CN112680066A - PANI/single-slice MoS2Modified epoxy composite anticorrosive paint and preparation method thereof - Google Patents

PANI/single-slice MoS2Modified epoxy composite anticorrosive paint and preparation method thereof Download PDF

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CN112680066A
CN112680066A CN202011580267.4A CN202011580267A CN112680066A CN 112680066 A CN112680066 A CN 112680066A CN 202011580267 A CN202011580267 A CN 202011580267A CN 112680066 A CN112680066 A CN 112680066A
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CN112680066B (en
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李晓丹
刘宏宇
刘小平
刘小清
胡心雨
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Chongqing Technology and Business University
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Abstract

The application provides a PANI/monolithic layer MoS2The modified epoxy composite anticorrosive paint is prepared from PANI/single-layer MoS2The modified epoxy composite anticorrosive paint comprises the following components in parts by weight: 60-80 parts of epoxy resin, 20-40 parts of curing agent, 1-5 parts of organic solvent and 1-10 parts of composite material. PANI/single-slice MoS2The preparation method of the modified epoxy composite anticorrosive paint is characterized in that polyaniline is intercalated in MoS2An intercalation structure is formed among the layers of the nano sheets, and the surface modification can be carried out on the nano material by utilizing the characteristic that polyaniline can be doped while the compactness of the coating is improved by utilizing nano particles, so that the surface energy of the nano material is reduced. Thus, polyaniline was modified into MoS2The epoxy resin is blended to prepare the composite coating, and on one hand, the composite coating can play a role in shielding water and oxygenAnd the like, and on the other hand, the anti-corrosion functional filler can play a role in anode passivation.

Description

PANI/single-slice MoS2Modified epoxy composite anticorrosive paint and preparation method thereof
Technical Field
The application relates to the technical field of preparation of nano composite materials and anticorrosive coatings, in particular to PANI/single-layer MoS2Modified epoxy composite anticorrosive paint and a preparation method thereof.
Background
All metal materials and their parts are inevitably subjected to air, water and SO in various environments when being processed, stored and used in various environments2And the corrosion action of the medium, corrosion and breakage occur, and the metal component is failed and damaged. The application of metals has been popularized in the aspects of human life, the problems caused by metal corrosion are always emphasized, and various anticorrosion measures are developed. The combined use of organic coatings and cathodic protection methods is an important means for the corrosion prevention of steel structures in complex environments. In the initial service stage, the coating is complete, the corrosion protection is mainly carried out by the organic coating, the physical barrier layer provided for the metal surface reduces the current demand of a cathode protection system, the protection current required in the cathode protection process is greatly reduced, and the energy conservation is facilitated. In the middle and later service period, the coating is degraded, the base metal is exposed and can be compensated in a cathode protection mode, the required cathode polarization current density is increased, the steel structure can be well protected, and the base material is prevented from being corroded continuously.
Theoretically, the superposition of the two measures of coating and cathodic protection can produce good protection effect, and in fact, the large-area peeling of the coating occurs in a plurality of steel structure facilities for less than 5 years. For this reason, although steel structures are combined with coatings and cathodic protection measures, the surfaces of coatings with better performance inevitably have defects during use. Once defects are formed, the cathode protection can protect the exposed metal parts from corrosion, but the coating adjacent to the defects often causes cathode peeling due to cathode reaction, and is easily subjected to severe corrosion phenomena due to complex environments such as dry-wet/wet difference and high salt content.
Barrier properties are an important measure of coating quality and corrosion protection efficiency, with fillers playing a crucial role. The traditional granular coating such as zinc powder, copper oxide and the like is easy to be porous due to high content; and because the coating is thick, the coating shrinks in the drying process, cracks are easy to appear, and the anticorrosion effect is reduced.
Disclosure of Invention
The application provides a PANI/single layer MoS2The modified epoxy composite anticorrosive paint and the preparation method thereof solve the problem that the coating is easy to be porous due to high content of the traditional granular coating such as zinc powder, copper oxide and the like; and because the coating is thick, the coating shrinks in the drying process, cracks are easy to appear, and the anticorrosion effect is reduced.
