A multifunctional coating material with superhydrophilicity and its preparation method

Abstract

The present invention relates to the technical field of hydrophilic materials, and specifically to a multifunctional coating material with superhydrophilicity and a preparation method thereof; the multifunctional coating material is composed of the following raw materials in parts by weight: 30-40 parts of polyurethane resin, 3-6 parts of functional additives, 3-5 parts of synergistic additives, 2-4 parts of surfactant, 4-7 parts of sodium dodecyl sulfate, 4-7 parts of sodium dodecylbenzenesulfonate and 50-60 parts of water; by placing the polyurethane resin, functional additives, synergistic additives, sodium dodecyl sulfate, sodium dodecylbenzenesulfonate and water in a mixing device for mixing, then adding the surfactant for treatment, discharging the mixture after mixing is completed, and then passing inspection and metering, finally obtaining the finished product of the multifunctional coating material with superhydrophilicity; the multifunctional coating material with superhydrophilicity prepared by the present invention not only has good superhydrophilicity performance, but also has excellent antibacterial and aging resistance performances, effectively ensuring its quality and quality.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrophilic materials, and specifically provides a multifunctional coating material with superhydrophilicity and a preparation method thereof. Background Art

[0002] Coating materials play a key role in many fields. In the construction field, the exterior wall coatings of buildings can perform dual functions of decoration and protection, preventing the damage of building materials caused by rain erosion and ultraviolet radiation, and extending the service life of building materials. In the automotive industry, automotive coatings can not only make the appearance of cars more beautiful, but also resist the corrosion of the vehicle body by environmental factors such as acid rain and sand. In the field of electronic devices, coatings can be used for the protection of circuit boards to prevent pollutants such as moisture and dust from affecting the performance of electronic components.

[0003] In the patent document with the application number "CN201810671465.8" and the name "A superhydrophilic coating agent and its preparation method", it is recorded that "The superhydrophilic coating agent of the present invention contains the following components: resin, hydrophilic surfactant, modified nanoparticles, leveling agent, dispersant, and solvent. The superhydrophilic coating agent of the present invention can make the surface of the substrate rough, which is more conducive to the spreading of water and has better hydrophilicity. At the same time, it also has the advantages of being ultra-thin, high hardness, erosion-resistant, and fast film-forming. The process conditions required for the method for preparing the superhydrophilic coating agent provided by the present invention are low, the operation is simple, and ultraviolet curing is not required."

[0004] Although the coating material manufactured by the above patent document has certain hydrophilic and other advantages, its antibacterial and anti-aging properties are relatively insufficient and still need to be further improved. Based on this, the present invention provides a multifunctional coating material with superhydrophilicity and a preparation method thereof to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a multifunctional coating material with superhydrophilicity and a preparation method thereof. The prepared multifunctional coating material with superhydrophilicity not only has good superhydrophilicity performance, but also has excellent antibacterial and anti-aging properties, effectively ensuring its quality and quality.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] The first aspect of the present invention: provides a multifunctional coating material with superhydrophilicity, which is composed of the following raw materials in parts by weight: 30-40 parts of polyurethane resin, 3-6 parts of functional additives, 3-5 parts of synergistic additives, 2-4 parts of surfactant, 4-7 parts of sodium dodecyl sulfate, 4-7 parts of sodium dodecylbenzenesulfonate, and 50-60 parts of water.

[0008] A further setting of the present invention is as follows: The preparation process of the functional auxiliary is as follows:

[0009] Ethyl orthosilicate is placed in absolute ethanol according to a mass ratio of 1:2.8 - 3.2, and stirred and mixed at 55 - 58 °C and 100 - 120 r / min for 10 - 15 min. Then, a compound solution, ammonia water with a concentration of 25%, and eugenol are added to the obtained mixed solution, and stirring is continued for 5 - 8 min, and heat preservation treatment is carried out for 8 - 10 h;

[0010] Then, after centrifugation at a rotation speed of 5200 - 5400 r / min for 20 - 25 min, the obtained centrifugation product is washed 2 - 4 times with absolute ethanol, dried and ground to obtain the functional auxiliary.

