CN112280437A - Composite graphene anticorrosive paint and preparation method and application thereof - Google Patents
Composite graphene anticorrosive paint and preparation method and application thereof Download PDFInfo
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- CN112280437A CN112280437A CN202011269444.7A CN202011269444A CN112280437A CN 112280437 A CN112280437 A CN 112280437A CN 202011269444 A CN202011269444 A CN 202011269444A CN 112280437 A CN112280437 A CN 112280437A
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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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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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
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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
- C08L2201/08—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
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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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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- 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
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention relates to the field of polymer material science, in particular to a composite graphene anticorrosive paint and a preparation method and application thereof. The preparation raw materials comprise the following components in parts by mass: 1-2 parts of graphene oxide; 60-80 parts of bisphenol A; 13-21 parts of epoxy chloropropane; 25-36 parts of asphalt; 10-28 parts of a styrene-butadiene-styrene block copolymer; 4-8 parts of an anionic surfactant; 15-20 parts of emulsifier and 38-46 parts of chlorosulfonated polyethylene rubber. According to the invention, graphene and epoxy coal asphalt paint are compounded to obtain the composite graphene anticorrosive paint, and the mechanical property of epoxy coal asphalt and the aging resistance of epoxy coal asphalt are improved through the composite graphene anticorrosive paint.
Description
Technical Field
The invention relates to the field of polymer material science, in particular to a composite graphene anticorrosive paint and a preparation method and application thereof.
Background
Epoxy resinCoal tar pitchThe paint is prepared by adding Chinese and foreign recognized long-life chlorosulfonated polyethylene rubber on the basis of the traditional epoxy coal asphalt paint, and modifying the traditional epoxy coal asphalt through the chlorosulfonated polyethylene rubber with excellent corrosion resistance, so that an interpenetrating network structure between an epoxy resin chain and a rubber chain is formed after the traditional epoxy coal asphalt paint is cured, and the paint has the technical advantages of low water absorption, good water resistance, microbial corrosion resistance and good permeation resistance. Then mica iron oxide, other anti-corrosion pigment and filler, special additive and active solvent are continuously added, and the bi-component long-acting heavy-duty anticorrosive coating is prepared by advanced process. Epoxy resinCoal tar pitchThe paint integrates the acid resistance, the alkalinity, the water resistance of the coal tar pitch and the adhesive force, the mechanical strength and the solvent resistance of the epoxy resin, is mainly characterized by thick film, long-acting and being suitable for severe corrosive environment conditions, has good and stable corrosion resistance, particularly resists the corrosion of seawater and river water, and is widely used in the industries of water conservancy, petrochemical industry, shipbuilding, transportation and the like.
In the epoxy coal tar pitch in the prior art, when the mass fraction of the epoxy resin is more than 22% and the mass fraction of the coal tar pitch is more than 36%, the impact strength is small, and the cracks are moderate or dense, so that the raw materials need to be supplemented by fillers, and the more excellent corrosion resistance is realized by adding other corrosion-resistant pigments and fillers; when the mass fraction of the epoxy resin is less than 22% and the mass fraction of the coal tar pitch is less than 36%, the impact strength is not good, and a small amount of cracks are generated, so that the epoxy coal tar pitch in the prior art has excellent corrosion resistance, and the impact strength needs to be improved.
After the crack is generated, the epoxy coal pitch is easy to fall off due to corrosion with the crack as the center, and the corrosion area is gradually enlarged, so that the structural stability of the protected material under the severe corrosion environment condition is influenced.
The 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, and is considered to be a revolutionary material in the future. Graphene is one of the materials with the highest known strength, has good toughness and can be bent, the theoretical Young modulus of the graphene reaches 1.0TPa, and the inherent tensile strength is 130 GPa; the reduced graphene modified by the hydrogen plasma also has very good strength, and the average modulus can be larger than 0.25 TPa.
