CN112852249A - Preparation and use methods of graphene polyether-ether-ketone anticorrosive high-temperature-resistant powder coating - Google Patents
Preparation and use methods of graphene polyether-ether-ketone anticorrosive high-temperature-resistant powder 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
- C09D161/00—Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
- C09D161/04—Condensation polymers of aldehydes or ketones with phenols only
- C09D161/16—Condensation polymers of aldehydes or ketones with phenols only of ketones with phenols
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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
- C09D5/03—Powdery paints
- C09D5/033—Powdery paints characterised by the additives
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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
- C09D5/08—Anti-corrosive paints
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/106—Anti-corrosive paints containing metal dust containing Zn
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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
- 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
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0893—Zinc
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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
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- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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Abstract
The invention relates to the technical field of coatings, in particular to a preparation method of graphene polyether-ether-ketone anticorrosive high-temperature-resistant powder coating, which comprises the following steps: s1: respectively weighing polyether-ether-ketone, polyphenylene sulfide, graphene nanoplatelets and zinc powder, fully mixing, and putting into a high-speed powder dispersing machine for dispersing; s2: taking out the mixed powder in the step S1, immediately performing melt extrusion in an extruder, and shearing into small particles; s3: naturally cooling the sheared particles to normal temperature, and then placing the particles at the ultralow temperature of-80 ℃ for freezing, crushing and grinding the particles into fine powder; s4: and (3) placing the ground material into a heated constant-temperature drying box for drying treatment at the drying temperature of 120 ℃ for 6 hours, naturally cooling to the normal temperature, and sealing and packaging to obtain the finished product powder coating. The graphene used by the invention is prepared by a physical stripping method, the surface is almost free of defects, and the cost is low; the coating has the advantages of high hardness, high strength, high temperature resistance, corrosion resistance, environmental protection, no pollution and the like.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to graphene polyether-ether-ketone anticorrosive high-temperature-resistant powder coating.
Background
Polyether ether ketone (PEEK) as a special polymer material has excellent strength and rigidity, high temperature resistance, good chemical stability and multiple chemical corrosion resistance, and only concentrated sulfuric acid can damage the structure of the PEEK in common chemical reagents. In addition, PEEK has excellent sliding property and very good coating property, is suitable for the surfaces of various materials, and has self-lubricating property. The PEEK coating is firm, even if sharp instruments are used for friction and scratch, the PEEK coating cannot be obviously scratched or fall off, and the ductility of the PEEK coating cannot be obviously influenced. However, in the hot working process of the PEEK material, amorphous crystals are easily formed inside, which causes internal stress concentration, resulting in local stress concentration and affecting the overall strength. Carbon fiber blending is commonly used to modify, but due to the agglomeration of the carbon fibers, uneven distribution of the carbon fibers in the PEEK matrix tends to result in poor overall material toughness.
Chinese patent (201710110299. X) discloses a preparation method of an anticorrosive wear-resistant non-stick polyether ether ketone-based coating. The method comprises the steps of firstly preparing micro powder by irradiating and cracking polytetrafluoroethylene resin, then carrying out pretreatment and grafting maleic anhydride, mixing and uniformly stirring the grafted polytetrafluoroethylene micro powder, carbon nanotube-polyamide fiber and polyether-ether-ketone resin, and then adding butyl acetate, a flatting agent, a defoaming agent and the like. The polyether-ether-ketone coating prepared by the method has poor compatibility, is easy to agglomerate to reduce the performance of the coating, and has complex process and no environmental protection.
Disclosure of Invention
In order to overcome the defects of the existing powder coating, the invention provides a graphene polyether-ether-ketone anticorrosive high-temperature-resistant powder coating.
The technical scheme adopted by the invention for solving the technical problems is as follows: a preparation method of graphene polyether-ether-ketone anticorrosive high-temperature-resistant powder coating comprises the following steps:
s1: respectively weighing polyether-ether-ketone, polyphenylene sulfide, graphene nanoplatelets and zinc powder, fully mixing, and putting into a high-speed powder dispersing machine for dispersing for 15 minutes to uniformly disperse each component;
s2: taking out the mixed powder in the step S1, immediately melting and extruding the mixed powder in an extruder, and shearing the powder into small particles, wherein the extrusion temperature is controlled at 380-400 ℃;
s3: naturally cooling the sheared particles to normal temperature, and then placing the particles at the ultralow temperature of-80 ℃ for freezing, crushing and grinding the particles into fine powder;
s4: and (3) placing the ground material into a heated constant-temperature drying box for drying treatment at the drying temperature of 120 ℃ for 6 hours, naturally cooling to the normal temperature, and sealing and packaging to obtain the finished product powder coating.