[0011] A further setting of the present invention is as follows: The first compound solution is formed by mixing γ-aminopropyltriethoxysilane and water according to a mass ratio of 1:12 - 14, and the addition amount of the first compound solution is 2.5 - 4.2% of the mass of the mixed solution.

[0012] A further setting of the present invention is as follows: The addition amount of the ammonia water is 2.8 - 3.5% of the mass of the mixed solution, and the addition amount of the eugenol is 1.8 - 3.1% of the mass of the mixed solution.

[0013] A further setting of the present invention is as follows: The preparation process of the synergistic auxiliary is as follows:

[0014] Aluminum chloride hexahydrate is put into deionized water according to a dosage ratio of 0.8 - 1.2 g / mL, and stirred for 20 - 30 min under the condition of 120 - 220 r / min. Then, the pretreated hollow carbon nanospheres are added thereto, and treated under the condition of 7000 - 8000 r / min for 40 - 46 min;

[0015] Then, the pH is adjusted to 8.8 - 9.2 with ammonia water, and after suction filtration, it is washed to neutrality, dried, placed in a nitrogen atmosphere, and treated under the condition of 880 - 900 °C for 14 - 16 h, and after cooling, the functional auxiliary is obtained.

[0016] A further setting of the present invention is as follows: The preparation process of the pretreated hollow carbon nanospheres is as follows:

[0017] The hollow carbon nanospheres are placed in the treatment solution according to a dosage ratio of 0.05 - 0.15 g / mL and ultrasonically treated for 20 - 30 min;

[0018] After suction filtration, it is dried and placed under the condition of 540 - 550 °C for 100 - 120 min to obtain the pretreated hollow carbon nanospheres;

[0019] Among them, the treatment solution is formed by mixing a nitric acid solution with a concentration of 60 - 65% and a sulfuric acid solution with a concentration of 98% according to a volume ratio of 1:3.

[0020] The further setting of the present invention is that the addition amount of the pretreated hollow carbon nanospheres is 7.2-9.8% of the mass of aluminum chloride hexahydrate.

[0021] The further setting of the present invention is that the surfactant is selected from any one of glycerol monostearate and polyethylene glycol.

[0022] The second aspect of the present invention: There is also provided a preparation method of the above-mentioned multifunctional coating material with superhydrophilicity, including the following steps:

[0023] Step 1: Accurately weigh polyurethane resin, functional additives, synergistic additives, surfactant, sodium dodecyl sulfate, sodium dodecylbenzenesulfonate and water, and place the polyurethane resin, functional additives, synergistic additives, sodium dodecyl sulfate, sodium dodecylbenzenesulfonate and water in a mixing device, and process them at 3200-4200 r / min and 70-80 °C for 40-50 min;

[0024] Step 2: Add the surfactant again, and process it at 1200-1500 r / min and 40-50 °C for 20-30 min;

[0025] Step 3: After the mixing is completed, discharge the mixture, then conduct inspection and measurement, and finally obtain the finished product of the multifunctional coating material with superhydrophilicity.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] In the present invention, polyurethane resin, functional additives, synergistic additives, surfactant, sodium dodecyl sulfate, sodium dodecylbenzenesulfonate and water, etc. are used as raw materials. By mixing the polyurethane resin, functional additives, synergistic additives, sodium dodecyl sulfate, sodium dodecylbenzenesulfonate and water in a mixing device, adding the surfactant for treatment, discharging the mixture after the mixing is completed, then conducting inspection and measurement, and finally obtaining the finished product of the multifunctional coating material with superhydrophilicity. The multifunctional coating material with superhydrophilicity prepared by the present invention not only has good superhydrophilicity performance, but also has excellent antibacterial and anti-aging properties, effectively ensuring its quality and quality. The multifunctional coating material with superhydrophilicity and its preparation method provided by the present invention have a broader market prospect and are more suitable for popularization. Specific embodiments

