A super-hydrophobic anti-icing coating for transmission lines and a preparation method thereof

Abstract

The present invention discloses a super-hydrophobic anti-icing coating for transmission lines and a preparation method, and belongs to the technical field of anti-icing coating preparation. The super-hydrophobic anti-icing coating for transmission lines is composed of a coating wrapped on the surface of the transmission line, and the coating is composed of the following components in parts by weight: 34-45 parts of composite resin, 8-14 parts of composite ice-melting agent, 10-18 parts of deionized water, 1-3 parts of hexadecyltrimethoxysilane, 50-58 parts of tetrahydrofuran, wherein the composite resin is prepared by carboxyl multi-walled carbon nanotubes, isopropanol, tetraethyl orthosilicate, silane coupling agent KH-550, perfluorodecyltrimethoxysilane, butyl acrylate, methyl methacrylate and dodecafluoroheptyl methacrylate, and the composite ice-melting agent is prepared by pyridine-2,6-dicarboxylic acid, thionyl chloride and nicotinic acid hydrazide. The coating prepared by the method has excellent hydrophobicity, wear resistance and anti-icing effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of anti-icing coating preparation, and specifically relates to a super-hydrophobic anti-icing coating for transmission lines and a preparation method thereof. Background Art

[0002] Under low temperature conditions, especially when low-temperature precipitation falls on power lines below zero degrees, icing will occur, that is, power line icing. This is one of the most obvious disasters in the power supply system, which can cause composite insulator ice flash, load overload, line galloping, and even safety accidents such as line disconnection and tower collapse, seriously threatening the reliable operation of the power grid.

[0003] The causes of icing on transmission lines are complex and involve many factors, including climate distribution, meteorological conditions, geographical environment, and the nature of the conductors themselves. Therefore, in-depth research on anti-icing technology for transmission lines and finding effective anti-icing measures are of great significance to ensure the safe operation of the power grid.

[0004] Patent CN 115595023 B discloses an anti-icing coating for transmission lines, including an insulating-corrosion-resistant inner coating and a photothermal-electrical-superhydrophobic outer coating attached to the surface of the transmission line substrate from the inside to the outside, wherein the photothermal-electrical-superhydrophobic outer coating is composited with hydrophobically modified C / SiO2 filler, nano-piezoelectric particles, PVDF or its copolymer, and carbon nanotubes. The thickness of the insulating-corrosion-resistant inner coating is 50μm-80μm; the thickness of the photothermal-electrical-superhydrophobic outer coating is 200μm-500μm. The carbon nanotubes are multi-walled carbon nanotubes with a diameter of 10nm-30nm and a length of 10μm-20μm; the particle size of the nano-piezoelectric particles is 100nm-300nm. The anti-icing coating for transmission lines prepared by this invention can solve the problems of poor anti-icing effect and poor durability, but the super-hydrophobicity, wear resistance and anti-icing effect of the anti-icing coating for transmission lines prepared by this method still have room for improvement. Summary of the invention

[0005] The object of the present invention is to provide a super-hydrophobic anti-icing coating for transmission lines and a preparation method thereof, so as to solve the technical problems of poor super-hydrophobicity, wear resistance and anti-icing effect of the anti-icing coating in the prior art.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] The invention provides a super-hydrophobic anti-icing coating for a transmission line. The super-hydrophobic anti-icing coating for a transmission line is composed of a coating wrapped on the surface of the transmission line, and the coating is composed of the following components in parts by weight: 34-45 parts of a composite resin, 8-14 parts of a composite ice-melting agent, 10-18 parts of deionized water, 1-3 parts of hexadecyltrimethoxysilane, and 50-58 parts of tetrahydrofuran, wherein the composite resin is prepared from carboxyl multi-walled carbon nanotubes, isopropyl alcohol, tetraethyl orthosilicate, silane coupling agent KH-550, perfluorodecyltrimethoxysilane, butyl acrylate, methyl methacrylate and dodecafluoroheptyl methacrylate, and the composite ice-melting agent is prepared from pyridine-2,6-dicarboxylic acid, dichlorothionyl and nicotinic acid hydrazide.

[0008] Preferably, the method for preparing the composite resin comprises the following steps:

[0009] Q1: Add carboxyl multi-walled carbon nanotubes to a mixed solution of isopropanol and deionized water, stir and dissolve, add ammonia water and ultrasonically disperse, then slowly drop ethyl orthosilicate, heat to react, wash, centrifuge, vacuum dry, and grind after the reaction to obtain composite nanoparticles;

[0010] Q2: Add the composite nanoparticles into a container containing anhydrous ethanol, stir to obtain solution 1, add deionized water into the container, drop silane coupling agent KH-550, ultrasonically disperse to obtain solution 2, mix solution 1 and solution 2, then add perfluorodecyltrimethoxysilane, magnetically stir, centrifuge, wash, vacuum dry, grind, and obtain modified nanoparticles.

[0011] Q3: Butyl acrylate, methyl methacrylate, acrylic acid, hydroxyethyl methacrylate, dodecafluoroheptyl methacrylate, vinyltrimethoxysilane, xylene and azobisisobutyronitrile are added to a container, heated for reaction, and then modified nanoparticles and p-hydroxybenzenesulfonic acid are added. After sufficient stirring, the mixture is dried to obtain a composite resin.