In one aspect, the present application provides a PANI/single layer MoS2The modified epoxy composite anticorrosive paint comprises the following components in parts by weight: 60-80 parts of epoxy resin, 20-40 parts of curing agent, 1-5 parts of organic solvent and 1-10 parts of composite material.
Optionally, PANI/monolithic layer MoS in the coating2The nano material is prepared by introducing PANI into MoS by a stripping and re-stacking method2In the molecular layer, the formed intercalation composite material; the PANI/single-layer MoS2The average particle diameter of the nano material is 500nm-1000nm, and the specific surface area is 10m2/g-100m2/g。
Optionally, the epoxy resin is one or more of bisphenol a epoxy resin, bisphenol F epoxy resin, bisphenol S epoxy resin, bisphenol H epoxy resin, and novolac epoxy resin.
Optionally, the curing agent is one or more of a low-molecular polyamide curing agent, an aromatic amine curing agent, a phenolic aldehyde amine curing agent, an anhydride curing agent and an imidazole curing agent.
Optionally, the PANI/single-slice MoS2The mass ratio of the composite material to the epoxy resin is as follows: 1: (7-35).
In another aspect, the present application provides a PANI/monolithic layer MoS2The preparation method of the modified epoxy composite anticorrosive paint comprises the following steps:
under the protection of nitrogen, MoS is added2Adding the solid powder into a 100ml three-necked bottle at room temperature, adding n-butyllithium solution, performing magnetic stirring, maintaining the reaction atmosphere of nitrogen, performing stirring reaction for 48-72 hours, and standing for layering after the reaction is finished to obtain a stirring solution;
adding the stirring liquid into n-hexane for washing to obtain black solid LiXMoS2；
Towards black solid LiXMoS2Adding deionized water, performing hydrolysis reaction, and collecting upper layer liquid to obtain MoS2A monolayer suspension;
dissolving APS in 1mol.L-1And adding the HCl solution to the MoS2Stirring the single-layer suspension in an ice-water bath;
to MoS2Adding aniline monomer into the single-layer suspension, and carrying out polymerization reaction for 6-12h to obtain a reaction product;
filtering the reaction product, repeatedly washing the reaction product with acetone and deionized water, and drying the reaction product in a vacuum drying oven at 50-80 ℃ for 18-36h to obtain a dark green powder product;
mixing epoxy resin, curing agent, PANI/single-layer MoS2Mechanically stirring the composite material and the organic solvent until the composite material and the organic solvent are uniformly dispersed to obtain the PANI/single-layer MoS2Modified epoxy composite coating.
Optionally, the epoxy composite coating is coated on the surface of a metal substrate and then cured for 1-5 days at normal temperature to obtain PANI/single-layer MoS2Modified epoxy composite coating.
Optionally, MoS2: the molar ratio of n-butyllithium to n-butyllithium was 1:3, and the n-butyllithium concentration was 1.3 mol/L.
According to the technical scheme, the PANI/single-layer MoS is provided2The modified epoxy composite anticorrosive paint is prepared from PANI/single-layer MoS2The modified epoxy composite anticorrosive paint comprises the following components in parts by weight: 60-80 parts of epoxy resin, 20-40 parts of curing agent, 1-5 parts of organic solvent and 1-10 parts of composite material. PANI/single-slice MoS2Modified epoxy compositeThe preparation method of the anticorrosive paint is characterized in that polyaniline is intercalated in MoS2An intercalation structure is formed among the layers of the nano sheets, and the surface modification can be carried out on the nano material by utilizing the characteristic that polyaniline can be doped while the compactness of the coating is improved by utilizing nano particles, so that the surface energy of the nano material is reduced. Thus, polyaniline was modified into MoS2The composite coating prepared by blending the epoxy resin can play a role in shielding corrosive media such as water, oxygen and the like on one hand, and can play a role in passivating the anode on the other hand.
