阅读说明：本技术 一种水性防静电环氧地坪漆及其制备方法 (Waterborne antistatic epoxy floor paint and preparation method thereof ) 是由 李立军 于 2021-07-28 设计创作，主要内容包括：本发明公开了一种水性防静电环氧地坪漆及其制备方法。所述环氧地坪漆包括A组分浆料和B组分浆料；所述A组分浆料的原材料包括以下成分：按重量计,双酚A型环氧树脂82～90份、活性稀释剂12～20份；所述B组分浆料的原材料包括以下成分：按重量计,水性环氧固化剂50～62份、复合导电材料8～12份、0.1～2份消泡剂、0.05～2份流平剂。优异效果：(1)有效的平衡乳化和固化速率,得到乳化固化双功能的水性环氧固化剂；(2)利用复合导电材料的三维结构,增加液体树脂的流动和渗透；增加复合导电材料的分散性；构建有效的导电网络,排除静电电荷,增加防静电性；辅助水性环氧固化剂解决应力集中的问题；增加页面相互作用,提高力学性能。(The invention discloses a water-based antistatic epoxy floor paint and a preparation method thereof. The epoxy floor paint comprises a component A slurry and a component B slurry; the raw materials of the component A slurry comprise the following components: 82-90 parts of bisphenol A type epoxy resin and 12-20 parts of reactive diluent by weight; the raw materials of the component B slurry comprise the following components: 50-62 parts of water-based epoxy curing agent, 8-12 parts of composite conductive material, 0.1-2 parts of defoaming agent and 0.05-2 parts of flatting agent. The excellent effects are as follows: (1) effectively balancing the emulsification and curing rates to obtain the emulsification and curing dual-functional water-based epoxy curing agent; (2) the three-dimensional structure of the composite conductive material is utilized to increase the flow and permeation of the liquid resin; the dispersibility of the composite conductive material is improved; an effective conductive network is constructed, electrostatic charges are eliminated, and the antistatic property is improved; the auxiliary aqueous epoxy curing agent solves the problem of stress concentration; the interaction of the pages is increased, and the mechanical property is improved.)

1. The utility model provides a waterborne prevents static epoxy terrace paint which characterized in that: the epoxy floor paint comprises a component A slurry and a component B slurry; the raw materials of the component A slurry comprise the following components: 82-90 parts of bisphenol A type epoxy resin and 12-20 parts of reactive diluent by weight; the raw materials of the component B slurry comprise the following components: 50-62 parts of water-based epoxy curing agent, 8-12 parts of composite conductive material, 0.1-2 parts of defoaming agent and 0.05-2 parts of flatting agent.

2. The waterborne antistatic epoxy floor paint according to claim 1, characterized in that: the raw materials of the composite conductive material comprise the following components: 8-12 parts of graphene oxide aerogel, 16-24 parts of 3-aminopropyltriethoxysilane and 40-60 parts of silicon dioxide nanoparticles by weight.

3. The waterborne antistatic epoxy floor paint according to claim 1, characterized in that: the raw materials of the water-based epoxy curing agent comprise the following components: by weight, 80-95 parts of bisphenol A type epoxy resin, 10-15 parts of triethylene tetramine and 4-8 parts of glycidyl carboxylate.

4. The waterborne antistatic epoxy floor paint according to claim 3, characterized in that: the epoxy group equivalent of the glycidyl carboxylate is 240 g/mol.

5. The waterborne antistatic epoxy floor paint according to claim 1, characterized in that: the mixing ratio of the component A slurry to the component B slurry is (1: 0.8) - (1: 1).

6. The preparation method of the waterborne antistatic epoxy floor paint is characterized by comprising the following steps of: the method comprises the following steps:

s1: preparing a composite conductive material;

s2: preparing a water-based epoxy curing agent;

s3: and (3) preparation of epoxy floor paint.

