CN117126582A - Preparation method of reinforced magnetic conductive wear-resistant epoxy resin composite coating - Google Patents
Preparation method of reinforced magnetic conductive wear-resistant epoxy resin composite coating Download PDFInfo
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- CN117126582A CN117126582A CN202311157835.3A CN202311157835A CN117126582A CN 117126582 A CN117126582 A CN 117126582A CN 202311157835 A CN202311157835 A CN 202311157835A CN 117126582 A CN117126582 A CN 117126582A
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- 239000011248 coating agent Substances 0.000 title claims abstract description 58
- 238000000576 coating method Methods 0.000 title claims abstract description 58
- 239000003822 epoxy resin Substances 0.000 title claims abstract description 41
- 229920000647 polyepoxide Polymers 0.000 title claims abstract description 41
- 239000002131 composite material Substances 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 17
- 239000004205 dimethyl polysiloxane Substances 0.000 claims abstract description 15
- 235000013870 dimethyl polysiloxane Nutrition 0.000 claims abstract description 15
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims abstract description 15
- 239000000945 filler Substances 0.000 claims abstract description 11
- 239000002105 nanoparticle Substances 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims abstract description 11
- CXQXSVUQTKDNFP-UHFFFAOYSA-N octamethyltrisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C CXQXSVUQTKDNFP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000004987 plasma desorption mass spectroscopy Methods 0.000 claims abstract description 9
- 238000005260 corrosion Methods 0.000 claims abstract description 8
- 230000007797 corrosion Effects 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 7
- 230000004048 modification Effects 0.000 claims abstract description 5
- 238000012986 modification Methods 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 238000001035 drying Methods 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 13
- 244000137852 Petrea volubilis Species 0.000 claims description 12
- 239000008367 deionised water Substances 0.000 claims description 9
- 229910021641 deionized water Inorganic materials 0.000 claims description 9
- 239000000758 substrate Substances 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000005498 polishing Methods 0.000 claims description 6
- -1 polydimethylsiloxane Polymers 0.000 claims description 6
- 238000001291 vacuum drying Methods 0.000 claims description 6
- 229920000128 polypyrrole Polymers 0.000 claims description 5
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000013530 defoamer Substances 0.000 claims description 3
- 239000003085 diluting agent Substances 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 238000010907 mechanical stirring Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000243 solution Substances 0.000 claims description 3
- 238000009210 therapy by ultrasound Methods 0.000 claims description 3
- 238000003828 vacuum filtration Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 239000010883 coal ash Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000003892 spreading Methods 0.000 claims 1
- 239000010881 fly ash Substances 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000010354 integration Effects 0.000 abstract 1
- 239000011159 matrix material Substances 0.000 description 6
- 239000011553 magnetic fluid Substances 0.000 description 5
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 4
- 230000003993 interaction Effects 0.000 description 3
- 230000005389 magnetism Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 229920006334 epoxy coating Polymers 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000004005 microsphere Substances 0.000 description 1
- 239000002114 nanocomposite Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011208 reinforced composite material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
-
- 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
-
- 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
- C09D5/23—Magnetisable or magnetic paints or lacquers
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2265—Oxides; Hydroxides of metals of iron
- C08K2003/2275—Ferroso-ferric oxide (Fe3O4)
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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Abstract
The invention belongs to the technical field of surface protection and multifunctional coating, and relates to a preparation method of an enhanced magnetic conductive wear-resistant epoxy resin composite coating, which is characterized by comprising surface modified fly ash balls and modified Fe 3 O 4 The nano particles are used as filler to be added into epoxy resin to prepare an epoxy resin composite coating, so that the magnetic property, hardness and corrosion resistance of the epoxy resin composite coating are improved, and the method specifically comprises the following steps: A. preparing a PDMS template; B. FACs and Fe 3 O 4 Surface modification of (a); C. and (3) preparing the surface textured epoxy resin composite coating. The invention adds FACs and Fe into the epoxy resin 3 O 4 Nanoparticles and use of surface textureThe technology is used for obtaining the epoxy resin composite coating with the surface texture, the preparation method is simple, and the process is easy to control. The coating material has the advantages of multifunction integration of good magnetic conductivity, good wear resistance and good corrosion resistance.
