CN109679553B - Graphene epoxy waterproof anticorrosion encapsulation slurry and preparation method thereof - Google Patents
Graphene epoxy waterproof anticorrosion encapsulation slurry and preparation method thereof Download PDFInfo
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- CN109679553B CN109679553B CN201811590424.2A CN201811590424A CN109679553B CN 109679553 B CN109679553 B CN 109679553B CN 201811590424 A CN201811590424 A CN 201811590424A CN 109679553 B CN109679553 B CN 109679553B
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J163/00—Adhesives based on epoxy resins; Adhesives 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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- Inorganic Chemistry (AREA)
- Sealing Material Composition (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a graphene flexible epoxy waterproof anticorrosion potting slurry which comprises a component A and a component B, wherein graphene anticorrosion materials are added, and graphene is uniformly dispersed in epoxy resin in a form of dispersion liquid or a form of mixing with glass beads, so that a concrete potting slurry with excellent waterproof anticorrosion effect and flexibility is obtained, cracking in the using process is reduced, and the functional service life of concrete is prolonged.
Description
Technical Field
The invention belongs to the field of concrete protective materials, and particularly relates to waterproof and anticorrosive encapsulating slurry.
Background
The concrete is prepared by mixing cement as a cementing material, sand, stones, water, a blending material, an additive and the like according to a certain proportion. After solidification, the material is hard like stone, has good compression capacity, but has poor tension capacity and is easy to break due to tension. In order to solve the contradiction and fully exert the compression capacity of the concrete, a certain amount of steel bars are usually added in the tension area or corresponding parts of the concrete, so that the two materials are bonded into a whole and bear the external force together. Such reinforced concrete is called reinforced concrete.
The concrete structure is loose and porous due to sunlight irradiation, wind, sand, rain and natural aging, corrosive media can gradually permeate into concrete to cause corrosion of internal steel bars, and the corrosion of the steel bars further causes insufficient durability of the concrete and premature failure and damage, thereby bringing serious potential safety hazard and economic loss. How to improve the durability of the reinforced concrete and prolong the service life of the reinforced concrete is a problem which is generally concerned by civil engineering and corrosion protection workers. Studies have shown that sufficient moisture participation is a prerequisite for premature durability deterioration of the concrete, and that water repellent treatment of reinforced concrete is an effective means of improving the durability of concrete. Therefore, the reinforced concrete protective coating which is simple and effective and can be coated with rust is developed, the permeation rate of water and other corrosive mediums diffusing into the concrete is reduced, and the reinforced concrete protective coating has important significance for prolonging the service life of reinforced concrete.
The potting slurry is injected into the cracks by using hydraulic pressure and air pressure, so that the leakage channel is blocked after the material is solidified. Epoxy potting paste acts as a structural adhesive to repair cracked and damaged concrete. It can be used as structural epoxy resin repairing agent for permanently adhering concrete and steel, and has a long history of use. It is used to seal cavities and cracks in structural components such as columns, beams, foundations, decks and watertight buildings. The concrete barrier not only forms a powerful barrier capable of effectively preventing water from permeating, but also can strongly adhere each part of the concrete, so that the original concrete structure strength is recovered, and the service life of the project is prolonged.
In practice, some cracks are not only wet but also may have a corrosive effect on the concrete. The conventional epoxy resin curing glue has high brittleness, the bonding performance is gradually reduced in long-term use, and the phenomenon of water leakage again is caused, and the conventional epoxy resin curing glue does not have an anti-corrosion function.
On the other hand, due to the dispersion problem of graphene, the application of graphene in anticorrosive materials is hindered, and the graphene is difficult to be effectively dispersed, and the graphene is difficult to form a compact continuous protective film, so that the anticorrosive performance of the graphene is affected. However, the exfoliated graphene is easy to agglomerate together due to strong interaction of sheets, so that the solubility in organic solvents or water is limited, which greatly limits the application. How to realize efficient and stable dispersion of graphene in a dispersion medium on the basis of not damaging the unique physical and chemical properties of graphene is a difficult problem to be solved urgently in the industry.