7. The preparation method of the water-based antistatic epoxy floor paint according to claim 6, characterized in that: the method comprises the following steps:

s1: preparing a composite conductive material: (1) modifying the surface of the silicon dioxide nano particles by using 3-aminopropyltriethoxysilane to obtain aminated silicon dioxide for later use; (2) modifying the surface of the graphene oxide aerogel by using aminated silicon dioxide to obtain a composite conductive material for later use;

s2: preparation of the waterborne epoxy curing agent: reacting triethylene tetramine with bisphenol A epoxy resin solution in a mixed solvent of 2-butoxyethanol and n-butyl alcohol, and performing neutralization reaction by using acetic acid to obtain a water-based epoxy curing agent for later use;

s3: preparing epoxy floor paint: (1) mixing and dispersing the weighed bisphenol A epoxy resin and the active diluent in deionized water, and homogenizing to obtain component A slurry; (2) dispersing the weighed waterborne epoxy curing agent, the composite conductive material, the defoaming agent and the flatting agent in deionized water in sequence, and carrying out homogenization treatment; obtaining component B slurry; (3) and uniformly mixing the slurry of the component A and the slurry of the component B to obtain the epoxy floor paint.

8. The preparation method of the water-based antistatic epoxy floor paint according to claim 7, characterized in that: in step S1, the specific steps are: (1) stirring and dispersing the weighed 3-aminopropyltriethoxysilane in absolute ethanol, setting the stirring speed to be 300-400 rmp, and stirring for 40-60 minutes; adding ammonia water solution to adjust the pH value to 10; adding silicon dioxide nanoparticles, reacting for 1-2 hours, centrifugally washing, filtering, and drying at 50-55 ℃ to obtain aminated silicon dioxide for later use; (2) ultrasonically dispersing graphene oxide aerogel in deionized water, adding aminated silicon dioxide, and stirring at 500-600 rmp; adding ammonia water, setting the reaction temperature to be 90-95 ℃, reacting for 5-6 hours, filtering, washing, and freeze-drying at-30 to-50 ℃ to obtain the composite conductive material for later use.

9. The preparation method of the water-based antistatic epoxy floor paint according to claim 7, characterized in that: in step S2, the specific steps are: dissolving the weighed triethylene tetramine in a mixed solvent of 2-butoxyethanol and n-butanol; dripping 50 wt% of bisphenol A epoxy resin solution, and setting the reaction temperature to be 65-68 ℃ for reaction for 4-4.5 hours; adding glycidyl carboxylate into the reaction liquid, setting the reaction temperature to be 70-75 ℃, continuously preserving the heat for 3 hours, and detecting the epoxy conversion rate at intervals of 30 minutes; and after the reaction is finished, carrying out reduced pressure distillation, adding acetic acid for neutralization reaction, filtering, washing and drying to obtain the water-based epoxy curing agent for later use.

10. The preparation method of the water-based antistatic epoxy floor paint according to claim 7, characterized in that: in step S3, the solid content of the slurry of component A is 60 wt%; the solid content of the component B slurry was 55 wt%.

Technical Field

The invention relates to the technical field of epoxy floor, in particular to a water-based antistatic epoxy floor paint and a preparation method thereof.

Background

The bisphenol A epoxy resin disclosed by the invention is a thermosetting resin with excellent corrosion resistance and environmental friendliness, and therefore, the bisphenol A epoxy resin is widely applied to epoxy floor paint and organic anticorrosive paint. The traditional epoxy floor paint consists of two components A and B, wherein a curing agent is usually a single component and is mixed with bisphenol A epoxy resin for curing before use. The water solubility of the materials within the two components, and the compatibility between the two components, have been the focus of intense research. Especially the water solubility of bisphenol A epoxy resins and compatibility with curing agents. Therefore, the preparation of a curing agent having an emulsifying function of a bisphenol A epoxy resin is one of means for solving the problems. But the emulsification rate is less than the curing rate, so that the emulsification is not uniform, the curing is insufficient, the mechanical property is reduced, and the service life is shortened.

In addition, as the market demand increases the functional requirements of the epoxy floor paint, the antistatic function is one of the functions. Generally, the antistatic property of the epoxy floor paint is increased by adding conductive filler, but the conductive filler is compatible with a polymer and has a difference, so that the mechanical property of the epoxy floor paint is reduced, the dispersibility of the conductive filler is poor, and an effective conductive channel cannot be formed on the surface and inside of the epoxy floor paint to increase the antistatic property.

Therefore, to solve the above problems, it is an urgent need to prepare an aqueous antistatic epoxy floor paint with excellent mechanical properties.

