Rare earth doped slip pre-wetting coating for railway deicing and preparation method thereof

Abstract

The application provides a rare earth doped slip pre-wetting coating for railway deicing and a preparation method thereof, and comprises the following steps: (1) reacting rare earth nanoparticles with guanidine hydrochloride modified 1,10-dibromodecane under ultrasonic conditions, and obtaining modified rare earth nanoparticles after the reaction is completed; (2) uniformly mixing the modified rare earth nanoparticles with mixed resin and self-lubricating liquid, adding a functional additive thereto, and obtaining a mixed solution after uniform mixing; (3) adding a curing agent to the mixed solution, uniformly mixing, and then spraying the mixed solution to the surface of a device, and obtaining the rare earth doped slip pre-wetting coating for railway deicing after complete curing at room temperature. The rare earth nanoparticles in the rare earth doped slip pre-wetting coating for railway deicing have stronger photo-thermal conversion efficiency, and can realize temperature rising in a short time to quickly melt ice and remove ice.

Description

Technical Field

[0001] This invention belongs to the field of de-icing, and in particular relates to a rare earth-doped slippery pre-wetting coating for railway de-icing and its preparation method. Background Technology

[0002] Current anti-icing technologies typically utilize superhydrophobic surfaces, such as modified hydrophobic silica, to construct superhydrophobic surfaces and employ carbon materials for photothermal de-icing. These materials often exhibit the "lotus effect," which refers to the rough structure of a lotus leaf surface, discovered by Barthelot, consisting of a layer of fine hairs and tiny waxy particles. When rainwater falls on the leaf surface, it doesn't spread outwards due to these nanoscale particles but instead forms spheres due to surface tension. The contact angle between the water and the leaf surface is greater than 150 degrees, so even a slight tilt of the leaf will cause the water droplets to roll off. However, this rough structure is usually not suitable for long-term use, as the hydrophobic layer on its surface is easily damaged by the breaking and detachment of ice. During the anti-icing process, when water droplets fall onto a superhydrophobic surface exhibiting the "lotus effect," they roll off due to surface tension. However, this method is ineffective against supercooled water vapor that directly sublimates at low temperatures. Currently, commonly used photothermal materials generally have poor photothermal conversion efficiency. Under light source illumination, the heating rate is relatively slow, especially when the surface ice layer is thick.

[0003] Current technologies typically utilize carbon materials and superhydrophobic surfaces (SHP) to prevent condensation. The principle is to trap air on the nanomaterial surface, creating "air chambers" to delay water freezing. However, SHP is not effective in preventing icing in high-humidity environments. This is because textures are often present on non-smooth surfaces such as the bottom of high-speed trains or the connecting areas between carriages. Water vapor in these high-humidity environments condenses on the SHP texture, forming a Wenzel pattern. As the water vapor travels at high speeds, it sublimates, and this filling of the rough texture further strengthens the adhesion of ice. Therefore, SHP does not necessarily indicate ice repellency, especially in cases of rapid icing. Summary of the Invention

[0004] In view of this, the present invention aims to overcome the defects in the prior art and proposes a rare earth-doped slippery pre-wetting coating for railway de-icing and its preparation method.

[0005] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0006] A method for preparing a rare earth-doped slippery pre-wetting coating for railway de-icing includes the following steps:

[0007] (1) Rare earth nanoparticles were reacted with guanidine hydrochloride-modified 1,10-dibromodecane under ultrasonic conditions, and modified rare earth nanoparticles were obtained after the reaction was completed.

[0008] (2) The modified rare earth nanoparticles are mixed with mixed resin and self-lubricating liquid, and a functional additive is added thereto, and after being mixed uniformly, a mixed solution is obtained;

[0009] (3) A curing agent is added to the mixed solution, and after being mixed uniformly, it is sprayed onto the surface of a device, and after being completely cured at room temperature, the rare earth doped slip pre-wetting coating for railway deicing is obtained.

[0010] Further, the guanidine hydrochloride modified 1,10-dibromodecane in step (1) is prepared by the following steps: guanidine hydrochloride and 1,10-dibromodecane are dissolved in methanol, and then refluxed under heating, and after being washed, the guanidine hydrochloride modified 1,10-dibromodecane is obtained; the mass ratio of guanidine hydrochloride and 1,10-dibromodecane is 15-21:22-25; the temperature of the heating step is 65-70℃; and the refluxing step is performed for 24-36 hours. The acidic atmosphere in the system can react with the hydroxyl groups on the rare earth nanoparticles to form hydrophobically modified rare earth nanoparticles.