The invention adopts PANI/single-layer MoS2The composite material is used as filler to prepare PANI/single-layer MoS2Modified epoxy composite coating, low addition amount of PANI/single-layer MoS2Composite PANI/monolithic layer MoS2The modified epoxy composite coating has excellent corrosion resistance, and the introduction of polyaniline can improve PANI/single-layer MoS2The conductivity of the composite material greatly reduces the corrosion rate of metal, and the existence of molybdenum sulfide can improve the dispersion solubility of polyaniline in epoxy resin and improve the wear resistance, corrosion resistance and toughness of the composite resin. The invention has simple preparation process and low cost, can be coated on the surfaces of different objects in various ways and applied, and is PANI/single-layer MoS2Composite PANI/monolithic layer MoS2The modified epoxy composite coating has excellent corrosion resistance, unexpected mechanical properties and excellent thermal stability.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 shows the PANI/monolithic MoS prepared in the examples of the present application2SEM images of the composite;
FIG. 2 shows PANI/monolithic MoS prepared according to the examples of the present application2SEM picture of modified epoxy composite anticorrosive coating;
FIG. 3 is a PANI/mono product prepared in example 1 of the present applicationLamellar MoS2TGA chart of the modified epoxy composite anticorrosive coating;
FIG. 4 shows the PANI/monolithic MoS layer prepared in example 1 of the present application2An electrochemical impedance spectrogram of the modified epoxy composite anticorrosive coating;
FIG. 5 shows the PANI/monolithic MoS layer prepared in example 2 of the present application2TGA chart of the modified epoxy composite anticorrosive coating;
FIG. 6 shows the PANI/monolithic MoS layer prepared in example 2 of the present application2An electrochemical impedance spectrogram of the modified epoxy composite anticorrosive coating;
FIG. 7 shows the PANI/monolithic MoS layer prepared in example 3 of the present application2TGA chart of the modified epoxy composite anticorrosive coating;
FIG. 8 is the PANI/monolithic MoS layer prepared in example 3 of the present application2And (3) an electrochemical impedance spectrogram of the modified epoxy composite anticorrosive coating.
Detailed Description
Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following examples do not represent all embodiments consistent with the present application. But merely as exemplifications of systems and methods consistent with certain aspects of the application, as recited in the claims.
Conductive polymers have been widely used in the field of corrosion protection by virtue of their excellent corrosion protection properties. Polyaniline is one of the most representative conductive polymers, is easy to synthesize, high in conductivity and good in stability, and has a unique doping phenomenon, so that iron-based metals (including iron, carbon steel and stainless steel) can be promoted to be passivated by covering polyaniline on the surface of the metal, the potential of the iron-based metals is maintained in a passivation area, and the corrosion speed of the metal is greatly reduced. Because of the poor solubility of polyaniline and the porosity and low adhesiveness of pure polyaniline, the polyaniline must be compounded with other components to achieve the ideal anticorrosion effect. The polyaniline and the organic resin are blended, so that the adhesive force and the water resistance of the coating can be improved, the metal area needing to be protected can be reduced, and the polyaniline only needs to passivate the exposed metal at the defect part of the coating, so that the preparation method of the polyaniline coating is most hopeful to be applied in a steel corrosion environment.
Barrier properties are another important measure of coating quality and corrosion protection efficiency, with fillers playing a crucial role. The traditional granular coating such as zinc powder, copper oxide and the like is easy to be porous due to high content; and because the coating is thick, the coating shrinks in the drying process, cracks are easy to appear, and the anticorrosion effect is reduced. In recent years, the role of graphene two-dimensional material modifiers in organic coatings has been attracting attention, and molybdenum sulfide (MoS)2) Has a two-dimensional chemical structure similar to graphene, and weak van der Waals force exists between layers, but is different from graphene and MoS2Has semiconductor properties, is added into resin without influencing the conductivity of resin matrix, therefore, MoS2The application of the composite resin in organic resin to improve the wear resistance, corrosion resistance and toughness of the composite resin becomes one of the hot problems of current research and study.