Disclosure of Invention

The invention aims to provide a water-based antistatic epoxy floor paint and a preparation method thereof, so as to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme:

the waterborne antistatic epoxy floor paint comprises a component A slurry and a component B slurry; the raw materials of the component A slurry comprise the following components: 82-90 parts of bisphenol A type epoxy resin and 12-20 parts of reactive diluent by weight; the raw materials of the component B slurry comprise the following components: 50-62 parts of water-based epoxy curing agent, 8-12 parts of composite conductive material, 0.1-2 parts of defoaming agent and 0.05-2 parts of flatting agent.

Preferably, the raw materials of the composite conductive material comprise the following components: 8-12 parts of graphene oxide aerogel, 16-24 parts of 3-aminopropyltriethoxysilane and 40-60 parts of silicon dioxide nanoparticles by weight.

Preferably, the raw materials of the water-based epoxy curing agent comprise the following components: by weight, 80-95 parts of bisphenol A type epoxy resin, 10-15 parts of triethylene tetramine and 4-8 parts of glycidyl carboxylate.

Preferably, the glycidyl carboxylate has an epoxy group equivalent of 240 g/mol.

Preferably, the bisphenol a epoxy resin is bisphenol a epoxy resin.

Preferably, the mixing ratio of the A-component slurry to the B-component slurry is (1: 0.8) - (1: 1).

Preferably, the preparation method of the waterborne antistatic epoxy floor paint comprises the following steps:

s1: preparing a composite conductive material;

s2: preparing a water-based epoxy curing agent;

s3: and (3) preparation of epoxy floor paint.

Preferably, the method comprises the following steps:

s1: preparing a composite conductive material: (1) modifying the surface of the silicon dioxide nano particles by using 3-aminopropyltriethoxysilane to obtain aminated silicon dioxide for later use; (2) modifying the surface of the graphene oxide aerogel by using aminated silicon dioxide to obtain a composite conductive material for later use;

s2: preparing a water-based epoxy curing agent; reacting triethylene tetramine with bisphenol A epoxy resin solution in a mixed solvent of 2-butoxyethanol and n-butyl alcohol, and performing neutralization reaction by using acetic acid to obtain a water-based epoxy curing agent for later use;

s3: preparing epoxy floor paint: (1) mixing and dispersing the weighed bisphenol A epoxy resin and the active diluent in deionized water, and homogenizing to obtain component A slurry; (2) dispersing the weighed waterborne epoxy curing agent, the composite conductive material, the defoaming agent and the flatting agent in deionized water in sequence, and carrying out homogenization treatment; obtaining component B slurry; (3) and uniformly mixing the slurry of the component A and the slurry of the component B to obtain the epoxy floor paint.

Preferably, in step S1, the specific steps include: (1) stirring and dispersing the weighed 3-aminopropyltriethoxysilane in absolute ethanol, setting the stirring speed to be 300-400 rmp, and stirring for 40-60 minutes; adding ammonia water solution to adjust the pH value to 10; adding silicon dioxide nanoparticles, reacting for 1-2 hours, centrifugally washing, filtering, and drying at 50-55 ℃ to obtain aminated silicon dioxide for later use; (2) ultrasonically dispersing graphene oxide aerogel in deionized water, adding aminated silicon dioxide, and stirring at 500-600 rmp; adding ammonia water to promote dispersion and avoid partial centralized gelatinization, setting the reaction temperature to be 90-95 ℃ for 5-6 hours of reaction, filtering and washing, and freeze-drying at-30-50 ℃ to obtain the composite conductive material for later use.

Preferably, in step S2, the specific steps include: dissolving the weighed triethylene tetramine in a mixed solvent of 2-butoxyethanol and n-butanol; dripping 50 wt% of bisphenol A epoxy resin solution, and setting the reaction temperature to be 65-68 ℃ for reaction for 4-4.5 hours; adding glycidyl carboxylate into the reaction liquid, setting the reaction temperature to be 70-75 ℃, continuing to react for 3 hours, and detecting the epoxy conversion rate at intervals of 30 minutes; and after the reaction is finished, distilling under reduced pressure to remove the micromolecule amine, adding acetic acid for neutralization reaction, filtering, washing and drying to obtain the water-based epoxy curing agent for later use.

Preferably, in step S3, the solid content of the slurry of component a is 60 wt%; the solid content of the component B slurry was 55 wt%.