[0011] Further, the mass ratio of the rare earth nanoparticles to the guanidine hydrochloride modified 1,10-dibromodecane in step (1) is 35-40:34-39; the rare earth nanoparticles in step (1) are lanthanum hexaboride; the particle size of the rare earth nanoparticles in step (1) is 80-110 nm; and the reaction step in step (1) is performed for 6-8 hours.

[0012] The rare earth doped slip pre-wetting coating for railway deicing utilizes the photothermal effect of nanoscale rare earth borides, fully plays the synergistic effect of the slip pre-wetting surface and the photothermal coating for ice prevention, and realizes the ice prevention and deicing performance. The lanthanum hexaboride, which is a rare earth photothermal layer with photothermal effect, enhances the synergistic effect with the hydrophobic surface, and compared with carbon materials, the LSPR effect of the rare earth nanomaterial has higher light conversion efficiency, which makes the heat absorption efficiency stronger and the deicing effect better. At the same time, the preparation cost is lower, and the stability is better.

[0013] Further, the mass ratio of the modified rare earth nanoparticles to mixed resin, self-lubricating liquid, and functional additive in step (2) is 275-280:45-50:8-20:25-30.

[0014] Further, the self-lubricating liquid in step (2) is at least one of silicone oil, white oil or castor oil; the mixed resin in step (2) is at least one of silicone, fluorocarbon or epoxy resin. The self-lubricating liquid reduces the adhesion of ice by the super-hydrophobic pattern of the surface. The mixed resin better adheres the rare earth particles and the self-lubricating liquid on the railway device and the bogie, and the hydrophobic property of the resin can also bring excellent ice prevention effect.

[0015] Further, the functional additive in step (2) is at least one of ultraviolet absorber, light stabilizer, antioxidant or adhesion enhancer; the ultraviolet absorber is Good UV-1180; the antioxidant is V-990; the light stabilizer is carbon black; and the adhesion enhancer is Good 196. Good UV-1180 can absorb ultraviolet rays with a wavelength of 290-350 nm, has excellent anti-aging performance, and can improve the outdoor weather resistance of the epoxy product and delay the yellowing of the color. The light stabilizer mainly shields or absorbs the energy of ultraviolet rays, quenches singlet oxygen and decomposes hydrogen peroxide into non-active substances, etc., so that the coating slows down the photochemical reaction under the radiation of light and delays the photoaging process, thereby prolonging the service life. The antioxidant V-990 is better compatible with the system, and can eliminate free radicals, promote the decomposition of hydrogen peroxide, and prevent the chain reaction, so that the coating has a longer service life.

[0016] Further, the curing agent in step (3) is 13.16-14.6% of the mass of the mixed solution; and the curing time in step (3) is 8-12 hours.

[0017] The application further provides a railway deicing rare earth doped slip pre-wetting coating prepared by the preparation method.

[0018] The application further provides application of the railway deicing rare earth doped slip pre-wetting coating.

[0019] The railway deicing rare earth doped slip pre-wetting coating utilizes the photo-thermal effect of nanoscale rare earth borides, fully plays the synergistic effect of the slip pre-wetting surface and the photo-thermal coating for preventing ice, and realizes the ice prevention and deicing performance. The rare earth photo-thermal layer such as lanthanum hexaboride with photo-thermal effect enhances the synergistic effect with the hydrophobic surface, and compared with carbon materials, the LSPR effect of the rare earth nanomaterial has higher light conversion efficiency, so that the heat absorption efficiency is stronger and the deicing effect is better. At the same time, the preparation cost is lower and the stability is better.

[0020] The rare earth doped slip pre-wetting coating for railway deicing performs hydrophobic modification on the rare earth nanoparticles, and the modifier selected is 1, 10-dibromodecane modified by guanidine hydrochloride. The 1, 10-dibromodecane is pretreated by guanidine hydrochloride, and the hydroxyl group on the rare earth nanoparticles can be better combined with the acid environment than with halogen. Meanwhile, since guanidine hydrochloride is a molecule with antibacterial properties, when applied in the railway anti-icing and deicing coating, it can have excellent antistatic property, corrosion resistance and acid and alkali resistance, and is suitable for the long-term running environment of railway. This modified compound has excellent hydrophobic effect after modifying the rare earth nanoparticles due to the long alkyl chain, and the double-modified compound can react with 2 times the molar amount of rare earth nanoparticles, and the photothermal effect is more excellent than that of the single-modified system. In addition, no solvent is used during modification, but the solvent system of 1, 10-dibromodecane is used for the dissolution of rare earth nanoparticles; more importantly, unlike the traditional method which requires heating and solvent to react, the modification process only needs ultrasonic reaction at room temperature to be successful.

