CN111944410A - Novel water-based graphene polyurethane coating - Google Patents
Novel water-based graphene polyurethane coating Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/24—Electrically-conducting paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/32—Radiation-absorbing paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/001—Conductive additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/04—Antistatic
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The invention provides a novel water-based graphene polyurethane coating, and relates to the technical field of water-based coatings. The novel aqueous graphene-based polyurethane coating comprises 45-60 parts of aqueous polyurethane, 8-15 parts of modified epoxy resin, 3-5 parts of aqueous pigment, 0.5-1 part of defoaming agent, 2-3 parts of talcum powder, 2.5-4 parts of barite powder, 5-7 parts of modified graphene, 1-3 parts of plasticizer, 5-7 parts of film-forming assistant and 2-4 parts of flatting agent. According to the invention, the polyurethane coating is compounded with the graphene, so that the strength of the polyurethane coating is greatly improved, the antistatic and heat-proof performances of the polyurethane coating are improved by utilizing the excellent electric conduction and heat conduction capabilities of the graphene, and the graphene is subjected to activation treatment by utilizing a chemical and physical combined mode, so that the condition that the performance of the polyurethane coating is reduced due to the agglomeration effect generated when the graphene is compounded with the polyurethane coating can be prevented, and the practicability of the coating is greatly improved.
Description
Technical Field
The invention relates to the technical field of water-based coatings, and particularly relates to a novel water-based graphene polyurethane coating.
Background
Graphene (Graphene) is a carbon-derived materialRadical sp2The hybrid tracks form a hexagonal honeycomb lattice two-dimensional carbon nanomaterial. Graphene has excellent optical, electrical and mechanical properties, has important application prospects in the aspects of materials science, micro-nano processing, energy, biomedicine, drug delivery and the like, is considered to be a revolutionary material in the future, and graphene and composite materials have been widely researched and applied in the fields of conductive materials, flame retardant materials, high polymer modification, energy storage, conversion and the like so far.
Polyurethanes are known under the full name of polyurethane. A polymer compound. This was produced in 1937 by o. Polyurethanes fall into the two main categories of polyester and polyether. They can be made into polyurethane plastics (mainly foamed plastics), polyurethane fibers (China is called spandex), polyurethane rubber and elastomers, and the soft Polyurethane (PU) mainly has a thermoplastic linear structure, has better stability, chemical resistance, rebound resilience and mechanical property than PVC foaming materials, and has smaller compression deformability. Good heat insulation, sound insulation, shock resistance and gas defense performance. Therefore, the product is used as a packaging, sound insulation and filtering material. The hard PU plastic has the advantages of light weight, excellent sound insulation and heat insulation performance, chemical resistance, good electrical property, easy processing and low water absorption rate. It is mainly used as a heat-insulating structural material in the building, automobile and aviation industries. The polyurethane elastomer has the performance between that of plastic and rubber, and has the advantages of oil resistance, wear resistance, low temperature resistance, aging resistance, high hardness and elasticity. Is mainly used in the shoe making industry and the medical industry. The polyurethane can be used for preparing adhesives, coatings, synthetic leather and the like, the waterborne polyurethane is a novel polyurethane system which takes water as a dispersion medium instead of an organic solvent, is also called as water-dispersed polyurethane, water-system polyurethane or water-based polyurethane, has high elasticity, good flexibility, higher elastic modulus and excellent wear resistance, has excellent performances of weather resistance, oil resistance, grease resistance, resistance to various solvents and the like, and is widely applied to various industrial fields because of various forms and simple forming process.