In the technical scheme, bisphenol A epoxy resin is used as a main body, and an active diluent is mixed to form A component slurry; the aqueous epoxy curing agent is prepared by taking bisphenol A type epoxy resin as a matrix, and a composite conductive material, a defoaming agent and a flatting agent are mixed to serve as B-component slurry.

Wherein the water-based epoxy curing agent has emulsifying property for bisphenol A epoxy resin, and increases the dispersion of the bisphenol A epoxy resin in water; the composite conductive material can effectively increase the antistatic performance and the mechanical property of the epoxy floor paint, and meanwhile, the composite conductive material assists the water-based epoxy curing agent to increase the curing rate; the defoaming agent is used for eliminating bubble formation and gap formation in the drying process, effectively enhancing the formation of a conductive network of the composite conductive material in the epoxy floor and effectively preventing static electricity. The method comprises the following specific steps:

(1) aqueous epoxy curing agent: generally, a curing agent with dual functions of emulsification and curing causes concentration of curing stress, reduction of strength and generation of cracks because the curing rate is higher than the emulsification rate.

In the scheme, in order to increase the compatibility of the curing agent and the epoxy resin, bisphenol A type epoxy resin is used as a main body, a triethylene tetramine curing agent is grafted, the reaction is stopped by using glycidyl carboxylate, acetic acid is added for neutralization reaction, and the water-based epoxy curing agent with the emulsifying performance is prepared. Wherein, the carboxylic acid glycidyl ester is used as a terminator of the reaction, which determines the content of epoxy groups and amino groups in the curing agent and can adjust the curing speed; when the content is reduced, the termination rate is too low, the curing speed is too high, and gaps are generated; when the content of the epoxy resin emulsion is increased, the average particle size of the emulsified epoxy resin emulsion is increased, and the dispersibility and the water solubility are reduced; therefore, the content thereof needs to be controlled. And acetic acid is used for neutralization reaction so as to increase the water solubility of the curing agent.

The carboxylic acid glycidyl ester terminates the reaction, so that the activity of primary amine on the molecular chain of the prepared curing agent is weakened, the curing rate is reduced, the dry water is fully volatilized, the curing is full, the crosslinking density is increased, and the problem of stress concentration is solved; and long-chain fatty amine in the molecular structure of the epoxy floor has flexibility, so that the impact of external instant force can be effectively buffered, and the impact resistance of the epoxy floor is effectively improved.

(2) Composite conductive material: the inorganic material has conductivity, can effectively increase the antistatic performance of the epoxy terrace, and has the defect of compatibility and phase difference with the polymer, so that the mechanical performance of the epoxy terrace can be improved. Therefore, inorganic materials need to be modified to synergistically increase the mechanical properties and conductivity of the epoxy terrace.

According to the scheme, the silane coupling agent is used for wrapping the silicon dioxide nano particles, amino groups are generated around the silicon dioxide nano particles, and the amino groups react with partial hydroxyl or carboxyl on the surface of the graphene oxide aerogel and are anchored on the surface of the graphene oxide aerogel, so that the conductive composite material is obtained. The graphene oxide aerogel is a three-dimensional structure substance with low density and high structural stability. Presence of three-dimensional structure: firstly, the dispersibility of graphene sheets is ensured, the flowing and permeation of liquid resin are facilitated, an effective conductive network can be constructed, the electron transfer is implemented through the conductive network, the electrostatic charge is eliminated, and the antistatic property is improved; secondly, due to the continuous porous structure, the stress transmission during the curing of the epoxy resin is promoted, and the problem of stress concentration is cooperatively solved; thirdly, the interface interaction is increased, due to the covalent reaction between the introduced active amino and the epoxy group and the hydrogen bond interaction between the oxygen-containing group and the epoxy resin in the self structure; the interface interaction of the composite conductive material and the epoxy resin is enhanced, and the mechanical property of the epoxy floor is obviously improved. In addition, due to the increase of the abundance of amino groups in the composite conductive material, the hydrophilicity in the aqueous composition is increased; and secondly, the ring-opening reaction of the amino group to the epoxy group generates secondary crosslinking, thereby promoting the sufficiency of the curing reaction.

Meanwhile, in the drying and curing process, gas is easy to be retained, and the formation of a conductive network of the epoxy terrace performance is influenced, so that the problems are effectively solved by adding the defoaming agent, and the formation of bubbles and gaps are inhibited.