Disclosure of Invention
Aiming at the technical defects, the invention aims to provide the composite graphene anticorrosive paint and the preparation method and the application thereofCoal tar pitchThe paint is compounded to obtain the composite graphene anticorrosive paint, and the epoxy is improved by the composite graphene anticorrosive paintCoal tar pitchMechanical properties of (2) and improved epoxyCoal tar pitchThe aging resistance of (1).
In order to solve the technical problems, the invention adopts the following technical scheme:
the composite graphene anticorrosive paint comprises the following raw materials in parts by weight: 1-2 parts of graphene oxide; 60-80 parts of bisphenol A; 13-21 parts of epoxy chloropropane;asphalt25-36 parts; 10-28 parts of a styrene-butadiene-styrene block copolymer; 4-8 parts of an anionic surfactant; 15-20 parts of an emulsifier.
Preferably, 38-46 parts of chlorosulfonated polyethylene rubber is also included.
Preferably, the particle size of the asphalt is 100-200 meshes.
Preferably, the anionic surfactant is sodium dodecyl sulfate or sodium dodecyl benzene sulfonate.
Preferably, the emulsifier is one of OP-10 emulsifier, span 80 or Tween 85.
Preferably, the preparation method of the graphene oxide comprises the following steps: mixing graphene with a concentrated acid solution, performing ultrasonic treatment at 50-70 ℃ for 3-4h, then washing with water to be neutral, and drying at 60-80 ℃ until the weight of the graphene does not change any more, so as to obtain graphene oxide;
the concentrated acid solution is selected from a concentrated sulfuric acid solution with the mass fraction of 98% or a concentrated nitric acid solution with the mass fraction of 68%.
The invention also provides a preparation method of the composite graphene anticorrosive paint, which comprises the following steps:
(1) weighing:
weighing the following raw materials in parts by weight: 1-2 parts of graphene oxide; 60-80 parts of bisphenol A; 13-21 parts of epoxy chloropropane;asphalt25-36 parts; 10-28 parts of a styrene-butadiene-styrene block copolymer; 4-8 parts of an anionic surfactant; 15-20 parts of an emulsifier for later use;
(2) preparing graphene modified epoxy resin:
ultrasonically dispersing graphene oxide in an alcohol solvent, adding bisphenol A and epoxy chloropropane, adding an initiator, and reacting at 50-65 ℃ for 18-24h to obtain graphene oxide modified epoxy resin;
the mass ratio of the initiator to the epichlorohydrin is 0.8-1.0: 1;
(3) preparing the composite graphene anticorrosive paint:
and (3) adding an emulsifier into the completely melted asphalt, then cooling to 90-100 ℃, adding a styrene-butadiene-styrene block copolymer, an anionic surfactant and the graphene modified epoxy resin prepared in the step (2), reacting for 7-10h, and cooling to room temperature to obtain the composite graphene anticorrosive paint.
Preferably, the raw materials weighed in the step (1) further comprise 38-46 parts of chlorosulfonated polyethylene rubber, and then the chlorosulfonated polyethylene rubber and the composite graphene anticorrosive paint prepared in the step (3) are uniformly mixed at 90-100 ℃, continuously reacted for 8-12h, and cooled to room temperature.
Preferably, the alcohol solvent of step (2) is ethanol, propanol or butanediol, and the initiator is one or more of benzyltrimethylammonium chloride, tetramethylammonium bromide, tetraethylammonium bromide and hexadecyltrimethylammonium bromide.
The invention also protects the application of the composite graphene anticorrosive paint as an outer wall anticorrosive material of buried or underwater oil, gas, water and heat pipelines.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, graphene is oxidized to obtain graphene oxide, the mechanical property of the oxidized graphene is improved so that the oxidized graphene is firm and tough, a large amount of carboxyl is generated on the surface of the oxidized graphene, the compatibility of the oxidized graphene with bisphenol A and epoxy chloropropane is increased, and the oxidized graphene modified epoxy resin material is prepared after the oxidized graphene reacts with bisphenol A and epoxy chloropropane;
asphalt is widely used in road construction as an adhesive between stones, however, the aging resistance of matrix asphalt is poor, SBS is the most widely used asphalt modifier at present, the mechanical property and rheological behavior of asphalt can be obviously improved by adding SBS, however, the difference between the chemical structure and the relative molecular mass of SBS and asphalt is large, so that the compatibility between SBS and asphalt is poor, and two-phase separation phenomenon is generated at high temperature; in the blending process of the SBS material and the asphalt, the graphene oxide-doped modified epoxy resin material fully exerts the advantage of the anisotropy of the graphene oxide, so that the SBS modified asphalt system forms a stable crossed network structure.