[0021] Compared with the prior art, the present application has the following advantages:

[0022] The rare earth doped slip pre-wetting coating for railway deicing has stronger photothermal conversion efficiency, can realize rapid ice melting and deicing in a short time; the rare earth nanoparticles are filled into the porous super-hydrophobic material to form a slip pre-wetting surface (SLIPS), which can effectively prevent ice spreading and reduce the supercooling temperature of the liquid to make water not easy to condense on the device, and the introduction of rare earth increases the synergistic effect of the slip pre-wetting surface, which has better effect than carbon materials in both ice prevention and deicing; meanwhile, the adhesion caused by the rough surface is improved, and the material can make the ice fall off due to its own gravity when there is a small inclination angle, and if there is still ice layer that has not been removed, the photothermal property of the rare earth particles can be used to realize rapid deicing in a short time; the water contact angle test method is used to evaluate the performance of the rare earth doped slip pre-wetting surface, and the water contact angle is 103°, which exceeds the industry standard of 90°, proving the excellent hydrophobic property.

[0023] The rare earth doped slip pre-wetting coating for railway deicing has excellent hydrophobic property of the slip pre-wetting surface (SLIPS), the self-lubricating liquid contained therein reduces the supercooling temperature of the supercooled liquid, so that water droplets or water vapor at the same temperature are less likely to condense on the surface, which can effectively prevent ice spreading; meanwhile, the introduction of rare earth quickly absorbs the energy of the sun, which on the one hand makes water vapor less likely to reach the supercooling temperature, and on the other hand reduces the deicing stress, so that the ice layer does not cover the surface of the photothermal layer to weaken the photothermal effect, and the synergistic effect between the slip pre-wetting surface and the rare earth particles in the ice prevention process is enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A photograph of the rare earth doped slippery pre-wetting coating described in Example 1 of the present application;

[0025] Figure 2 A schematic diagram of the hydrophobicity of the rare earth doped slippery pre-wetting coating described in Example 1 of the present application;

[0026] Figure 3 A water contact angle test diagram of the rare earth doped slippery pre-wetting coating described in Example 1 of the present application;

[0027] Figure 4 A temperature rise curve of the coating described in Example 1 and Comparative Example 1 of the present application (same light source and starting temperature);

[0028] Figure 5 A scanning electron microscope diagram of the guanidine hydrochloride pretreated rare earth doped slippery pre-wetting coating described in Example 1 of the present application;

[0029] Figure 6 A scanning electron microscope diagram of the rare earth doped slippery pre-wetting coating without guanidine hydrochloride pretreatment described in Comparative Example 2 of the present application;

[0030] Figure 7 A freezing rate curve of Example 1 and Comparative Examples 1-3 of the present application;

[0031] Figure 8 A thawing rate curve of Example 1 and Comparative Examples 1-3 of the present application. DETAILED DESCRIPTION

[0032] Unless otherwise defined, the technical terms used in the following examples have the same meanings as commonly understood by those skilled in the art to which the present application belongs. The test reagents used in the following examples are all conventional biochemical reagents unless otherwise specified; and the experimental methods described are all conventional methods unless otherwise specified.

[0033] The guanidine hydrochloride modified 1,10-dibromodecane in the examples and comparative examples described in the present application is prepared by the following steps: dissolving guanidine hydrochloride (20 g, 0.21 mol) and 1,10-dibromodecane (24 g, 0.08 mol) in methanol (100 mL), refluxing at 65-70°C for 24-36 hours, and then obtaining the guanidine hydrochloride modified 1,10-dibromodecane after multiple washes.

[0034] The present application will be described in detail below with reference to the examples.