The existing waterborne polyurethane coating as a common high polymer material has the advantages, but also has low strength and poor heat resistance, antistatic property, flame retardance and the like, so that the further application of the coating is limited.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a novel aqueous graphene polyurethane coating, which solves the problems of low strength, poor heat resistance, poor antistatic property, poor flame retardance and the like of the existing aqueous polyurethane coating.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a novel water-based graphene polyurethane coating comprises a coating formula and a production method, wherein the production method comprises the following steps:
s1, grinding the expanded graphite to 600-800 meshes by ball milling, and preparing graphene oxide by a Hummers method;
s2, adding the prepared graphene oxide into deionized water, adding the graphene oxide into 40% -80% hydrazine hydrate aqueous solution, and performing ultrasonic treatment on the solution for 1-3min by using ultrasonic waves to enable a single graphene oxide to form a plurality of hydrophilic groups;
s3, filtering out graphene by using a superfine filter screen, washing away residual hydrazine hydrate aqueous solution by using deionized water, and adding the graphene into the deionized water to form turbid liquid;
s4, adding deionized water into a heatable stirring device containing 45-60 parts of waterborne polyurethane and 5-15 parts of modified epoxy resin, slowly heating to 80-95 ℃, and stirring for 4-6 min;
s5, after stirring for 4-6min, sequentially adding 2-3 parts of talcum powder, 2.5-4 parts of barite powder, 3-5 parts of water-based pigment and 1-3 parts of plasticizer, cooling to 90-100 ℃, and continuing to stir for 5-10 min;
s6, adding 0.5-1 part of defoaming agent, 5-7 parts of film forming additive and graphene suspension into stirring equipment, continuously stirring for 5-10min, and performing ultrasonic oscillation treatment on the mixed solution by using ultrasonic waves to prevent the graphene from generating an agglomeration effect;
and S7, naturally cooling to normal temperature when the water content of the material is 50-60%, taking out the material, and barreling and packaging.
Preferably, the coating formula comprises 45-60 parts of waterborne polyurethane, 8-15 parts of modified epoxy resin, 3-5 parts of water-based pigment, 0.5-1 part of defoaming agent, 2-3 parts of talcum powder, 2.5-4 parts of barite powder, 5-7 parts of modified graphene, 1-3 parts of plasticizer, 5-7 parts of film-forming assistant and 2-4 parts of flatting agent.
Preferably, the particle sizes of the talcum powder and the barite powder are both 10-30 um.
Preferably, the film-forming aid is an alcohol ester dodecafilm-forming aid existing in the market.
Preferably, the leveling agent may be one of polyacrylic acid, carboxymethyl cellulose, or a surfactant.
(III) advantageous effects
The invention provides a novel water-based graphene polyurethane coating. The method has the following beneficial effects:
1. according to the invention, through the composition of the polyurethane and the graphene, the strength of the polyurethane coating is greatly improved, the antistatic and heat-proof performance of the polyurethane coating is improved by utilizing the excellent electric conduction and heat conduction capability of the graphene, and the practicability of the coating is greatly improved.
2. According to the invention, the graphene is activated by using a chemical and physical combined mode, so that the condition that the performance of the polyurethane coating is reduced due to the agglomeration effect when the graphene is compounded with the polyurethane coating can be prevented, and the practicability of the coating is enhanced.
3. According to the invention, by adding the talcum powder and the barite powder, a certain flame retardance can be improved under the condition of increasing a certain radiation absorption capacity, and the practicability of the coating is enhanced.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
the embodiment of the invention provides a novel water-based graphene polyurethane coating, which comprises a coating formula and a production method, wherein the production method comprises the following steps:
s1, grinding the expanded graphite to 600 meshes by using a ball mill, and preparing graphene oxide by using a Hummers method;
s2, adding the prepared graphene oxide into deionized water, adding the graphene oxide into a 40% hydrazine hydrate aqueous solution, and carrying out ultrasonic treatment on the solution for 1min by using ultrasonic waves to enable a single graphene oxide to form a plurality of hydrophilic groups;
s3, filtering out graphene by using a superfine filter screen, washing away residual hydrazine hydrate aqueous solution by using deionized water, and adding the graphene into the deionized water to form turbid liquid;
s4, adding deionized water into a heatable stirring device containing 58 parts of waterborne polyurethane and 10 parts of modified epoxy resin, slowly heating to 80 ℃, and stirring for 6 min;
s5, after stirring for 4min, sequentially adding 3 parts of talcum powder, 4 parts of barite powder, 5 parts of water-based pigment and 3 parts of plasticizer, cooling to 95 ℃, and continuing stirring for 10 min;
s6, adding 1 part of defoaming agent, 7 parts of film forming additive and the graphene suspension into stirring equipment, continuously stirring for 10min, and performing ultrasonic oscillation treatment on the mixed solution by using ultrasonic waves to prevent the graphene from generating an agglomeration effect;
and S7, naturally cooling to a normal temperature state when the water content of the material is up to 60%, taking out the material, and barreling and packaging.
