CN-122029242-A - Solution composition for graphene-coated steel sheet and coated steel sheet coated with the same

Abstract

The solution composition for a graphene-coated steel sheet according to one embodiment may include 0.1 to 30% by weight of graphene and 55 to 90% by weight of a main resin including 2 or more acrylic-based resins, relative to 100% by weight of solids.

Inventors

• LIU HUIZHEN
• Bian Changshi
• JIN ZHENGSHOU

Assignees

• 浦项股份有限公司

Dates

Publication Date

20260512

Application Date

20231220

Priority Date

20231017

Claims (14)

1. 1. A solution composition for graphene-coated steel sheet, wherein the solution composition comprises, with respect to 100% by weight of solids: 0.1-30 wt% graphene; 55 to 90% by weight of a main resin containing 2 or more acrylic-based resins.
2. 2. The solution composition for graphene-coated steel sheets according to claim 1, wherein the 2 or more acrylic-based resins are 2 or more selected from the group consisting of copolymers of Ethylene Acrylic Acid (EAA) and Polyethylene (PE), copolymers of Ethylene Acrylic Acid (EAA) and Polyurethane (PU), polymethyl methacrylate, polyacrylonitrile, cyclohexyl acrylate, glycidyl acrylate, and hydroxyalkyl acrylate.
3. 3. The solution composition for graphene-coated steel sheet according to claim 1, wherein the main resin further comprises at least one selected from the group consisting of epoxy-based resin, urethane-based resin, fluorine-based resin, polyester-based resin, polyethylene-based resin, and vinyl chloride-based resin.
4. 4. The solution composition for a graphene-coated steel sheet according to claim 3, wherein the epoxy-based resin is at least one selected from the group consisting of bisphenol a-type resin, bisphenol F-type resin, novolac resin, acrylic-modified epoxy resin, alicyclic resin, and glycidylamine-type resin.
5. 5. The solution composition for a graphene-coated steel sheet according to claim 3, wherein the urethane-based resin is at least one selected from the group consisting of polyurethane, acrylic polyol and polyisocyanate prepared from isophorone diisocyanate, adipic acid and polyol.
6. 6. The solution composition for graphene-coated steel sheets according to claim 3, wherein the fluorine-based resin is a fluorine-based polyurethane resin obtained using a perfluoroalkyl alcohol, a perfluorinated acrylic polyol, a fluorinated polyolefin-based polyol, or a mixture thereof, or at least one selected from the group consisting of poly-alpha-fluoroacrylate, block poly-alpha-fluoroacrylate, polyethyl-alpha-fluoroacrylate, and polyfluoroalkyl acrylate.
7. 7. The solution composition for graphene-coated steel sheet according to claim 1, wherein the composition further comprises a physical property improver or other additives.
8. 8. The solution composition for graphene-coated steel sheets according to claim 7, wherein the physical property-improving agent is at least one selected from the group consisting of titanium-based compounds, ammonium phosphate salts, vanadium-based compounds, organic phosphoric acids, amine phosphate salts, and organic acids.
9. 9. The solution composition for a graphene-coated steel sheet according to claim 7, wherein the content of the physical property-improving agent is 5-40% by weight with respect to 100% by weight of solids.
10. 10. The solution composition for a graphene-coated steel sheet according to claim 7, wherein the other additive is at least one selected from a leveling agent, a wetting agent, a curing agent, and an antifoaming agent.
11. 11. The solution composition for a graphene-coated steel sheet according to claim 7, wherein the content of the other additive is 1 to 5% by weight with respect to 100% by weight of solids.
12. 12. The solution composition for graphene-coated steel sheet according to claim 1, wherein the composition further comprises a balance of a solvent, the solvent being at least one selected from the group consisting of water, 1-ethyl-2-pyrrolidone (NEP) and dimethyl sulfoxide (DMSO).
13. 13. A graphene coated steel sheet, comprising: coated steel sheet, and A coating layer formed from the solution composition for graphene-coated steel sheet according to any one of claims 1 to 12 on at least one side of the steel sheet.
14. 14. The graphene coated steel sheet according to claim 13, wherein the plated steel sheet is at least one selected from a galvanized steel sheet, a zinc-based alloy plated steel sheet, an aluminum-based alloy plated steel sheet, a cold-rolled steel sheet, and a hot-rolled steel sheet.

