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CN-118725722-B - Hydrophobic anti-icing wind power blade surface protection water-based paint and preparation method thereof

CN118725722BCN 118725722 BCN118725722 BCN 118725722BCN-118725722-B

Abstract

The invention discloses a hydrophobic anti-icing wind power blade surface protection water-based paint and a preparation method thereof, wherein the water-based paint comprises, by weight, 40-60 parts of fluorine-containing silicone polyurethane resin, 5-8 parts of polypyrrole grafted cellulose nanocrystalline, 15-20 parts of water, 0.5-3 parts of dispersing agent, 0.1-0.5 part of defoaming agent, 0.5-1 part of leveling agent, 10-15 parts of pigment and filler, 2-5 parts of ultraviolet light absorber, and the second part comprises isocyanate, polyether polyol and drier. The coating prepared from the fluorine-containing silicon polyurethane resin has good adhesive force with a substrate, and meanwhile, the coating has good hydrophobicity, the polypyrrole grafted cellulose nanocrystalline material is introduced, so that the water contact angle of the coating can be increased, the hydrophobicity of the coating is further increased, and further, the wind power blade is prevented from being covered with ice, the polypyrrole is a photo-thermal material, and the coating has a certain photo-thermal effect when sunlight irradiates, so that the deicing can be accelerated to be water-assisted deicing.

Inventors

  • XU DEZHONG
  • YANG BING
  • ZHANG XIAODONG

Assignees

  • 深圳市深赛尔股份有限公司

Dates

Publication Date
20260512
Application Date
20240628

Claims (9)

