Reflective film surface coating, reflective film and its preparation method

Abstract

This invention relates to a reflective film surface coating and an anti-fouling reflective film. The reflective film surface coating comprises carbon nanotubes, silica sol, tetraethyl orthosilicate, fluorosilane, an antistatic agent, isopropanol, ammonia, and water. The reflective film surface coating prepared by this invention has a large contact angle with water droplets, thus exhibiting excellent superhydrophobic properties. Fine water droplets condensed on the reflective film quickly roll off, solving the problem of the influence of fine water droplets on the retroreflective performance of the reflective film. By adding an appropriate amount of antistatic agent to the coating material, combined with the good conductivity of carbon nanotubes, charged particles attached to the reflective film surface can be rapidly discharged, eliminating the electrostatic interaction between charged particles and the reflective film, thereby preventing particulate pollutants such as dust in the air from depositing on its smooth surface.

Description

Technical Field

[0001] This invention relates to the field of safety protection, and in particular to a reflective film surface coating, a reflective film, and a method for preparing the same. Background Technology

[0002] Reflective film is a special thin-film material made using the principle of retroreflection. It has a wide range of applications in safety protection, including road traffic signs, reflective markings for vehicles, special work clothing, fire safety signs, railway signs, and mining signs. Its safety warning effect plays a significant role in protecting people's lives and property. For example, when reflective film is applied to road traffic signs, it reflects the light emitted by vehicle headlights at night, making the warning information on the sign visible to the driver.

[0003] However, reflective films often have two problems in actual use. One is that condensation easily occurs on the surface of the reflective film. The fine water droplets condensed on the surface of the reflective film will change the path of the incident light and reduce the amount of incident light reaching the reflective layer. When the incident light is reflected by the reflective layer to the surface of the reflective film, it will be affected by the refraction of the fine water droplets again, which will seriously weaken the reflective effect of the reflective film. The other problem is that when the reflective film is exposed to outdoor environment conditions for a long time, rainwater, dust and other particulate pollutants in the air will gradually settle on its surface. After a long period of accumulation, a dense pollutant layer will be formed. If it cannot be removed in time, its reflective effect will be severely reduced or even lost.

[0004] Traditional solutions involve creating raised structures on the surface of the reflective film and coating the grooves with a hydrophilic coating to achieve anti-condensation and anti-frost properties. However, fine water droplets condense into larger droplets in the hydrophilic layer and then flow down the reflective film surface, failing to wash away quickly enough to eliminate the impact of fine water droplets on the retroreflective performance of the film. Furthermore, this approach doesn't consider that these grooves easily accumulate large amounts of dust from the air, which deposits on the reflective film surface and severely affects its performance. Another solution is to prepare a silica coating. When it rains, water forms a flat film with a low contact angle on its surface, and as this film slides down under gravity, it carries away the dust and other dirt accumulated on the coating surface. However, this coating requires water to remove contaminants, and rain doesn't occur every day. Artificial water supply increases manpower and resources, and this coating cannot promptly solve the condensation problem.

[0005] Therefore, it is of great significance to develop a reflective film surface coating that can simultaneously solve the problems of condensation and particulate pollutant accumulation. Summary of the Invention

[0006] Based on this, the present invention provides a reflective film surface coating, a reflective film, and a method for preparing the same, which can simultaneously solve the problems of condensation and particulate pollutant accumulation on reflective films.

[0007] A reflective film surface coating, comprising the following raw material components by weight:

[0008]

[0009] The fluorosilane is selected from at least one of heptadecafluorodecyltrimethoxysilane and heptadecafluorodecyltriethoxysilane; the volume concentration of the ammonia water is 20% to 30%.

[0010] In some embodiments, the reflective film surface coating includes the following raw material components:

[0011]

[0012] In some embodiments, the carbon nanotubes in the reflective film surface coating are multi-walled carbon nanotubes.

[0013] In some embodiments, the antistatic agent in the reflective film surface coating is selected from at least one of alkyl sulfonates, alkyl phosphates, and alkyl dithiocarbamates.

[0014] A method for preparing a surface coating of a reflective film includes the following steps:

[0015] Mixture A is prepared by mixing carbon nanotubes and isopropanol;

[0016] Mixture A, water and ammonia water are mixed and stirred. Silica sol and tetraethyl orthosilicate are then added to prepare mixture B.

[0017] Mixture B, fluorosilane, and antistatic agent are mixed to prepare the raw material solution for the reflective film surface coating;

[0018] The raw material liquid is coated onto the substrate and then dried.

[0019] An anti-fouling reflective film includes a reflective film and a reflective film surface coating, wherein the reflective film surface coating is disposed on at least one side surface of the reflective film.

[0020] In some embodiments, the anti-fouling reflective film is a microprism reflective film, which includes a face film layer, a prism reflective layer, an adhesive layer and a release layer stacked sequentially, with the surface coating layer of the reflective film located on the face film layer.

[0021] In some embodiments, the anti-fouling reflective film is made of a material selected from PET, PVC, and PMMA.