Example 1
1. Single-layer MoS2Preparation of the suspension
0.352g of MoS was weighed out under nitrogen protection2The solid powder was charged into a 150mL three-necked flask, and an n-butyllithium solution was added thereto, followed by magnetic stirring at room temperature. The reaction atmosphere of nitrogen was maintained, the reaction was stirred for 72 hours, and after the reaction was completed, the mixture was allowed to stand for delamination. Washing with n-hexane, and removing excessive n-hexane liquid to obtain black solid LiXMoS2. Adding a proper amount of deionized water and LiXMoS2Strong hydrolysis of MoS2Taking the upper layer liquid to obtain MoS2A monolayer suspension.
PANI/Single-slice MoS2Preparation of composite materials
Prepared MoS2The monolayer suspension was placed in a three-necked flask and 1.254g of APS was dissolved in 50mL of 1mol-1HCl solution was added dropwise to the MoS2The suspension was dissolved in an ice-water bath with sufficient stirring. Then, 2mL of aniline monomer was slowly added dropwise to the three-necked flask, and the mixture was polymerized for 6 hours. The reaction product is filtered, repeatedly washed by acetone and deionized water, and then placed in a vacuum drying oven at 60 DEG CDrying for 24h to obtain a dark green powder product. nPANI nMOS2＝1∶0.1。
PANI/Single-slice MoS2Preparation of modified epoxy composite coating
Weighing 0.7g of epoxy resin, 0.28g of curing agent and PANI/single-layer MoS according to the proportion20.02g of composite material and 1mL of organic solvent are mechanically stirred until the mixture is uniformly dispersed to obtain PANI/single-layer MoS2Modified epoxy composite coating. Coating the epoxy composite coating on the surface of a metal substrate, and curing for 3 days at normal temperature to obtain PANI/single-layer MoS2Modified epoxy composite coating. FIG. 1 shows the PANI/monolithic MoS layer prepared in example 1 of the present application2SEM image of the composite material. FIG. 2 shows PANI/monolithic MoS prepared according to the examples of the present application2SEM picture of modified epoxy composite anticorrosive coating.
After the coating obtained in example 1 was sprayed or brushed on a predetermined substrate surface to cure and form a film, the corresponding properties were evaluated by using an electrochemical workstation (CHI660E), a thermogravimetric analyzer (TGA), and dynamic mechanical properties (DMA). FIG. 3 shows the PANI/monolithic MoS layer prepared in example 1 of the present application2TGA chart of the modified epoxy composite anticorrosive coating. The decomposition temperature of the pure epoxy resin is 323.5 deg.C, the decomposition temperature of the modified epoxy resin is 360.6 deg.C, and the decomposition temperature is increased by 37.1 deg.C, which shows that the modified epoxy resin has improved thermal stability, and FIG. 4 shows that the PANI/monolithic MoS prepared in example 1 of the present application has improved thermal stability2And (3) an electrochemical impedance spectrogram of the modified epoxy composite anticorrosive coating. The corrosion resistance of the coating can be evaluated by the arc and the radius of the arc in the Nyquist plot. The larger the radius of the arc, the better the corrosion resistance of the coating. As can be seen from the figure, the arcs and the radius of the arcs in the modified epoxy resin figure are significantly larger compared with the pure epoxy resin, and the corrosion resistance of the modified epoxy resin coating is better than that of the pure epoxy resin.
Example 2
1. Single-layer MoS2Preparation of the suspension
Under the protection of nitrogen, 1.056g of MoS is weighed2Adding the solid powder into a 150mL three-neck flask, adding n-butyl lithium solution, and performing magnetic forceStirring was carried out magnetically at room temperature. The reaction atmosphere of nitrogen was maintained, the reaction was stirred for 72 hours, and after the reaction was completed, the mixture was allowed to stand for delamination. Washing with n-hexane, and removing excessive n-hexane liquid to obtain black solid LiXMoS2. Adding a proper amount of deionized water and LiXMoS2Strong hydrolysis of MoS2Taking the upper layer liquid to obtain MoS2A monolayer suspension.