The graphene is a two-dimensional material, can exist in parallel to the surface of aggregate, forms a shielding structure in an asphalt film, can slow down the penetration of substances such as oxygen, moisture and the like, and absorbs ultraviolet rays, so that the performances of asphalt in the aspects of water loss resistance, aging resistance and the like are improved; in addition, the graphene is a nano reinforcing material, so that the elastic modulus of the asphalt can be obviously increased, and the deformation resistance is improved.
2. The modified epoxy coal tar asphalt is preferably characterized by further comprising chlorosulfonated polyethylene rubber, the technical purpose of the modified epoxy coal tar asphalt can be achieved under the condition that the chlorosulfonated polyethylene rubber is not added, and after the modified epoxy coal tar asphalt is blended with the chlorosulfonated polyethylene rubber, the chlorosulfonated polyethylene rubber with excellent corrosion resistance is used for modifying the traditional epoxy coal tar asphalt, so that an interpenetrating network structure between an epoxy resin chain and a rubber chain is formed after the modified epoxy coal tar asphalt is cured, and the corrosion resistance of the modified epoxy coal tar asphalt is improved.
3. The invention relates to graphene and epoxyCoal tar pitchCompounding the paint to obtain the composite graphene anticorrosive paintAnd not only the epoxy is improved through the composite graphene anticorrosive paintCoal tar pitchMechanical properties of (2) and improved epoxyCoal tar pitchThe aging resistance of the epoxy resin composition, and further overcomes the epoxy resin composition in the prior artCoal tar pitchThe paint has poor mechanical property.
Detailed Description
The following description is provided for the best mode of carrying out the invention.
Example 1
A preparation method of the composite graphene anticorrosive paint comprises the following steps:
(1) weighing:
weighing the following raw materials in parts by weight: 1 part of graphene oxide; 60 parts of bisphenol A; 13 parts of epoxy chloropropane;leaching Green leaf of Chinese cabbage36 parts of (A); 28 parts of a styrene-butadiene-styrene block copolymer; 8 parts of an anionic surfactant; 20 parts of an emulsifier for later use;
(2) preparing graphene modified epoxy resin:
ultrasonically dispersing graphene oxide in an ethanol solvent, adding bisphenol A and epoxy chloropropane, adding an initiator benzyltrimethylammonium chloride, and reacting at 50 ℃ for 24 hours to obtain graphene oxide modified epoxy resin;
the mass ratio of the initiator to the epichlorohydrin is 0.8: 1;
(3) preparing the composite graphene anticorrosive paint:
and (3) adding an emulsifier into the completely melted asphalt, then cooling to 90 ℃, adding the styrene-butadiene-styrene block copolymer, the anionic surfactant and the graphene modified epoxy resin prepared in the step (2), reacting for 10 hours, and cooling to room temperature to obtain the composite graphene anticorrosive paint.
Example 2
A preparation method of the composite graphene anticorrosive paint comprises the following steps:
(1) weighing:
weighing the following raw materials in parts by weight: 1.5 parts of graphene oxide; 70 parts of bisphenol A; 18 parts of epoxy chloropropane;asphalt30 parts of (1); 20 parts of styrene-butadiene-styrene block copolymer; 6 parts of an anionic surfactant; 18 parts of an emulsifier for later use;
(2) preparing graphene modified epoxy resin:
ultrasonically dispersing graphene oxide in propanol, adding bisphenol A and epoxy chloropropane, adding an initiator, and reacting at 60 ℃ for 20 hours to obtain graphene oxide modified epoxy resin;
the mass ratio of the initiator to the epichlorohydrin is 0.9: 1;
(3) preparing the composite graphene anticorrosive paint:
and (3) adding an emulsifier into the completely melted asphalt, then cooling to 95 ℃, adding the styrene-butadiene-styrene block copolymer, the anionic surfactant and the graphene modified epoxy resin prepared in the step (2), reacting for 8 hours, and cooling to room temperature to obtain the composite graphene anticorrosive paint.