According to another embodiment of the present invention, the method further comprises step S1, wherein the particle size of the polyetheretherketone is 100-200 mesh, and the polyetheretherketone is a base material of the powder coating, and the weight portion is 30-60 portions.
According to another embodiment of the present invention, the method further comprises step S1, wherein the polyphenylene sulfide has a particle size of 300-500 mesh and a weight portion of 5-10.
According to another embodiment of the invention, the method further comprises step S1, wherein the particle size of the graphene microchip is 600-750 mesh, and the weight is 2-30 parts.
According to another embodiment of the invention, the method further comprises step S1, wherein the zinc powder has a particle size of 1000-1200 meshes and a weight of 1-5 parts.
According to another embodiment of the present invention, the method further comprises the step of making the particle size of the fine powder greater than or equal to 700 mesh in step S3.
A use method of graphene polyether-ether-ketone anticorrosion high-temperature-resistant powder coating comprises the following steps:
a1: carrying out oil removal and sand blasting treatment on the workpiece;
a2: soaking in a pickling tank for rust removal, then soaking in warm water in a rinsing tank, and putting in a constant-temperature oven for heating and drying at 120 ℃;
a3: and (4) spraying the graphene polyether ether ketone powder coating prepared in the step S4 onto the surface of a workpiece by an electrostatic spraying method, and solidifying and forming a film with the thickness of 20-50 microns after melting and leveling at the high temperature of 380 ℃ for 10 min.
The invention has the beneficial effects that: the graphene used by the invention is prepared by a physical stripping method, the surface is almost free of defects, and the cost is low; the graphene nanoplatelets are added in the preparation process of the powder coating, so that the mechanical strength and toughness of the powder coating are improved, and water and oxygen permeation can be further prevented by utilizing the sheet structure of the graphene; the coating has the advantages of high hardness, high strength, high temperature resistance, corrosion resistance, environmental protection, no pollution and the like; the polyether-ether-ketone is used as a base material of the powder coating, the polyphenylene sulfide can improve the leveling property of the coating, the graphene microchip can improve the density and mechanical strength of the coating, and the zinc powder is an antirust additive.
Detailed Description
A preparation method of graphene polyether-ether-ketone anticorrosive high-temperature-resistant powder coating comprises the following steps:
s1: respectively weighing polyether-ether-ketone, polyphenylene sulfide, graphene nanoplatelets and zinc powder, fully mixing, and putting into a high-speed powder dispersing machine for dispersing for 15 minutes to uniformly disperse each component;
s2: taking out the mixed powder in the step S1, immediately melting and extruding the mixed powder in an extruder, and shearing the powder into small particles, wherein the extrusion temperature is controlled at 380-400 ℃;
s3: naturally cooling the sheared particles to normal temperature, and then placing the particles at the ultralow temperature of-80 ℃ for freezing, crushing and grinding the particles into fine powder;
s4: and (3) placing the ground material into a heated constant-temperature drying box for drying treatment at the drying temperature of 120 ℃ for 6 hours, naturally cooling to the normal temperature, and sealing and packaging to obtain the finished product powder coating.
In the step S1, the particle size of the polyether-ether-ketone is 100-200 meshes, and the polyether-ether-ketone is used as a base material of the powder coating, and the weight portion is 30-60 portions.
In the step S1, the particle diameter of the polyphenylene sulfide is 300-500 meshes, and the weight part is 5-10 parts.
In the step S1, the particle size of the graphene microchip is 600-750 meshes, and the weight is 2-30 parts.
The particle size of the zinc powder in the step S1 is 1000-1200 meshes, and the weight is 1-5 parts.
The particle size of the fine powder in the step S3 is larger than or equal to 700 meshes.
A use method of graphene polyether-ether-ketone anticorrosion high-temperature-resistant powder coating comprises the following steps:
a1: carrying out oil removal and sand blasting treatment on the workpiece;
a2: soaking in a pickling tank for rust removal, then soaking in warm water in a rinsing tank, and putting in a constant-temperature oven for heating and drying at 120 ℃;
a3: and (4) spraying the graphene polyether ether ketone powder coating prepared in the step S4 onto the surface of a workpiece by an electrostatic spraying method, and solidifying and forming a film with the thickness of 20-50 microns after melting and leveling at the high temperature of 380 ℃ for 10 min.