PANI/Single-slice MoS2Preparation of composite materials
Prepared MoS2The monolayer suspension was placed in a three-necked flask and 1.254g of APS was dissolved in 50mL of 1mol-1HCl solution was added dropwise to the MoS2The suspension was dissolved in an ice-water bath with sufficient stirring. Then, 2mL of aniline monomer was slowly added dropwise to the three-necked flask, and the mixture was polymerized for 6 hours. And (3) carrying out suction filtration and repeated washing on the reaction product by using acetone and deionized water, and then placing the reaction product in a vacuum drying oven for drying treatment at 60 ℃ for 24 hours to obtain a dark green powder product. nPANI nMOS2＝1∶0.3。
PANI/Single-slice MoS2Preparation of modified epoxy composite coating
Weighing 0.7g of epoxy resin, 0.28g of curing agent and PANI/single-layer MoS according to the proportion20.02g of composite material and 1mL of organic solvent are mechanically stirred until the mixture is uniformly dispersed to obtain PANI/single-layer MoS2Modified epoxy composite coating. Coating the epoxy composite coating on the surface of a metal substrate, and curing for 3 days at normal temperature to obtain PANI/single-layer MoS2Modified epoxy composite coating.
After the coating obtained in example 2 was sprayed or brushed on a predetermined substrate surface to cure and form a film, the corresponding properties were evaluated by using an electrochemical workstation (CHI660E) and a thermogravimetric analyzer (TGA). FIG. 5 shows the PANI/monolithic MoS layer prepared in example 2 of the present application2TGA chart of the modified epoxy composite anticorrosive coating. The decomposition temperature of the pure epoxy resin is 323.5 ℃ and the decomposition temperature of the modified epoxy resin is 334.9 ℃ and the decomposition temperature is increased by 11.4 ℃, which shows that the modified epoxy resin has improved thermal stability, and FIG. 6 shows that the PANI/monolithic MoS prepared in example 2 of the present application has improved thermal stability2Modified epoxy composite anticorrosive coating electrochemistryImpedance spectrum. The corrosion resistance of the coating can be evaluated by the arc and the radius of the arc in the Nyquist plot. The larger the radius of the arc, the better the corrosion resistance of the coating. As can be seen from the figure, the arcs and the radius of the arcs in the modified epoxy resin figure are significantly larger compared with the pure epoxy resin, and the corrosion resistance of the modified epoxy resin coating is better than that of the pure epoxy resin.
Example 3
1. Single-layer MoS2Preparation of the suspension
Under nitrogen protection, 1.76g of MoS was weighed2Adding the solid powder into a 150mL three-neck flask, adding n-butyllithium solution, carrying out magnetic stirring at room temperature, maintaining the reaction atmosphere of nitrogen, carrying out stirring reaction for 72 hours, and standing for layering after the reaction is finished. Washing with n-hexane, and removing excessive n-hexane liquid to obtain black solid LiXMoS2. Adding a proper amount of deionized water and LiXMoS2Strong hydrolysis of MoS2Taking the upper layer liquid to obtain MoS2A monolayer suspension.
PANI/Single-slice MoS2Preparation of composite materials
Prepared MoS2The monolayer suspension was placed in a three-necked flask and 1.254g of APS was dissolved in 50mL of 1mol-1HCl solution was added dropwise to the MoS2The suspension was dissolved in an ice-water bath with sufficient stirring. Then, 2mL of aniline monomer was slowly added dropwise to the three-necked flask, and the mixture was polymerized for 6 hours. And (3) carrying out suction filtration and repeated washing on the reaction product by using acetone and deionized water, and then placing the reaction product in a vacuum drying oven for drying treatment at 60 ℃ for 24 hours to obtain a dark green powder product. nPANI nMOS2＝1∶0.5。
PANI/Single-slice MoS2Preparation of modified epoxy composite coating
Weighing 0.7g of epoxy resin, 0.28g of curing agent and PANI/single-layer MoS according to the proportion20.02g of composite material and 1ml of organic solvent are mechanically stirred until the mixture is uniformly dispersed to obtain PANI/single-layer MoS2Modified epoxy composite coating. Coating the epoxy composite coating on the surface of a metal substrate, and curing for 3 days at normal temperature to obtain PANI/single-layer MoS2Modification ofAnd (3) epoxy composite coating.