[0035] Example 1

[0036] A method for preparing a rare earth doped slippery pre-wetting coating for railway deicing, comprising the following steps:

[0037] (1) Lanthanum hexaboride (3.8 g, 18.41 mmol) and guanidine hydrochloride modified 1,10-dibromodecane (3.7 g, 12.12 mmol) were reacted under ultrasonic for 6 hours using the solvent system itself to obtain modified rare earth nanoparticles;

[0038] (2) Mixed resin (fluorocarbon resin, epoxy resin and acrylic resin in a mass ratio of 7:9:1) (4.8 g, 0.14 mmol) and modified rare earth nanoparticles (27.6 g, 0.05 mol) were mixed uniformly with self-silicone oil 2000 (0.8 g, 1.81 mmol) under ultrasonic, and then guod UV-1180 (1.2 g, 3.35 mmol), carbon black (0.6 g, 0.85 mmol), antioxidant V-990 (0.4 g, 0.62 mmol), and guod 196 (0.4 g, 0.57 mmol) were added and mixed uniformly to obtain a mixed solution;

[0039] (3) Diethylene triamine (1.6 g, 19.49 mmol) was added to the mixed solution, and was uniformly sprayed onto the surface of the device using a spray gun. The sprayed device was placed at room temperature for 8-12 hours, and after complete curing, a rare earth doped slip pre-wetting coating for railway deicing was obtained, as shown in Figure 1 .

[0040] Example 2

[0041] A preparation method of a rare earth doped slip pre-wetting coating for railway deicing, comprising the following steps:

[0042] (1) Lanthanum hexaboride (3.8 g, 18.41 mmol) and guanidine hydrochloride modified 1,10-dibromodecane (3.7 g, 12.12 mmol) were reacted under ultrasonic for 6 hours using the solvent system itself to obtain modified rare earth nanoparticles;

[0043] (2) Mixed resin (fluorocarbon resin, epoxy resin and acrylic resin in a mass ratio of 7:9:1) (4.8 g, 0.14 mmol) and modified rare earth nanoparticles (27.6 g, 0.05 mol) were mixed uniformly with self-silicone oil 2000 (1.2 g, 2.71 mmol) under ultrasonic, and then guod UV-1180 (1.2 g, 3.35 mmol), carbon black (0.6 g, 0.85 mmol), antioxidant V-990 (0.4 g, 0.62 mmol), and guod 196 (0.4 g, 0.57 mmol) were added and mixed uniformly to obtain a mixed solution;

[0044] (3) to the mixed solution, add diethylene triamine (1.6 g, 19.49 mmol), and use a spray gun to evenly spray the mixture onto the surface of the device, and place the sprayed device at room temperature for 8-12 hours, and after complete solidification, a rare earth doped slippery pre-wetting coating for railway deicing is obtained.

[0045] Example 3

[0046] A method for preparing a rare earth doped slippery pre-wetting coating for railway deicing, comprising the following steps:

[0047] (1) react lanthanum hexaboride (3.8 g, 18.41 mmol) with guanidine hydrochloride modified 1,10-dibromodecane (3.7 g, 12.12 mmol) in the solvent system by itself under ultrasonic for 6 hours to obtain modified rare earth nanoparticles;

[0048] (2) mix the mixed resin (fluorocarbon resin, epoxy resin and acrylic resin in a molar ratio of 7:9:1) (4.8 g, 0.14 mmol) and the modified rare earth nanoparticles (27.6 g, 0.05 mol) and silicon oil 2000 (1.6 g, 3.62 mmol) uniformly under ultrasonic, add good UV-1180 (1.2 g, 3.35 mmol), carbon black (0.6 g, 0.85 mmol), antioxidant V-990 (0.4 g, 0.62 mmol), and good 196 (0.4 g, 0.57 mmol) uniformly to obtain a mixed solution;

[0049] (3) to the mixed solution, add diethylene triamine (1.6 g, 19.49 mmol), and use a spray gun to evenly spray the mixture onto the surface of the device, and place the sprayed device at room temperature for 8-12 hours, and after complete solidification, a rare earth doped slippery pre-wetting coating for railway deicing is obtained.

[0050] Example 4

[0051] A method for preparing a rare earth doped slippery pre-wetting coating for railway deicing, comprising the following steps:

[0052] (1) react lanthanum hexaboride (3.8 g, 18.41 mmol) with guanidine hydrochloride modified 1,10-dibromodecane (3.7 g, 12.12 mmol) in the solvent system by itself under ultrasonic for 6 hours to obtain modified rare earth nanoparticles;

[0053] (2) The mixed resin (fluorocarbon resin, epoxy resin and acrylic resin in a molar ratio of 7:9:1) (4.8 g, 0.14 mmol) and modified rare earth nanoparticles (27.6 g, 0.05 mol) and silicone oil 2000 (2.0 g, 4.52 mmol) were mixed uniformly under ultrasonic, and then good UV-1180 (1.2 g, 3.35 mmol), carbon black (0.6 g, 0.85 mmol), antioxidant V-990 (0.4 g, 0.62 mmol), and good 196 (0.4 g, 0.57 mmol) were added and mixed uniformly to obtain a mixed solution;

[0054] (3) Diethylene triamine (1.6 g, 19.49 mmol) was added to the mixed solution, and the mixture was uniformly sprayed onto the surface of the device using a spray gun. The sprayed device was placed at room temperature for 8-12 hours, and after complete curing, a rare earth doped slippery pre-wetting coating for railway deicing was obtained.

