CN110922893A - Hydrophobic self-cleaning anti-icing composite coating and preparation method thereof - Google Patents
Hydrophobic self-cleaning anti-icing composite coating and preparation method thereof Download PDFInfo
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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
- 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
- C09D183/08—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
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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
- C09D7/60—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
- C09D7/65—Additives macromolecular
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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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention discloses a hydrophobic self-cleaning anti-icing composite coating, which relates to the technical field of coatings and comprises the following raw materials in parts by weight: 5-10 parts of modified polytetrafluoroethylene wax emulsion, 1-5 parts of glass powder, 40-77 parts of modified organic silicon resin and 15-30 parts of solvent; the invention also discloses a preparation method thereof, which comprises the steps of adding glass powder into the modified organic silicon resin, and uniformly mixing; adding the modified polytetrafluoroethylene wax emulsion into the mixed solution, and uniformly mixing; and adding a solvent into the mixed solution, and uniformly mixing to obtain the composite coating. The invention has the advantages of hydrophobic self-cleaning effect, obvious delayed icing effect, reduced icing amount and easy deicing effect.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a hydrophobic self-cleaning anti-icing composite coating and a preparation method thereof.
Background
The icing disaster of the power transmission line is one of the most serious threats of the power system, and compared with other types of power grid accidents, the damage of the power grid caused by the icing disaster is more serious. On one hand, the accumulation of ice and snow changes the appearance structure of the insulator, particularly, the generation of ice and snow changes the leakage path of the edge surface of the insulator, so that the potential distribution on the surface of the insulator is changed, and simultaneously, the ice and snow are melted under the action of joule heat generated by leakage current, so that the surface of the insulator is polluted and wet, the surface resistance of the insulator is reduced, and the flashover voltage of the insulator is reduced. On the other hand, the ice coating of the line increases the weight of the wire, and the tension of the wire on the tower is unbalanced, so that accidents such as wire galloping, wire breakage, tower (pole) falling and even grid paralysis are caused.
In addition, when ice disasters occur, the emergency repair of the damaged power transmission line is very difficult due to severe weather conditions, so that the power grid has long power failure time, and huge economic loss is caused. In recent years, due to the influence of global warming, extreme weather frequently occurs, the probability of ice disaster accidents is increased, and the influence of ice disaster on the safety of a power grid is more obvious, so that the research on the ice coating prevention technology of the power transmission line is of great significance.
In recent years, there are generally two anti-icing design ideas for anti-icing coatings: one is to use a heat source to increase the temperature of the surface of the coated object to prevent supercooling and icing; the other is to minimize the bonding force between the ice and the substrate so that it can be easily detached and removed. Anti-icing coatings can be divided into the following 4 categories: (1) the coating comprises (1) an electrothermal coating, (2) a photo-thermal coating, (3) a hydrophobic coating, and (4) a super-hydrophobic bionic coating.
Chinese patent CN109486418A discloses an anti-icing coating, which comprises the following components in percentage by mass based on 100 percent by mass: 30-55% of organic silicon resin, 5-30% of fluorine-containing micro powder and the balance of additives. Chinese patent CN104098969AA discloses a coating with low surface energy and easy deicing and a preparation method thereof, the coating comprises a component A and a component B, wherein the component A comprises the following components in percentage by mass: 70-80% of fluorine modified acrylic resin, 78-4% of hydrophobic SiO22, 6-10% of microcrystal, 8-15% of filler and 2-3% of auxiliary agent; the component B is isocyanate trimer;
disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art: the hydrophobic self-cleaning composite coating and the preparation method thereof are provided, and the anti-icing performance of the power equipment is improved by the hydrophobic self-cleaning effect of the coating.
The technical solution of the first aspect of the invention is as follows:
a hydrophobic self-cleaning anti-icing composite coating comprises the following raw materials in parts by weight: 5-10 parts of modified polytetrafluoroethylene wax emulsion, 1-5 parts of glass powder, 40-77 parts of modified organic silicon resin and 15-30 parts of solvent.
