CN110743767A - Preparation method of magnetic response dynamic coating - Google Patents
Preparation method of magnetic response dynamic coating Download PDFInfo
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- CN110743767A CN110743767A CN201910900301.2A CN201910900301A CN110743767A CN 110743767 A CN110743767 A CN 110743767A CN 201910900301 A CN201910900301 A CN 201910900301A CN 110743767 A CN110743767 A CN 110743767A
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- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/002—Pretreatement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/20—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by magnetic fields
- B05D3/207—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by magnetic fields post-treatment by magnetic fields
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
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- 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
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C—CHEMISTRY; METALLURGY
- 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
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1687—Use of special additives
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/23—Magnetisable or magnetic paints or lacquers
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- 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)
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- 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
- C08K2201/01—Magnetic additives
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Abstract
The invention relates to a preparation method of a magnetic response dynamic coating, belonging to the field of surface protection. The coating comprises: 1. an organosilicon film layer doped with magnetic response particles; 2. the interior of the film layer is of a porous structure, and the exterior of the film layer is of a micro-nano rough surface; 3. lubricating oil containing bactericide and corrosion inhibitor is stored in the film layer and the pore structure. By applying an external magnetic field, the internal magnetic particles vibrate, and the extrusion coating secretes lubricating oil, so that the surface is kept lubricated for a long time. While the magnetic particles vibrate to form a dynamically unstable surface. The synergistic effect of the super-smooth surface and the dynamic surface plays an effective protection role. Greatly prolongs the service life of the ultra-smooth surface and enhances the anti-corrosion and anti-fouling functions.
Description
Technical Field
The invention relates to a magnetic response dynamic coating and a preparation method thereof, belonging to the field of surface protection.
Background
Ocean engineering such as an ocean drilling platform, a wharf and the like, and ocean equipment such as a ship, a submarine and the like are often polluted by phytoplankton, animals and microorganisms in the ocean, so that the engineering or the equipment is damaged, for example, a ship propeller is wound by barnacles, shellfish grows on the surface of the submarine to influence the submergence of the ship propeller, a steel structure of the ocean platform is broken, a coating of a pier falls off and the like. The cause of the microbial fouling is that the accumulated microbes are metabolized for a long time, and the formed extracellular substances or phagocytosed carbon and nitrogen sources gradually damage materials, so that the problem of material corrosion is developed, the facility maintenance cost is increased, and even the engineering safety is influenced. Therefore, the development of marine antifouling technology becomes an important technology affecting the development of the sea.
At present, the antifouling paint is the simplest and most convenient marine antifouling method. According to the different antifouling principles, the antifouling techniques can be divided into the following two types: physical antifouling and chemical antifouling. The physical antifouling mainly comprises mechanical cleaning, ultrasonic cleaning, ultraviolet irradiation, a water jet method and the like. The adhesion between the surface of the material and the attached organisms is destroyed by the applied physical energy. The method is non-toxic and environment-friendly, has long retention time, but the surface of the material is easy to damage by overlarge impact force or peeling force, and is difficult to completely remove for large-scale devices or special-shaped surfaces. Chemical antifouling is the inhibition of the attachment of microorganisms or the toxic killing of microorganisms by the addition or generation of effective chemicals, (e.g., cuprous oxide, organotin, capsaicin, protease, etc.) that diffuse around the surface, usually through the self-polishing action of the coating itself, or the penetration of fillers. Chemical antifouling can effectively prevent microorganism from attaching, but substances diffused from the coating kill microbes and destroy marine ecology; when the additives are depleted, the coating loses its protective function and needs to be recoated.
In recent years, the bionic antifouling paint is a newly developed effective method for preventing and treating biofouling without toxicity and environmental protection. Organisms in nature such as sharks, dolphins and whales live in the sea for a long time, but are not bothered by the attachment of microorganisms. Researchers found that the surface of the shark skin has micro-nano-scale grooves, and mucus can be secreted to form a very smooth film layer. The lubricating liquid is stored on the rough surface through the capillary action of the surface micro-nano structure to form a liquid protective film layer to isolate the direct contact between the liquid drops and the substrate. The tentacles and cilia of the microbial spores are difficult to be fixedly attached to the surface of the lubricating liquid. Inspired by the above, scientists pour lubricating oil into the micro-nano coarse structure to prepare the anti-fouling ultra-smooth coating. The smooth oil film isolates the direct contact between an environmental medium and a substrate, and endows the coating with excellent performances such as self-cleaning, lyophobic and anti-adhesion, and the ultra-smooth coating is quickly paid attention by researchers. However, due to the fluidity and instability of the lubricating liquid, the lubricating oil will gradually run off due to long-term immersion, water flow scouring and liquid drop flowing action, or be degraded due to high temperature, light radiation and the like during the actual service of the coating. The lubricating oil on the ultra-smooth surface dries up gradually, causing it to lose its "ultra-smooth" characteristics and its protective function to be gradually lost.