[0028] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Example 1

[0030] This embodiment provides a multifunctional coating material with superhydrophilicity, which is composed of the following raw materials in parts by weight: 30 parts of polyurethane resin, 3 parts of functional additives, 3 parts of synergistic additives, 2 parts of surfactant, 4 parts of sodium dodecyl sulfate, 4 parts of sodium dodecylbenzenesulfonate, and 50 parts of water.

[0031] In this embodiment, it should be noted that the polyurethane resin is purchased from Shandong Aodemei Polymer Materials Co., Ltd.

[0032] Among them, the preparation process of the functional additives is as follows:

[0033] Ethyl orthosilicate is placed in absolute ethanol according to a mass ratio of 1:2.8, and stirred and mixed at 55°C and 100 r / min for 10 min. Then, a compound solution, ammonia water with a concentration of 25%, and eugenol are added to the obtained mixed solution, and stirring is continued for 5 min, and heat preservation treatment is carried out for 8 h;

[0034] Then, after centrifugation at a speed of 5200 r / min for 20 min, the obtained centrifugation product is washed with absolute ethanol 2 to 4 times, dried and ground to obtain functional additives.

[0035] Furthermore, the first compound solution is composed of γ-aminopropyltriethoxysilane and water mixed according to a mass ratio of 1:12, and the addition amount of the first compound solution is 2.5% of the mass of the mixed solution.

[0036] The addition amount of ammonia water is 2.8% of the mass of the mixed solution, and the addition amount of eugenol is 1.8% of the mass of the mixed solution.

[0037] In addition, the preparation process of the synergistic additives is as follows:

[0038] Aluminum chloride hexahydrate is put into deionized water according to a dosage ratio of 0.8 g / mL, and stirred at 120 r / min for 20 min. Then, pretreated hollow carbon nanospheres are added thereto, and treated at 7000 r / min for 40 min;

[0039] Then, the pH is adjusted to 8.8 with ammonia water, filtered by suction, washed to neutral, dried, placed in a nitrogen atmosphere, and treated at 880°C for 14 h. After cooling, functional additives are obtained.

[0040] Further, the preparation process of the pretreated hollow carbon nanospheres is as follows:

[0041] The hollow carbon nanospheres are placed in the treatment solution according to a dosage ratio of 0.05 g / mL and ultrasonically treated for 20 min;

[0042] After suction filtration, drying, and treatment at 540 °C for 100 min, the pretreated hollow carbon nanospheres are obtained;

[0043] Among them, the treatment solution is prepared by mixing a nitric acid solution with a concentration of 60% and a sulfuric acid solution with a concentration of 98% according to a volume ratio of 1:3.

[0044] The addition amount of the pretreated hollow carbon nanospheres is 7.2% of the mass of aluminum chloride hexahydrate.

[0045] In this embodiment, it should be noted that the hollow carbon nanospheres are purchased from Beijing Zhongke Keyou Nanotechnology Co., Ltd.

[0046] Among them, the surfactant is selected as glycerol monostearate.

[0047] In addition, this embodiment also provides a preparation method of the above-mentioned multifunctional coating material with superhydrophilicity, including the following steps:

[0048] Step 1: Accurately weigh polyurethane resin, functional additives, synergistic additives, surfactant, sodium dodecyl sulfate, sodium dodecylbenzenesulfonate, and water, and place the polyurethane resin, functional additives, synergistic additives, sodium dodecyl sulfate, sodium dodecylbenzenesulfonate, and water in a mixing device, and treat them at 3200 r / min and 70 °C for 40 min;

[0049] Step 2: Add the surfactant again and treat it at 1200 r / min and 40 °C for 20 min;

[0050] Step 3: After the mixing is completed, discharge the mixture, and then through inspection and metering, finally obtain the finished product of the multifunctional coating material with superhydrophilicity.