As a preferred technical scheme, the silica gel also comprises fumed silica with the weight portion of 1-5.
As a preferred technical scheme, the feed also comprises the following raw materials in parts by weight: 1-5 parts of a dispersant; 0.5-2 parts of a defoaming agent; 0.5-3 parts of a leveling agent.
As a preferred technical scheme, the solvent is one or more of ethyl acetate, butyl acetate, n-butanol and propylene glycol methyl ether acetate.
As a preferred technical scheme, the modified polytetrafluoroethylene wax emulsion comprises the following raw materials in parts by weight: 5-10 parts of 1H,1H,2H, 2H-perfluorooctyl trichlorosilane, 5-10 parts of trifluoropropyl methyl cyclotrisiloxane and 75-90 parts of polytetrafluoroethylene wax emulsion.
As a preferred technical scheme, the modified polytetrafluoroethylene wax emulsion also comprises 0.5-5 parts by weight of polydimethylsiloxane.
As a preferred technical scheme, the modified organic silicon resin comprises the following raw materials in parts by weight: 5-10 parts of perfluorooctyl triethoxysilane, 70-75 parts of organic silicon resin and 15-25 parts of solvent; the solvent is one or more of ethyl acetate, butyl acetate, n-butanol and propylene glycol monomethyl ether acetate.
The technical solution of the second aspect of the invention is as follows:
a preparation method of a hydrophobic self-cleaning anti-icing composite coating comprises the following steps:
s1, adding glass powder and fumed silica into the modified organic silicon resin, and uniformly mixing;
s2, adding the modified polytetrafluoroethylene wax emulsion into the mixed solution obtained in the step S1, and uniformly mixing;
and S3, adding a solvent, a dispersing agent, a defoaming agent and a flatting agent into the mixed solution obtained in the step S2, and uniformly mixing to obtain the hydrophobic self-cleaning anti-icing composite coating.
As a preferred technical scheme, the preparation method of the modified organic silicon resin comprises the following steps: adding perfluorooctyl triethoxysilane and a solvent into organic silicon resin, uniformly mixing, heating to 65-75 ℃, preserving heat for 8-16 h, naturally cooling, and standing for 20-28 h.
As a preferred technical scheme, the preparation method of the modified polytetrafluoroethylene wax emulsion comprises the following steps: adding 1H,1H,2H, 2H-perfluorooctyl trichlorosilane, polydimethylsiloxane and trifluoropropyl methylcyclotrisiloxane into the polytetrafluoroethylene wax emulsion, dispersing for 6-10H at the temperature of 55-65 ℃, and naturally cooling.
The invention has the beneficial effects that:
in the components of the composite coating, the perfluoro octyl triethoxysilane modified organic silicon resin has fluorine atoms on the branched chain of the molecular chain, which can reduce the surface tension of the resin after drying, and the coating is prepared by adding a plurality of fluoro silane modified polytetrafluoroethylene wax emulsions into a coating system, and the modified polytetrafluoroethylene wax emulsion floats on the surface of the coating during spraying, thereby greatly reducing the surface energy of the coating, having the hydrophobic effect and simultaneously effectively inhibiting or delaying the formation of ice crystals on the surface of the material. Under the low-temperature freezing rain environment, the supercooled raindrops can be rapidly nucleated and crystallized when contacting the surface of the power equipment. Although the existing icing test methods are different, many test results at home and abroad show that the hydrophobic coating has certain icing hysteresis effect. The hydrophobic characteristic of this composite coating itself makes the drop of water difficult for staying on the substrate surface, can effectively reduce insulating surface's wetting degree, even be stained with the drop of water moreover, the drop of water can roll from the substrate surface under the exogenic action such as substrate angle slope or wind-blowing. Meanwhile, as the contact area between the condensed water drops on the surface of the hydrophobic material and the surface of the base material is smaller, the heat transfer between the surface of the base material and the condensed water drops is inhibited, and the freezing time of the condensed water drops on the surface of the hydrophobic material is prolonged when the supercooling degree is not too large, the invention adopts the modified polytetrafluoroethylene wax emulsion, the glass powder and the modified organic silicon resin. The weather silicon dioxide and other components have synergistic effect, so that the composite coating can show the characteristic of delaying frosting or icing to a certain extent.
