Photo-thermal hydrophobic deicing paint, coating and preparation method and application thereof

Abstract

The invention relates to the technical field of deicing, and provides a photo-thermal hydrophobic deicing coating, a coating and a preparation method and application of the photo-thermal hydrophobic deicing coating. The photo-thermal hydrophobic deicing coating provided by the invention comprises an organic silicon binder, a volatile organic solvent, hydrophobic material particles, photo-thermal material particles, epoxy resin and an epoxy resin curing agent, the hydrophobic material particles comprise nano-scale hydrophobic material particles and micron-scale hydrophobic material particles; the particle size of the photo-thermal material particles is nano-scale or micron-scale; the photo-thermal hydrophobic deicing coating is sprayed on the surface of a substrate and then cured, and the photo-thermal hydrophobic deicing coating is obtained. The photo-thermal hydrophobic deicing coating provided by the invention has excellent hydrophobicity and photo-thermal performance, can effectively prevent and remove ice, is good in adhesion and wear resistance, and can meet the application requirements in the field of road deicing. In addition, the photo-thermal hydrophobic deicing coating provided by the invention is simple in preparation method, low in cost and high in economic benefit.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of deicing, in particular to a photothermal hydrophobic deicing coating, a coating and a preparation method and application thereof. BACKGROUND

[0002] In winter, heavy rain and snow weather can easily lead to serious snow and ice accumulation on the road, which greatly endangers traffic safety and causes huge economic losses. At present, the methods for deicing and snow melting on the road mainly include passive and active methods. The active deicing and snow melting method is to give the road the function of snow melting and ice melting by designing the road structure, improving the performance of paving materials and adding functional facilities, so as to inhibit the accumulation of snow and ice on the road. However, the existing active deicing technology cannot meet the requirements of low cost, easy construction and high deicing performance at the same time, and is still in the stage of small-scale paving test road. The passive deicing method mainly includes manual and mechanical methods, and the method of spreading deicing salt. The method of spreading deicing salt is the main measure, but for the case of ultra-low temperature and a large amount of snow and ice, deicing salt cannot quickly and effectively melt snow and ice; and the large-scale use of deicing salt can cause damage to road materials and structures, and pollute the ecological environment.

[0003] With the development of new materials and energy storage technology, more and more experts and scholars are interested in new road deicing and snow melting technology. The hydrophobic coating technology not only can reduce the amount of ice and delay the formation of ice crystals, but also has the advantages of convenient construction and low cost, and has become one of the hottest researches.

[0004] At present, the hydrophobic coating has been gradually applied to the deicing of photovoltaic panels, wings and cables. However, the coating technology has limitations such as insufficient deicing performance and poor durability, which restricts the application of the technology in the field of road deicing. SUMMARY

[0005] Therefore, the present application provides a photothermal hydrophobic deicing coating, a coating and a preparation method and application thereof. The photothermal hydrophobic deicing coating provided by the present application has good deicing performance and good durability, and can meet the application requirements in the field of road deicing.

[0006] In order to achieve the above-mentioned application purposes, the present application provides the following technical solutions:

[0007] A photothermal hydrophobic deicing coating, comprising the following components: an organic silicon bonding agent, a volatile organic solvent, hydrophobic material particles, photothermal material particles, an epoxy resin and an epoxy resin curing agent; the hydrophobic material particles comprise nano-level hydrophobic material particles and micron-level hydrophobic material particles; the particle size of the photothermal material particles is nano-level or micron-level.

[0008] The mass ratio of the epoxy resin and the silicone adhesive is 1:0.3-3; the mass ratio of the total mass of the epoxy resin and the silicone adhesive to the total mass of the hydrophobic material particles and the photothermal material particles is 0.3-7:1; and the mass ratio of the nanoscale hydrophobic material particles to the microscale hydrophobic material particles is 0.5-6:1.

[0009] Preferably, the mass ratio of the total mass of the epoxy resin and the silicone adhesive to the mass of the volatile organic solvent is 1:5-50.