The coating comprises 58 parts of waterborne polyurethane, 10 parts of modified epoxy resin, 3 parts of waterborne pigment, 1 part of defoaming agent, 3 parts of talcum powder, 4 parts of barite powder, 7 parts of modified graphene, 3 parts of plasticizer, 7 parts of film-forming aid and 4 parts of leveling agent, wherein the particle sizes of the talcum powder and the barite powder are both 10-30 micrometers, the film-forming aid is the existing alcohol ester dodeca film-forming aid in the market, and the leveling agent is polyacrylic acid.
Example two:
the difference between the present embodiment and the first embodiment is: a novel water-based graphene polyurethane coating comprises a coating formula and a production method, wherein the production method comprises the following steps:
s1, grinding the expanded graphite to 700 meshes by using a ball mill, and preparing graphene oxide by using a Hummers method;
s2, adding the prepared graphene oxide into deionized water, adding the graphene oxide into a 600% hydrazine hydrate aqueous solution, and carrying out ultrasonic treatment on the solution for 2min by using ultrasonic waves to enable a single graphene oxide to form a plurality of hydrophilic groups;
s3, filtering out graphene by using a superfine filter screen, washing away residual hydrazine hydrate aqueous solution by using deionized water, and adding the graphene into the deionized water to form turbid liquid;
s4, heating 53 parts of waterborne polyurethane and 15 parts of modified epoxy resin in a stirring device, adding deionized water, slowly heating to 90 ℃, and stirring for 5 min;
s5, after stirring for 5min, sequentially adding 2 parts of talcum powder, 2.5 parts of barite powder, 3-5 parts of water-based pigment and 1-3 parts of plasticizer, cooling to 90 ℃, and continuing stirring for 8 min;
s6, adding 0.5 part of defoaming agent, 7 parts of film forming additive and the graphene suspension into stirring equipment, continuously stirring for 10min, and performing ultrasonic oscillation treatment on the mixed solution by using ultrasonic waves to prevent the graphene from generating an agglomeration effect;
and S7, naturally cooling to a normal temperature state when the water content of the material is 50, taking out the material, and barreling and packaging.
The coating comprises 53 parts of waterborne polyurethane, 15 parts of modified epoxy resin, 5 parts of waterborne pigment, 0.5 part of defoaming agent, 2 parts of talcum powder, 2.5 parts of barite powder, 5 parts of modified graphene, 3 parts of plasticizer, 7 parts of film-forming assistant, 2 parts of leveling agent, wherein the particle sizes of the talcum powder and the barite powder are both 10-30 micrometers, the film-forming assistant is the existing alcohol ester dodecafilming assistant in the market, and the leveling agent is carboxymethyl cellulose.
The difference between the present embodiment and the first and second embodiments is: a novel water-based graphene polyurethane coating comprises a coating formula and a production method, wherein the production method comprises the following steps:
s1, grinding the expanded graphite to 800 meshes by using a ball mill, and preparing graphene oxide by using a Hummers method;
s2, adding the prepared graphene oxide into deionized water, adding the deionized water into 80% hydrazine hydrate aqueous solution, and performing ultrasonic treatment on the solution for 3min by using ultrasonic waves to enable single graphene oxide to form a plurality of hydrophilic groups;
s3, filtering out graphene by using a superfine filter screen, washing away residual hydrazine hydrate aqueous solution by using deionized water, and adding the graphene into the deionized water to form turbid liquid;
s4, adding deionized water into a heatable stirring device containing 60 parts of waterborne polyurethane and 15 parts of modified epoxy resin, slowly heating to 95 ℃, and stirring for 6 min;
s5, after stirring for 4-6min, sequentially adding 2-3 parts of talcum powder, 2.5-4 parts of barite powder, 3-5 parts of water-based pigment and 1-3 parts of plasticizer, cooling to 90-100 ℃, and continuing to stir for 5-10 min;
s6, adding 0.5-1 part of defoaming agent, 5-7 parts of film forming additive and graphene suspension into stirring equipment, continuously stirring for 5-10min, and performing ultrasonic oscillation treatment on the mixed solution by using ultrasonic waves to prevent the graphene from generating an agglomeration effect;
and S7, naturally cooling to normal temperature when the water content of the material is 50-60%, taking out the material, and barreling and packaging.