However, the skin of sharks in nature does not have a problem of drying out because sharks constantly secrete mucus through the body to moisten the skin. Thus, it is possible to provide
Meanwhile, the coating surface vibrates under the magnetic field to form a dynamic surface. Microorganisms and the like are more difficult to attach than static surfaces. The long-acting protection of the lubricating oil and the vibration of the surface of the coating are combined to further enhance the protection function of the coating. Once applied to the surface of a material, conventional coatings are no longer protected under control. The coating is passively protected under the action of environmental load until the service life is failed.
Disclosure of Invention
The invention aims to develop a novel super-smooth coating capable of autocrine lubricating liquid, which can quickly respond under the action of a magnetic field and generate vibration deformation, so that a squeezing film layer secretes the lubricating liquid to wet the surface, and the loss of a surface oil film is supplemented in time, thereby realizing the long-acting protection of the coating. The design idea of magnetic response enables the coating protection to be implemented in specific environment or time according to actual needs, and the protection becomes more intelligent and controllable. The service life is greatly prolonged by supplementing and repairing the lubricating liquid. The invention has important inspiration on the development of antifouling technology and promotes the application of the ultra-smooth coating in practical engineering.
A preparation method of a magnetic response dynamic coating is characterized in that,
the coating comprises a porous organic silicon film layer, magnetic response particles and lubricating oil containing a corrosion inhibitor and a bactericide; the preparation process comprises the following steps:
1) modifying the magnetically responsive particles;
2) preparing a porous organic silicon film layer;
3) preparing a micro-nano rough surface;
4) pouring lubricating oil;
the organic silicon porous membrane layer is added with a pore-forming agent through a silicon resin system, the pore-forming agent is decomposed or volatilized in the curing process to form a micro-pore structure, and pores are distributed to be porous at the bottom of a small pore on the surface; preparing a rough surface of a micro-nano structure on the surface of the film layer through laser processing; under the action of external magnetic response, magnetic particles in the film layer vibrate to enable bubbles in the film to extrude and secrete lubricating oil, the surface of the coating keeps long-acting super-smoothness, and the coating is physically vibrated in cooperation with the surface of the coating, so that effective corrosion prevention and antifouling are realized.
Further, the preparation and modification method of the magnetic response particles in the step 1) comprises the following steps: 10-15 g of carbonyl iron and 41-3 g of Fe3O are taken. The particle size of the magnetic particles is 20-50 mu m, and the magnetic induction intensity is 30-500 mT; taking ethanol: silane coupling agent: water is added according to the weight ratio of 5-10: 1-5: 80-90 (volume ratio), stirring for 10-30 min, adding 10-20 g of prepared magnetic particles, introducing nitrogen, stirring for 4-6 h at the rotating speed of 1000-1200 r/min, filtering out the magnetic particles, repeatedly washing with ethanol for three times, and drying carbonyl iron particles in vacuum at 50-80 ℃.
Further, the preparation method of the porous organic silicon film layer in the step 2) comprises the following steps: selecting 8-10 g of organic silicon resin with the viscosity of 400-1000 cp, 1-2 g of curing agent, 0.5-0.8 g of toluene and 0.2-0.5 g of ammonium carbonate; grinding for 5-10 min by a mortar, sieving by a 800-mesh screen, mixing into a resin system, stirring for 10-20 min, and placing in a vacuum box for 30-40 min. Pouring the resin into a mold, and heating in a drying oven at 80-120 ℃ for 20-30 min. And decomposing and volatilizing the pore-forming agent in the resin curing process to form the porous organic silicon film layer.
Further, the micro-nano rough surface processing method in the step 3) comprises the following steps: selecting a picosecond or femtosecond laser processor, wherein the laser power is 20-50 w, the diameter of a light spot is 5-20 mu m, and the perforation distance is 5-30 mu m; and forming to obtain the film with micro-nano porous surface.