[0010] The mass ratio of the epoxy resin curing agent to the epoxy resin is 1:1-10.

[0011] Preferably, the mass ratio of the total mass of the epoxy resin and the silicone adhesive to the mass of the photothermal material particles is 100:0.5-10.

[0012] Preferably, the hydrophobic material particles are one or more of hydrophobic silica particles, polytetrafluoroethylene particles, and hydrophobic silica-coated carbon nanotubes; and the photothermal material particles include one or more of carbon black particles, carbon nanotube particles, graphene particles, modified carbon black particles, modified carbon nanotube particles, and graphene oxide particles.

[0013] Preferably, the silicone adhesive is a one-component silicone adhesive or a two-component silicone adhesive; the one-component silicone adhesive is polysiloxane; and the two-component silicone adhesive includes polydimethylsiloxane and a polydimethylsiloxane curing agent.

[0014] The volatile organic solvent includes one or more of ethyl acetate, ethanol, and xylene.

[0015] The application also provides a preparation method of the photothermal hydrophobic deicing coating described in the above scheme, including the following steps:

[0016] Mixing the silicone adhesive, the volatile organic solvent, the hydrophobic material particles, the photothermal material particles, the epoxy resin, and the epoxy resin curing agent to obtain the photothermal hydrophobic deicing coating.

[0017] The application also provides a photothermal hydrophobic deicing coating layer prepared from the photothermal hydrophobic deicing coating described in the above scheme.

[0018] The application also provides a preparation method of the photothermal hydrophobic deicing coating layer described in the above scheme, including the following steps:

[0019] Spraying the photothermal hydrophobic deicing coating on a surface of a substrate and curing to obtain the photothermal hydrophobic deicing coating layer.

[0020] Preferably, the spraying conditions include a spraying distance of 20-80 cm, an output air pressure of 100-600 kPa, and a spraying time of 1-10 seconds.

[0021] The application also provides the application of the photo-thermal hydrophobic deicing coating described in the above scheme or the photo-thermal hydrophobic deicing coating prepared by the preparation method described in the above scheme in road deicing.

[0022] The application provides a photo-thermal hydrophobic deicing coating, which comprises the following components: a silicone binder, a volatile organic solvent, hydrophobic material particles, photo-thermal material particles, an epoxy resin and an epoxy resin curing agent; the hydrophobic material particles comprise nano-level hydrophobic material particles and micro-level hydrophobic material particles; the particle size of the photo-thermal material particles is nano-level or micro-level; the mass ratio of the epoxy resin to the silicone binder is 1:0.3-3; the ratio of the total mass of the epoxy resin and the silicone binder to the total mass of the hydrophobic material particles and the photo-thermal material particles is 0.3-7:1; and the mass ratio of the nano-level hydrophobic material particles to the micro-level hydrophobic material particles is 0.5-6:1. By adding the nano-level hydrophobic material particles and the micro-level hydrophobic material particles, the application can construct a micro-nano dual rough structure on the surface of the coating, improve the hydrophobicity of the surface of the coating, increase the contact angle, reduce the contact area of the water droplets with the surface, and make the water droplets more likely to roll off, thereby reducing the icing rate. By adding the photo-thermal material particles, the application endows the coating material with photo-thermal properties, can effectively improve the surface temperature rising rate of the coating in an illumination environment, reduce the time required for the ice layer to melt, and improve the deicing performance of the coating. The matrix material of the coating is formed by compounding the silicone binder and the epoxy resin, which can effectively enhance the adhesion between the hydrophobic deicing coating and the road surface, reduce the peeling of the hydrophobic and photo-thermal materials, maintain the surface roughness, improve the wear resistance of the photo-thermal hydrophobic deicing coating, and thus improve the durability of the coating.