Compared with the prior art, the invention has the following beneficial effects: the invention (1) takes bisphenol A type epoxy resin as a main body, a triethylene tetramine curing agent is grafted, the reaction is stopped by using glycidyl carboxylate, acetic acid is added for neutralization reaction, and the waterborne epoxy curing agent with the emulsifying property is prepared. The emulsifying and curing speed is effectively balanced, and the impact resistance of the epoxy terrace is improved; (2) modifying silicon dioxide nanoparticles with a silane coupling agent to form nanoparticles surrounded by surface amino groups, and modifying the surface of graphene oxide aerogel with the formed amino groups to obtain a composite conductive material; the three-dimensional structure of the graphene oxide aerogel is utilized to increase the flow and permeation of liquid resin; the dispersibility of the composite conductive material is improved; an effective conductive network is constructed, electrostatic charges are eliminated, and the antistatic property is improved; the auxiliary aqueous epoxy curing agent solves the problem of stress concentration; the interaction of the pages is increased, and the mechanical property is improved.

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.

Example 1:

a preparation method of a waterborne antistatic epoxy floor paint comprises the following steps:

s1: preparing a composite conductive material: (1) stirring and dispersing 21 parts of 3-aminopropyltriethoxysilane in anhydrous ethanol, setting the stirring speed to be 400rmp, and stirring for 40 minutes; adding ammonia water solution to adjust the pH value to 10; adding 46 parts of silicon dioxide nano particles, reacting for 1 hour, centrifugally washing, filtering, and drying at 55 ℃ to obtain aminated silicon dioxide for later use; (2) ultrasonically dispersing 8 parts of graphene oxide aerogel in deionized water, adding aminated silicon dioxide, and stirring to 500 rmp; adding ammonia water, setting the reaction temperature at 90 ℃ for 5 hours, filtering and washing, and freeze-drying at-50 ℃ to obtain the composite conductive material for later use.

S2: preparing a water-based epoxy curing agent; dissolving 12 parts of weighed triethylene tetramine in a mixed solvent of 2-butoxyethanol and n-butyl alcohol; preparing 86 parts of bisphenol A epoxy resin into 50 wt% bisphenol A epoxy resin solution, dripping the solution into reaction liquid, and setting the reaction temperature to be 65 ℃ for reaction for 4 hours; adding 6 parts of glycidyl carboxylate into the reaction solution, setting the reaction temperature to be 75 ℃, continuing to react for 3 hours, and detecting the epoxy conversion rate at intervals of 30 minutes; and after the reaction is finished, distilling under reduced pressure to remove the micromolecule amine, adding acetic acid for neutralization reaction, filtering, washing and drying to obtain the water-based epoxy curing agent for later use.

S3: preparing epoxy floor paint: (1) mixing and dispersing 85 parts of bisphenol A epoxy resin and 14 parts of active diluent which are weighed in deionized water, and homogenizing to obtain component A slurry; (2) dispersing 55 parts of the waterborne epoxy curing agent, 11 parts of the composite conductive material, 0.8 part of the defoaming agent and 0.2 part of the flatting agent which are weighed in deionized water in sequence, and carrying out homogenization treatment; and obtaining the component B slurry. (3) Mixing the component A slurry and the component B slurry in a ratio of 1: 0.8, and uniformly mixing to obtain the epoxy floor paint.

Example 2:

a preparation method of a waterborne antistatic epoxy floor paint comprises the following steps:

s1: preparing a composite conductive material: (1) stirring and dispersing the weighed 16 parts of 3-aminopropyltriethoxysilane in absolute ethanol, setting the stirring speed to be 300rmp and the stirring time to be 40 minutes; adding ammonia water solution to adjust the pH value to 10; adding 40 parts of silicon dioxide nano particles, reacting for 1 hour, centrifugally washing, filtering, and drying at 50 ℃ to obtain aminated silicon dioxide for later use; (2) ultrasonically dispersing 8 parts of graphene oxide aerogel in deionized water, adding aminated silicon dioxide, and stirring to 500 rmp; adding ammonia water, setting the reaction temperature at 90 ℃ for 5 hours, filtering, washing, and freeze-drying at-30 ℃ to obtain the composite conductive material for later use.