Disclosure of Invention
The invention aims to provide graphene flexible epoxy waterproof anticorrosion potting slurry, and the concrete potting slurry with excellent waterproof anticorrosion effect and flexibility is obtained, so that cracking in the using process is reduced, and the functional service life of concrete is prolonged.
The graphene epoxy waterproof anticorrosion potting slurry comprises a component A and a component B, wherein the component A comprises the following components in parts by mass,
40-70 parts of one or more of E-44, E-51 and E-54,
NC-513, butyl glycidyl ether, benzyl glycidyl ether, C of Kadela corporation12-C145-40 parts of one or more alcohol glycidyl ethers,
15-35 parts of one or more of neopentyl glycol glycidyl ether, hexanediol glycidyl ether and diethylene glycol glycidyl ether;
1-20 parts of a graphene anticorrosive material;
the group B consists of a curing agent and an adhesion promoter.
Further, the component B comprises the following components in parts by mass:
30-60 parts of one or more of NC-540, NC-558, LITE 2002 and NX-2003D of Kadela corporation,
NX-519840-70 parts by weight of Kadeli corporation,
2-5 parts of K54 accelerant,
0.5-3 parts of adhesion promoter.
Further, the adhesive is one or more of BYK-4511, BYK-4513 and BicHex chemical 1121 produced by BicHex chemical company of Germany.
Furthermore, the A, B components of the potting slurry are used and mixed in a mass ratio of 1 (1-1.5).
Further, the graphene anticorrosive material is a graphene dispersion liquid.
Further, the graphene dispersion liquid is a graphene isopropanol dispersion liquid. Preferably, the dispersion liquid is formed by adding a reducing agent and a dispersing agent to the graphene oxide dispersion liquid. Furthermore, the graphene dispersion liquid has the solid content of 10-15%, the thickness of 0.5-3.0 nm, the diameter of the microchip of about 0.5-3 mu m and the number of layers of 1-3, and is the graphene dispersion liquid with uniform and stable dispersion.
Further, the graphene anticorrosive material is a mixture of graphene nanopowder and microporous glass beads.
Preferably, the mixing ratio of the graphene to the microporous glass beads is 1: (1-2).
Preferably, the diameter of the microporous glass bead is 10-100um, and a plurality of blind holes are distributed on the surface of the microporous glass bead.
Graphene is in a form of dispersion liquid or mixing with glass beads, and the graphene is favorably and uniformly mixed with other components, so that the corrosion resistance of the graphene is better exerted, the flexibility of the material is improved, the adhesion and the flexibility are kept in the long-term use process, the cracking of a brittle section is avoided, and the plugging and corrosion prevention effects are picked up.
The preparation method of the graphene flexible epoxy waterproof anticorrosion potting slurry provided by the invention comprises the following steps:
according to the formula of the component A, sequentially adding various epoxy resins and liquid graphene into a reaction kettle, and uniformly stirring to obtain the component A; and (3) according to the formula of the component B, sequentially adding various curing agents and adhesion promoters into the reaction kettle, and uniformly stirring to obtain the component B.
When the potting slurry provided by the invention is used, A, B components are uniformly mixed and stirred according to the mass ratio of 1 (1-1.5), and then are cured for 20 minutes, so that construction can be carried out.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention provides a novel concrete potting slurry with excellent waterproof performance and corrosion resistance, which can more effectively prevent water and corrosion under the conditions that the environment of cracks is humid and the concrete is possibly corroded in the environment.
2. According to the potting slurry provided by the invention, through specific selection and matching combination of components such as epoxy resin, an accelerant and the like, the obtained product has good compressive strength, tensile shear strength and tensile strength, and good bonding strength, the bonding property and flexibility are kept in the long-term use process, cracking of a brittle section is avoided, and the plugging and corrosion prevention effects are picked up.