Example 3
A preparation method of the composite graphene anticorrosive paint comprises the following steps:
(1) weighing:
weighing the following raw materials in parts by weight: 2 parts of graphene oxide; 80 parts of bisphenol A; 21 parts of epoxy chloropropane;leaching Green leaf of Chinese cabbage25 parts of (1); 10 parts of styrene-butadiene-styrene block copolymer; 4 parts of an anionic surfactant; 15 parts of an emulsifier for later use;
(2) preparing graphene modified epoxy resin:
ultrasonically dispersing graphene oxide in butanediol, adding bisphenol A and epoxy chloropropane, adding an initiator, and reacting at 65 ℃ for 18h to obtain graphene oxide modified epoxy resin;
the mass ratio of the initiator to the epichlorohydrin is 1.0: 1;
(3) preparing the composite graphene anticorrosive paint:
and (3) adding an emulsifier into the completely melted asphalt, then cooling to 100 ℃, adding the styrene-butadiene-styrene segmented copolymer, the anionic surfactant and the graphene modified epoxy resin prepared in the step (2), reacting for 7 hours, and cooling to room temperature to obtain the composite graphene anticorrosive paint.
Example 4
A preparation method of the composite graphene anticorrosive paint comprises the following steps:
(1) weighing:
weighing the following raw materials in parts by weight: 1.5 parts of graphene oxide; 70 parts of bisphenol A; 18 parts of epoxy chloropropane;asphalt30 parts of (1); 20 parts of styrene-butadiene-styrene block copolymer; 6 parts of an anionic surfactant; 18 parts of emulsifier and 42 parts of chlorosulfonated polyethylene rubber for later use;
(2) preparing graphene modified epoxy resin:
ultrasonically dispersing graphene oxide in propanol, adding bisphenol A and epoxy chloropropane, adding an initiator, and reacting at 60 ℃ for 20 hours to obtain graphene oxide modified epoxy resin;
the mass ratio of the initiator to the epichlorohydrin is 0.9: 1;
(3) preparing the composite graphene anticorrosive paint:
and (3) adding an emulsifier into the completely melted asphalt, cooling to 95 ℃, adding a styrene-butadiene-styrene block copolymer, an anionic surfactant and the graphene modified epoxy resin prepared in the step (2), reacting for 8 hours, uniformly mixing chlorosulfonated polyethylene rubber and the prepared composite graphene anticorrosive paint at 95 ℃, continuing to react for 12 hours, and cooling to room temperature to obtain the composite graphene anticorrosive paint.
Comparative example 1
Commercially available epoxy coal pitch.
The composite graphene anticorrosive paint with excellent mechanical property and corrosion resistance is prepared in the embodiments 1 to 4 of the invention, the effects of the embodiments 1 to 3 are parallel, and the corrosion resistance and mechanical property of the embodiments 2, 4 and 1 are studied, wherein the specific research method comprises the following steps:
before the composite graphene anticorrosive paint prepared by the application and the epoxy coal pitch prepared by the comparative example 1 are coated and applied, the composite graphene anticorrosive paint and the epoxy coal pitch are respectively mixed with a curing agent, the using amount ratio of the curing agent to the epoxy coal pitch is a conventional using amount ratio, the amount of the curing agent blended with the composite graphene anticorrosive paint is the same as the amount blended with the epoxy coal pitch, and coating operation is carried out after mixing.