[0012] In the above process, an in-situ growth method is adopted, with tetraethyl orthosilicate as a silicon source, to grow silicon dioxide on the surface of carboxyl multi-walled carbon nanotubes to prepare composite nanoparticles, and then silane coupling agent KH-550 and perfluorodecyltrimethoxysilane are used as modifiers to prepare modified nanoparticles, and then azobisisobutyronitrile is used as an initiator to initiate a monomer polymerization reaction to prepare a composite resin.

[0013] Preferably, in Q1, the amount ratio of carboxyl multi-walled carbon nanotubes, isopropanol, deionized water, ammonia water and tetraethyl orthosilicate is (0.5-1) g: (35-70) mL: (15-30) mL: (3.5-7) g: (4-8) g, the ultrasonic dispersion time is 10-15 min, the heating reaction temperature is 50-60°C, the reaction time is 10-12 h, the product is washed with deionized water and anhydrous ethanol, and the vacuum drying temperature is 70-80°C for 20-24 h.

[0014] Preferably, in Q2, the amount ratio of the composite nanoparticles, anhydrous ethanol, deionized water, silane coupling agent KH-550 and perfluorodecyltrimethoxysilane is (1-1.5) g: (100-150) mL: (100-150) mL: (0.08-0.12) g: (0.12-0.18) g, the stirring time is 10-20 min, the ultrasonic dispersion time is 10-20 min, the magnetic stirring time is 10-12 h, the product is washed with anhydrous ethanol, and the vacuum drying temperature is 80-90 ° C for 20-24 h.

[0015] Preferably, in Q3, the dosage ratio of butyl acrylate, methyl methacrylate, acrylic acid, hydroxyethyl methacrylate, dodecafluoroheptyl methacrylate, vinyltrimethoxysilane, xylene, azobisisobutyronitrile, modified nanoparticles and p-hydroxybenzenesulfonic acid is (13-26) g: (11-22) g: (0.2-0.4) g: (3.6-7.2) g: (0.4-0.8) g: (4-8) g: (13-26) g: (0.35-0.7) g: (4-8) g: (0.3-0.6) g, the heating reaction temperature is 100-120°C, the reaction time is 40-120 min, the sufficient stirring time is 60-75 min, the drying temperature is 40-60°C, and the time is 40-48 h.

[0016] Preferably, the method for preparing the composite ice-melting agent comprises the following steps:

[0017] S1: Pyridine-2,6-dicarboxylic acid is added to a container, thionyl chloride is added, and then N,N-dimethylformamide is added dropwise. The mixture is heated to reflux in an oil bath, and after the reflux is completed, the mixture is distilled under reduced pressure to obtain an intermediate product 1;

[0018] S2: Add nicotinic acid hydrazide to a container containing dichloromethane, stir at room temperature, add triethylamine after stirring and dissolving, dissolve the intermediate product 1 in dichloromethane and add it to the container, stir magnetically, filter, vacuum dry, recrystallize, wash, and dry to obtain a composite ice-melting agent.

[0019] In the above process, the synthesis reaction formula of the composite ice-melting agent is as follows:

[0020]

[0021] The results of mass spectrometry analysis of intermediate product 1 are: m / z: 202.95 (100.0%), 204.95 (63.9%), 206.95 (10.2%), 203.96 (7.7%), 205.95 (5.1%); the results of mass spectrometry analysis of the composite ice-melting agent are: m / z: 405.12 (100.0%), 406.12 (23.5%), 407.13 (2.1%), 407.12 (1.4%).

[0022] Preferably, in S1, the usage ratio of pyridine-2,6-dicarboxylic acid, dichlorothionyl and N,N-dimethylformamide is (3.34-6.68) g: (25-50) mL: (0.1-0.2) mL, the oil bath heating temperature is 70-80° C., and the reflux time is 4-6 h.

[0023] Preferably, in S2, the dosage ratio of nicotinic acid hydrazide, triethylamine and intermediate product 1 is (2.74-5.48) g: (3.5-7) mL: (2.04-4.08) g, the stirring time at room temperature is 35-40 min, triethylamine is added twice, first adding 83% volume, and then adding the rest, during the process of adding the intermediate product 1 solution, the ice bath environment is maintained throughout the process, the magnetic stirring time is 10-12 h, the vacuum drying temperature is 70-80 ° C, the time is 10-12 h, and the product is recrystallized using a mixed solution of anhydrous ethanol and deionized water in a volume ratio of 1:4.

[0024] Preferably, the method for preparing a super-hydrophobic anti-icing coating for a transmission line comprises the following steps:

[0025] Step 1: adding the composite resin, the composite ice-melting agent and hexadecyltrimethoxysilane into a container containing tetrahydrofuran, stirring and mixing them evenly to obtain a mixed material;

[0026] Step 2: Add the mixed material into deionized water and stir to obtain a coating, then immerse the transmission line in the coating, and obtain a super-hydrophobic anti-icing coating for the transmission line after curing.

[0027] Preferably, in the step 1, the stirring and mixing time is 3-5 hours; in the step 2, the stirring time is 1-3 hours.