  1. 1. The hydrophobic ice-coating-preventing wind power blade surface protection water-based paint is characterized by comprising a component A and a component B, wherein the component A comprises, by weight, 40-60 parts of fluorine-containing silicon polyurethane resin, 5-8 parts of polypyrrole grafted cellulose nanocrystalline, 15-20 parts of water, 0.5-3 parts of a dispersing agent, 0.1-0.5 part of a defoaming agent, 0.5-1 part of a leveling agent, 10-15 parts of a pigment and filler and 2-5 parts of an ultraviolet light absorber; The component B comprises an isocyanate curing agent, polyether polyol and a drier, wherein the molar ratio of isocyanate groups to hydroxyl groups is (10-8) (2-3); the weight ratio of the component A to the component B is 1 (0.5-1); The fluorine-containing silicon polyurethane resin is prepared by the following steps: Adding 10-20 parts by weight of fluorine-containing dihydric alcohol, 10-30 parts by weight of hydroxyl-terminated polydimethylsiloxane, 30-40 parts by weight of polyether dihydric alcohol and 10-25 parts by weight of isocyanate into a reaction kettle at room temperature, heating to 60-90 ℃, reacting for 3-5h, adding 1-10 parts by weight of chain extender, and reacting for 2-4h to obtain the fluorine-containing silicon polyurethane resin; the polypyrrole grafted cellulose nanocrystalline is prepared according to the following steps: (1) Adding bromoalkane and NaOH into N, N-dimethylformamide, then adding pyrrole, stirring at room temperature for reaction for 24 hours, and purifying by column chromatography to obtain bromopyrrole; (2) Adding cellulose nanocrystals into N, N-dimethylformamide, adding bromopyrrole and NaOH, reacting at room temperature for 20 hours, and centrifuging and purifying to obtain pyrrole grafted cellulose nanocrystals; (3) Dispersing pyrrole grafted cellulose nanocrystals in water to form a solution, adding pyrrole and 0.1mol/L Fe 3+ aqueous solution into the solution, reacting for 6 hours at room temperature, enabling pyrrole in the solution and pyrrole on the surface of the cellulose nanocrystals to form polypyrrole under the catalytic oxidation of Fe 3+ , and then carrying out suction filtration and drying on the reaction solution to obtain the polypyrrole grafted cellulose nanocrystals.
  2. 2. The hydrophobic ice-coating-preventing wind power blade surface protection water-based paint according to claim 1, wherein the pigment and filler is titanium dioxide, the isocyanate curing agent is at least one of polymethylene polyphenyl polyisocyanate, hexamethylene diisocyanate and isophorone diisocyanate, and the polyether polyol is at least one of polytetrahydrofuran glycol, polycaprolactone glycol and polypropylene glycol.
  3. 3. The hydrophobic anti-icing wind power blade surface protection water paint according to claim 1, wherein the drier is at least one of dioctyltin dilaurate, dibutyl tin dilaurate and dibutyl tin diacetate, and the drier accounts for 0.1-0.5wt% of the component B.
  4. 4. The hydrophobic anti-icing wind power blade surface protection water-based paint according to claim 1, wherein in the preparation of the fluorine-containing silicon polyurethane resin, the number average molecular weight of the fluorine-containing dihydric alcohol ranges from 1000 to 4000 and is selected from one or more of polytrifluoroethylene glycol, polyvinyl fluoride glycol, polyvinylidene fluoride glycol, polyperfluoroethylene propylene glycol, ethylene-tetrafluoroethylene copolymer glycol, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer glycol and ethylene-chlorotrifluoroethylene copolymer glycol; The number average molecular weight of the hydroxyl-terminated polydimethylsiloxane ranges from 1000 to 4000; The number average molecular weight of the polyether glycol ranges from 1000 to 4000; The isocyanate is selected from one or more of 4,4 '-diphenylmethane diisocyanate, 2, 4-toluene diisocyanate, 2, 6-toluene diisocyanate, 1, 5-naphthalene diisocyanate, xylylene diisocyanate, tetramethylxylylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate and 4,4' -dicyclohexylmethane diisocyanate; the chain extender is selected from one or more of ethylene glycol, propylene glycol, 1, 4-butanediol, 1, 4-cyclohexanediol, diethylene glycol, neopentyl glycol and 1, 6-hexanediol.
  5. 5. The hydrophobic ice-coating-preventing wind power blade surface protection water-based paint according to claim 1, wherein in the preparation of the polypyrrole grafted cellulose nanocrystalline, the bromoalkane is one or more of dibromomethane, 1, 5-dibromopentane, 1, 10-dibromodecane, 1, 4-dibromobutane and 1, 12-dibromododecane.
  6. 6. The hydrophobic ice-coating-preventing wind power blade surface protection water-based paint according to claim 1, wherein in the preparation of the polypyrrole grafted cellulose nanocrystalline, the amount of NaOH in the step (1) is 50-80% of the mass of bromoalkane, and the mass ratio of bromoalkane to pyrrole is 8:1-4:3.
  7. 7. The hydrophobic ice-coating-preventing wind power blade surface protection water-based paint according to claim 1, wherein in the preparation of the polypyrrole grafted cellulose nanocrystals, the amount of NaOH in the step (2) is 50-80% of the mass of the bromopyrrole, and the mass ratio of the bromopyrrole to the cellulose nanocrystals is 5:2-4:3.
  8. 8. The hydrophobic ice-coating-preventing wind power blade surface protection water-based paint according to claim 1, wherein in the preparation of the polypyrrole grafted cellulose nanocrystalline, in the step (3), pyrrole grafted cellulose nanocrystalline is dispersed in water to prepare a solution with the concentration of 5-10wt%, and the concentration of the added pyrrole in the solution is 0.5-1.5wt%, and the addition amount of the 0.1mol/L Fe 3+ aqueous solution is 10-15% of the volume of the solution.
  9. 9. The preparation method of the hydrophobic anti-icing wind power blade surface protection water paint disclosed in claim 1 is characterized by comprising the following steps: s1, uniformly mixing fluorine-containing silicon polyurethane resin, polypyrrole grafted cellulose nanocrystals, water, a dispersing agent and pigment and filler, grinding, then adding a defoaming agent, a leveling agent and an ultraviolet light absorbent, and continuously uniformly mixing to obtain a component A; S2, adding an isocyanate curing agent, polyether polyol and a drier into a reaction kettle, stirring and reacting for 4-5 hours at 70-80 ℃, and cooling to obtain a component B; s3, fully and uniformly mixing the component A and the component B according to a proportion.