Description
Technical Field
The invention belongs to the technical field of surface protection and multifunctional coating, and particularly relates to a fly ash ball and Fe 3 O 4 A preparation method of a nanoparticle reinforced magnetic conductive wear-resistant epoxy resin composite coating.
Background
The magnetic fluid sealing component for aerospace and navigation works under solid-liquid two-phase magnetic fluid with the long-time on-line speed reaching more than 10m/s, and needs to have coating protection with high wear resistance and magnetic conductivity. Epoxy Resins (ERs) are widely used as coating materials due to their simple curing process, strong chemical stability and surface adhesion. However, the traditional epoxy coating has no magnetism, and the mechanical properties and the wear resistance of the epoxy coating are affected to a certain extent by the high internal stress and the brittle structure after curing. The performance of the coating can be effectively improved by adding various nano fillers into the epoxy resin. As the requirements of engineering equipment in complex environments increase, research on multifunctional composite materials using resin as a matrix has become a trend.
Fly ash balls (FACs) are waste generated after coal combustion, are spherical hollow glass microspheres containing negative pressure gas, and mainly comprise silicon dioxide and aluminum oxide, and have the characteristics of higher compressive strength, higher hardness, acid and alkali corrosion resistance, oxidation resistance, good fluidity and the like. FACs as fillers not only prevent ER degradation in acidic and alkaline environments, but also overcome stress concentrations in composites caused by other irregularly shaped or angular particle fillers. The addition of surface modified FACs can improve the wear resistance of ER materials. After surface modification, the interface interaction between FACs and the ER matrix is better, and FACs bear load. FACs that break during friction can act as reservoirs for wear debris, thereby reducing wear rate. Therefore, the mechanical property and the wear resistance of the FACs/ER composite material are greatly improved, and the FACs/ER composite material has great application potential.
Fe 3 O 4 Because of their unique catalysis, biocompatibility and relatively high saturation magnetization, they have been widely used in many fields. However, fe due to large specific surface area and strong dipole-dipole interactions 3 O 4 The nano particles are easy to agglomerate, fe 3 O 4 The poor interfacial compatibility between the nanoparticles and the polymer matrix can reduce the mechanical properties of the nanocomposite. NanoparticlesCan improve the dispersion quality, enhance the interfacial interactions between the nanoparticles and the polymer matrix. Thus, the surface-treated Fe 3 O 4 The addition to epoxy resins can introduce magnetism and can expand the applications of epoxy resins in electronics, biomedical and environmental remediation.
The surface texture is a technology obtained by bionical inspiring research on the surface of an organism, the required texture is obtained by preparing a geometric array with a certain arrangement rule on the surface of a material, and the change of various parameters of the texture such as the surface morphology, the texture size, the area occupancy and other factors can influence the performance of the surface of the material, so that the surface texture is widely used in a plurality of engineering fields.
Disclosure of Invention
The invention aims to provide a fly ash ball and Fe 3 O 4 A preparation method of a nanoparticle reinforced magnetic conductive wear-resistant epoxy resin composite coating.
The invention aims at realizing the following technical scheme:
the invention relates to a preparation method of an enhanced magnetic conductive wear-resistant epoxy resin composite coating, which is characterized in that the surface modified fly ash balls and modified Fe are adopted 3 O 4 The nano particles are used as filler to be added into the epoxy resin coating to form the epoxy resin composite coating, so that the magnetic property, hardness and corrosion resistance of the epoxy resin composite coating are improved, and the method specifically comprises the following steps:
A. preparing a PDMS template;
B. FACs and Fe 3 O 4 Surface modification of (a);
C. and (3) preparing the surface textured epoxy resin composite coating.
Further, the specific process of the step A is as follows:
and mechanically stirring a proper amount of polydimethylsiloxane and a curing agent thereof for 10-15 min at room temperature. The sand paper with different grids is paved at the bottom of a mould with the thickness of 30mm multiplied by 2mm, the obtained solution is poured on the sand paper, and then the sand paper is placed in a vacuum drying oven to eliminate bubbles. And (3) placing the die in a vacuum drying oven at 35-40 ℃ for 24 hours, and finally stripping the prepared PDMS template from the sand paper.