S2: preparing a water-based epoxy curing agent; dissolving 10 parts of weighed triethylene tetramine in a mixed solvent of 2-butoxyethanol and n-butyl alcohol; preparing the weighed 80 parts of bisphenol A epoxy resin into 50 wt% bisphenol A epoxy resin solution, dripping the solution into reaction liquid, and setting the reaction temperature to be 65 ℃ for reaction for 4-4.5 hours; adding 4 parts of glycidyl carboxylate into the reaction solution, setting the reaction temperature at 70 ℃ and continuing to react for 3 hours, and detecting the epoxy conversion rate at intervals of 30 minutes; and after the reaction is finished, distilling under reduced pressure to remove the micromolecule amine, adding acetic acid for neutralization reaction, filtering, washing and drying to obtain the water-based epoxy curing agent for later use.

S3: preparing epoxy floor paint: (1) mixing and dispersing 82 parts of bisphenol A epoxy resin and 12 parts of active diluent in deionized water, and homogenizing to obtain A-component slurry; (2) dispersing 50 parts of the weighed waterborne epoxy curing agent, 8 parts of the composite conductive material, 0.1 part of the defoaming agent and 0.05 part of the leveling agent in deionized water in sequence, and carrying out homogenization treatment; and obtaining the component B slurry. (3) Mixing the component A slurry and the component B slurry in a ratio of 1: 0.8, and uniformly mixing to obtain the epoxy floor paint.

Example 3:

a preparation method of a waterborne antistatic epoxy floor paint comprises the following steps:

s1: preparing a composite conductive material: (1) stirring and dispersing 24 parts of 3-aminopropyltriethoxysilane in anhydrous ethanol, setting the stirring speed to be 400rmp, and stirring for 60 minutes; adding ammonia water solution to adjust the pH value to 10; adding 60 parts of silicon dioxide nano particles, reacting for 2 hours, centrifugally washing, filtering, and drying at 55 ℃ to obtain aminated silicon dioxide for later use; (2) ultrasonically dispersing 12 parts of graphene oxide aerogel in deionized water, adding aminated silicon dioxide, and stirring to 600 rmp; adding ammonia water, setting the reaction temperature at 95 ℃ for 6 hours, filtering and washing, and freeze-drying at-50 ℃ to obtain the composite conductive material for later use.

S2: preparing a water-based epoxy curing agent; dissolving 15 parts of weighed triethylene tetramine in a mixed solvent of 2-butoxyethanol and n-butyl alcohol; preparing the weighed 95 parts of bisphenol A epoxy resin into 50 wt% bisphenol A epoxy resin solution, dripping the solution into reaction liquid, and setting the reaction temperature to be 68 ℃ for reaction for 4-4.5 hours; adding 8 parts of glycidyl carboxylate into the reaction solution, setting the reaction temperature to be 75 ℃, continuing to react for 3 hours, and detecting the epoxy conversion rate at intervals of 30 minutes; and after the reaction is finished, distilling under reduced pressure to remove the micromolecule amine, adding acetic acid for neutralization reaction, filtering, washing and drying to obtain the water-based epoxy curing agent for later use.

S3: preparing epoxy floor paint: (1) mixing and dispersing 90 parts of weighed bisphenol A epoxy resin and 20 parts of active diluent in deionized water, and homogenizing to obtain component A slurry; (2) dispersing the weighed 62 parts of waterborne epoxy curing agent, 12 parts of composite conductive material, 2 parts of defoaming agent and 2 parts of flatting agent in deionized water in sequence, and carrying out homogenization treatment; and obtaining the component B slurry. (3) Mixing the component A slurry and the component B slurry in a ratio of 1: 1, uniformly mixing to obtain the epoxy floor paint.

Example 4:

a preparation method of a waterborne antistatic epoxy floor paint comprises the following steps:

s1: preparing a composite conductive material: (1) stirring and dispersing 20 parts of 3-aminopropyltriethoxysilane in anhydrous ethanol, setting the stirring speed to be 350rmp, and stirring for 50 minutes; adding ammonia water solution to adjust the pH value to 10; adding 50 parts of silicon dioxide nano particles, reacting for 1.5 hours, centrifugally washing, filtering, and drying at 52 ℃ to obtain aminated silicon dioxide for later use; (2) ultrasonically dispersing 10 parts of graphene oxide aerogel in deionized water, adding aminated silicon dioxide, and stirring to 550 rmp; adding ammonia water, setting the reaction temperature to be 92 ℃ for 5-6 hours, filtering, washing, and freeze-drying at-40 ℃ to obtain the composite conductive material for later use.