[0055] Comparative Example 1

[0056] A method for preparing a carbon composite material, comprising the following steps:

[0057] (1) The exfoliated graphite was suspended in a mixture of 75 ml of deionized water and PVA, and then mixed uniformly by magnetic stirring, with a PVA / water ratio of about 0.3;

[0058] (2) After stirring, the mixture was placed in an ultrasonic cleaner for 2 hours to improve the dispersibility of the graphite nanosheets in the liquid mixture;

[0059] (3) A 200 μm thick carbon composite material was obtained by evaporation casting, and then pressure annealing was performed at 120°C for 1 hour to obtain the carbon composite material.

[0060] Comparative Example 2

[0061] A method for preparing a rare earth doped slippery pre-wetting coating for railway deicing, comprising the following steps:

[0062] (1) Lanthanum hexaboride (3.8 g, 18.41 mmol) and 1,10-dibromodecane (3.7 g, 12.12 mmol) were reacted in the solvent system by themselves under ultrasonic for 6 hours to obtain modified rare earth nanoparticles;

[0063] (2) The mixed resin (fluorocarbon resin, epoxy resin and acrylic resin in a molar ratio of 7:9:1) (4.8 g, 0.14 mmol) and modified rare earth nanoparticles (27.6 g, 0.05 mol) were mixed uniformly with silicone oil 2000 (0.8 g, 1.81 mmol) under ultrasonic, and then good UV-1180 (1.2 g, 3.35 mmol), carbon black (0.6 g, 0.85 mmol), antioxidant V-990 (0.4 g, 0.62 mmol), and good 196 (0.4 g, 0.57 mmol) were added and mixed uniformly to obtain a mixed solution;

[0064] (3) Diethylene triamine (1.6 g, 19.49 mmol) was added to the mixed solution, and sprayed uniformly onto the surface of the device using a spray gun. The sprayed device was placed at room temperature for 8-12 hours, and the rare earth doped slippery pre-wetting coating for railway deicing was obtained after complete curing.

[0065] Comparative Example 3

[0066] A preparation method of a rare earth doped slippery pre-wetting coating for railway deicing, comprising the following steps:

[0067] (1) The mixed resin (fluorocarbon resin, epoxy resin and acrylic resin in a molar ratio of 7:9:1) (4.8 g, 0.14 mmol) and modified rare earth nanoparticles (27.6 g, 0.05 mol) were mixed uniformly with silicone oil 2000 (0.8 g, 1.81 mmol) under ultrasonic, and then good UV-1180 (1.2 g, 3.35 mmol), carbon black (0.6 g, 0.85 mmol), antioxidant V-990 (0.4 g, 0.62 mmol), and good 196 (0.4 g, 0.57 mmol) were added and mixed uniformly to obtain a mixed solution;

[0068] (2) Diethylene triamine (1.6 g, 19.49 mmol) was added to the mixed solution, and sprayed uniformly onto the surface of the device using a spray gun. The sprayed device was placed at room temperature for 8-12 hours, and the rare earth doped slippery pre-wetting coating for railway deicing was obtained after complete curing.

[0069] The hydrophobicity of the rare earth doped slippery pre-wetting coating obtained in Example 1 is shown in Figure 2 , the contact angle is shown in Figure 3 , and the temperature rise curve of Example 1 and Comparative Example 1 is shown in Figure 4 .

[0070] The comparative scanning electron microscope images of the rare earth doped slippery pre-wetting coating obtained in Example 1 and the guanidinium hydrochloride unmodified rare earth doped slippery pre-wetting coating obtained in Comparative Example 2 are shown in Figure 5The results are shown in Figure 1. It can be seen that the coating pretreated with guanidine hydrochloride has stronger adhesion under the same scale, because the guanidine hydrochloride group has good antistatic property and can promote the regular arrangement of molecules, thus maximizing the intermolecular distance, while the unpretreated coating is arranged irregularly and has a light and dark image.