After the coating obtained in example 3 was sprayed or brushed on a predetermined substrate surface to cure and form a film, the corresponding properties were evaluated by using an electrochemical workstation (CHI660E) and a thermogravimetric analyzer (TGA). FIG. 7 shows the PANI/monolithic MoS layer prepared in example 3 of the present application2TGA chart of the modified epoxy composite anticorrosive coating. The decomposition temperature of the pure epoxy resin is 323.5 deg.C, the decomposition temperature of the modified epoxy resin is 360.5 deg.C, and the decomposition temperature is increased by 37 deg.C, which shows that the modified epoxy resin has improved thermal stability, and FIG. 8 shows that the PANI/monolithic MoS prepared in example 3 of the present application has improved thermal stability2And (3) an electrochemical impedance spectrogram of the modified epoxy composite anticorrosive coating. The corrosion resistance of the coating can be evaluated by the arc and the radius of the arc in the Nyquist plot. The larger the radius of the arc, the better the corrosion resistance of the coating. As can be seen from the figure, the arcs and the radius of the arcs in the modified epoxy resin figure are significantly larger compared with the pure epoxy resin, and the corrosion resistance of the modified epoxy resin coating is better than that of the pure epoxy resin.
The higher the resistance value of the coating, the better the corrosion resistance of the coating. Higher corrosion voltage and lower corrosion current density represent better corrosion resistance of the coating. The results of the other anticorrosion coating performance tests are shown in Table 1 below
Table 1 test results of various properties of anticorrosive coating
Figure BDA0002865819240000061
Figure BDA0002865819240000071
The test results show that: PANI/monolithic MoS of the invention according to the analysis of examples 1-32Compared with a pure epoxy resin coating, the decomposition temperature of the modified epoxy resin coating is respectively increased by 37.1 ℃, 11.4 ℃ and 37 ℃, the arc and the arc radius of the modified epoxy resin coating are obviously increased, and the impedance value of the modified epoxy resin coating is respectively increased by 1.93 multiplied by 105ohm，1.21×105ohm，1.91×105In ohm, the corrosion voltage of the modified epoxy resin coating is respectively increased by 0.235V, 0.21V and 0.23V, and the corrosion current density of the modified epoxy resin coating is respectively reduced by 1-2 orders of magnitude, so that the experimental scheme of the example 1 is optimal, various data are optimal, and the corrosion resistance is excellent. Due to PANI/single layer MoS2Incorporation of composite materials to render PANI/monolithic layer MoS2Compared with the modified epoxy composite coating, the modified epoxy composite coating has excellent corrosion resistance, mechanical property and thermal stability, and greatly reduces the corrosion rate of steel.
According to the technical scheme, the PANI/single-layer MoS is provided2The modified epoxy composite anticorrosive paint is prepared from PANI/single-layer MoS2The modified epoxy composite anticorrosive paint comprises the following components in parts by weight: 60-80 parts of epoxy resin, 20-40 parts of curing agent, 1-5 parts of organic solvent and 1-10 parts of composite material. PANI/single-slice MoS2The preparation method of the modified epoxy composite anticorrosive paint is characterized in that polyaniline is intercalated in MoS2An intercalation structure is formed among the layers of the nano sheets, and the surface modification can be carried out on the nano material by utilizing the characteristic that polyaniline can be doped while the compactness of the coating is improved by utilizing nano particles, so that the surface energy of the nano material is reduced. Thus, polyaniline was modified into MoS2The composite coating prepared by blending the epoxy resin can play a role in shielding corrosive media such as water, oxygen and the like on one hand, and can play a role in passivating the anode on the other hand.