[0022] In some embodiments, the adhesive layer material in the anti-fouling reflective film is polyacrylate pressure-sensitive adhesive.

[0023] A method for preparing an anti-fouling reflective film includes the following steps:

[0024] The surface of the reflective film is treated to give it a rough surface;

[0025] The raw material liquid for the reflective film surface coating is applied to the reflective film surface, and after drying, a reflective film surface coating is formed on the reflective film surface.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] This invention prepares a superhydrophobic and antifouling coating of carbon nanotubes. During the hydrolysis of tetraethyl orthosilicate, an organic-inorganic hybrid technology is used to load the hydrolyzed nano-silica particles onto the defective surface of carbon nanotubes. The carbon nanotubes possess a large specific surface area, providing a good adhesion site for the nano-silica particles. Simultaneously, the loading of nano-silica particles effectively increases the surface roughness of the carbon nanotubes, facilitating the formation of a rough micro / nano structure surface. This reduces the contact area between pollutants such as rainwater and particles in the air and the reflective film surface, thereby effectively improving the antifouling performance of the coating. The water content in the system is a crucial determinant of the tetraethyl orthosilicate hydrolysis rate, which in turn determines the particle size and morphology of the silica particles, thus affecting the hydrophobic properties of the nanoparticles. The addition of fluorosilanes modifies the surface of nanoparticles in the system, introducing fluorine-containing molecular chains onto the nanoparticle surface. Due to the strong polarity of fluorine atoms, other groups find it difficult to capture electrons from their surface, thus hindering reactions. This results in a coating with low surface energy, significantly improving its hydrophobic properties and preventing airborne pollutants from adhering to its surface. Furthermore, by adding an appropriate amount of antistatic agent to the coating material, combined with the excellent conductivity of carbon nanotubes, charged particles adhering to the reflective film surface can be rapidly discharged, eliminating electrostatic interactions between charged particles in the air and the reflective film, preventing them from remaining on the surface. Simultaneously, water droplets rolling on the surface carry away dust and other pollutants, which are then removed by external forces such as wind and rain, ultimately achieving a self-cleaning effect on the reflective film surface.

[0028] The preparation process of this invention is simple and easy to implement. The surface coating of the prepared reflective film has good light transmission performance, with a light transmittance of not less than 90%. The surface coating of the prepared reflective film has good weather resistance. After long-term outdoor use, it still has good anti-frost, anti-dew and self-cleaning effects, which helps to extend the service life of the reflective film. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the anti-fouling reflective film in the embodiment;

[0030] Figure 2 This is a schematic diagram of the reflective film in an example. Detailed Implementation

[0031] The reflective film surface coating, reflective film, and preparation method of the present invention will be further described in detail below with reference to specific embodiments. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] One embodiment of the present invention provides a reflective film surface coating, comprising the following raw material components by weight:

[0034]

[0035]

[0036] The fluorosilane is selected from at least one of heptadecafluorodecyltrimethoxysilane and heptadecafluorodecyltriethoxysilane; the volume concentration of ammonia is 20% to 30%.

[0037] Optionally, the volume concentration of ammonia water is 25% to 28%.

[0038] It is understandable that water is necessary. The water content in the system is an important factor determining the hydrolysis rate of tetraethyl orthosilicate, and the hydrolysis rate determines the particle size and morphology of silica particles, thus affecting the hydrophobic properties of nanoparticles.

[0039] In some embodiments, the reflective film surface coating includes the following raw material components:

[0040]

[0041] In some of these examples, the carbon nanotubes in the reflective film surface coating are multi-walled carbon nanotubes.

[0042] The numerous defects on the surface of the carbon nanotube network structure facilitate the adhesion of hydrophobic nano-silica particles to its surface, thereby forming a unique micro-nano morphology.

[0043] In some of these examples, the antistatic agent in the reflective film surface coating is selected from at least one of alkyl sulfonates, alkyl phosphates, and alkyl dithiocarbamates.

[0044] It is understandable that alkyl sulfonates are colorless and transparent, have good dispersion, and possess excellent conductivity and static dissipation ability. They can effectively eliminate static charges on the coating surface, prevent static accumulation, and attract dust.

[0045] The present invention also provides a method for preparing a reflective film surface coating, comprising steps S10 to S40.

[0046] Step S10: Mix carbon nanotubes and isopropanol to prepare mixture A.

[0047] Alternatively, carbon nanotubes may be added in the form of powdered carbon nanotubes.

[0048] Step S20: Mix mixture A, water and ammonia, stir, add silica sol and tetraethyl orthosilicate to prepare mixture B.

[0049] In some examples, in step S20, water and ammonia are added sequentially to mixture A, and the mixture is stirred at 1000 r / min for 10 min. Then, silica sol and tetraethyl orthosilicate are added, and the mixture is stirred at 1500 r / min for 1 h to 2 h.