[0051] Example 2

[0052] The preparation method of the multifunctional coating material with superhydrophilicity provided in this embodiment is basically the same as that in Example 1, except that: the specific raw material composition and the specific preparation method of the multifunctional coating material with superhydrophilicity in this embodiment are different; the specific raw material composition and the specific preparation method of the multifunctional coating material with superhydrophilicity in this embodiment are as follows:

[0053] A multifunctional coating material with superhydrophilicity, which is composed of the following raw materials in parts by weight: 35 parts of polyurethane resin, 4 parts of functional additive, 4 parts of synergistic additive, 3 parts of surfactant, 5 parts of sodium dodecyl sulfate, 5 parts of sodium dodecylbenzenesulfonate and 55 parts of water.

[0054] In this embodiment, it should be noted that the polyurethane resin is purchased from Shandong Aodemei High Polymer Materials Co., Ltd.

[0055] Among them, the preparation process of the functional additive is as follows:

[0056] Ethyl orthosilicate is placed in absolute ethanol according to a mass ratio of 1:3, and stirred and mixed at 56 °C and 110 r / min for 12 min. Then, a compound solution, ammonia water with a concentration of 25% and eugenol are added to the obtained mixed solution, and stirring is continued for 6 min, and heat preservation treatment is carried out for 9 h;

[0057] Then, after centrifugation at a speed of 5300 r / min for 22 min, the obtained centrifuged product is washed 3 times with absolute ethanol, dried and milled to obtain the functional additive.

[0058] Furthermore, the first compound solution is composed of γ-aminopropyltriethoxysilane and water mixed according to a mass ratio of 1:13, and the addition amount of the first compound solution is 3.2% of the mass of the mixed solution.

[0059] The addition amount of ammonia water is 3.1% of the mass of the mixed solution, and the addition amount of eugenol is 2.5% of the mass of the mixed solution.

[0060] In addition, the preparation process of the synergistic additive is as follows:

[0061] Aluminum chloride hexahydrate is put into deionized water according to a dosage ratio of 1 g / mL, and stirred for 25 min under the condition of 170 r / min. Then, the pretreated hollow carbon nanospheres are added thereto, and treated under the condition of 7500 r / min for 43 min;

[0062] Then, the pH is adjusted to 9 with ammonia water, and after suction filtration, it is washed to neutrality, dried, placed in a nitrogen atmosphere, and treated at 890 °C for 15 h, and after cooling, the functional additive is obtained.

[0063] Furthermore, the preparation process of the pretreated hollow carbon nanospheres is as follows:

[0064] The hollow carbon nanospheres are placed in the treatment solution according to a dosage ratio of 0.1 g / mL and ultrasonically treated for 25 min;

[0065] After suction filtration, it is dried and placed at 545 °C for 110 min to obtain the pretreated hollow carbon nanospheres;

[0066] Among them, the treatment liquid is prepared by mixing a nitric acid solution with a concentration of 62% and a sulfuric acid solution with a concentration of 98% in a volume ratio of 1:3.

[0067] The addition amount of the pretreated hollow carbon nanospheres is 8.5% of the mass of aluminum chloride hexahydrate.

[0068] In this embodiment, it should be noted that the hollow carbon nanospheres are purchased from Beijing Zhongke Keyou Nanotechnology Co., Ltd.

[0069] Among them, the surfactant is selected as polyethylene glycol.

[0070] In addition, this embodiment also provides a preparation method of the above-mentioned multifunctional coating material with superhydrophilicity, including the following steps:

[0071] Step 1: Accurately weigh polyurethane resin, functional additives, synergistic additives, surfactant, sodium dodecyl sulfate, sodium dodecylbenzenesulfonate and water, and place the polyurethane resin, functional additives, synergistic additives, sodium dodecyl sulfate, sodium dodecylbenzenesulfonate and water in a mixing device, and process them at 3700 r / min and 75 °C for 45 min;

[0072] Step 2: Add the surfactant again, and process it at 1350 r / min and 45 °C for 25 min;

[0073] Step 3: After the mixing is completed, discharge the mixture, and then conduct inspection and metering, and finally obtain the finished product of the multifunctional coating material with superhydrophilicity.