[0071] The contact angle of the hydrophobic modified rare earth doped slippery pre-wetting coating is shown in Figure 2. The contact angle of the coating pretreated with guanidine hydrochloride is about 90°, while the contact angle of the coating pretreated with 1,10-dibromodecane is about 94°, which proves that the hydrophobicity is reduced, but only by 10° because of the coating of other resins. Figure 6

[0072] The hydrophobic ice prevention performance test curves of Example 1 and Comparative Examples 1-3 are shown in Figure 3. The ice drop experiment was carried out at the same low temperature, and it was found that the ice amount of the present application was the least, only 3 grams within 120 minutes, which proves that the present application has very excellent ice prevention performance. Figure 7

[0073] The heat absorption ice melting test curves of Example 1 and Comparative Examples 1-3 are shown in Figure 4. When the same initial ice amount on each coating is ensured, the irradiation was carried out under the same light source, and it can be seen that the heat absorption rate of Example 1 with the same amount of rare earth addition as Comparative Examples 2 and 3 does not change significantly, and rapid ice melting is achieved within 7 minutes, but the heat absorption efficiency of the carbon material in Comparative Example 1 is significantly reduced compared with that of the rare earth, and it takes more than 12 minutes to completely melt the ice, which confirms that the rare earth has better performance than other conventional materials in the field of heat absorption ice melting. Figure 8

[0074] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.​​​

Claims

1. A method for preparing a rare earth doped slip pre-wetting coating for deicing of railways, characterized by: It comprises the following steps: (1) reacting rare earth nanoparticles with guanidine hydrochloride modified 1,10-dibromodecane under ultrasonic conditions, and obtaining modified rare earth nanoparticles after the reaction is completed; (2) uniformly mixing the modified rare earth nanoparticles with mixed resin and self-lubricating liquid, adding functional additives thereto, and obtaining a mixed solution after uniform mixing; (3) adding a curing agent to the mixed solution, uniformly mixing, and then spraying it onto the surface of a device, and obtaining the rare earth doped slip pre-wetting coating for railway deicing after complete curing at room temperature. The rare earth nanoparticles in step (1) are lanthanum hexaboride.

2. The method of claim 1, wherein the method is characterized by: The guanidine hydrochloride modified 1,10-dibromodecane in step (1) is prepared by the following steps: dissolving guanidine hydrochloride and 1,10-dibromodecane in methanol, refluxing under heating conditions, and then obtaining the guanidine hydrochloride modified 1,10-dibromodecane after washing; the mass ratio of guanidine hydrochloride to 1,10-dibromodecane is 15-21:22-25; the temperature of the heating step is 65-70℃; and the refluxing step is performed for 24-36 hours.

3. The method of claim 1, wherein the method is characterized by: The mass ratio of the rare earth nanoparticles to the guanidine hydrochloride modified 1,10-dibromodecane in step (1) is 35-40:34-39; the particle size of the rare earth nanoparticles in step (1) is 80-110nm; and the reaction step in step (1) is performed for 6-8 hours.

4. The method of claim 1, wherein the method is characterized by: The mass ratio of the modified rare earth nanoparticles to the mixed resin, the self-lubricating liquid, and the functional additives in step (2) is 275-280:45-50:8-20:25-30.

5. The method of claim 1, wherein the method further comprises the step of: 5.

1. adding a dispersant to the mixture of step 1.

2. The self-lubricating liquid in step (2) is at least one of silicone oil, white oil, or castor oil; and the mixed resin in step (2) is at least one of organic silicon, fluorocarbon, or epoxy resin.

6. The method of claim 1, wherein the method is characterized by: The functional additives in step (2) are at least one of ultraviolet absorber, light stabilizer, antioxidant, or adhesion enhancer; the ultraviolet absorber is Good UV-1180; the antioxidant is V-990; the light stabilizer is carbon black; and the adhesion enhancer is Good 196.

7. The method of claim 1, wherein the method further comprises the step of: 5 applying a thin layer of a rare earth doped slip pre-wetting coating to the surface of the rail. The curing agent in step (3) is 13.16-14.6% of the mass of the mixed solution; and the curing step in step (3) is performed for 8-12 hours.

8. A rare earth doped slip pre-wetting coating for railway deicing prepared by the preparation method of any one of claims 1-7.

9. Use of a rare earth doped slip prewetting coating for deicing railroads as defined in claim 8, characterized in that: The application of the rare earth doped slip pre-wetting coating for railway deicing in the field of railway deicing.

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