[0023] The application also provides a photo-thermal hydrophobic deicing coating and a preparation method thereof. The photo-thermal hydrophobic deicing coating is obtained by spraying the photo-thermal hydrophobic deicing coating described in the above scheme on the surface of a substrate and then curing. The photo-thermal hydrophobic deicing coating provided by the application has excellent hydrophobicity and photo-thermal properties, can effectively prevent and remove ice, has good adhesion and wear resistance, and can meet the application requirements in the field of road deicing. Moreover, the preparation method of the photo-thermal hydrophobic deicing coating provided by the application is simple, low in cost and high in economic benefit. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a flowchart for preparing the photo-thermal hydrophobic deicing coating in the embodiments of the application;

[0025] Figure 2 It is the contact angle of the photo-thermal hydrophobic deicing coating prepared in Embodiment 1;

[0026] Figure 3 Contact angle of the photothermal hydrophobic deicing coating prepared for Example 2. DETAILED DESCRIPTION

[0027] The present application provides a kind of photothermal hydrophobic deicing coating, including the following components: silicone adhesive, volatile organic solvent, hydrophobic material particles, photothermal material particles, epoxy resin and epoxy resin curing agent;The hydrophobic material particles include nanoscale hydrophobic material particles and micron hydrophobic material particles;The particle size of the photothermal material particles is nanoscale or micron.

[0028] In the present application, the mass ratio of the epoxy resin and silicone adhesive is 1:0.3-3, and specifically can be 2:1, 1:1, 1:2 or 1:3;The ratio of the total mass of the epoxy resin and silicone adhesive to the total mass of the hydrophobic material particles and photothermal material particles is 0.3-7:1, and specifically can be 0.3:1, 1.2:1, 3.2:1, 5:1, or 6:1;The mass ratio of the nanoscale hydrophobic material particles and micron hydrophobic material particles is 0.5-6:1, and specifically can be 0.7:1, 1.4:1, 2:1 or 6:1. The present application uses nanoscale hydrophobic particles and micron hydrophobic particles in combination, which can construct a "micro-nano double rough structure" to improve the hydrophobicity of the coating surface.

[0029] In the present application, the mass ratio of the total mass of the epoxy resin and silicone adhesive to the volatile organic solvent is preferably 1:5-50, and specifically can be 1:15, 1:17, 1:20, 1:25, 1:30 or 1:50;The mass ratio of the epoxy resin curing agent to the epoxy resin is preferably 1:1-10, and specifically can be 1:3 or 1:10;The mass ratio of the total mass of the epoxy resin and silicone adhesive to the mass of the photothermal material particles is preferably 100:0.5-10, and specifically can be 100:0.5, 100:1.25 or 100:10.

[0030] In the present application, the silicone adhesive is preferably a one-component silicone adhesive or a two-component silicone adhesive;The one-component silicone adhesive is preferably polysiloxane;The two-component silicone adhesive preferably includes polydimethylsiloxane and polydimethylsiloxane curing agent, and the mass ratio of the polydimethylsiloxane and polydimethylsiloxane curing agent is preferably 10:1;In the present application, when calculating the mass ratio of the silicone adhesive and other components, the mass of the adhesive is calculated, and the mass of the curing agent is not included;The volatile organic solvent preferably includes one or more of ethyl acetate, ethanol and xylene.

[0031] In the present application, the hydrophobic material particles are preferably one or more of hydrophobic silica particles, polytetrafluoroethylene particles and hydrophobic silica-coated carbon nanotubes; the present application does not have special requirements for the source of the hydrophobic silica-coated carbon nanotubes, and commercially available products or methods well known to those skilled in the art can be used; the hydrophobic material particles include nanoscale hydrophobic material particles and micrometer-scale hydrophobic material particles, the average particle size of the micrometer-scale hydrophobic material particles is preferably 1-50 μm, and can be 1 μm or 20 μm, the average particle size of the nanoscale hydrophobic material particles is preferably 10-500 nm, and can be 20 nm; the photothermal material particles preferably include one or more of carbon black particles, carbon nanotube particles, graphene particles, modified carbon black particles, modified carbon nanotube particles and graphene oxide particles. The average particle size of the photothermal material particles is preferably 20 nm-50 μm, and can be 2 μm; the modified carbon nanotube is preferably a hydrophobic carbon nanotube; the present application does not have special requirements for the modified carbon nanotube and the modified carbon black particles, and modified carbon nanotubes and modified carbon black particles with light-heat conversion function well known to those skilled in the art can be used.