Further, the lubricating oil pouring method comprises the following steps: selecting 100-200 g of silicone oil with surface tension of 15-30N/m and viscosity of 100-500 cp, taking 1-2 g of 8HQ, 1-1.5 g of BTA and 1-3 g of DCOIT, and mixing and stirring the silicone oil and the silicone oil for 30-60 min; and soaking the porous membrane layer in silicone oil, and placing the porous membrane layer in a vacuum box with the vacuum degree of 50-200 Pa for 60-120 min.
Further, the magnetic response particles can be Fe3O4, carbonyl iron, nickel powder, ferrosilicon aluminum and the like, and the modification substance is one or more of oleic acid, a silane coupling agent and the like.
Furthermore, the organic silicon is silicon rubber, PDMS, silicone resin and the like; the pore-forming agent is selected from a gaseous pore-forming agent or a liquid pore-forming agent, the gaseous pore-forming agent is ammonium carbonate, ammonium bicarbonate, urea and the like, and the liquid pore-forming agent is acetone, toluene, tetrahydrofuran and the like.
Modifying the magnetically responsive particles. The main process comprises the following steps: preparing a modifying liquid, gradually mixing the magnetic particles into the modifying liquid, stirring at a high speed and heating to combine the functional groups such as amino, carboxyl, epoxy and the like of the modified object with the magnetic particles.
The process characteristics of selecting magnetic particles and surface modification are as follows: the magnetic response dynamic coating has higher requirements on the particle size, the dispersion degree and the magnetic induction intensity of magnetic particles. The particle size is small, the dispersion degree is high, and more magnetic particles can be uniformly mixed in the coating; the magnetic induction intensity is high, and the magnetic field change is quickly responded. The magnetic-responsive particles are Fe3O4One or more of carbonyl iron, nickel powder, ferrosilicon aluminum, etc., and the difference in materials is not intended to limit the present invention. The modifying substance is used for connecting the inorganic particles and the organic coating and is oilAcid, silane coupling agent, and the like.
And preparing the porous organic silicon film layer. The process comprises the following steps: adding the modified magnetic response particles into organic silicon resin, stirring to be homogeneous, adding a pore-forming agent, and stirring uniformly. In the process of curing and forming, the pore-forming agent is decomposed by heating to form a porous film layer.
The material selection and the process are characterized in that: the high molecular organosilicon film material needs to have good lipophilicity and hydrophobicity. The resin material of the structural film layer is one or more of PDMS, silicone resin, latex, silicone rubber, etc., and the difference of the materials should not be taken as a limitation of the present invention. The pore-forming agent can be selected from gaseous pore-forming agents, such as ammonium carbonate, ammonium bicarbonate, urea and the like; or volatile liquid such as liquid pore-forming agent acetone, toluene, tetrahydrofuran, etc. Mixing the pore-forming agent with resin, heating to the decomposition temperature or volatilization temperature of the pore-forming agent, and allowing the pore-forming substance to escape or form bubbles to be fixed in the film layer to form micro pores. The air holes are more at the bottom of the film layer and less at the upper part of the film layer. The internal porous structure provides sufficient space for oil storage, and the capillary force of the internal porous structure locks lubricating oil to prevent the lubricating oil from losing;
and preparing a micro-nano rough surface. The process comprises the following steps: and constructing a micro-nano rough structure on the outer surface of the prepared film layer by laser processing. When the surface is dry, it has a super-hydrophobic effect, and when the oil film secretes lubricating oil to fill the coarse structure, a smooth super-smooth surface is formed.
And (6) pouring lubricating oil. The process comprises the step of soaking the prepared porous organic silicon film layer in lubricating oil to enable the porous structure inside the porous organic silicon film layer to be filled with the lubricating oil.
The material selection and the process are characterized in that: the surface energy of the poured lubricating oil is low, the surface energy has good hydrophobicity, the viscosity is low, and the fluidity is good. The lubricating oil has good compatibility with the film forming material and can be stored in the coating for a long time. The optional material is one or more of silicone oil, perfluoropolyether oil, mineral oil, and the like. The lubricating oil is added with one or more auxiliary agents such as corrosion inhibitor, bactericide, anti-icing agent and the like, so that the functions of corrosion prevention, anti-icing, antifouling and the like of the coating are enhanced.