Description

Hydrophobic anti-icing wind power blade surface protection water-based paint and preparation method thereof Technical Field The invention belongs to the technical field of coatings, and particularly relates to a hydrophobic anti-icing wind power blade surface protection water-based coating and a preparation method thereof. Background Wind is one of pollution-free energy sources, and is inexhaustible. The wind power generation device is very suitable for coastal islands, grassland pasture areas, mountain areas and plateau areas which are lack of water, fuel and inconvenient in transportation, and can be widely used according to local conditions. Offshore wind power is an important field of renewable energy development, is an important force for promoting the progress of wind power technology and the industrial upgrading, and is an important measure for promoting the adjustment of energy structure. The Chinese offshore wind energy resource is rich, the construction of the offshore wind power project is quickened, and the method has important significance for promoting the treatment of atmospheric haze in coastal areas, adjusting the energy structure and transforming the economic development mode. Wind power generation is typically located in islands, grassland pastures, mountainous areas, deserts, and plateau areas. In high altitude and high latitude areas, the temperature is lower, the phenomenon that the outdoor temperature is lower than zero is very common, and in general, the blade of the fan equipment generates ice coating due to the fact that water drops are adhered in a large amount, the ice coating can damage the aerodynamic performance of the blade airfoil, increase the fan load, damage the fatigue of the dynamic balance acceleration component of the fan and the like, and the power generation efficiency is reduced. Therefore, the problems of ice prevention and deicing also become a technical problem to be solved in the wind power field. The adoption of the surface coating for preventing icing has great advantages in the aspects of application range, construction cost and the like, and on the basis of the great advantages, the development of the hydrophobic anti-icing wind power blade surface protective coating is necessary. Disclosure of Invention In order to overcome the defects and shortcomings in the prior art, the primary purpose of the invention is to provide the hydrophobic anti-icing wind power blade surface protection water-based paint. The invention further aims to provide a preparation method of the hydrophobic anti-icing wind power blade surface protection water-based paint. The aim of the invention is achieved by the following technical scheme: The hydrophobic ice-coating-preventing wind power blade surface protection water-based paint comprises a component A and a component B, wherein the component A comprises, by weight, 40-60 parts of fluorine-containing silicone polyurethane resin, 5-8 parts of polypyrrole grafted cellulose nanocrystalline, 15-20 parts of water, 0.5-3 parts of a dispersing agent, 0.1-0.5 part of a defoaming agent, 0.5-1 part of a leveling agent, 10-15 parts of a pigment and filler and 2-5 parts of an ultraviolet light absorber; The component B comprises an isocyanate curing agent, polyether polyol and a drier, wherein the molar ratio of isocyanate groups to hydroxyl groups is (10-8) (2-3); The weight ratio of the component A to the component B is 1 (0.5-1). Further, the fluorosilicone polyurethane resin is prepared according to the following steps: based on the weight parts of fluorine-containing dihydric alcohol, 10-20 weight parts of fluorine-containing dihydric alcohol, 10-30 weight parts of hydroxyl-terminated polydimethylsiloxane, 30-40 weight parts of polyether dihydric alcohol and 10-25 weight parts of isocyanate are added into a reaction kettle at room temperature, the temperature is raised to 60-90 ℃, the reaction is carried out for 3-5 hours, then 1-10 weight parts of chain extender is added, and the reaction is carried out for 2-4 hours, thus obtaining the fluorine-containing silicon polyurethane resin. Further, the polypyrrole grafted cellulose nanocrystalline is prepared according to the following steps: (1) Adding bromoalkane and NaOH into N, N-dimethylformamide, then adding pyrrole, stirring at room temperature for reaction for 24 hours, and purifying by column chromatography to obtain bromopyrrole; (2) Adding cellulose nanocrystals into N, N-dimethylformamide, adding bromopyrrole and NaOH, reacting at room temperature for 20 hours, and centrifuging and purifying to obtain pyrrole grafted cellulose nanocrystals; (3) Dispersing pyrrole grafted cellulose nanocrystals in water to prepare a solution, adding pyrrole and 0.1mol/L Fe 3+ aqueous solution into the solution, reacting for 6 hours at room temperature, enabling pyrrole in the solution and pyrrole on the surface of the cellulose nanocrystals to form polypyrrole under the catalytic oxidation of Fe 3+,