S2: preparing a water-based epoxy curing agent; dissolving 13 parts of weighed triethylene tetramine in a mixed solvent of 2-butoxyethanol and n-butyl alcohol; preparing 88 parts of bisphenol A epoxy resin into 50 wt% bisphenol A epoxy resin solution, dripping the solution into reaction liquid, and setting the reaction temperature to be 66 ℃ for reaction for 4.25 hours; adding 6 parts of glycidyl carboxylate into the reaction solution, setting the reaction temperature to be 73 ℃, continuing to react for 3 hours, and detecting the epoxy conversion rate at intervals of 30 minutes; and after the reaction is finished, distilling under reduced pressure to remove the micromolecule amine, adding acetic acid for neutralization reaction, filtering, washing and drying to obtain the water-based epoxy curing agent for later use.

S3: preparing epoxy floor paint: (1) mixing and dispersing 86 parts of bisphenol A epoxy resin and 16 parts of active diluent in deionized water, and homogenizing to obtain A-component slurry; (2) dispersing 56 parts of weighed aqueous epoxy curing agent, 10 parts of composite conductive material, 1 part of defoaming agent and 1 part of flatting agent in deionized water in sequence, and homogenizing; and obtaining the component B slurry. (3) Mixing the component A slurry and the component B slurry in a ratio of 1: 0.9, and mixing uniformly to obtain the epoxy floor paint.

Example 5: reducing the addition amount of the carboxylic acid glycidyl ester to 2 parts; otherwise, the same as example 1;

example 6: the addition amount of the glycidyl carboxylate is increased to 10 parts; otherwise, the same as example 1;

example 7: replacing graphene oxide aerogel with graphene oxide monoliths; otherwise, the same as example 1;

example 8: the graphene aerogel is directly used without surface modification; otherwise, the same as example 1;

experiment: the waterborne antistatic epoxy floor paint prepared in the embodiments 1 to 8 is coated on a concrete sample plate and is characterized in a series of ways. (1) Testing the surface resistivity and the volume resistivity of the material according to a standard method SJ/T10694-2006, and judging the antistatic performance; (2) testing the adhesive force according to the GB/T9286 standard method; (3) testing the compressive strength of the steel according to a GB50212 standard method; the results obtained are shown in the following table:

and (4) conclusion: as can be seen from the data of the embodiments 1 to 4, the prepared water-based antistatic epoxy floor paint has low conductivity, high compressive strength and high adhesive force; the antistatic performance and the mechanical performance of the composite material are excellent. The comparative scheme is example 1.

In examples 5 and 6, the use of the aqueous epoxy hardener, which is a reduction and increase in the amount of the terminator glycidyl carboxylate, respectively, was found to decrease the compressive strength of both. The resistivity of example 5 is reduced more than that of example 6, because glycidyl carboxylate is used as a reaction terminator, which determines the content of epoxy group and amino group in the curing agent, and can adjust the curing speed; when the content of the organic silicon compound is reduced, the termination rate is too low, the curing speed is too high, gaps are generated, the mechanical property is reduced, the internal conductive network is broken, and the resistivity is increased. The data in example 6 were reduced because the average particle size of the emulsified epoxy resin emulsion was increased, and the dispersibility and water solubility were reduced, resulting in a decrease in the compressive strength.

While embodiment 7 is an embodiment in which graphene oxide monolithic is substituted for graphene oxide aerogel, from the data, both the resistivity and the compressive strength are reduced by a small margin, because the graphene aerogel has a three-dimensional porous structure, the flow and the penetration of liquid resin are effectively increased, the dispersibility of the composite conductive material is increased, the formation of a conductive network is facilitated, and the antistatic property is increased. And graphene oxide single sheets are easy to stack and are not easy to disperse. And the three-dimensional structure is not formed, so that stress transfer is inhibited, and the mechanical property is effectively reduced. The data of example 8 also show a small decrease in the degree of adhesion, because the water solubility and dispersibility of the composite conductive material are reduced without modification, and the abundance of amino groups in the molecular structure is reduced, so that the mechanical strength and adhesion are reduced.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.