[0032] The present application does not have special requirements for the types of the epoxy resin and the epoxy resin curing agent, and those well known to those skilled in the art can be used.

[0033] The present application also provides a preparation method of the above-mentioned photo-thermal hydrophobic deicing coating, comprising the following steps:

[0034] Mixing the organic silicon binder, the volatile organic solvent, the hydrophobic material particles, the photothermal material particles, the epoxy resin and the epoxy resin curing agent to obtain the photo-thermal hydrophobic deicing coating.

[0035] In the present application, the mixing order of the components is not limited, and those skilled in the art can select appropriate addition order of the components according to actual needs, as long as a uniformly dispersed coating composition can be finally obtained. The specific mixing order given in the examples is only exemplary and should not be understood as a limitation of the present application.

[0036] In the specific embodiments of the present application, the mixing order of the raw materials can be: first mixing the silicone binder and the volatile organic solvent to obtain a first mixed solution; then second mixing the mixed solution and the hydrophobic material particles and the photothermal material particles to obtain a second mixed solution; and then third mixing the second mixed solution, the epoxy resin and the epoxy resin curing agent to obtain the photothermal and hydrophobic deicing coating. The first mixing, the second mixing and the third mixing are all carried out by ultrasonic dispersion combined with mechanical stirring, wherein the speed of the mechanical stirring is preferably 500-800 rpm, and the ultrasonic frequency of the ultrasonic dispersion is preferably 40±2 KHz; the time of the first mixing, the second mixing and the third mixing is preferably 5-60 min. In the specific embodiments of the present application, when the silicone binder is a two-component silicone binder, the two components of the silicone binder are preferably mixed uniformly first, and then the volatile organic solvent is added; when the silicone binder is a single component, the first mixing can be omitted, and the single-component silicone binder and the epoxy resin curing agent can be added together.

[0037] The present application also provides a photothermal and hydrophobic deicing coating prepared from the photothermal and hydrophobic deicing coating described in the above scheme.

[0038] The present application also provides a preparation method of the photothermal and hydrophobic deicing coating described in the above scheme, comprising the following steps:

[0039] The photothermal and hydrophobic deicing coating is obtained by spraying the photothermal and hydrophobic deicing coating on the surface of the substrate and then curing.

[0040] In the present application, the substrate is preferably a cement concrete pavement.

[0041] In the present application, the spraying conditions include: the spraying distance is 20-80 cm, which can be specifically 45 cm or 50 cm; the output air pressure is 100-600 kPa, which can be specifically 300 kPa or 400 kPa; and the spraying time is 1-10 seconds, which can be specifically 4 seconds or 6 seconds.

[0042] In the present application, the curing can be carried out at room temperature.

[0043] The present application also provides the application of the photothermal and hydrophobic deicing coating described in the above scheme or the photothermal and hydrophobic deicing coating prepared by the preparation method described in the above scheme in road deicing. The road is specifically a cement concrete pavement.

[0044] The technical solutions in the present application will be clearly and completely described below in combination with the embodiments in the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0045] Figure 1 A flowchart for preparing the photo-thermal hydrophobic deicing coating in the embodiments of the present application.

[0046] The type of the polydimethylsiloxane and the polydimethylsiloxane curing agent used in the following embodiments is 184, the type of the epoxy resin is E51, and the type of the epoxy resin curing agent is D400.