[0028] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0029] 1. The present invention first uses carboxyl multi-walled carbon nanotubes, isopropyl alcohol, tetraethyl orthosilicate, silane coupling agent KH-550, perfluorodecyltrimethoxysilane, butyl acrylate, methyl methacrylate and dodecafluoroheptyl methacrylate to prepare a composite resin, then uses pyridine-2,6-dicarboxylic acid, dichlorothionyl and nicotinic acid hydrazide to prepare a composite ice-melting agent, mixes the composite resin with the composite ice-melting agent to prepare a coating, and solidifies the coating on the surface of the transmission line to obtain a super-hydrophobic anti-icing coating for the transmission line with excellent hydrophobicity, wear resistance and anti-icing performance.

[0030] 2. The present invention uses carboxyl multi-walled carbon nanotubes, isopropyl alcohol, tetraethyl orthosilicate, silane coupling agent KH-550, perfluorodecyl trimethoxy silane, butyl acrylate, methyl methacrylate and dodecafluoroheptyl methacrylate to prepare a composite resin. After silicon dioxide is grown on the surface of the carboxyl multi-walled carbon nanotubes, a nanostructure with a rough surface is formed. By introducing the silane coupling agent KH-550 and perfluorodecyl trimethoxy silane, a layer of fluoride segments with low surface energy is covered on the surface of the nanostructure. The combination of the low surface energy substance and the rough structure effectively reduces the contact angle between the water droplet and the coating surface, improves the ease of the water droplet rolling, and realizes super hydrophobicity. When the water droplet falls on the coating surface, due to the extremely low surface energy and the support of the rough structure, the water droplet cannot spread The carbon nanotubes in the composite resin can not only serve as a structural support, but also as a highly efficient photothermal energy conversion material. Under light conditions, the carbon nanotubes can efficiently convert the absorbed light energy into heat energy, thereby increasing the temperature of the coating surface. When the ambient temperature drops below the freezing point, the heat generated by the photothermal conversion effect on the coating surface can melt the tiny ice crystals that have formed, preventing the formation and growth of ice crystals. The presence of superhydrophobicity also makes it difficult for water droplets to stay and freeze on the coating surface, further enhancing the anti-icing effect. The modified nanoparticles in the composite resin enhance the overall strength and hardness of the coating, reduce the friction coefficient, reduce the wear rate, and improve its wear resistance.

[0031] 3. The present invention uses pyridine-2,6-dicarboxylic acid, dichlorothionyl and nicotinic acid hydrazide as raw materials to prepare a composite ice-melting agent, which is added to the coating to effectively improve the anti-icing performance of the coating. The amide bonds and pyridine rings in the composite ice-melting agent are tightly combined with the water molecules on the surface of the ice crystals through intermolecular interactions, which not only destroys the hydrogen bond network inside the ice crystals, but also promotes the penetration of the ice-melting agent molecules into the ice crystals, accelerating the melting of ice. At the same time, the amide bond has the characteristic of lowering the freezing point of water, making it easier for water added with the composite ice-melting agent to change from solid to liquid at the same temperature, thereby improving the ice-melting efficiency; and the introduction of the pyridine ring can improve the thermal conductivity of the ice-melting agent, promote the transfer of heat to the inside of the ice crystals, and further accelerate the melting of ice. The composite ice-melting agent can also form a protective film between water molecules or change the arrangement of water molecules to prevent the melted water from freezing again, thereby keeping the transmission line unobstructed and improving the safety of the power transmission process. DETAILED DESCRIPTION

[0032] The following will be described clearly and completely in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example 1: This example discloses a method for preparing a composite resin, comprising the following steps:

[0034] Q1: 0.75 g of carboxyl multi-walled carbon nanotubes were added to a mixed solution of 57.5 mL of isopropanol and 22.5 mL of deionized water. After stirring and dissolving, 5.25 g of ammonia water was added and ultrasonically dispersed for 15 min. Then 6 g of ethyl orthosilicate was slowly added dropwise and heated at 60 ° C for 12 h. After the reaction, the mixture was washed with deionized water and anhydrous ethanol, centrifuged, vacuum dried at 80 ° C for 24 h, and ground to obtain composite nanoparticles.

[0035] Q2: 1.25 g of composite nanoparticles were added to a container containing 125 mL of anhydrous ethanol, stirred for 20 min to obtain solution 1, 125 mL of deionized water was added to the container, 0.1 g of silane coupling agent KH-550 was added dropwise, ultrasonic dispersion was performed for 15 min to obtain solution 2, solution 1 and solution 2 were mixed, and then 0.15 g of perfluorodecyltrimethoxysilane was added, magnetic stirring was performed for 12 h, after stirring, centrifuged, washed with anhydrous ethanol, vacuum dried at 90 ° C for 24 h, and ground to obtain modified nanoparticles;

[0036] Q3: Add 20.5g of butyl acrylate, 16.5g of methyl methacrylate, 0.3g of acrylic acid, 5.2g of hydroxyethyl methacrylate, 0.6g of dodecafluoroheptyl methacrylate, 6g of vinyltrimethoxysilane, 20.5g of xylene and 0.47g of azobisisobutyronitrile into a container, heat at 100°C for reaction for 80min, add 6g of modified nanoparticles and 0.45g of p-hydroxybenzenesulfonic acid, stir thoroughly for 60min, and dry at 60°C for 48h to obtain a composite resin.