The graphene used by the invention is prepared by a physical stripping method, the surface is almost free of defects, and the cost is low; the graphene nanoplatelets are added in the preparation process of the powder coating, so that the mechanical strength and toughness of the powder coating are improved, and water and oxygen permeation can be further prevented by utilizing the sheet structure of the graphene; the coating has the advantages of high hardness, high strength, high temperature resistance, corrosion resistance, environmental protection, no pollution and the like; the polyether-ether-ketone is used as a base material of the powder coating, the polyphenylene sulfide can improve the leveling property of the coating, the graphene microchip can improve the density and mechanical strength of the coating, and the zinc powder is an antirust additive.
The present invention is further illustrated by the following examples. It should be noted that the following examples are only limited to the present invention, but not intended to limit the scope of the present invention.
Example 1:
(1) respectively weighing 58 parts of polyether-ether-ketone, 10 parts of polyphenylene sulfide, 2 parts of graphene microchip and 5 parts of zinc powder, fully mixing, and putting the mixture into a powder high-speed dispersing machine for dispersing for 15 minutes to uniformly disperse all the components;
(2) taking out the mixed powder, immediately melting and extruding the powder in an extruder, and shearing the powder into small particles, wherein the extrusion temperature is controlled at 380-400 ℃;
(3) naturally cooling the sheared particles to normal temperature, and then placing the particles at the ultralow temperature of-80 ℃ for freezing, crushing and grinding the particles to fine powder (the particle size of the powder is more than or equal to 700 meshes);
(4) and (3) placing the ground material into a heated constant-temperature drying box for drying treatment at the drying temperature of 120 ℃ for 6 hours, naturally cooling to the normal temperature, and sealing and packaging to obtain a finished product.
Example 2:
(1) respectively weighing 50 parts of polyether-ether-ketone, 20 parts of polyphenylene sulfide, 10 parts of graphene microchip and 2 parts of zinc powder, fully mixing, and putting the mixture into a powder high-speed dispersing machine for dispersing for 15 minutes to uniformly disperse all the components;
(2) taking out the mixed powder, immediately melting and extruding the powder in an extruder, and shearing the powder into small particles, wherein the extrusion temperature is controlled at 380-400 ℃;
(3) naturally cooling the sheared particles to normal temperature, and then placing the particles at the ultralow temperature of-80 ℃ for freezing, crushing and grinding the particles to fine powder (the particle size of the powder is more than or equal to 700 meshes);
(4) and (3) placing the ground material into a heated constant-temperature drying box for drying treatment at the drying temperature of 120 ℃ for 6 hours, naturally cooling to the normal temperature, and sealing and packaging to obtain a finished product.
Example 3:
(1) respectively weighing 40 parts of polyether-ether-ketone, 20 parts of polyphenylene sulfide, 20 parts of graphene microchip and 1 part of zinc powder, fully mixing, and putting the mixture into a powder high-speed dispersing machine for dispersing for 15 minutes to uniformly disperse all the components;
(2) taking out the mixed powder, immediately melting and extruding the powder in an extruder, and shearing the powder into small particles, wherein the extrusion temperature is controlled at 380-400 ℃;
(3) naturally cooling the sheared particles to normal temperature, and then placing the particles at the ultralow temperature of-80 ℃ for freezing, crushing and grinding the particles to fine powder (the particle size of the powder is more than or equal to 700 meshes);
(4) and (3) placing the ground material into a heated constant-temperature drying box for drying treatment at the drying temperature of 120 ℃ for 6 hours, naturally cooling to the normal temperature, and sealing and packaging to obtain a finished product.
Comparative example 1:
the coating was prepared with pure polyetheretherketone powder coating.
Comparative example 2:
the other conditions were the same as in example 3, except that polyphenylene sulfide was not added.
Comparative example 3:
graphene nanoplatelets were not added, and the other conditions were the same as in example 3.
Comparative example 4:
the other conditions were the same as in example 3, except that no zinc powder was added.
Comparative example 5:
the coating was prepared with a polyester powder coating.
1. The performance of the graphene polyether ether ketone powder coating prepared by the invention is tested.
The substrate is a tinplate (150 × 70 × 0.28 mm), and is subjected to oil removal, sand blasting, acid washing and water washing treatment, and then the tinplate is placed into an oven for drying for later use. The prepared coating is sprayed on the surface of the treated tinplate sheet by adopting an electrostatic spraying method, and is naturally cooled to room temperature after being melted and leveled for 10min at 380 ℃, and the thickness of the coating is controlled to be (30 +/-5) mu m. After standing for 24 hours, the film coating properties were measured.