The invention develops a magnetic response dynamic coating, which can apply a magnetic field in time when lubricating oil on the surface of the coating is lost or the protective performance is poor according to the actual service requirement, drive magnetic particles to extrude a porous structure to secrete the lubricating oil, and provide a long-acting, controllable and intelligent ultra-smooth protective surface. Meanwhile, the coating generates physical vibration under the alternating magnetic field to form a dynamic surface, thereby further preventing biological adhesion. The secretion of the low-surface-energy lubricating oil and the vibration of the coating are cooperatively protected, so that the surface of the coating can be ensured to be in an ultra-smooth protection state for a long time, and corrosion of a corrosive medium is prevented; physical shock, etc. prevents surface fouling, biofouling, etc. The coating can realize long-acting excellent self-cleaning, corrosion-resistant and antifouling performances. The magnetic response dynamic coating has the advantages that the driving magnetic induction field intensity required by surface vibration is larger than 10Gs, and the vibration frequency is larger than 5 HZ. The time for applying the magnetic field is determined according to the thickness of the coating film and the secretion amount of the lubricating oil.
Drawings
FIG. 1 is a schematic structural diagram of a magnetic response dynamic coating
FIG. 2 is a schematic diagram showing the vibration of the prepared magnetic particle/dispersion mixture (magnetic fluid) under a magnetic field. (a) Magnetic fluid vibrating under static magnetic fluid (b) magnetic field
FIG. 3 is a magnetic response dynamic coating surface micro-topography. (a) The surface of the porous PDMS without oil filling (b) is flat after oil filling.
Detailed description of the preferred embodiments
The present invention will be further described with reference to the actual data, but the present invention is not limited thereto.
The preparation method of the magnetic response dynamic coating comprises the following steps:
example 1:
(1) magnetic particle modification
Mixing 10mL of ethanol with volume fraction of 92% and 0.1mL of silane coupling agent, stirring for 30min, and adding 1g of carbonyl iron powder with the particle size of 1200 meshes into the mixed solution after the solution is uniformly mixed and hydrolyzed. And introducing nitrogen to remove oxygen in the solution, and stirring in the nitrogen atmosphere to prevent the oxidation of the magnetic particles. Stirring at the rotating speed of 1200r/min for 6h, adsorbing carbonyl iron particles to the bottom of a beaker by using a magnet, pouring out supernatant, repeatedly washing with ethanol for three times, and drying the carbonyl iron particles in vacuum.
(2) Preparation of magnetically responsive porous substrates
Uniformly mixing 8g of PDMS and 6g of modified carbonyl iron, and uniformly stirring at 600r/min for 2 hours; 2g of ammonium carbonate is taken, ground, screened by a 300-mesh fine screen to obtain 0.5g of small-particle ammonium carbonate, and added with PDMS which is uniformly stirred. 0.3g of curing agent is added into the mixed PDMS, and the mixture is stirred for 1h at 600 r/min. The mixture is vacuumized for 0.5h in a vacuum box, poured into a mold, heated in a constant temperature furnace at 150 ℃ for 20min and taken out after curing. In the curing process, bubbles on the bottom escape slowly, bubbles on the upper layer escape quickly, and an internal porous film layer is formed. The bottom of the film layer is rich large bubbles, and the upper part is small bubbles.
(3) Superhydrophobic surface preparation
And taking out the prepared porous PDMS film layer, perforating by a picosecond laser, and processing the surface into a micro-nano coarse structure. Simultaneously, the connection between the inner air hole and the surface is opened. The processing method comprises the following steps: laser power 50W, circular spot size 10 μm, pitch 15 μm, vertical drilling.
(4) Pouring low surface energy lubricating oil
200mL of silicone oil and 0.5g of bactericide are uniformly mixed and placed in a vacuum box for 30min, and bubbles in the lubricating oil are removed. And (3) soaking the prepared porous organic silicon film layer in lubricating oil for 12 hours, and storing sufficient lubricating oil in the porous film layer to obtain the magnetic response dynamic coating.
Claims (7)
1. A preparation method of a magnetic response dynamic coating is characterized in that,
the coating comprises a porous organic silicon film layer, magnetic response particles and lubricating oil containing a corrosion inhibitor and a bactericide; the preparation process comprises the following steps:
1) modifying the magnetically responsive particles;
2) preparing a porous organic silicon film layer;
3) preparing a micro-nano rough surface;
4) pouring lubricating oil;
the organic silicon porous membrane layer is added with a pore-forming agent through a silicon resin system, the pore-forming agent is decomposed or volatilized in the curing process to form a micro-pore structure, and pores are distributed to be porous at the bottom of a small pore on the surface; preparing a rough surface of a micro-nano structure on the surface of the film layer through laser processing; under the action of external magnetic response, magnetic particles in the film layer vibrate to enable bubbles in the film to extrude and secrete lubricating oil, the surface of the coating keeps long-acting super-smoothness, and the coating is physically vibrated in cooperation with the surface of the coating, so that effective corrosion prevention and antifouling are realized.