[0037] This embodiment discloses a method for preparing a composite ice-melting agent, comprising the following steps:

[0038] S1: 5.02 g of pyridine-2,6-dicarboxylic acid was added to a container, 37.5 mL of dichlorothionyl was added, and then 0.15 mL of N,N-dimethylformamide was added dropwise. The mixture was heated under reflux at 80°C in an oil bath for 6 h. After the reflux was completed, the mixture was distilled under reduced pressure to obtain an intermediate product 1.

[0039] S2: Add 4.01 g of nicotinic acid hydrazide to a container containing 100 mL of dichloromethane, stir at room temperature for 40 min, and after stirring and dissolving, add 5.25 mL of triethylamine (triethylamine is added in two batches, first adding 83% of the volume, and then adding the rest), dissolve 3.06 g of intermediate product 1 in 50 mL of dichloromethane and add to the container (maintain an ice bath environment throughout the addition process), magnetically stir for 12 h, filter, and vacuum dry at 80 ° C for 12 h. Use a mixed solution of anhydrous ethanol and deionized water in a volume ratio of 1:4 to recrystallize the product, wash, and dry to obtain a composite ice melting agent.

[0040] The present embodiment discloses a super-hydrophobic anti-icing coating for transmission lines, wherein the coating is composed of the following components in parts by weight: 39.5 parts of a composite resin, 11 parts of a composite ice-melting agent, 14 parts of deionized water, 2 parts of hexadecyltrimethoxysilane, and 54 parts of tetrahydrofuran.

[0041] This embodiment discloses a method for preparing a super-hydrophobic anti-icing coating for a transmission line, comprising the following steps:

[0042] Step 1: adding the composite resin, the composite ice-melting agent and hexadecyltrimethoxysilane into a container containing tetrahydrofuran, stirring and mixing for 5 hours to obtain a mixed material;

[0043] Step 2: Add the mixed material into deionized water and stir for 2 hours to obtain a coating, then immerse the transmission line in the coating, and obtain a super-hydrophobic anti-icing coating for the transmission line after curing.

[0044] Example 2: This example discloses a method for preparing a composite resin, comprising the following steps:

[0045] Q1: 0.5 g of carboxyl multi-walled carbon nanotubes were added to a mixed solution of 35 mL of isopropanol and 15 mL of deionized water. After stirring and dissolving, 3.5 g of ammonia water was added and ultrasonically dispersed for 15 min. Then 4 g of ethyl orthosilicate was slowly added dropwise and heated at 60 ° C for 12 h. After the reaction, the mixture was washed with deionized water and anhydrous ethanol, centrifuged, vacuum dried at 80 ° C for 24 h, and ground to obtain composite nanoparticles.

[0046] Q2: 1.5 g of composite nanoparticles were added to a container containing 100 mL of anhydrous ethanol, stirred for 20 min to obtain solution 1, 150 mL of deionized water was added to the container, 0.08 g of silane coupling agent KH-550 was added dropwise, ultrasonic dispersion was performed for 15 min to obtain solution 2, solution 1 and solution 2 were mixed, and then 0.12 g of perfluorodecyltrimethoxysilane was added, magnetic stirring was performed for 12 h, after stirring, centrifuged, washed with anhydrous ethanol, vacuum dried at 90 ° C for 24 h, and ground to obtain modified nanoparticles;

[0047] Q3: Add 13g of butyl acrylate, 11g of methyl methacrylate, 0.2g of acrylic acid, 3.6g of hydroxyethyl methacrylate, 0.4g of dodecafluoroheptyl methacrylate, 4g of vinyltrimethoxysilane, 13g of xylene and 0.35g of azobisisobutyronitrile into a container, heat at 100°C for reaction for 80min, add 4g of modified nanoparticles and 0.6g of p-hydroxybenzenesulfonic acid, stir thoroughly for 60min, and dry at 60°C for 48h to obtain a composite resin.

[0048] This embodiment discloses a method for preparing a composite ice-melting agent, comprising the following steps:

[0049] S1: 3.34 g of pyridine-2,6-dicarboxylic acid was added to a container, 25 mL of dichlorothionyl was added, and then 0.1 mL of N,N-dimethylformamide was added dropwise. The mixture was heated under reflux at 80°C in an oil bath for 6 h. After the reflux was completed, the mixture was distilled under reduced pressure to obtain an intermediate product 1.

[0050] S2: Add 2.74 g of nicotinic acid hydrazide to a container containing 100 mL of dichloromethane, stir at room temperature for 40 min, and after stirring and dissolving, add 3.5 mL of triethylamine (triethylamine is added in two batches, first adding 83% of the volume and then adding the rest), dissolve 2.04 g of intermediate product 1 in 50 mL of dichloromethane and add to the container (maintain an ice bath environment throughout the addition process), stir magnetically for 12 h, filter, and vacuum dry at 80 ° C for 12 h. Use a mixed solution of anhydrous ethanol and deionized water in a volume ratio of 1:4 to recrystallize the product, wash, and dry to obtain a composite ice melting agent.