[0074] Example 3

[0075] The preparation method of the multifunctional coating material with superhydrophilicity provided in this embodiment is basically the same as that in Example 1, except that: the specific raw material composition and the specific preparation method of the multifunctional coating material with superhydrophilicity in this embodiment are different; the specific raw material composition and the specific preparation method of the multifunctional coating material with superhydrophilicity in this embodiment are as follows:

[0076] A multifunctional coating material with superhydrophilicity is composed of the following raw materials in parts by weight: 40 parts of polyurethane resin, 6 parts of functional additives, 5 parts of synergistic additives, 4 parts of surfactant, 7 parts of sodium dodecyl sulfate, 7 parts of sodium dodecylbenzenesulfonate and 60 parts of water.

[0077] In this embodiment, it should be noted that the polyurethane resin is purchased from Shandong Aodemei Polymer Materials Co., Ltd.

[0078] Among them, the preparation process of the functional additives is as follows:

[0079] TEOS was placed in absolute ethanol according to a mass ratio of 1:3.2, and stirred and mixed at 58 °C and 120 r / min for 15 min. Then, a compound solution, 25% ammonia water, and eugenol were added to the obtained mixed solution, and stirring was continued for 8 min, followed by heat preservation treatment for 10 h;

[0080] Then, after centrifugation at a speed of 5400 r / min for 25 min, the obtained centrifuged product was washed 4 times with absolute ethanol, dried and ground to obtain a functional auxiliary agent.

[0081] Furthermore, the first compound solution was prepared by mixing γ-aminopropyltriethoxysilane and water according to a mass ratio of 1:14, and the addition amount of the first compound solution was 4.2% of the mass of the mixed solution.

[0082] The addition amount of ammonia water was 3.5% of the mass of the mixed solution, and the addition amount of eugenol was 3.1% of the mass of the mixed solution.

[0083] In addition, the preparation process of the synergistic auxiliary agent is as follows:

[0084] Aluminum chloride hexahydrate was put into deionized water according to a dosage ratio of 1.2 g / mL, and stirred for 30 min at 220 r / min. Then, the pretreated hollow carbon nanospheres were added thereto and treated at 8000 r / min for 46 min;

[0085] Then, the pH was adjusted to 9.2 with ammonia water, and after suction filtration, it was washed to neutrality, dried, placed in a nitrogen atmosphere, and treated at 900 °C for 16 h. After cooling, a functional auxiliary agent was obtained.

[0086] Furthermore, the preparation process of the pretreated hollow carbon nanospheres is as follows:

[0087] The hollow carbon nanospheres were placed in the treatment solution according to a dosage ratio of 0.15 g / mL and ultrasonically treated for 30 min;

[0088] After suction filtration, it was dried and placed at ~550 °C for 120 min to obtain the pretreated hollow carbon nanospheres;

[0089] Among them, the treatment solution was prepared by mixing a 65% nitric acid solution and a 98% sulfuric acid solution according to a volume ratio of 1:3.

[0090] The addition amount of the pretreated hollow carbon nanospheres was 9.8% of the mass of aluminum chloride hexahydrate.

[0091] In this example, it should be noted that the hollow carbon nanospheres were purchased from Beijing Zhongke Keyou Nanotechnology Co., Ltd.

[0092] Among them, the surfactant was selected as glycerol monostearate.