When the composite coating is applied to the power equipment, dust cannot be attached to the surface of the coating of the power equipment, and meanwhile, the water on the surface of the coating can take away the dust on the surface layer; and when snowing, the coating has obvious time delay and freezes the effect, can significantly reduce the volume of icing, has the effect of easily deicing simultaneously, reduces the influence of ice and snow weather to power equipment, has improved electrical equipment's safety in utilization.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The solvent in the present invention can be selected from but not limited to ethyl acetate, butyl acetate, n-butanol, propylene glycol methyl ether acetate;
the silicone resin in the present invention is selected from, but not limited to, silicone resins manufactured by Nippon shiner under the types KR-212 and KR-300, and silicone resins manufactured by Dow Corning under the types RSN-0217 and RSN-0805.
The polytetrafluoroethylene wax emulsion in the present invention is selected from, but not limited to, the polytetrafluoroethylene wax emulsion manufactured by mu of the U.S. department of China, model number DISP 30, model number WB-T8408 manufactured by Ebo chemical materials Co., Ltd, of Dongguan, and model number XH-9060 manufactured by Asahi Yi Hua chemical Co., Ltd.
The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention.
Example 1
Weighing the following raw materials by weight: 5kg of modified polytetrafluoroethylene wax emulsion; 1kg of glass powder; 60kg of modified organic silicon resin; 15kg of solvent.
Wherein the solvent is ethyl acetate 5kg, butyl acetate 5kg, propylene glycol methyl ether acetate 5 kg.
The preparation method of the modified polytetrafluoroethylene wax emulsion comprises the following steps: weighing the following raw materials by weight: 6kg of 1H,1H,2H, 2H-perfluorooctyltrichlorosilane, 5kg of trifluoropropylmethylcyclotrisiloxane and 78kg of polytetrafluoroethylene wax emulsion (selected from DISP 30 in the embodiment); and then adding 1H,1H,2H, 2H-perfluorooctyl trichlorosilane and trifluoropropyl methyl cyclotrisiloxane into the polytetrafluoroethylene wax emulsion, dispersing for 6 hours at the temperature of 65 ℃ and the rotating speed of 1500r/min, and naturally cooling to obtain the modified polytetrafluoroethylene wax emulsion.
The preparation method of the modified organic silicon resin comprises the following steps: weighing the following raw materials by weight: 6kg of perfluorooctyltriethoxysilane, 72kg of silicone resin (selected from KR-212 in the present example), 0.5kg of polydimethylsiloxane, and 18kg of a solvent; the solvent is 10kg of ethyl acetate and 8kg of butyl acetate; adding perfluorooctyl triethoxysilane, a solvent and polydimethylsiloxane into the organic silicon resin, stirring at the rotation speed of 800r/min, heating to 75 ℃, preserving heat for 8h, naturally cooling, and standing for 28h to obtain the modified organic silicon resin.
The hydrophobic self-cleaning anti-icing composite coating is prepared according to the following method:
s1, adding glass powder and fumed silica into the modified organic silicon resin, and dispersing for 10-20min at a rotation speed of 1500r/min to uniformly mix;
s2, adding the modified polytetrafluoroethylene wax emulsion into the mixed solution obtained in the step S1, and dispersing for 10-20min at the rotating speed of 1500r/min to uniformly mix;
s3, adding ethyl acetate, butyl acetate, n-butanol and propylene glycol monomethyl ether acetate into the mixed solution obtained in the step S2, and dispersing for 10-20min at the rotation speed of 1500r/min to uniformly mix the mixture to obtain the hydrophobic self-cleaning anti-icing composite coating.