Description

Solution composition for graphene-coated steel sheet and coated steel sheet coated with the same Technical Field The invention relates to a solution composition for graphene-coated steel plates and a coated steel plate coated by the solution composition. Background Graphene (Graphene) is a substance having a two-dimensional (2D) crystal structure in which carbon atoms are connected in a hexagonal shape, and has a monoatomic layer thickness formed by a specific arrangement. Graphene has a tensile strength 311 times stronger than steel, an electron mobility 1000 times faster than silicon, a thermal conductivity 10 times or more excellent than copper, has a transparency of 98% light transmission, and has a property of maintaining characteristics even when bent or stretched. Due to such characteristics, it can be widely applied to nanomaterials, inks, barrier materials, heat dissipation materials, ultra-lightweight materials, energy electrode materials, new-generation semiconductors, transparent electrodes, and the like. In order to simply coat such graphene on a substrate in a large area, a solution process is widely used. In the case of the solution process, a separate adhesive is required in order to ensure adhesion with the substrate. Therefore, it is required to individually select an adhesive having a sufficient binding force while dispersing graphene well, and to obtain a sufficient dispersing effect, it is required to appropriately select a dispersing agent that does not adversely affect the physical properties of the coating composition, which is the current state of the art. Disclosure of Invention First, the technical problem to be solved According to one embodiment of the present invention, there may be provided a solution composition for a graphene-coated steel sheet having excellent dispersion stability. According to another embodiment of the present invention, a graphene-coated plated steel sheet excellent in corrosion resistance and adhesion can be provided. (II) technical scheme The solution composition for a graphene-coated steel sheet according to one embodiment of the present invention comprises 0.1 to 30% by weight of graphene and 55 to 90% by weight of a main resin comprising 2 or more acrylic-based resins, relative to 100% by weight of solids. The 2 or more acrylic-based resins may be 2 or more selected from the group consisting of copolymers of Ethylene Acrylic Acid (EAA) and Polyethylene (PE), copolymers of Ethylene Acrylic Acid (EAA) and Polyurethane (PU), polymethyl methacrylate, polyacrylonitrile, cyclohexyl acrylate, glycidyl acrylate, and hydroxyalkyl acrylate. The main resin may further include at least one selected from the group consisting of epoxy-based resins, urethane-based resins, fluorine-based resins, polyester-based resins, polyethylene-based resins, and vinyl chloride-based resins. The epoxy-based resin may be at least one selected from bisphenol a type resin, bisphenol F type resin, novolac resin, acrylic modified epoxy resin, alicyclic resin, and glycidylamine type resin. The urethane-based resin may be at least one selected from isophorone diisocyanate, polyurethane prepared from adipic acid and polyol, acrylic polyol, and polyisocyanate. The fluorine-based resin may be a fluorine-based polyurethane resin obtained using a perfluoroalkyl alcohol, a perfluorinated acrylic polyol, a fluorinated polyolefin-based polyol, or a mixture thereof, or at least one selected from the group consisting of poly-alpha-fluoroacrylate, block poly-alpha-fluoroacrylate, polyethyl-alpha-fluoroacrylate, and polyfluoroalkyl acrylate. The composition may further comprise physical property modifiers or other additives. The physical property modifier may be at least one selected from the group consisting of titanium-based compounds, ammonium phosphate salts, vanadium-based compounds, organic phosphoric acids, amine phosphate salts, and organic acids. The physical property modifier may be contained in an amount of 5 to 40% by weight relative to 100% by weight of solids. The other additive may be at least one selected from the group consisting of a leveling agent, a wetting agent, a curing agent, and an antifoaming agent. The other additives may be contained in an amount of 1 to 5% by weight relative to 100% by weight of solids. The composition may further comprise a solvent, and the solvent may be at least one selected from the group consisting of water, 1-Ethyl-2-pyrrolidone (1-Ethyl-2-Pyrrolidinone, NEP) and dimethyl sulfoxide (Dimethyl Sulfoxide, DMSO). The graphene-coated steel sheet according to another embodiment of the present invention includes a plated steel sheet, and a coating layer formed on at least one side of the steel sheet from the above-described solution composition for graphene-coated steel sheet. The plated steel sheet may be at least one selected from the group consisting of a galvanized steel sheet, a zinc-based alloy plated steel sheet, an aluminum-based alloy plated stee