[0047] Embodiment 1

[0048] (1) 1 g of polydimethylsiloxane and 0.1 g of polydimethylsiloxane curing agent were weighed, uniformly stirred, and then added to 70 mL of ethyl acetate, which was placed in an ultrasonic disperser, and then fully stirred and mixed for 10 min by combining a mechanical stirring mode (500 rpm).

[0049] (2) 0.7 g of nano-sized polytetrafluoroethylene particles (with an average particle size of 20 nm), 0.5 g of micro-sized polytetrafluoroethylene particles (with an average particle size of 20 μm), and 0.05 g of micro-sized carbon nanotube particles (with an average particle size of 2 μm) were weighed, and then added to the above-mentioned mixed solution, and then ultrasonic dispersion was combined with mechanical stirring (600 rpm) to mix for 10 min.

[0050] (3) 3 g of epoxy resin and 1 g of epoxy resin curing agent were added to the above-mentioned mixed solution, and then ultrasonic dispersion was combined with mechanical stirring (600 rpm) to mix for 15 min, so as to obtain a photo-thermal hydrophobic deicing coating.

[0051] (4) The coating obtained in (3) was transferred to a spray pot, and then a clean cement concrete mixture surface layer was sprayed, the spraying distance was 50 cm, the output air pressure was 400 kPa, the spraying time was 6 s, and then the coating was cured at room temperature, so as to obtain a photo-thermal hydrophobic deicing coating.

[0052] Embodiment 2

[0053] (1) 2 g of polydimethylsiloxane and 0.2 g of polydimethylsiloxane curing agent were weighed, uniformly stirred, and then added to 70 mL of ethyl acetate, which was placed in an ultrasonic disperser, and then fully stirred and mixed for 10 min by combining a mechanical stirring mode (500 rpm).

[0054] (2) 0.7 g of nano-sized hydrophobic silica particles (average particle size of 20 nm), 0.5 g of micro-sized hydrophobic silica particles (average particle size of 20 μm), and 0.05 g of micro-sized carbon nanotube particles (average particle size of 2 μm) were weighed out and added to the mixed solution, and then ultrasonic dispersion combined with mechanical stirring (600 rpm) was performed for 10 min.

[0055] (3) 2 g of an epoxy resin and 0.6 g of an epoxy resin curing agent were added to the mixed solution, and then ultrasonic dispersion combined with mechanical stirring (600 rpm) was performed for 15 min to obtain a photo-thermal hydrophobic deicing coating.

[0056] (4) The coating obtained in (3) was transferred to a spray can, and a spray coating operation was performed on the surface of a clean cement concrete mixture, at a spray distance of 50 cm, an output air pressure of 400 kPa, and a spray time of 4 s. After the coating was cured at room temperature, a photo-thermal hydrophobic deicing coating was obtained.

[0057] Test Example

[0058] 1. Hydrophobic property test

[0059] The photo-thermal hydrophobic deicing coating prepared in Example 1 or 2 was subjected to a contact angle test (using water as the liquid), and the results are shown in Table 1. The water droplets on the surface of the coating could maintain a spherical shape, and the contact angles were 140° and 145°, respectively, indicating excellent hydrophobic properties. Figure 2 3

[0060] 2. Photo-thermal property test

[0061] The photo-thermal hydrophobic deicing coating prepared in Example 1 or 2 was subjected to a temperature rise test, and it was found that, within 1 hour of infrared light irradiation, the temperature of the coating could be raised by 4°C and 5°C, respectively, relative to a sample without the coating. This indicates that the coating has obvious photo-thermal properties.

[0062] 3. Adhesion property test

[0063] The adhesion strength between the coating and the substrate surface was tested by a pull-off test, and the adhesion strengths of the coatings of Example 1 and Example 2 were 1.8 MPa and 1.7 MPa, respectively. This indicates that the coating of the present application has good adhesion to the cement concrete pavement.