Example 2
Weighing the following raw materials by weight: 5kg of modified polytetrafluoroethylene wax emulsion; 5kg of glass powder; 40kg of modified organic silicon resin; 5kg of fumed silica; 25kg of solvent; 5kg of dispersing agent; 2kg of defoaming agent; 3kg of leveling agent.
Wherein the solvent is 15 parts of propylene glycol methyl ether acetate, 5 parts of n-butanol, 5 parts of ethyl acetate and 5 parts of butyl acetate.
The preparation method of the modified polytetrafluoroethylene wax emulsion comprises the following steps: weighing the following raw materials by weight: 7kg of 1H,1H,2H, 2H-perfluorooctyltrichlorosilane, 10kg of trifluoropropylmethylcyclotrisiloxane, 3kg of polydimethylsiloxane and 80kg of polytetrafluoroethylene wax emulsion (selected from DISP 30 in the embodiment); and then adding 1H,1H,2H, 2H-perfluorooctyl trichlorosilane, trifluoropropyl methyl cyclotrisiloxane and polydimethylsiloxane into the polytetrafluoroethylene wax emulsion, dispersing for 10 hours at the temperature of 55 ℃ and the rotating speed of 1500r/min, and naturally cooling to obtain the modified polytetrafluoroethylene wax emulsion.
The preparation method of the modified organic silicon resin comprises the following steps: weighing the following raw materials by weight: 10kg of perfluorooctyltriethoxysilane, 70kg of a silicone resin (selected from KR-212 in the present example), and 20kg of a solvent; the solvent is butyl acetate; adding perfluorooctyl triethoxysilane and a solvent into organic silicon resin, stirring at the rotation speed of 800r/min, heating to 65 ℃, preserving heat for 8 hours, naturally cooling, and standing for 28 hours to obtain the modified organic silicon resin.
The hydrophobic self-cleaning anti-icing composite coating is prepared according to the following method:
s1, adding glass powder and fumed silica into the modified organic silicon resin, and dispersing for 10-20min at a rotation speed of 1500r/min to uniformly mix;
s2, adding the modified polytetrafluoroethylene wax emulsion into the mixed solution obtained in the step S1, and dispersing for 10-20min at the rotating speed of 1500r/min to uniformly mix;
s3, adding a dispersing agent, a defoaming agent, a leveling agent, ethyl acetate, butyl acetate, n-butyl alcohol and propylene glycol methyl ether acetate into the mixed solution obtained in the step S2, and dispersing for 10-20min at a rotation speed of 1500r/min to uniformly mix the materials to obtain the hydrophobic self-cleaning anti-icing composite coating.
In the embodiment, the dispersing agent is propylene glycol block polyester, the defoaming agent is polyether modified silicon, and the leveling agent is acrylic acid.
Example 3
Weighing the following raw materials by weight: 8kg of modified polytetrafluoroethylene wax emulsion; 2kg of glass powder; 50kg of modified organic silicon resin; 4kg of fumed silica and 32kg of solvent; 2kg of dispersing agent; 1kg of defoaming agent; and 1kg of leveling agent.
Wherein the solvent is 10kg ethyl acetate, 7kg butyl acetate, 15kg propylene glycol methyl ether acetate.
The preparation method of the modified polytetrafluoroethylene wax emulsion comprises the following steps: weighing the following raw materials by weight: 5kg of 1H,1H,2H, 2H-perfluorooctyltrichlorosilane, 8kg of trifluoropropylmethylcyclotrisiloxane, 2kg of polydimethylsiloxane, and 85kg of polytetrafluoroethylene wax emulsion (selected from XH-9060 in this example). Adding 1H,1H,2H, 2H-perfluorooctyl trichlorosilane, polydimethylsiloxane and trifluoropropyl methylcyclotrisiloxane into the polytetrafluoroethylene wax emulsion, dispersing for 9H at the temperature of 58 ℃ and the rotating speed of 2000r/min, and naturally cooling to obtain the modified polytetrafluoroethylene wax emulsion.