3. The encapsulating slurry provided by the invention is simple in composition and easy to prepare, the components are all the existing commercial products, the acquisition is easy, and the cost is low.
4. According to the method, the graphene is prepared into the graphene dispersion liquid or is mixed with the glass beads, so that the graphene is uniformly mixed with other components, the problem that the graphene is easy to agglomerate is solved, the corrosion resistance of the graphene is better exerted, the flexibility of the material is improved, the adhesion and the flexibility are kept in a long-term use process, cracking of brittle sections is avoided, and the plugging and corrosion prevention effects are picked up.
Detailed Description
The potting paste of the present invention is further described below by way of specific embodiments. The following are merely examples of the present invention and do not limit the scope of the invention.
In the following examples, the graphene dispersion was prepared by the following method:
(1) dispersing graphene oxide prepared by a Hummers method into isopropanol, stirring, performing ultrasonic treatment, and performing centrifugal separation to obtain a graphene oxide dispersion liquid;
(2) adding the graphene oxide dispersion liquid into a high-pressure spraying tank, spraying the graphene oxide dispersion liquid into a liquid nitrogen container under pressure, and carrying out quick-freezing treatment at the temperature of minus 80 ℃ to obtain a quick-frozen product of the graphene oxide dispersion liquid;
(3) adding the quick-frozen product of the graphene oxide dispersion liquid into a reaction kettle filled with isopropanol, and naturally heating the system to room temperature;
(4) adding acetic acid as acidity regulator into the system at room temperature to regulate pH to 4.00-11.00;
(5) adding a reducing agent ascorbic acid into the system, wherein the mass ratio of the graphene oxide to the reducing agent is 1: 2-5: 1, heating to 60-70 ℃, reacting for 8-14 hours, and performing solid-liquid separation to obtain a solid material;
(6) and adding the solid material into isopropanol as a solvent C, washing by using an ultrasonic cleaning machine, and separating by using a centrifugal machine to obtain the graphene dispersion liquid.
Example 1
The graphene epoxy waterproof and anticorrosive potting slurry comprises a component A and a component B, wherein the use and matching mass ratio of the A, B components is 1:1.
The component A consists of the following components in parts by mass,
the graphene dispersion liquid has the solid content of 10%, the thickness of 0.5-3.0 nm, the diameter of a microchip of about 0.5-3 mu m and 1-3 layers, and is the graphene dispersion liquid with uniform and stable dispersion.
The component B comprises the following components in parts by mass:
example 2
The graphene epoxy waterproof and anticorrosive potting slurry comprises a component A and a component B, wherein the use and matching mass ratio of the A, B components is 1: 1.5.
The component A consists of the following components in parts by mass,
the graphene dispersion liquid is graphene isopropanol dispersion liquid. Preferably, the dispersion liquid is formed by adding a reducing agent and a dispersing agent to the graphene oxide dispersion liquid. Furthermore, the graphene dispersion liquid has a solid content of 12%, a thickness of 0.5-3.0 nm, a diameter of the microchip of about 0.5-3 μm, and 1-3 layers, and is the graphene dispersion liquid with uniform and stable dispersion.
The component B comprises the following components in parts by mass:
example 3
The graphene epoxy waterproof and anticorrosive potting slurry comprises a component A and a component B, wherein the use and matching mass ratio of the A, B components is 1:1.
The component A consists of the following components in parts by mass,
the graphene dispersion liquid is graphene isopropanol dispersion liquid. Preferably, the dispersion liquid is formed by adding a reducing agent and a dispersing agent to the graphene oxide dispersion liquid. Furthermore, the graphene dispersion liquid has the solid content of 15%, the thickness of 0.5-3.0 nm, the diameter of the microchip of about 0.5-3 mu m and the number of layers of 1-3, and is the graphene dispersion liquid with uniform and stable dispersion.