The coating comprises 60 parts of waterborne polyurethane, 15 parts of modified epoxy resin, 3 parts of waterborne pigment, 1 part of defoaming agent, 2 parts of talcum powder, 4 parts of barite powder, 7 parts of modified graphene, 1 part of plasticizer, 5 parts of film-forming aid and 2 parts of flatting agent, wherein the particle sizes of the talcum powder and the barite powder are both 10-30 micrometers, the film-forming aid is the existing alcohol ester dodeca film-forming aid in the market, and the flatting agent is surfactant.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A novel water-based graphene polyurethane coating comprises a coating formula and a production method, and is characterized in that: the production method comprises the following steps:
s1, grinding the expanded graphite to 600-800 meshes by ball milling, and preparing graphene oxide by a Hummers method;
s2, adding the prepared graphene oxide into deionized water, adding the graphene oxide into 40% -80% hydrazine hydrate aqueous solution, and performing ultrasonic treatment on the solution for 1-3min by using ultrasonic waves to enable a single graphene oxide to form a plurality of hydrophilic groups;
s3, filtering out graphene by using a superfine filter screen, washing away residual hydrazine hydrate aqueous solution by using deionized water, and adding the graphene into the deionized water to form turbid liquid;
s4, adding deionized water into a heatable stirring device containing 45-60 parts of waterborne polyurethane and 5-15 parts of modified epoxy resin, slowly heating to 80-95 ℃, and stirring for 4-6 min;
s5, after stirring for 4-6min, sequentially adding 2-3 parts of talcum powder, 2.5-4 parts of barite powder, 3-5 parts of water-based pigment and 1-3 parts of plasticizer, cooling to 90-100 ℃, and continuing to stir for 5-10 min;
s6, adding 0.5-1 part of defoaming agent, 5-7 parts of film forming additive and graphene suspension into stirring equipment, continuously stirring for 5-10min, and performing ultrasonic oscillation treatment on the mixed solution by using ultrasonic waves to prevent the graphene from generating an agglomeration effect;
and S7, naturally cooling to normal temperature when the water content of the material is 50-60%, taking out the material, and barreling and packaging.
2. The novel aqueous graphene polyurethane coating according to claim 1, wherein: the coating comprises, by weight, 45-60 parts of waterborne polyurethane, 8-15 parts of modified epoxy resin, 3-5 parts of water-based pigment, 0.5-1 part of defoaming agent, 2-3 parts of talcum powder, 2.5-4 parts of barite powder, 5-7 parts of modified graphene, 1-3 parts of plasticizer, 5-7 parts of film-forming assistant and 2-4 parts of flatting agent.
3. The novel aqueous graphene polyurethane coating according to claim 1, wherein: the particle sizes of the talcum powder and the barite powder are both 10-30 um.
4. The novel aqueous graphene polyurethane coating according to claim 1, wherein: the film-forming additive is the alcohol ester dodecafilm-forming additive existing in the market.
5. The novel aqueous graphene polyurethane coating according to claim 1, wherein: the leveling agent can be one of polyacrylic acid, carboxymethyl cellulose or surfactant.
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| CN202010924494.8A CN111944410A (en) | 2020-09-05 | 2020-09-05 | Novel water-based graphene polyurethane coating |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116042009A (en) * | 2023-02-10 | 2023-05-02 | 深圳市深赛尔股份有限公司 | Antistatic agent, preparation method and application thereof |
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