The preparation method of the modified organic silicon resin comprises the following steps: weighing the following raw materials by weight: 5kg of perfluorooctyltriethoxysilane, 75kg of silicone resin (selected from KR-300 in the present example), and 20kg of solvent; the solvent was 20kg of butyl acetate; and then adding perfluorooctyl triethoxysilane and a solvent into the organic silicon resin, stirring at the rotation speed of 1000r/min, heating to 68 ℃, preserving heat for 10 hours, naturally cooling, and standing for 26 hours to obtain the modified organic silicon resin.
The hydrophobic self-cleaning anti-icing composite coating is prepared according to the following method:
s1, adding glass powder into the modified organic silicon resin, and dispersing for 10-20min at a rotating speed of 1500-3000 r/min to uniformly mix;
s2, adding the modified polytetrafluoroethylene wax emulsion into the mixed solution obtained in the step S1, and dispersing for 10-20min at the rotating speed of 1500-3000 r/min to uniformly mix;
s3, adding a solvent, a dispersing agent, a defoaming agent and a flatting agent into the mixed solution obtained in the step S2, and dispersing for 10-20min at the rotating speed of 1500-3000 r/min to uniformly mix the mixture to obtain the hydrophobic self-cleaning anti-icing composite coating.
In the embodiment, the dispersing agent is propylene glycol block polyester, the defoaming agent is polyether modified silicon, and the leveling agent is acrylic acid.
Example 4
Weighing the following raw materials by weight: 10kg of modified polytetrafluoroethylene wax emulsion; 3kg of glass powder; 65kg of modified organic silicon resin; 17kg of solvent; 2kg of fumed silica and 1kg of dispersant; 1kg of defoaming agent; and 1kg of leveling agent.
Wherein the solvent is propylene glycol methyl ether acetate 12kg and n-butanol 5 kg.
The preparation method of the modified polytetrafluoroethylene wax emulsion comprises the following steps: weighing the following raw materials by weight: 10kg of 1H,1H,2H, 2H-perfluorooctyltrichlorosilane, 10kg of trifluoropropylmethylcyclotrisiloxane and 75kg of polytetrafluoroethylene wax emulsion (selected from DISP 30 in the embodiment). Adding 1H,1H,2H, 2H-perfluorooctyl trichlorosilane and trifluoropropyl methyl cyclotrisiloxane into the polytetrafluoroethylene wax emulsion, dispersing for 8 hours at the temperature of 60 ℃ and the rotating speed of 2500r/min, and naturally cooling.
The preparation method of the modified organic silicon resin comprises the following steps: weighing the following raw materials by weight: 10kg of perfluorooctyl triethoxysilane, 75kg of silicone resin (selected from RSN-0217 in the embodiment) and 15kg of solvent; the solvent is 10kg of n-butyl alcohol and 5kg of propylene glycol methyl ether acetate; and then adding the perfluorooctyl triethoxysilane and the solvent into the organic silicon resin, stirring at the rotation speed of 1200r/min, heating to 70 ℃, preserving heat for 12h, naturally cooling, and standing for 24 h.
The hydrophobic self-cleaning anti-icing composite coating is prepared according to the following method:
s1, adding glass powder and fumed silica into the modified organic silicon resin, and dispersing for 10-20min at a rotating speed of 1500-3000 r/min to uniformly mix;
s2, adding the modified polytetrafluoroethylene wax emulsion into the mixed solution obtained in the step S1, and dispersing for 10-20min at the rotating speed of 1500-3000 r/min to uniformly mix;
s3, adding a solvent, a dispersing agent, a defoaming agent and a flatting agent into the mixed solution obtained in the step S2, and dispersing at the rotating speed of 1500-3000 r/min for 10-20min to uniformly mix the mixture to obtain the hydrophobic self-cleaning anti-icing composite coating.