2. The preparation method of the magnetic-response dynamic coating according to claim 1, wherein the preparation and modification method of the magnetic-response particles in step 1) is as follows: 10-15 g of carbonyl iron and 41-3 g of Fe3O are taken. The particle size of the magnetic particles is 20-50 mu m, and the magnetic induction intensity is 30-500 mT; taking ethanol: silane coupling agent: water is added according to the weight ratio of 5-10: 1-5: 80-90 (volume ratio), stirring for 10-30 min, adding 10-20 g of prepared magnetic particles, introducing nitrogen, stirring for 4-6 h at the rotating speed of 1000-1200 r/min, filtering out the magnetic particles, repeatedly washing with ethanol for three times, and drying carbonyl iron particles in vacuum at 50-80 ℃.
3. The method for preparing a magnetic-response dynamic coating according to claim 1, wherein the method for preparing the porous silicone membrane layer in step 2) comprises the following steps: selecting 8-10 g of organic silicon resin with the viscosity of 400-1000 cp, 1-2 g of curing agent, 0.5-0.8 g of toluene and 0.2-0.5 g of ammonium carbonate; grinding for 5-10 min by a mortar, sieving by a 800-mesh screen, mixing into a resin system, stirring for 10-20 min, and placing in a vacuum box for 30-40 min. Pouring the resin into a mold, and heating in a drying oven at 80-120 ℃ for 20-30 min; and decomposing and volatilizing the pore-forming agent in the resin curing process to form the porous organic silicon film layer.
4. The preparation method of the magnetic response dynamic coating according to claim 1, wherein the micro-nano rough surface processing method in step 3) comprises the following steps: selecting a picosecond or femtosecond laser processor, wherein the laser power is 20-50 w, the diameter of a light spot is 5-20 mu m, and the perforation distance is 5-30 mu m; and forming to obtain the film with micro-nano porous surface.
5. The preparation method of the magnetic response dynamic coating according to claim 1, characterized in that the lubricating oil perfusion method is as follows: selecting 100-200 g of silicone oil with surface tension of 15-30N/m and viscosity of 100-500 cp, taking 1-2 g of 8HQ, 1-1.5 g of BTA and 1-3 g of DCOIT, and mixing and stirring the silicone oil and the silicone oil for 30-60 min; and soaking the porous membrane layer in silicone oil, and placing the porous membrane layer in a vacuum box with the vacuum degree of 50-200 Pa for 60-120 min.
6. The method for preparing a magnetic response dynamic coating according to claim 1 or 2, wherein the magnetic response particles according to claim 2 are Fe3O4, carbonyl iron, nickel powder, iron silicon aluminum, and the modifying substance is one or more of oleic acid and silane coupling agent.
7. The method for preparing the magnetic response dynamic coating according to claim 1 or 3, wherein the silicone porous membrane layer is prepared from silicone rubber, PDMS and silicone resin; the pore-forming agent is selected from a gaseous pore-forming agent or a liquid pore-forming agent, the gaseous pore-forming agent is ammonium carbonate, ammonium bicarbonate and urea, and the liquid pore-forming agent is acetone, toluene and tetrahydrofuran.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111607271A (en) * | 2020-05-14 | 2020-09-01 | 中山大学 | Preparation method and application of metal organogel-filled organosilicon composite material |
| CN112409918A (en) * | 2020-10-30 | 2021-02-26 | 北京科技大学 | Magnetic response dynamic autocrine coating and preparation method and use method thereof |
| CN112708300A (en) * | 2020-12-28 | 2021-04-27 | 北京科技大学广州新材料研究院 | Water-based nano magnetic blackboard paint and preparation method thereof |
| CN113528010A (en) * | 2021-08-27 | 2021-10-22 | 电子科技大学 | Preparation and application of super-smooth coating with long-acting ice-thinning characteristic |
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| CN111607271B (en) * | 2020-05-14 | 2021-03-23 | 中山大学 | Preparation method and application of metal organogel-filled organosilicon composite material |
| CN112409918A (en) * | 2020-10-30 | 2021-02-26 | 北京科技大学 | Magnetic response dynamic autocrine coating and preparation method and use method thereof |
| CN112409918B (en) * | 2020-10-30 | 2022-02-08 | 北京科技大学 | Magnetic response dynamic autocrine coating and preparation method and use method thereof |
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