[0051] The present embodiment discloses a super-hydrophobic anti-icing coating for transmission lines, wherein the coating is composed of the following components in parts by weight: 34 parts of a composite resin, 8 parts of a composite ice-melting agent, 10 parts of deionized water, 1 part of hexadecyltrimethoxysilane, and 50 parts of tetrahydrofuran.

[0052] This embodiment discloses a method for preparing a super-hydrophobic anti-icing coating for a transmission line, comprising the following steps:

[0053] Step 1: adding the composite resin, the composite ice-melting agent and hexadecyltrimethoxysilane into a container containing tetrahydrofuran, stirring and mixing for 5 hours to obtain a mixed material;

[0054] Step 2: Add the mixed material into deionized water and stir for 2 hours to obtain a coating, then immerse the transmission line in the coating, and obtain a super-hydrophobic anti-icing coating for the transmission line after curing.

[0055] Example 3: This example discloses a method for preparing a composite resin, comprising the following steps:

[0056] Q1: 1g of carboxyl multi-walled carbon nanotubes was added to a mixed solution of 70mL of isopropanol and 30mL of deionized water. After stirring and dissolving, 7g of ammonia water was added and ultrasonically dispersed for 15min. Then 8g of tetraethyl orthosilicate was slowly added dropwise and heated at 60℃ for 12h. After the reaction, it was washed with deionized water and anhydrous ethanol, centrifuged, vacuum dried at 80℃ for 24h, and ground to obtain composite nanoparticles.

[0057] Q2: 1 g of composite nanoparticles was added to a container containing 150 mL of anhydrous ethanol, stirred for 20 min to obtain solution 1, 100 mL of deionized water was added to the container, 0.12 g of silane coupling agent KH-550 was added dropwise, ultrasonic dispersion was performed for 15 min to obtain solution 2, solution 1 and solution 2 were mixed, and then 0.18 g of perfluorodecyltrimethoxysilane was added, magnetic stirring was performed for 12 h, after stirring, centrifuged, washed with anhydrous ethanol, vacuum dried at 90 ° C for 24 h, and ground to obtain modified nanoparticles;

[0058] Q3: Add 26g of butyl acrylate, 22g of methyl methacrylate, 0.4g of acrylic acid, 7.2g of hydroxyethyl methacrylate, 0.8g of dodecafluoroheptyl methacrylate, 8g of vinyltrimethoxysilane, 26g of xylene and 0.7g of azobisisobutyronitrile into a container, heat at 100°C for reaction for 80min, add 8g of modified nanoparticles and 0.3g of p-hydroxybenzenesulfonic acid, stir thoroughly for 60min, and dry at 60°C for 48h to obtain a composite resin.

[0059] This embodiment discloses a method for preparing a composite ice-melting agent, comprising the following steps:

[0060] S1: 6.68 g of pyridine-2,6-dicarboxylic acid was added to a container, 50 mL of dichlorothionyl was added, and then 0.2 mL of N,N-dimethylformamide was added dropwise. The mixture was heated under reflux at 80°C in an oil bath for 6 h. After the reflux was completed, the mixture was distilled under reduced pressure to obtain an intermediate product 1.

[0061] S2: Add 5.48 g of nicotinic acid hydrazide to a container containing 100 mL of dichloromethane, stir at room temperature for 40 min, and after stirring and dissolving, add 7 mL of triethylamine (triethylamine is added in two batches, first adding 83% of the volume, and then adding the rest), dissolve 4.08 g of intermediate product 1 in 50 mL of dichloromethane and add to the container (maintain an ice bath environment throughout the addition process), magnetically stir for 12 h, filter, and vacuum dry at 80 ° C for 12 h. Use a mixed solution of anhydrous ethanol and deionized water in a volume ratio of 1:4 to recrystallize the product, wash, and dry to obtain a composite ice-melting agent.

[0062] The present embodiment discloses a super-hydrophobic anti-icing coating for transmission lines, wherein the coating is composed of the following components in parts by weight: 45 parts of a composite resin, 14 parts of a composite ice-melting agent, 18 parts of deionized water, 3 parts of hexadecyltrimethoxysilane, and 58 parts of tetrahydrofuran.

[0063] This embodiment discloses a method for preparing a super-hydrophobic anti-icing coating for a transmission line, comprising the following steps:

[0064] Step 1: adding the composite resin, the composite ice-melting agent and hexadecyltrimethoxysilane into a container containing tetrahydrofuran, stirring and mixing for 5 hours to obtain a mixed material;

[0065] Step 2: Add the mixed material into deionized water and stir for 2 hours to obtain a coating, then immerse the transmission line in the coating, and obtain a super-hydrophobic anti-icing coating for the transmission line after curing.

[0066] Embodiment 4: This embodiment discloses a method for preparing a composite resin, comprising the following steps:

[0067] Q1: 0.6 g of carboxyl multi-walled carbon nanotubes were added to a mixed solution of 45 mL of isopropanol and 18 mL of deionized water. After stirring and dissolving, 4 g of ammonia water was added and ultrasonically dispersed for 15 min. Then, 5 g of ethyl orthosilicate was slowly added dropwise and heated at 60 ° C for 12 h. After the reaction, the mixture was washed with deionized water and anhydrous ethanol, centrifuged, vacuum dried at 80 ° C for 24 h, and ground to obtain composite nanoparticles.

