Preparation of layer-by-layer materials and coatings from ionic liquids
AssigneeThe Regents of the University of Michigan
InventorNicholas A. Kotov
Life of this patent
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Abstract
A method for making a layered material can include providing a substrate having a surface with at least one region having a charge and forming layers by sequentially contacting the at least one region with a first solution and a second solution. The first solution comprises a first layering material in an ionic liquid and the second solution comprises a second layering material in a second ionic solution. The first and second layering materials can have a chemical affinity to each other. The first layering material and/or the second layering material can include polyelectrolytes, polymers, carbon nanotubes, or combinations thereof.
Claims22
A method for layer-by-layer assembly of a material comprising:
- (a) applying a first composition comprising a first ionic liquid having a melting point at or below room temperature and a first layering material to a surface to form a first layer;
- and
- (b) applying a second composition comprising a second ionic liquid having a melting point at or below room temperature and a second layering material to the first layer to form a second layer, wherein the first composition and the second composition are compositionally distinct from one another.
A method for layer-by-layer assembly of a material comprising:
- (a) applying a first composition comprising a first ionic liquid having a melting point at or below room temperature and a first layering material to a surface to form a first layer;
- and
- (b) applying a second composition comprising a second ionic liquid having a melting point at or below room temperature and a second layering material to the first layer to form a second layer, wherein the first composition and the second composition are compositionally distinct from one another and the first ionic liquid comprises a first charged species selected from the group consisting of organic cations, organic anions and inorganic anions, and the second ionic liquid comprises a second charged species having an opposite charge from the first charged species selected from the group consisting of organic cations, organic anions and inorganic anions.
A method for layer-by-layer assembly of a material comprising:
- (a) applying a first composition comprising a first ionic liquid and a first layering material to a surface to form a first layer;
- and
- (b) applying a second composition comprising a second ionic liquid and a second layering material to the first layer to form a second layer, wherein the first composition and the second composition are compositionally distinct from one another and the first ionic liquid and the second ionic liquid are independently selected from the group consisting of:
- imidazolium, pyridinium, pyridazinium, pyrimidinium, pyrazinium, pyrazolium, oxazolium, 1,2,3-triazolium, 1,2,4-triazolium, thiazolium, piperidinium, pyrrolidinium, quinolinium, isoquinolinium, trifluoromethylsulfonate, bis(trifluoromethylsulfonyl)imide, bis(perfluoroethylsulfonyl)imide, tris(trifluoromethylsulfonyl)methide, tetrafluoroborate, hexafluorophosphate, hexafluoroantimonate, hexafluoroarsenate, 1-Ethyl-3-methylimidazolium chloride, 1-Ethyl-3-methylimidazolium methanesulfonate, 1-Butyl-3-methylimidazolium chloride, 1-Butyl-3-methylimidazolium methanesulfonate, Methyl-tri-n-butylammonium methylsulfate, 1,2,4-Trimethylpyrazolium methylsulfate, 1-Ethyl-2,3-di-methylimidazolium ethylsulfate, 1,2,3-Trimethyl-imidazolium methylsulfate, Methylimidazolium chloride, Methylimidazolium hydrogensulfate, 1-Ethyl-3-methylimidazolium hydrogensulfate, 1-Ethyl-3-methylimidazolium tetrachloroaluminate, 1-Butyl-3-methylimidazolium hydrogensulfate, 1-Butyl-3-methylimidazolium tetrachloroaluminate, 1-Ethyl-3-methylimidazolium acetate, 1-Butyl-3-methylimidazolium acetate, 1-Ethyl-3-methylimidazolium ethylsulfate, 1-Butyl-3-methylimidazolium methylsulfate, 1-Ethyl-3-methylimidazolium thiocyanate, 1-Butyl-3-methylimidazolium thiocyanate, Choline acetate, Choline salicylate, Tris-(2-hydroxyethyl)-methylammonium methylsulfate, and combinations thereof.
Dependencies are inferred from the claim text.