The results of the performance tests are shown in the following table:
salt spray resistance test
The test was carried out in accordance with GB/T1771 determination of the neutral salt spray resistance of pigmented paint and varnish in example 3, comparative example 1, comparative example 3 and comparative example 5. The test conditions were as follows:
test solutions: (5 ± 1)% aqueous sodium chloride solution;
test temperature: (35. + -. 2) ℃ C;
solution pH (25 ℃ C.): 6.5-7.2;
humidity in the box: 100 percent.
And (3) scribing two crossed lines on the paint film to be completely carved to the substrate, wherein the width of the scribed line is 0.3-1.0 mm. After the salt spray test for a specified time, the width of the paint film on any side of the scratch is observed to be less than or equal to 2.0mm, such as bubbling, falling off, rusting and the like.
From the data in the table, the polyether-ether-ketone powder coating has better corrosion resistance than the traditional polyester powder coating, and the more the graphene microchip is added, the better the corrosion resistance is, and the hardness and the impact resistance of the prepared coating are more excellent.
The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (7)
1. A preparation method of graphene polyether-ether-ketone anticorrosive high-temperature-resistant powder coating is characterized by comprising the following steps:
s1: respectively weighing polyether-ether-ketone, polyphenylene sulfide, graphene nanoplatelets and zinc powder, fully mixing, and putting into a high-speed powder dispersing machine for dispersing for 15 minutes to uniformly disperse each component;
s2: taking out the mixed powder in the step S1, immediately melting and extruding the mixed powder in an extruder, and shearing the powder into small particles, wherein the extrusion temperature is controlled at 380-400 ℃;
s3: naturally cooling the sheared particles to normal temperature, and then placing the particles at the ultralow temperature of-80 ℃ for freezing, crushing and grinding the particles into fine powder;
s4: and (3) placing the ground material into a heated constant-temperature drying box for drying treatment at the drying temperature of 120 ℃ for 6 hours, naturally cooling to the normal temperature, and sealing and packaging to obtain the finished product powder coating.
2. The method for preparing graphene polyetheretherketone anticorrosive high-temperature-resistant powder coating as claimed in claim 1, wherein the polyetheretherketone particle size in step S1 is 100-200 mesh, polyetheretherketone is a base material of the powder coating, and the weight part is 30-60 parts.
3. The preparation method of the graphene polyether ether ketone anticorrosive high-temperature-resistant powder coating as claimed in claim 1, wherein the particle size of the polyphenylene sulfide in the step S1 is 300-500 meshes, and the weight part is 5-10 parts.
4. The preparation method of the graphene polyether ether ketone anticorrosive high-temperature-resistant powder coating as claimed in claim 1, wherein the particle size of the graphene nanoplatelets in the step S1 is 600-750 meshes, and the weight is 2-30 parts.
5. The preparation method of the graphene polyether ether ketone anticorrosive high-temperature-resistant powder coating as claimed in claim 1, wherein the particle size of the zinc powder in the step S1 is 1000-1200 meshes, and the weight is 1-5 parts.
6. The method for preparing graphene polyether ether ketone anticorrosive high-temperature-resistant powder coating as claimed in claim 1, wherein the particle size of the fine powder in step S3 is greater than or equal to 700 meshes.
7. A use method of graphene polyether-ether-ketone anticorrosion high-temperature-resistant powder coating is characterized by comprising the following steps:
a1: carrying out oil removal and sand blasting treatment on the workpiece;
a2: soaking in a pickling tank for rust removal, then soaking in warm water in a rinsing tank, and putting in a constant-temperature oven for heating and drying at 120 ℃;
a3: and (4) spraying the graphene polyether ether ketone powder coating prepared in the step S4 onto the surface of a workpiece by an electrostatic spraying method, and solidifying and forming a film with the thickness of 20-50 microns after melting and leveling at the high temperature of 380 ℃ for 10 min.
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| CN115120781A (en) * | 2022-07-11 | 2022-09-30 | 运怡（北京）医疗器械有限公司 | Medical composite high polymer material and preparation method thereof |
| CN115960524A (en) * | 2022-09-07 | 2023-04-14 | 安徽中嘉环保建材科技有限公司 | Film-coated aluminum template and preparation method thereof |
| CN117817924A (en) * | 2024-03-05 | 2024-04-05 | 安徽紫金新材料科技股份有限公司 | High-temperature-resistant multilayer co-extrusion film, preparation process and application thereof in aerospace |
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| CN117817924A (en) * | 2024-03-05 | 2024-04-05 | 安徽紫金新材料科技股份有限公司 | High-temperature-resistant multilayer co-extrusion film, preparation process and application thereof in aerospace |
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