In the embodiment, the dispersing agent is propylene glycol block polyester, the defoaming agent is polyether modified silicon, and the leveling agent is acrylic acid.
Example 5
Weighing the following raw materials by weight: 7kg of modified polytetrafluoroethylene wax emulsion; 4kg of glass powder; 77kg of modified organic silicon resin; 30kg of solvent; 3kg of fumed silica and 3kg of dispersing agent; 1.5kg of defoaming agent; and 2kg of leveling agent.
Wherein the solvent is 10kg ethyl acetate and 20kg propylene glycol methyl ether acetate.
The preparation method of the modified polytetrafluoroethylene wax emulsion comprises the following steps: weighing the following raw materials by weight: 9kg of 1H,1H,2H, 2H-perfluorooctyltrichlorosilane, 9kg of trifluoropropylmethylcyclotrisiloxane, 4kg of polydimethylsiloxane and 86kg of polytetrafluoroethylene wax emulsion. Adding 1H,1H,2H, 2H-perfluorooctyl trichlorosilane, polydimethylsiloxane and trifluoropropyl methylcyclotrisiloxane into the polytetrafluoroethylene wax emulsion, dispersing for 7H at the temperature of 62 ℃ and the rotating speed of 2800r/min, and naturally cooling.
The preparation method of the modified organic silicon resin comprises the following steps: weighing the following raw materials by weight: 8kg of perfluorooctyl triethoxysilane, 73kg of organic silicon resin and 25kg of solvent; the solvent is 15kg of butyl acetate and 10kg of propylene glycol methyl ether acetate; and then adding the perfluorooctyl triethoxysilane and the solvent into the organic silicon resin, stirring at the rotation speed of 1500r/min, heating to 75 ℃, preserving heat for 8 hours, naturally cooling, and standing for 28 hours.
The hydrophobic self-cleaning anti-icing composite coating is prepared according to the following method:
s1, adding glass powder and fumed silica into the modified organic silicon resin, and dispersing for 10-20min at a rotating speed of 1500-3000 r/min to uniformly mix;
s2, adding the modified polytetrafluoroethylene wax emulsion into the mixed solution obtained in the step S1, and dispersing for 10-20min at the rotating speed of 1500-3000 r/min to uniformly mix;
s3, adding a solvent, a dispersing agent, a defoaming agent and a flatting agent into the mixed solution obtained in the step S2, and dispersing at the rotating speed of 1500-3000 r/min for 10-20min to uniformly mix the mixture to obtain the hydrophobic self-cleaning anti-icing composite coating.
In the embodiment, the dispersing agent is propylene glycol block polyester, the defoaming agent is polyether modified silicon, and the leveling agent is acrylic acid.
The composite coatings prepared in examples 1-5 of the present invention were coated on the surface of glass, and the following properties were measured on the glass samples coated with the composite coatings, the test methods and results are shown in table 1 below:
TABLE 1
As can be seen from table 1, the contact angle of the coating formed by the composite coatings prepared in examples 1 to 5 is greater than 120 °, the delayed icing property is less than 50%, and the freeze-thaw cycle is greater than 120 °, and thus, the coating formed by the composite coatings prepared in examples 1 to 5 has hydrophobic self-cleaning and anti-icing effects, and the hydrophobic self-cleaning and anti-icing effects of example 5 are the best, so that dust cannot adhere to the surface of the coating of the composite coatings prepared in examples 1 to 5, water on the surface of the coating can also take away surface dust, and the coating also has an anti-icing function, and when in use, the amount of ice on the surface of the coating of the composite coating is greatly reduced, and the coating has an effect of easy deicing.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. The hydrophobic self-cleaning anti-icing composite coating is characterized by comprising the following raw materials in parts by weight: 5-10 parts of modified polytetrafluoroethylene wax emulsion, 1-5 parts of glass powder, 40-77 parts of modified organic silicon resin and 15-30 parts of solvent.