[0068] Q2: 1.2 g of composite nanoparticles were added to a container containing 110 mL of anhydrous ethanol, stirred for 20 min to obtain solution 1, 120 mL of deionized water was added to the container, 0.09 g of silane coupling agent KH-550 was added dropwise, ultrasonic dispersion was performed for 15 min to obtain solution 2, solution 1 and solution 2 were mixed, and then 0.13 g of perfluorodecyltrimethoxysilane was added, magnetic stirring was performed for 12 h, after stirring, centrifuged, washed with anhydrous ethanol, vacuum dried at 90 ° C for 24 h, and ground to obtain modified nanoparticles;

[0069] Q3: Add 15g of butyl acrylate, 12g of methyl methacrylate, 0.25g of acrylic acid, 4g of hydroxyethyl methacrylate, 0.5g of dodecafluoroheptyl methacrylate, 5g of vinyltrimethoxysilane, 23g of xylene and 0.41g of azobisisobutyronitrile into a container, heat at 100°C for 80min, add 5g of modified nanoparticles and 0.4g of p-hydroxybenzenesulfonic acid, stir thoroughly for 60min, and dry at 60°C for 48h to obtain a composite resin.

[0070] This embodiment discloses a method for preparing a composite ice-melting agent, comprising the following steps:

[0071] S1: 4.12 g of pyridine-2,6-dicarboxylic acid was added to a container, 28 mL of dichlorothionyl was added, and then 0.11 mL of N,N-dimethylformamide was added dropwise. The mixture was heated under reflux in an oil bath at 80°C for 6 h. After the reflux was completed, the mixture was distilled under reduced pressure to obtain an intermediate product 1.

[0072] S2: Add 3.12 g of nicotinic acid hydrazide to a container containing 100 mL of dichloromethane, stir at room temperature for 40 min, and after stirring and dissolving, add 4.1 mL of triethylamine (triethylamine is added in two batches, first adding 83% of the volume, and then adding the rest), dissolve 2.55 g of intermediate product 1 in 50 mL of dichloromethane and add to the container (maintain an ice bath environment throughout the addition process), magnetically stir for 12 h, filter, and vacuum dry at 80 ° C for 12 h. Use a mixed solution of anhydrous ethanol and deionized water in a volume ratio of 1:4 to recrystallize the product, wash, and dry to obtain a composite ice-melting agent.

[0073] The present embodiment discloses a super-hydrophobic anti-icing coating for transmission lines, wherein the coating is composed of the following components in parts by weight: 38 parts of a composite resin, 10 parts of a composite ice-melting agent, 12 parts of deionized water, 2.5 parts of hexadecyltrimethoxysilane, and 52 parts of tetrahydrofuran.

[0074] This embodiment discloses a method for preparing a super-hydrophobic anti-icing coating for a transmission line, comprising the following steps:

[0075] Step 1: adding the composite resin, the composite ice-melting agent and hexadecyltrimethoxysilane into a container containing tetrahydrofuran, stirring and mixing for 5 hours to obtain a mixed material;

[0076] Step 2: Add the mixed material into deionized water and stir for 2 hours to obtain a coating, then immerse the transmission line in the coating, and obtain a super-hydrophobic anti-icing coating for the transmission line after curing.

[0077] Embodiment 5: This embodiment discloses a method for preparing a composite resin, comprising the following steps:

[0078] Q1: 0.8 g of carboxyl multi-walled carbon nanotubes were added to a mixed solution of 65 mL of isopropanol and 28 mL of deionized water. After stirring and dissolving, 6 g of ammonia water was added and ultrasonically dispersed for 15 min. Then 7 g of ethyl orthosilicate was slowly added dropwise and heated at 60 ° C for 12 h. After the reaction, the mixture was washed with deionized water and anhydrous ethanol, centrifuged, vacuum dried at 80 ° C for 24 h, and ground to obtain composite nanoparticles.

[0079] Q2: 1.4 g of composite nanoparticles were added to a container containing 130 mL of anhydrous ethanol, stirred for 20 min to obtain solution 1, 140 mL of deionized water was added to the container, 0.11 g of silane coupling agent KH-550 was added dropwise, ultrasonic dispersion was performed for 15 min to obtain solution 2, solution 1 and solution 2 were mixed, and then 0.16 g of perfluorodecyltrimethoxysilane was added, magnetic stirring was performed for 12 h, after stirring, centrifuged, washed with anhydrous ethanol, vacuum dried at 90 ° C for 24 h, and ground to obtain modified nanoparticles;

[0080] Q3: Add 23g of butyl acrylate, 20g of methyl methacrylate, 0.35g of acrylic acid, 6.9g of hydroxyethyl methacrylate, 0.7g of dodecafluoroheptyl methacrylate, 7g of vinyltrimethoxysilane, 15g of xylene and 0.58g of azobisisobutyronitrile into a container, heat at 100°C for reaction for 80min, add 7g of modified nanoparticles and 0.5g of p-hydroxybenzenesulfonic acid, stir thoroughly for 60min, and dry at 60°C for 48h to obtain a composite resin.

