21 . The polymerisation composition according to claim 20 , wherein the polymerisation composition is stored at a temperature below 8° C.
22 . The polymerisation composition according to claim 20 , wherein that the monomers are selected from acrylates, methacrylates, halogen-substituted alkenes, acrylamides, methacrylamides, and styrenes, as well as mixtures thereof.
23 . The polymerisation composition according to claim 20 , wherein the ligand is a nitrogen-containing ligand.
24 . The polymerisation composition according to claim 23 , wherein the nitrogen-containing ligand is selected from the group consisting of N, N, N′, N″, N′″-pentamethyldiethylenetriamine (PMDETA), tris[2-(dimethylamino)ethyl]-amine (Me 6 TREN), tris(2-aminoethyl)amine (TREN), tris[2-pyridylmethyl)amine (TPMA) and 2,2′-dipyridil (BiPy).
25 . A reaction composition for forming polymer brushes on a surface of a substrate comprising:
a polymerisation composition as defined in any one of claims 20 - 24 ; and
an activation agent comprising one or more oxygen scavengers,
wherein the polymerisation composition can be activated on demand by the activation agent.
26 . The reaction composition according to claim 25 , wherein the polymerisation composition and the activation agent are provided as discrete compositions.
27 . The reaction composition according to claim 25 , wherein the one or more oxygen scavengers are selected from sodium ascorbate, ascorbic acid, hydrazine, hydrazine hydrate, sodium hypophosphite, a mixture of iron powder and sodium chloride, hydrogen carbonate, citric acid, and pyrogallic acid, as well as mixtures thereof.
28 . The reaction composition according to claim 25 , wherein the activation agent comprises a solvent.
29 . The reaction composition according to claim 25 , wherein the activation agent comprises one or more monomers.
30 . The reaction composition according to claim 29 , wherein the monomers are selected from acrylates, methacrylates, halogen-substituted alkenes, acrylamides, methacrylamides, and styrenes, as well as mixtures thereof.
31 . The reaction composition according to claim 25 , wherein the reaction composition is formed by mixing the polymerisation composition and the activation agent.
32 . The reaction composition according to claim 25 , wherein the activation agents regenerate the dormant transition metal catalyst into an active transition metal catalyst.
33 . A method of forming polymer brushes on a substrate comprising the steps of:
providing the substrate having polymerisation initiators attached to the surface of said substrate,
mixing a polymerisation composition and an activation agent, further comprising one or more monomers provided as one or more of (i) part of the polymerisation composition, (ii) part of the activation agent, or (iii) a discrete composition, to form a reaction composition,
wherein the polymerisation composition comprises one or more dormant transition metal catalysts derived from Cu and Fe and selected from Cu 2 O, CuO, CuSO 4 *5H 2 O, FeO, Fe 2 O 3 and Fe 2 O 4 in combination with a ligand capable of coordinating with the transition metal;
wherein the activation agent comprises one or more oxygen scavengers, and the method further comprising:
bringing the reaction composition and the substrate into contact either mixed prior to contact with the substrate, or mixed upon contact with the substrate, thereby initiating surface polymerisation on the substrate, whereby polymer brushes are formed via the polymerisation initiators on the surface of the substrate,
wherein the above steps are repeated so as to form another layer of polymer brushes.
34 . The method according to claim 33 , wherein the another layer of polymer brushes is different from the firstly formed layer of polymer brushes.
35 . The method according to claim 33 , wherein the another layer of polymer brushes is the same as the firstly formed layer of polymer brushes.
36 . The method according to claim 33 , wherein the firstly formed layer of polymer brushes is formed with glycidyl methacrylate (GMA) monomer and the another layer of polymer brushes is formed with glycidyl methacrylate (GMA) monomer.
37 . The method according to claim 33 , wherein the substrate is immersed in the reaction composition.
38 . The method according to claim 33 , wherein the reaction composition is sprayed or painted onto the substrate.
39 . The method according to claim 33 , wherein the substrate is brought into contact with either of the polymerisation composition and the activation agent, followed by adding the other of the polymerisation composition and the activation agent.