Further, the specific process of the step B is as follows:
drying FACs in a drying oven at 100-120 ℃ for 0.5-1.5h. Then mixing absolute ethyl alcohol and deionized water according to the proportion of 9:1, and then adding 1.5% of silane coupling agent. FACs are added into the mixed solution and stirred for 0.5 to 1.5 hours in a water bath at the temperature of 80 to 90 ℃. Then placing the mixed solution into a drying box, and drying at 100-120 ℃ to finally obtain the surface modified FACs;
taking Fe 3 O 4 And polypyrrole (PPy) in a ratio of 5:1 are placed in a container, a proper amount of deionized water is added, ultrasonic treatment is carried out for 40-60 min, constant temperature stirring is carried out for 1-2 h at 20 ℃, vacuum filtration is carried out, deionized water is used for washing, and drying is carried out at 50-80 ℃ until the constant weight is reached, thus obtaining the modified Fe 3 O 4 ；
Further, the specific process of the step C is as follows:
q235 steel was selected as a substrate and cut to 30mm by 5mm. Polishing the surface of the Q235 steel by using a polishing and grinding integrated machine, and then ultrasonically cleaning the surface by using absolute ethyl alcohol for 10-15 min to remove impurities on the surface;
adding the epoxy resin with required mass into a container, then adding 0.8wt% of polydimethylsiloxane defoamer and 1wt% of 660A diluent, uniformly stirring, and adding 0.5wt% of surface modified FACs and 0.7wt% of modified Fe 3 O 4 After mechanical stirring for 10 min-30 min, adding a curing agent, stirring in a water bath at 35-40 ℃ for 20 min-30 min, and finally uniformly coating on the surface of the Q235 steel substrate by using a steel wire rod coater;
uniformly coating the epoxy resin mixture on a Q235 steel substrate, placing a PDMS template on the surface of the ER coating, removing bubbles in the mixture by pulling and vacuumizing, then curing for 1-2 h in a drying oven at 100-120 ℃, and finally curing for 12-24 h at room temperature to obtain the epoxy resin composite coating with surface texture.
The invention has the outstanding advantages that:
1. the invention starts from the service working condition and technical index of the coating in engineering equipment, and constructs the coating with integrated and coordinated functions, including magnetic permeability, wear resistance and corrosion resistance, by designing the coating components and the surface structure.
2. Aiming at the problem of low permeability of the traditional epoxy resin coating, the invention selects modified Fe 3 O 4 The filler is added into the ER coating, so that the magnetism of the ER composite coating can be increased, and the filler has higher stability when the external environment temperature, vibration and the like are changed; on the basis of filler reinforcement, the introduction of the surface texture establishes a double barrier, delays penetration of corrosive medium, and further improves corrosion resistance of the ER coating.
3. Aiming at the problems of poor wear resistance and insufficient hardness of the traditional ER coating, FACs and Fe are added 3 O 4 In the ER coating, the hardness of the ER composite coating can be improved; when the magnetic fluid is in sliding friction, FACs wrapped in the magnetic fluid and separated from the magnetic fluid can play the role of a rolling ball, so that the friction coefficient is reduced; broken FACs can also be used as a container to compress abrasive fragments, reducing wear.
4. The coating material has wide sources, the process condition of the coating preparation method is stable and reliable, the process flow is simple and easy to implement, and the service life of the coating in complex environments can be greatly prolonged when the coating is applied to engineering equipment.
Drawings
FIG. 1 is a schematic diagram of a magnetic conductive and wear resistant functional integrated coating on the surface of a Q235 steel of the invention.