The component B comprises the following components in parts by mass:
example 4
The graphene epoxy waterproof and anticorrosive potting slurry comprises a component A and a component B, wherein the use and matching mass ratio of the A, B components is 1: 1.5.
The component A consists of the following components in parts by mass,
the mass ratio of graphene to microporous glass beads is 1:1 mixing the resulting mixture 20 parts
Preferably, the diameter of the microporous glass bead is 10-100um, and a plurality of blind holes are distributed on the surface of the microporous glass bead.
The graphene is in a form of dispersion liquid or mixing with glass beads, so that the graphene is favorably and uniformly mixed with other components, and the corrosion resistance of the graphene is better exerted.
The component B comprises the following components in parts by mass:
example 5
The graphene epoxy waterproof and anticorrosive potting slurry comprises a component A and a component B, wherein the use and matching mass ratio of the A, B components is 1: 1.5.
The component A consists of the following components in parts by mass,
the mass ratio of graphene to microporous glass beads is 1:1 mixing the resulting mixture in 20 parts,
preferably, the diameter of the microporous glass bead is 10-100um, and a plurality of blind holes are distributed on the surface of the microporous glass bead.
The graphene is in a form of dispersion liquid or mixing with glass beads, so that the graphene is favorably and uniformly mixed with other components, and the corrosion resistance of the graphene is better exerted.
The component B comprises the following components in parts by mass:
example 6
The graphene epoxy waterproof and anticorrosive potting slurry comprises a component A and a component B, wherein the use and matching mass ratio of the A, B components is 1: 1.5.
The component A consists of the following components in parts by mass,
the mass ratio of graphene to microporous glass beads is 1:1 mixing the resulting mixture 11 parts
Preferably, the diameter of the microporous glass bead is 10-100um, and a plurality of blind holes are distributed on the surface of the microporous glass bead.
The graphene is in a form of dispersion liquid or mixing with glass beads, so that the graphene is favorably and uniformly mixed with other components, and the corrosion resistance of the graphene is better exerted.
The component B comprises the following components in parts by mass:
example 7
The graphene epoxy waterproof and anticorrosive potting slurry comprises a component A and a component B, wherein the use and matching mass ratio of the A, B components is 1: 1.5.
The component A consists of the following components in parts by mass,
the mass ratio of graphene to microporous glass beads is 1:1 mixing the resulting mixture 20 parts
Preferably, the diameter of the microporous glass bead is 10-100um, and a plurality of blind holes are distributed on the surface of the microporous glass bead.
The graphene is in a form of dispersion liquid or mixing with glass beads, so that the graphene is favorably and uniformly mixed with other components, and the corrosion resistance of the graphene is better exerted.
The component B comprises the following components in parts by mass:
the grouting seal stock of the formulation described in the above examples was prepared by the following method:
according to the formula of the component A, sequentially adding various epoxy resins and liquid graphene into a reaction kettle, and uniformly stirring to obtain the component A; and (3) according to the formula of the component B, sequentially adding various curing agents and adhesion promoters into the reaction kettle, and uniformly stirring to obtain the component B.
When the potting slurry provided by the invention is used, A, B components are uniformly mixed and stirred according to the mass ratio of 1 (1-1.5), and then are cured for 20 minutes, so that construction can be carried out (the construction standard is JC/T1041-.
The using effect of the product is tested in the test age of 28 days for measuring the performance of the cured object, and the parameters of the product during construction and the performance of the cured object after 28 days are as follows.