[0081] This embodiment discloses a method for preparing a composite ice-melting agent, comprising the following steps:

[0082] S1: 5.73 g of pyridine-2,6-dicarboxylic acid was added to a container, 45 mL of dichlorothionyl was added, and then 0.19 mL of N,N-dimethylformamide was added dropwise. The mixture was heated under reflux at 80°C in an oil bath for 6 h. After the reflux was completed, the mixture was distilled under reduced pressure to obtain an intermediate product 1.

[0083] S2: Add 4.19 g of nicotinic acid hydrazide to a container containing 100 mL of dichloromethane, stir at room temperature for 40 min, and after stirring and dissolving, add 6.8 mL of triethylamine (triethylamine is added in two batches, first adding 83% of the volume, and then adding the rest), dissolve 3.51 g of intermediate product 1 in 50 mL of dichloromethane and add to the container (maintain an ice bath environment throughout the addition process), magnetically stir for 12 h, filter, and vacuum dry at 80 ° C for 12 h. Use a mixed solution of anhydrous ethanol and deionized water in a volume ratio of 1:4 to recrystallize the product, wash, and dry to obtain a composite ice melting agent.

[0084] The present embodiment discloses a super-hydrophobic anti-icing coating for transmission lines, wherein the coating is composed of the following components in parts by weight: 42 parts of a composite resin, 13 parts of a composite ice-melting agent, 16 parts of deionized water, 1.5 parts of hexadecyltrimethoxysilane, and 56 parts of tetrahydrofuran.

[0085] This embodiment discloses a method for preparing a super-hydrophobic anti-icing coating for a transmission line, comprising the following steps:

[0086] Step 1: adding the composite resin, the composite ice-melting agent and hexadecyltrimethoxysilane into a container containing tetrahydrofuran, stirring and mixing for 5 hours to obtain a mixed material;

[0087] Step 2: Add the mixed material into deionized water and stir for 2 hours to obtain a coating, then immerse the transmission line in the coating, and obtain a super-hydrophobic anti-icing coating for the transmission line after curing.

[0088] Comparative Example 1: Compared with Example 1, in the process of preparing the composite resin in Comparative Example 1, no carboxyl multi-walled carbon nanotubes are added, and other conditions remain unchanged.

[0089] Comparative Example 2: Compared with Example 1, in the process of preparing the composite ice-melting agent in Comparative Example 2, nicotinic acid hydrazide is not added, and other conditions remain unchanged.

[0090] Comparative Example 3: Compared with Example 1, in the process of preparing the super-hydrophobic anti-icing coating for transmission lines in Comparative Example 3, epoxy resin is used instead of composite resin, and other conditions remain unchanged.

[0091] Comparative Example 4: Compared with Example 1, in the process of preparing the super-hydrophobic anti-icing coating for transmission lines in Comparative Example 4, no composite ice-melting agent is added, and other conditions remain unchanged.

[0092] Experimental example: The wear resistance of the sample was tested according to GB / T 1768-2006, and the contact angle of the sample was tested according to GB / T 30693-2014. The temperature rise after 180s of light exposure was measured by a thermometer. The temperature was measured at -5~-10℃, and 10mL of water was added to measure the icing condition. The test results are shown in Table 1:

[0093] Table 1

[0094]

[0095] It can be seen from the test results in Table 1 that the super-hydrophobic anti-icing coating for transmission lines prepared in Examples 1-5 of the present invention has excellent hydrophobicity, wear resistance and anti-icing properties. By comparing Comparative Example 1 with Examples 1-5, it can be seen that the addition of carboxyl multi-walled carbon nanotubes can effectively improve the hydrophobicity, wear resistance and anti-icing properties of the super-hydrophobic anti-icing coating for transmission lines; by comparing Comparative Example 2 with Examples 1-5, it can be seen that the addition of nicotinic acid hydrazide can effectively improve the anti-icing properties of the super-hydrophobic anti-icing coating for transmission lines; by comparing Comparative Example 3 with Examples 1-5, it can be seen that the use of composite resin can effectively improve the hydrophobicity, wear resistance and anti-icing properties of the super-hydrophobic anti-icing coating for transmission lines; by comparing Comparative Example 4 with Examples 1-5, it can be seen that the use of composite ice-melting agent can effectively improve the anti-icing properties of the super-hydrophobic anti-icing coating for transmission lines.

[0096] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0097] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A super-hydrophobic anti-icing coating for transmission lines, characterized in that: The super-hydrophobic anti-icing coating for transmission lines is composed of a coating wrapped on the surface of the transmission lines, and the coating is composed of the following components in parts by weight: 34-45 parts of a composite resin, 8-14 parts of a composite ice-melting agent, 10-18 parts of deionized water, 1-3 parts of hexadecyltrimethoxysilane, and 50-58 parts of tetrahydrofuran, wherein the composite ice-melting agent is prepared from pyridine-2,6-dicarboxylic acid, dichlorothionyl, and nicotinic acid hydrazide; The preparation method of the composite resin comprises the following steps: Q1: Add carboxyl multi-walled carbon nanotubes to a mixed solution of isopropanol and deionized water, stir and dissolve, add ammonia water and ultrasonically disperse, then slowly drop ethyl orthosilicate, heat to react, wash, centrifuge, vacuum dry, and grind after the reaction to obtain composite nanoparticles; Q2: Add the composite nanoparticles into a container containing anhydrous ethanol, stir to obtain solution 1, add deionized water into the container, drop silane coupling agent KH-550, ultrasonically disperse to obtain solution 2, mix solution 1 and solution 2, then add perfluorodecyltrimethoxysilane, magnetically stir, centrifuge, wash, vacuum dry, grind, and obtain modified nanoparticles. Q3: Butyl acrylate, methyl methacrylate, acrylic acid, hydroxyethyl methacrylate, dodecafluoroheptyl methacrylate, vinyltrimethoxysilane, xylene and azobisisobutyronitrile are added to a container, heated for reaction, and then modified nanoparticles and p-hydroxybenzenesulfonic acid are added. After sufficient stirring, the mixture is dried to obtain a composite resin.