(1) Study on Corrosion resistance
Coating the paint on a stainless steel sheet, wherein the size of the stainless steel sheet is the standard size of a corrosion resistance experiment and is
25×50mm2The surface finish was 5. The experimental conditions are 3, namely salt water resistance (10 percent of salt water by mass), acid water resistance (20 percent of sulfuric acid solution by volume) and alkali water resistance (10 percent of sodium hydroxide solution by mass), the samples of the examples 2, 4 and 1 are subjected to casting film formation, then are dried at normal temperature, and the completely dried samples are respectively soaked in the salt water resistance, the acid water resistance and the alkali water resistance. The results of the corrosion resistance test are shown in table 1:
TABLE 1 Corrosion resistance test results
"/" indicates no blistering, no rusting, no flaking;
after the samples of the examples 2 and 4 are soaked for 24 months, the samples are intact as before, have no discoloration and light loss, achieve good corrosion resistance grade, have no obvious change on the surface of a paint film, have no bubbles, have no rust and paint film falling, and have no bubbling, rust and falling after the materials of the examples 2 and 4 are soaked for 36 months; compared with the comparative example 1, the stability in acid water, alkaline water and brine is higher, the corrosion resistance is better, and the addition of the graphene effectively improves the corrosion resistance of the epoxy coal pitch.
(2) Axial bond tensile test of materials
The experimental method comprises the following steps: the area is 40 multiplied by 40mm2The middle coatings of the two steel plates are bonded for experiments;the surface of the steel plate of the coating layer is smooth and smooth
The experimental conditions are 4, namely salt water resistance (10% of salt water in mass fraction), acid water resistance (20% of sulfuric acid solution in volume fraction) and alkali water resistance (10% of sodium hydroxide solution in mass fraction); the axial bond tensile results for the materials are shown in table 2:
TABLE 2 axial bond tensile test results for materials
As shown in table 2, compared with comparative example 1, the axial bonding tensile strength of examples 2 and 4 is significantly improved, which indicates that the addition of graphene effectively improves the axial bonding tensile strength of epoxy coal pitch, thereby effectively avoiding the paint film falling phenomenon, and the axial bonding tensile strength of examples 4 and 2 is similar, which indicates that the blending with chlorosulfonated polyethylene rubber has little effect on the axial bonding tensile strength.
(3) Impermeability test and impact strength test
The method comprises the following steps: and (3) forming a mortar anti-permeability test piece by using low-grade cement mortar, curing for 28 days, drying for one month, coating the surface of the mortar anti-permeability test piece with paint, and measuring the anti-permeability grade of the paint on the back surface and the water-facing surface.
The impermeability experiment of the coating is carried out by adopting a mortar permeameter; the preparation principle of the mortar impervious test piece is that the mortar test piece with good water permeability is formed, and the mixing ratio is cement: sand: water 1: 5: 0.85. 3 samples in total, and the coatings of the example 2, the example 4 and the comparative example 1 are respectively coated on the 3 samples; and after curing for 28 days in a curing room, drying for 1 month, and respectively coating the back surface and the upstream surface on each group of mortar anti-permeability test pieces. And (3) after the coating is dried for 45 days, carrying out an anti-permeability test, starting from 0.1MPa, keeping for 2 hours, increasing the water pressure to 0.2MPa, increasing the water pressure to 0.1MPa every 1 hour, stopping the test when 1 anti-permeability sample has water seepage, and recording the water pressure at the moment.
Impermeability of the test piece:
s ═ P-1(MPa), the results are shown in table 3:
TABLE 3 study of impermeability
The impact strength of 3 specimens was investigated and the results are shown in Table 4:
TABLE 4 results of the impact Strength study
The research results of the impermeability and the impact strength show that the materials prepared in the embodiments 2 and 4 of the invention have excellent mechanical properties, which shows that the addition of the graphene effectively overcomes the technical defect of poor impact strength in the prior art, the impermeability is effectively improved, and the mechanical properties are obviously superior to those of the epoxy coal pitch in the prior art.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The composite graphene anticorrosive paint is characterized by comprising the following preparation raw materials in parts by mass: 1-2 parts of graphene oxide; 60-80 parts of bisphenol A; 13-21 parts of epoxy chloropropane;asphalt25-36 parts; 10-28 parts of a styrene-butadiene-styrene block copolymer; 4-8 parts of an anionic surfactant; 15-20 parts of an emulsifier.