The embodiments provided in the present application are only a few examples of the general concept of the present application, and do not limit the scope of the present application. Any other embodiments extended according to the scheme of the present application without inventive efforts will be within the scope of protection of the present application for a person skilled in the art.

Claims (8)

  1. PANI/Single-slice MoS2The modified epoxy composite anticorrosive paint is characterized in that the formula proportion of the paintComprises the following components in parts by weight: 60-80 parts of epoxy resin, 20-40 parts of curing agent, 1-5 parts of organic solvent and 1-10 parts of composite material.
  2. 2. The PANI/monolithic layer MoS of claim 12The modified epoxy composite anticorrosive paint is characterized in that PANI/single-layer MoS in the paint2The nano material is prepared by introducing PANI into MoS by a stripping and re-stacking method2In the molecular layer, the formed intercalation composite material; the PANI/single-layer MoS2The average particle diameter of the nano material is 500nm-1000nm, and the specific surface area is 10m2/g-100m2/g。
  3. 3. The PANI/monolithic layer MoS of claim 12The modified epoxy composite anticorrosive paint is characterized in that the epoxy resin is one or more of bisphenol A epoxy resin, bisphenol F epoxy resin, bisphenol S epoxy resin, bisphenol H epoxy resin and novolac epoxy resin.
  4. 4. The PANI/monolithic layer MoS of claim 12The modified epoxy composite anticorrosive paint is characterized in that the curing agent is one or more of low-molecular polyamide curing agent, aromatic amine curing agent, phenolic aldehyde amine curing agent, anhydride curing agent and imidazole curing agent.
  5. 5. The PANI/monolithic layer MoS of claim 12The modified epoxy composite anticorrosive paint is characterized in that the PANI/single-layer MoS2The mass ratio of the composite material to the epoxy resin is 1: (7-35).
  6. PANI/Single-slice MoS2The preparation method of the modified epoxy composite anticorrosive paint is characterized by comprising the following steps:
    under the protection of nitrogen, MoS is added2Adding the solid powder into a 100ml three-necked bottle at room temperature, adding n-butyllithium solution, magnetically stirring, maintaining the reaction atmosphere of nitrogen, stirring for 48-72 hours, standing for layering after the reaction is finished to obtain a stirred solutionLiquid;
    adding the stirring liquid into n-hexane for washing to obtain black solid LiXMoS2；
    Towards black solid LiXMoS2Adding deionized water, performing hydrolysis reaction, and collecting upper layer liquid to obtain MoS2A monolayer suspension;
    dissolving APS in 1mol.L-1And adding the HCl solution to the MoS2Stirring the single-layer suspension in an ice-water bath;
    to MoS2Adding aniline monomer into the single-layer suspension, and carrying out polymerization reaction for 6-12h to obtain a reaction product;
    filtering the reaction product, repeatedly washing the reaction product with acetone and deionized water, and drying the reaction product in a vacuum drying oven at 50-80 ℃ for 18-36h to obtain a dark green powder product;
    mixing epoxy resin, curing agent, PANI/single-layer MoS2Mechanically stirring the composite material and the organic solvent until the composite material and the organic solvent are uniformly dispersed to obtain the PANI/single-layer MoS2Modified epoxy composite coating.
  7. 7. The preparation method according to claim 6, further comprising applying the epoxy composite coating on the surface of the metal substrate, followed by curing at normal temperature for 1-5 days to obtain PANI/single-layer MoS2Modified epoxy composite coating.
  8. 8. The method of claim 6, wherein MoS2: the molar ratio of n-butyllithium to n-butyllithium was 1:3, and the n-butyllithium concentration was 1.3 mol/L.
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CN107731569A (en) * 2017-11-20 2018-02-23 上海交通大学 2 D mesopore polyaniline/MoS2The preparation method and application of composite nano materials

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