2. The super-hydrophobic anti-icing coating for transmission lines according to claim 1, characterized in that: In the Q1, the amount ratio of carboxyl multi-walled carbon nanotubes, isopropanol, deionized water, ammonia water and tetraethyl orthosilicate is (0.5-1) g: (35-70) mL: (15-30) mL: (3.5-7) g: (4-8) g, the ultrasonic dispersion time is 10-15 min, the heating reaction temperature is 50-60° C., the reaction time is 10-12 h, the product is washed with deionized water and anhydrous ethanol, and the vacuum drying temperature is 70-80° C. for 20-24 h.

3. The super hydrophobic anti-icing coating for transmission lines according to claim 1, characterized in that: In the Q2, the amount ratio of the composite nanoparticles, anhydrous ethanol, deionized water, silane coupling agent KH-550 and perfluorodecyltrimethoxysilane is (1-1.5) g: (100-150) mL: (100-150) mL: (0.08-0.12) g: (0.12-0.18) g, the stirring time is 10-20 min, the ultrasonic dispersion time is 10-20 min, the magnetic stirring time is 10-12 h, the product is washed with anhydrous ethanol, and the vacuum drying temperature is 80-90° C. for 20-24 h.

4. The super-hydrophobic anti-icing coating for transmission lines according to claim 1, characterized in that: In Q3, the dosage ratio of butyl acrylate, methyl methacrylate, acrylic acid, hydroxyethyl methacrylate, dodecafluoroheptyl methacrylate, vinyltrimethoxysilane, xylene, azobisisobutyronitrile, modified nanoparticles and p-hydroxybenzenesulfonic acid is (13-26) g: (11-22) g: (0.2-0.4) g: (3.6-7.2) g: (0.4-0.8) g: (4-8) g: (13-26) g: (0.35-0.7) g: (4-8) g: (0.3-0.6) g, the heating reaction temperature is 100-120°C, the reaction time is 40-120 min, the sufficient stirring time is 60-75 min, the drying temperature is 40-60°C, and the time is 40-48 h.

5. The super hydrophobic anti-icing coating for transmission lines according to claim 1, characterized in that: The preparation method of the composite ice-melting agent comprises the following steps: S1: Pyridine-2,6-dicarboxylic acid was added to a container, followed by thionyl chloride, and then N,N-dimethylformamide was added dropwise, and the mixture was heated under reflux in an oil bath. After the reflux was completed, the mixture was distilled under reduced pressure to obtain an intermediate product 1; S2: Add nicotinic acid hydrazide to a container containing dichloromethane, stir at room temperature, add triethylamine after stirring and dissolving, dissolve the intermediate product 1 in dichloromethane and add it to the container, stir magnetically, filter, vacuum dry, recrystallize, wash, and dry to obtain a composite ice-melting agent.

6. The super-hydrophobic anti-icing coating for transmission lines according to claim 5, characterized in that: In the S1, the usage ratio of pyridine-2,6-dicarboxylic acid, dichlorothionyl and N,N-dimethylformamide is (3.34-6.68) g: (25-50) mL: (0.1-0.2) mL, the oil bath heating temperature is 70-80° C., and the reflux time is 4-6 h.

7. The super hydrophobic anti-icing coating for transmission lines according to claim 5, characterized in that: In the S2, the dosage ratio of nicotinic acid hydrazide, triethylamine and intermediate product 1 is (2.74-5.48) g: (3.5-7) mL: (2.04-4.08) g, the stirring time at room temperature is 35-40 min, triethylamine is added twice, first adding 83% volume, and then adding the rest, during the process of adding the intermediate product 1 solution, the ice bath environment is maintained throughout the process, the magnetic stirring time is 10-12 h, the vacuum drying temperature is 70-80 ° C, the time is 10-12 h, and the product is recrystallized using a mixed solution of anhydrous ethanol and deionized water in a volume ratio of 1:

4.

8. The method for preparing a super-hydrophobic anti-icing coating for a transmission line according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: adding the composite resin, the composite ice-melting agent and hexadecyltrimethoxysilane into a container containing tetrahydrofuran, stirring and mixing them evenly to obtain a mixed material; Step 2: Add the mixed material into deionized water and stir to obtain a coating, then immerse the transmission line in the coating, and obtain a super-hydrophobic anti-icing coating for the transmission line after curing.

9. The method for preparing a super-hydrophobic anti-icing coating for a transmission line according to claim 8, characterized in that: In the step 1, the stirring and mixing time is 3-5 hours; in the step 2, the stirring time is 1-3 hours.

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