[0093] In addition, this embodiment also provides a preparation method of the above-mentioned multifunctional coating material with superhydrophilicity, including the following steps:

[0094] Step 1: Accurately weigh polyurethane resin, functional auxiliary, synergistic auxiliary, surfactant, sodium dodecyl sulfate, sodium dodecylbenzenesulfonate and water, and place the polyurethane resin, functional auxiliary, synergistic auxiliary, sodium dodecyl sulfate, sodium dodecylbenzenesulfonate and water in a mixing device, and process them at 4200 r / min and 80 °C for 50 min;

[0095] Step 2: Add the surfactant again, and process it at 1500 r / min and 50 °C for 30 min;

[0096] Step 3: After the mixing is completed, discharge the mixture, and then conduct inspection and metering, and finally obtain the finished product of the multifunctional coating material with superhydrophilicity.

[0097] Comparative Example 1: The difference from Example 1 is that in this example, an equal amount of silica is used to replace the functional auxiliary.

[0098] Comparative Example 2: The difference from Example 1 is that in this example, an equal amount of alumina is used to replace the synergistic auxiliary.

[0099] Performance test: The multifunctional coating material samples provided in Examples 1 to 3 and Comparative Examples 1 to 2 are respectively marked as Examples 1 to 3 and Comparative Examples 1 to 2; and the relevant performances of the multifunctional coating materials provided in Examples 1 to 3 and Comparative Examples 1 to 2 are tested as follows:

[0100] 1. Contact angle test: The test method is to apply each group of multifunctional coating materials on the glass surface with a thickness of 0.9 μm, and use a contact angle tester (model: DSA-25) produced by Germany to test the contact angle of the coating. At room temperature, set the water droplet size to 5 μL, drop the water droplet on the coating surface, and take the reading when the contact angle does not change. 2. Antibacterial test: The test method is ISO22196-2011.

[0101] 3. Aging resistance test: It is tested according to the standard of GB / T1865-1997. The obtained test data are recorded in Tables 1 to 3 below:

[0102] Table 1 Contact angle test results of each group of coating materials

[0103] Table 2 Antibacterial performance test results of each group of coating materials

[0104] Group Contact Angle (°) Example 1 Group 4 Example 2 Group 5 Example 3 Group 4 Control 1 Group 10 Control 2 Group 12

[0105] Table 3 Aging resistance test results of each group of coating materials

[0106] Group Bactericidal Rate of Staphylococcus aureus (%) Bactericidal Rate of Escherichia coli (%) Example 1 Group 99.7 98.5 Example 2 Group 99.5 98.4 Example 3 Group 99.8 98.6 Control 1 Group 95.2 94.9 Control 2 Group 97.6 96.2

[0107] Table 3 Aging Resistance Test Results of Coating Materials in Each Group

[0108] Group 2000h Hernia Aging Resistance Example 1 Group Appearance without change Example 2 Group Appearance without change Example 3 Group Appearance without change Control 1 Group Appearance without change Control 2 Group Appearance with change

[0109] By comparing and analyzing the relevant data in Tables 1-3, it can be seen that the multifunctional coating material with superhydrophilicity prepared by the present invention not only has good superhydrophilicity performance, but also has excellent antibacterial and aging resistance performance, effectively ensuring its quality and quality. This shows that the multifunctional coating material with superhydrophilicity provided by the present invention and its preparation method have a broader market prospect and are more suitable for popularization.

[0110] In the present invention, polyurethane resin, functional additives, synergistic additives, surfactant, sodium dodecyl sulfate, sodium dodecylbenzenesulfonate and water are used as raw materials. By placing polyurethane resin, functional additives, synergistic additives, sodium dodecyl sulfate, sodium dodecylbenzenesulfonate and water in a mixing device for mixing, and then adding surfactant for treatment, after the mixing is completed, the mixture is discharged, and then it is inspected and metered, and finally the finished product of the multifunctional coating material with superhydrophilicity is prepared. The multifunctional coating material with superhydrophilicity prepared by the present invention not only has good superhydrophilicity performance, but also has excellent antibacterial and aging resistance performance, effectively ensuring its quality and quality.