[0064] 4. Abrasion resistance test

[0065] The contact angle of the surface of the sample after a wet wheel abrasion test was tested according to the test method of T 0752--2011 in the Highway Engineering Asphalt and Asphalt Mixture Test Procedures (JTG E20-2011), and the contact angle reduction rate before and after abrasion was calculated. The calculated results for Example 1 and Example 2 were 1% and 3%, respectively. This indicates that the coating of the present application has good abrasion resistance.​​

[0066] From the above embodiment results, the light-heat hydrophobic deicing coating provided by the present application has excellent hydrophobicity and light-heat performance, good deicing effect, good adhesion effect with the cement concrete pavement, strong wear resistance, and has a wide application prospect in the field of pavement deicing.

[0067] The above only describes the preferred embodiments of the present application, and it should be noted that for ordinary skilled persons in the art, several improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A photothermal hydrophobic deicing coating, characterized in that: The invention comprises the following components: an organic silicon binder, a volatile organic solvent, hydrophobic material particles, photothermal material particles, an epoxy resin and an epoxy resin curing agent; the hydrophobic material particles include nano-scale hydrophobic material particles and micro-scale hydrophobic material particles; the particle size of the photothermal material particles is nano-scale or micro-scale; The mass ratio of the epoxy resin and the silicone binder is 1:0.3-3; the ratio of the total mass of the epoxy resin and the silicone binder to the total mass of the hydrophobic material particles and the photothermal material particles is 0.3-7:1; the mass ratio of the nano-scale hydrophobic material particles to the micron-scale hydrophobic material particles is 0.5-6:

1.

2. The photothermal hydrophobic deicing coating according to claim 1, characterized in that: The mass ratio of the total mass of the epoxy resin and the silicone binder to the volatile organic solvent is 1:5 to 50; The mass ratio of the epoxy resin curing agent to the epoxy resin is 1:1-10.

3. The photothermal hydrophobic deicing coating according to claim 1, characterized in that: The mass ratio of the total mass of the epoxy resin and the organosilicon binder to the mass of the photothermal material particles is 100:0.5-10.

4. The photothermal hydrophobic deicing coating according to claim 1, characterized in that: The hydrophobic material particles are one or more of hydrophobic silica particles, polytetrafluoroethylene particles and hydrophobic silica-coated carbon nanotubes; the photothermal material particles include one or more of carbon black particles, carbon nanotube particles, graphene particles, modified carbon black particles, modified carbon nanotube particles and graphene oxide particles.

5. The photothermal hydrophobic deicing coating according to claim 1, characterized in that: The organosilicon adhesive is a single-component organosilicon adhesive or a two-component organosilicon adhesive; the single-component organosilicon adhesive is polysiloxane; the two-component organosilicon adhesive includes polydimethylsiloxane and a polydimethylsiloxane curing agent; The volatile organic solvent includes one or more of ethyl acetate, ethanol and xylene.

6. The method for preparing the photothermal hydrophobic deicing coating according to any one of claims 1 to 5, characterized in that: The following steps are involved: The photothermal hydrophobic deicing coating is obtained by mixing an organic silicon binder, a volatile organic solvent, hydrophobic material particles, photothermal material particles, epoxy resin and epoxy resin curing agent.

7. A photothermal hydrophobic deicing coating, characterized in that: The photothermal hydrophobic deicing coating is prepared from the photothermal hydrophobic deicing coating according to any one of claims 1 to 5.

8. The method for preparing the photothermal hydrophobic deicing coating according to claim 7, characterized in that: The following steps are involved: The photothermal hydrophobic deicing coating is sprayed on the surface of a substrate and then cured to obtain the photothermal hydrophobic deicing coating.

9. The preparation method according to claim 8, characterized in that The spraying conditions include: a spraying distance of 20 to 80 cm, an output air pressure of 100 to 600 kPa, and a spraying time of 1 to 10 seconds.

10. Use of the photothermal hydrophobic deicing coating according to claim 7 or the photothermal hydrophobic deicing coating prepared by the preparation method according to claim 8 or 9 in road deicing.

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