Test data for the product prepared in example 1:
parameters of the product during construction:
mechanical properties of the consolidated body:
test data for the product prepared in example 2:
mechanical properties of the consolidated body:
test data for the product prepared in example 3:
parameters of the product during construction:
mechanical properties of the consolidated body:
therefore, the encapsulation slurry provided by the invention has the advantages that through specific selection and matching combination of the components such as the epoxy resin, the accelerant and the like, the obtained product has better compressive strength, tensile shear strength and tensile strength, and simultaneously has better bonding strength, the bonding property and flexibility are kept in the long-term use process, the cracking of the brittle section is avoided, and the picking, plugging and corrosion prevention effects are achieved. The method provided by the invention combines the mode of preparing graphene into graphene dispersion liquid or mixing graphene with glass beads, and is beneficial to fully and uniformly mixing graphene with other components, and the problem that graphene is easy to agglomerate is solved, so that the corrosion resistance of graphene is better exerted, the flexibility of the material is improved, the adhesion and flexibility are kept in a long-term use process, cracking of brittle sections is avoided, and the plugging and corrosion prevention effects are picked up.
Claims (3)
1. The graphene epoxy waterproof anticorrosion potting slurry comprises a component A and a component B, wherein the component A comprises the following components in parts by mass,
40-70 parts of one or more of E-44, E-51 and E-54,
NC-513, butyl glycidyl ether, benzyl glycidyl ether, C of Kadela corporation12-C145-40 parts of one or more alcohol glycidyl ethers,
15-35 parts of one or more of neopentyl glycol glycidyl ether, hexanediol glycidyl ether and diethylene glycol glycidyl ether;
1-20 parts of a graphene anticorrosive material;
the graphene anticorrosive material is graphene isopropanol dispersion liquid, the dispersion liquid is formed by adding a reducing agent and a dispersing agent into graphene oxide dispersion liquid, the solid content of the graphene dispersion liquid is 10-15%, the thickness of the graphene dispersion liquid is 0.5-3.0 nm, the diameter of each microchip is 0.5-3 mu m, and the number of layers is 1-3;
or the graphene anticorrosive material is a mixture of graphene nanopowder and microporous glass beads, and the mass mixing ratio of the graphene to the microporous glass beads is 1: (1-2), the diameter of the microporous glass bead is 10-100um, and a plurality of blind holes are distributed on the surface of the microporous glass bead;
the component B comprises the following components in parts by mass:
30-60 parts of one or more of NC-540, NC-558, LITE 2002 and NX-2003D of Kadela corporation,
NX-519840-70 parts by weight of Kadeli corporation,
2-5 parts of K54 accelerant,
0.5-3 parts of adhesion promoter;
the use and mixing mass ratio of the A, B components of the potting slurry is 1 (1-1.5).
2. The potting paste of claim 1, wherein the adhesive is one or more of BYK-4511, BYK-4513 and bick 1121 manufactured by bick chemical company, germany.
3. The preparation method of the potting slurry of claim 1 or 2, characterized in that according to the formula of the component A, various epoxy resins and graphene anticorrosive materials are sequentially added into a reaction kettle and uniformly stirred to obtain the component A; according to the formula of the component B, various curing agents, K54 accelerant and adhesion promoter are sequentially added into the reaction kettle and stirred uniformly to obtain the component B, and when the component B is used, the A, B components are uniformly mixed and stirred according to the mass ratio of 1 (1-1.5) and then are cured for 20 minutes, so that construction can be carried out.
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| CN112745789B (en) * | 2020-12-23 | 2023-05-05 | 盛势达(广州)化工有限公司 | Epoxy adhesive with low resin precipitation and preparation method thereof |
| CN115382424A (en) * | 2022-03-01 | 2022-11-25 | 江苏江南烯元石墨烯科技有限公司 | Preparation equipment of special high-performance graphene organic nano anticorrosive paint |
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| CN1703381A (en) * | 2002-10-02 | 2005-11-30 | 郭尚运 | Non-shrink high viscosity chemical grout |
| CN101619201A (en) * | 2009-07-16 | 2010-01-06 | 青岛红树林投资有限公司 | Underwater epoxy adhesive and preparation method thereof |
| CN101624271A (en) * | 2009-07-16 | 2010-01-13 | 青岛红树林投资有限公司 | Underwater epoxy concrete, mortar additive and preparation method thereof |
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