2. The composite graphene anticorrosive paint according to claim 1, further comprising 38-46 parts of chlorosulfonated polyethylene rubber.
3. The composite graphene anticorrosive paint as claimed in claim 1, wherein the particle size of the asphalt is 100-200 meshes.
4. The composite graphene anticorrosive paint according to claim 1, wherein the anionic surfactant is sodium dodecyl sulfate or sodium dodecyl benzene sulfonate.
5. The composite graphene anticorrosive paint according to claim 1, wherein the emulsifier is one of OP-10 emulsifier, span 80 or Tween 85.
6. The composite graphene anticorrosive paint according to claim 1, wherein the preparation method of the graphene oxide comprises the following steps: mixing graphene with a concentrated acid solution, performing ultrasonic treatment at 50-70 ℃ for 3-4h, then washing with water to be neutral, and drying at 60-80 ℃ until the weight of the graphene does not change any more, so as to obtain graphene oxide;
the concentrated acid solution is selected from a concentrated sulfuric acid solution with the mass fraction of 98% or a concentrated nitric acid solution with the mass fraction of 68%.
7. The preparation method of the composite graphene anticorrosive paint according to claim 6, characterized by comprising the following steps:
(1) weighing:
weighing the following raw materials in parts by weight: 1-2 parts of graphene oxide; 60-80 parts of bisphenol A; 13-21 parts of epoxy chloropropane;asphalt25-36 parts; 10-28 parts of a styrene-butadiene-styrene block copolymer; 4-8 parts of an anionic surfactant; 15-20 parts of an emulsifier for later use;
(2) preparing graphene modified epoxy resin:
ultrasonically dispersing graphene oxide in an alcohol solvent, adding bisphenol A and epoxy chloropropane, adding an initiator, and reacting at 50-65 ℃ for 18-24h to obtain graphene oxide modified epoxy resin;
the mass ratio of the initiator to the epichlorohydrin is 0.8-1.0: 1;
(3) preparing the composite graphene anticorrosive paint:
and (3) adding an emulsifier into the completely melted asphalt, then cooling to 90-100 ℃, adding a styrene-butadiene-styrene block copolymer, an anionic surfactant and the graphene modified epoxy resin prepared in the step (2), reacting for 7-10h, and cooling to room temperature to obtain the composite graphene anticorrosive paint.
8. The preparation method of the composite graphene anticorrosive paint according to claim 7, wherein the raw materials weighed in the step (1) further comprise 38-46 parts of chlorosulfonated polyethylene rubber, and then the chlorosulfonated polyethylene rubber and the composite graphene anticorrosive paint prepared in the step (3) are uniformly mixed at 90-100 ℃, continuously reacted for 8-12 hours, and cooled to room temperature.
9. The preparation method of the composite graphene anticorrosive paint according to claim 7, wherein the alcohol solvent in the step (2) is ethanol, propanol or butanediol, and the initiator is one or more of benzyltrimethylammonium chloride, tetramethylammonium bromide, tetraethylammonium bromide and hexadecyltrimethylammonium bromide.
10. The composite graphene anticorrosive paint according to claim 1 is applied to an outer wall anticorrosive material of buried or underwater oil, gas, water and thermal pipelines.
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| CN202011269444.7A CN112280437A (en) | 2020-11-13 | 2020-11-13 | Composite graphene anticorrosive paint and preparation method and application thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115746649A (en) * | 2022-10-27 | 2023-03-07 | 武汉纺织大学 | Anticorrosive paint for metal and preparation and application thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115746649A (en) * | 2022-10-27 | 2023-03-07 | 武汉纺织大学 | Anticorrosive paint for metal and preparation and application thereof |
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