2. The hydrophobic self-cleaning anti-icing composite coating as claimed in claim 1, wherein: also comprises 1-5 parts of fumed silica by weight.
3. The hydrophobic self-cleaning anti-icing composite coating as claimed in claim 1, further comprising the following raw materials in parts by weight: 1-5 parts of a dispersant; 0.5-2 parts of a defoaming agent; 0.5-3 parts of a leveling agent.
4. The hydrophobic self-cleaning anti-icing composite coating as claimed in claim 1, wherein: the solvent is one or more of ethyl acetate, butyl acetate, n-butanol and propylene glycol monomethyl ether acetate.
5. The hydrophobic self-cleaning anti-icing composite coating as claimed in claim 1, wherein the modified polytetrafluoroethylene wax emulsion comprises the following raw materials in parts by weight: 5-10 parts of 1H,1H,2H, 2H-perfluorooctyl trichlorosilane, 5-10 parts of trifluoropropyl methyl cyclotrisiloxane and 75-90 parts of polytetrafluoroethylene wax emulsion.
6. The hydrophobic self-cleaning anti-icing composite coating as claimed in claim 5, wherein: the modified polytetrafluoroethylene wax emulsion also comprises 0.5-5 parts by weight of polydimethylsiloxane.
7. The hydrophobic self-cleaning anti-icing composite coating as claimed in claim 1, wherein the modified organic silicon resin comprises the following raw materials in parts by weight: 5-10 parts of perfluorooctyl triethoxysilane, 70-75 parts of organic silicon resin and 15-25 parts of solvent; the solvent is one or more of ethyl acetate, butyl acetate, n-butanol and propylene glycol monomethyl ether acetate.
8. A preparation method of a hydrophobic self-cleaning anti-icing composite coating is characterized by comprising the following steps:
s1, adding glass powder and fumed silica into the modified organic silicon resin, and uniformly mixing;
s2, adding the modified polytetrafluoroethylene wax emulsion into the mixed solution obtained in the step S1, and uniformly mixing;
and S3, adding a solvent, a dispersing agent, a defoaming agent and a flatting agent into the mixed solution obtained in the step S2, and uniformly mixing to obtain the hydrophobic self-cleaning anti-icing composite coating.
9. The hydrophobic self-cleaning anti-icing composite coating as claimed in claim 8, wherein: the preparation method of the modified organic silicon resin comprises the following steps: adding perfluorooctyl triethoxysilane and a solvent into organic silicon resin, uniformly mixing, heating to 65-75 ℃, preserving heat for 8-16 h, naturally cooling, and standing for 20-28 h.
10. The hydrophobic self-cleaning anti-icing composite coating as claimed in claim 8, wherein the preparation method of the modified polytetrafluoroethylene wax emulsion comprises the following steps: adding 1H,1H,2H, 2H-perfluorooctyl trichlorosilane, polydimethylsiloxane and trifluoropropyl methylcyclotrisiloxane into the polytetrafluoroethylene wax emulsion, dispersing for 6-10H at the temperature of 55-65 ℃, and naturally cooling.
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| CN111205766A (en) * | 2020-03-31 | 2020-05-29 | 国网河南省电力公司镇平县供电公司 | Environment-friendly self-ice-melting composition for overhead transmission line and preparation method thereof |
| CN111548696A (en) * | 2020-06-12 | 2020-08-18 | 中国铁道科学研究院集团有限公司金属及化学研究所 | Fireproof coating for steel structure surface and application thereof |
| CN113897134A (en) * | 2021-09-01 | 2022-01-07 | 国网江西省电力有限公司电力科学研究院 | Energy-absorbing super-hydrophobic super-oleophobic anti-icing coating for power transmission line and preparation method thereof |
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| CN111548696B (en) * | 2020-06-12 | 2022-01-07 | 中国铁道科学研究院集团有限公司金属及化学研究所 | Fireproof coating for steel structure surface and application thereof |
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