[0111] In the description of this specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0112] 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 the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art in the relevant technical field can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A multifunctional coating material with super hydrophilicity, characterized in that: The invention is composed of the following raw materials in parts by weight: 30 to 40 parts of polyurethane resin, 3 to 6 parts of functional additives, 3 to 5 parts of synergistic additives, 2 to 4 parts of surfactants, 4 to 7 parts of sodium dodecyl sulfate, 4 to 7 parts of sodium dodecylbenzene sulfonate and 50 to 60 parts of water; The preparation process of the functional additive is as follows: Put tetraethyl orthosilicate in anhydrous ethanol at a mass ratio of 1:2.8-3.2, stir and mix for 10-15 minutes at 55-58°C and 100-120r / min, then add compound liquid, 25% ammonia water and eugenol to the obtained mixture, continue stirring for 5-8 minutes, and keep warm for 8-10 hours; Then, after centrifugation at a speed of 5200-5400 r / min for 20-25 min, the obtained centrifugal product is washed 2-4 times with anhydrous ethanol, dried and ground to obtain a functional additive; The preparation process of the synergistic aid is as follows: Aluminum chloride hexahydrate was added into deionized water at a dosage ratio of 0.8 to 1.2 g / mL, stirred at 120 to 220 r / min for 20 to 30 min, and then pretreated hollow carbon nanospheres were added thereto, and treated at 7000 to 8000 r / min for 40 to 46 min; Then, the pH value is adjusted to 8.8-9.2 with aqueous ammonia, filtered, washed to neutrality, dried, placed in a nitrogen atmosphere, treated at 880-900° C. for 14-16 hours, and cooled to obtain a functional additive; The preparation process of the pretreated hollow carbon nanospheres is as follows: The hollow carbon nanospheres are placed in a treatment solution at a dosage ratio of 0.05 to 0.15 g / mL and ultrasonically treated for 20 to 30 minutes; After filtration, drying, and treating at 540-550° C. for 100-120 min, pretreated hollow carbon nanospheres are obtained; The treatment solution is a mixture of a nitric acid solution with a concentration of 60-65% and a sulfuric acid solution with a concentration of 98% in a volume ratio of 1:

3.

2. The multifunctional coating material with super hydrophilicity according to claim 1, characterized in that: The first compound liquid is prepared by mixing γ-aminopropyltriethoxysilane and water in a mass ratio of 1:12-14, and the addition amount of the first compound liquid is 2.5-4.2% of the mass of the mixed liquid.

3. The multifunctional coating material with super hydrophilicity according to claim 1, characterized in that: The amount of ammonia water added is 2.8-3.5% of the mass of the mixed solution, and the amount of eugenol added is 1.8-3.1% of the mass of the mixed solution.

4. The multifunctional coating material with super hydrophilicity according to claim 1, characterized in that: The addition amount of the pretreated hollow carbon nanospheres is 7.2-9.8% of the mass of aluminum chloride hexahydrate.

5. The multifunctional coating material with super hydrophilicity according to claim 1, characterized in that: The surfactant is selected from any one of glyceryl monostearate and polyethylene glycol.

6. The method for preparing a multifunctional coating material having super hydrophilicity according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1, accurately weighing polyurethane resin, functional additives, synergistic additives, surfactants, sodium dodecyl sulfate, sodium dodecylbenzene sulfonate and water, and placing the polyurethane resin, functional additives, synergistic additives, sodium dodecyl sulfate, sodium dodecylbenzene sulfonate and water in a mixing device, and treating at 3200-4200 r / min and 70-80° C. for 40-50 min; Step 2: Add a surfactant and process at 1200-1500 r / min and 40-50° C. for 20-30 min; Step 3: After the mixing is completed, the materials are discharged, and then inspected and measured to finally obtain a finished product of a multifunctional coating material with super hydrophilicity.