Detailed Description
The present invention is further illustrated below in conjunction with specific examples, but should not be construed as limiting the invention. What is not described in detail in the embodiments of the present invention belongs to the prior art known to those skilled in the art.
Example 1
Fly ash ball and Fe of this example 3 O 4 The preparation method of the nanoparticle reinforced magnetic conductive wear-resistant epoxy resin composite coating comprises the following specific processes:
(1) And mechanically stirring a proper amount of polydimethylsiloxane and a curing agent thereof for 10-15 min at room temperature. The sand paper with different grids is paved at the bottom of a mould with the thickness of 30mm multiplied by 2mm, the obtained solution is poured on the sand paper, and then the sand paper is placed in a vacuum drying oven to eliminate bubbles. And (3) placing the die in a vacuum drying oven at 35-40 ℃ for 24 hours, and finally stripping the prepared PDMS template from the sand paper for later use.
(2) Drying FACs in a drying oven at 100-120 ℃ for 1h. Then mixing absolute ethyl alcohol and deionized water according to the proportion of 9:1, and then adding 1.5% of silane coupling agent. FACs are added into the mixed solution and stirred in a water bath at 80-90 ℃ for 1h. And then the mixed solution is put into a drying box and dried at the temperature of 100-120 ℃ to finally obtain the surface modified FACs for standby.
(3) Taking Fe 3 O 4 And PPy is placed in a three-neck flask according to the proportion of 5:1, a proper amount of deionized water is added, the ultrasonic treatment is carried out for 40min to 60min, the constant temperature stirring is carried out for 1h to 2h at 20 ℃, the vacuum filtration is carried out, the deionized water is used for washing, and the modified Fe is obtained after the constant weight is dried at 50 ℃ to 80 ℃ 3 O 4 。
(4) Q235 steel was selected as a substrate and cut to 30mm by 5mm. And (3) polishing the surface of the Q235 steel by using a polishing and grinding integrated machine, then ultrasonically cleaning the surface by using absolute ethyl alcohol for 10-15 min, removing impurities on the surface, and sealing for later use.
(5) Adding the epoxy resin with required mass into a beaker, then adding 0.8wt% of polydimethylsiloxane defoamer and 1wt% of 660A diluent, uniformly stirring, and adding 0.5wt% of surface modified FACs and 0.7wt% of modified Fe 3 O 4 After mechanical stirring for 10 min-30 min, adding a curing agent, stirring for 20 min-30 min in a water bath at 35-40 ℃, and finally uniformly coating on the surface of the Q235 steel substrate by using a steel wire rod coater.
(6) Uniformly coating the epoxy resin mixture on a Q235 steel substrate, placing a PDMS template on the surface of the ER coating, removing bubbles in the mixture by pulling and vacuumizing, then curing for 1-2 h in a drying oven at 100-120 ℃, and finally curing for 12-24 h at room temperature to obtain the epoxy resin composite coating with surface texture.
FIG. 1 is a schematic diagram of a magnetic conductive and wear resistant functional integrated coating on the surface of a Q235 steel of the invention. Can be seen from FIG. 1As known, the magnetic conductive and wear-resistant functional integrated coating comprises FACs and Fe 3 O 4 Composite layers and textured layers of nanoparticles and epoxy. FACs and Fe 3 O 4 After surface modification, the presence of surface functional groups improves their dispersion and compatibility in the resin. The addition of a certain amount of double fillers has a synergistic effect, and the tribological performance of the filler reinforced composite material is greatly improved. FACs bond well to ER matrix, inhibit cracking, and distribute the load evenly into the matrix. Fe (Fe) 3 O 4 The thermal stability, electromagnetic performance and mechanical tensile strength of ER are increased. The introduction of the surface texture further improves the corrosion resistance and the wear resistance of the epoxy resin coating.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (4)
1. A process for preparing the reinforced magnetically conducting antiwear epoxy resin composite coating features that the surface modified powdered coal ash balls and modified Fe 3 O 4 The nano particles are used as filler to be added into epoxy resin to prepare an epoxy resin composite coating, so that the magnetic property, hardness and corrosion resistance of the epoxy resin composite coating are improved, and the method specifically comprises the following steps:
A. preparing a PDMS template;
B. FACs and Fe 3 O 4 Surface modification of (a);
C. and (3) preparing the surface textured epoxy resin composite coating.
2. The method for preparing the reinforced magnetic conductive wear-resistant epoxy resin composite coating according to claim 1, wherein the specific process of the step A is as follows:
mechanically stirring a proper amount of polydimethylsiloxane and a curing agent thereof for 10-15 min at room temperature; spreading sand paper with different grids on the bottom of a mould with the thickness of 30mm multiplied by 2mm, pouring the obtained solution on the sand paper, and then putting the sand paper into a vacuum drying oven to eliminate bubbles; and (3) placing the die in a vacuum drying oven at 35-40 ℃ for 24 hours, and finally stripping the prepared PDMS template from the sand paper.
3. The method for preparing the reinforced magnetic conductive wear-resistant epoxy resin composite coating according to claim 1, wherein the specific process of the step B is as follows:
drying FACs in a drying oven at 100-120 ℃ for 0.5-1.5h; mixing absolute ethyl alcohol and deionized water according to the proportion of 9:1, and then adding 1.5wt% of silane coupling agent; adding FACs into the mixed solution, and stirring in a water bath at 80-90 ℃ for 0.5-1.5h; then placing the mixed solution into a drying box, and drying at 100-120 ℃ to finally obtain the surface modified FACs;
taking Fe 3 O 4 And polypyrrole (PPy) in a ratio of 5:1 are placed in a container, a proper amount of deionized water is added, ultrasonic treatment is carried out for 40-60 min, constant temperature stirring is carried out for 1-2 h at 20 ℃, vacuum filtration is carried out, deionized water is used for washing, and drying is carried out at 50-80 ℃ until the constant weight is reached, thus obtaining the modified Fe 3 O 4。
4. The method for preparing the reinforced magnetically permeable and wear resistant epoxy resin composite coating according to claim 1, wherein the specific process of the step C is as follows:
q235 steel is selected as a base material, and cut into pieces of 30mm multiplied by 5mm; polishing the surface of the Q235 steel by using a polishing and grinding integrated machine, and then ultrasonically cleaning the surface by using absolute ethyl alcohol for 10-15 min to remove impurities on the surface;
adding the epoxy resin with required mass into a container, then adding 0.8wt% of polydimethylsiloxane defoamer and 1wt% of 660A diluent, uniformly stirring, and adding 0.5wt% of surface modified FACs and 0.7wt% of modified Fe 3 O 4 After mechanical stirring for 10 min-30 min, adding a curing agent, stirring in a water bath at 35-40 ℃ for 20 min-30 min, and finally uniformly coating on the surface of the Q235 steel substrate by using a steel wire rod coater;
uniformly coating the epoxy resin mixture on a Q235 steel substrate, placing a PDMS template on the surface of the ER coating, removing bubbles in the mixture by pulling and vacuumizing, then curing for 1-2 h in a drying oven at 100-120 ℃, and finally curing for 12-24 h at room temperature to obtain the epoxy resin composite coating with surface texture.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106700870A (en) * | 2015-07-30 | 2017-05-24 | 中国科学院宁波材料技术与工程研究所 | Textured polyurethane-graphene anti-corrosion composite coating and preparation method and application thereof |
| CN107604648A (en) * | 2017-09-12 | 2018-01-19 | 泉州坤莎新材料科技有限公司 | The fabric preparation method of composite Nano ferroso-ferric oxide Pt/Polypyrrole composite material |
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| CN107623459A (en) * | 2017-09-07 | 2018-01-23 | 哈尔滨工业大学深圳研究生院 | Friction nanometer power generator frictional layer material surface roughening agrees with structure and preparation method thereof |
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