[0050] Step S30: Mix mixture B, fluorosilane and antistatic agent, stir for 24h to 72h to prepare the raw material solution for the reflective film surface coating.

[0051] Step S40: Coat the raw material liquid onto the substrate and dry.

[0052] The present invention provides a reflective film surface coating prepared by the sol-gel method. Carbon nanotubes have good chemical inertness, so particulate pollutants in the air are not likely to react with them. At the same time, by fixing hydrophobic nano-silica water particles on its surface, a superhydrophobic coating with micro-nano structure can be formed, thereby effectively inhibiting the adhesion of fine water droplets on its surface and achieving anti-frost and anti-dew effects.

[0053] By adding an appropriate amount of antistatic agent to the coating material and combining it with the good conductivity of carbon nanotubes, the charged particles attached to the surface of the reflective film can be quickly discharged, eliminating the electrostatic interaction between the charged particles and the reflective film, thus preventing them from staying on the surface of the reflective film. At the same time, they can be detached under the action of external forces such as wind and rain, ultimately achieving the self-cleaning effect of the reflective film surface.

[0054] The present invention also provides an anti-fouling reflective film, comprising a reflective film and a reflective film surface coating, wherein the reflective film surface coating is disposed on at least one surface of the reflective film.

[0055] In some of these examples, an anti-fouling reflective film 100 is provided, such as Figure 1 As shown, it includes a reflective film surface coating 110 and a reflective film 120, with the reflective film surface coating 110 disposed on one side surface of the reflective film 120.

[0056] In some of these examples, in the anti-fouling reflective film 100, the reflective film 120 is a microprism reflective film.

[0057] Preferably, the reflective film 120 is selected from the full-prism reflective film among microprism reflective films.

[0058] In some of these examples, reflective film 120, such as Figure 2 As shown, it includes a face film layer 121, a prism reflective layer 122, an adhesive layer 123 and a release layer 124 stacked in sequence, with a reflective film surface coating 110 located on the face film layer 121.

[0059] In some of these examples, the anti-fouling reflective film uses a faceplate material selected from PET, PVC, and PMMA.

[0060] In some of these examples, the adhesive layer material in the anti-fouling reflective film is polyacrylate pressure-sensitive adhesive.

[0061] One embodiment of the present invention provides a method for preparing an anti-fouling reflective film, comprising steps S40 to S50:

[0062] Step S40: The surface of the reflective film is treated to give it a rough surface.

[0063] In some of these examples, in step S40, the surface of the reflective film is treated with a corona treatment machine, the output frequency of which is 15kHz to 18kHz and the electrode gap is 1.3mm to 1.5mm.

[0064] Step S50: Apply the raw material liquid for the reflective film surface coating to the reflective film surface, and after drying, form a reflective film surface coating on the reflective film surface.

[0065] In some examples, in step S50, the reflective film surface coating is applied to the reflective film surface layer after corona treatment by spraying or brushing, and then allowed to air dry naturally.

[0066] The reflective film surface coating prepared by this invention has good adhesion to the reflective film surface, and the adhesion level between the two is not lower than level 1.

[0067] The reflective film surface coating prepared by this invention has a large contact angle with water droplets, thus exhibiting excellent superhydrophobic properties. Tiny water droplets condensed on the reflective film quickly roll off, resolving the impact of fine water droplets on the retroreflective performance of the reflective film. By adding an appropriate amount of antistatic agent to the coating material, combined with the excellent conductivity of carbon nanotubes, charged particles attached to the reflective film surface can be rapidly discharged, eliminating the electrostatic interaction between charged particles and the reflective film. This prevents particulate pollutants such as dust in the air from depositing on its smooth surface. Furthermore, as water droplets roll on its surface, they carry away dust and other pollutants from the reflective film surface, and are further removed by external forces such as wind and rain, ultimately achieving a self-cleaning effect on the reflective film surface. This solves the condensation problem of the reflective film, ensuring the cleanliness of the reflective film surface and thus guaranteeing its reflective effect.

[0068] The preparation process of this invention is simple and easy to implement. The surface coating of the prepared reflective film has good light transmission performance, with a light transmittance of not less than 90%. The surface coating of the prepared reflective film has good weather resistance. After long-term outdoor use, it still has good anti-frost, anti-dew and self-cleaning effects, which helps to extend the service life of the reflective film. Specific Implementation

[0070] The following examples illustrate the reflective film surface coating, reflective film, and preparation method of the present invention, but the present invention is not limited to the following embodiments.

[0071] The reflective film used in the following examples and comparative examples was purchased from ORAFOL in Germany, model number 7910 reflective film.

[0072] Example 1

[0073] 1) 0.2 parts of powdered carbon nanotubes were ultrasonically dispersed in 50 parts of isopropanol solution to obtain mixture A;

[0074] 2) Add 4 parts of deionized water and 1 part of ammonia (30%) to mixture A in sequence, stir at 1000 r / min for 10 min, add 0.1 parts of silica sol and 0.3 parts of tetraethyl orthosilicate, stir at 1500 r / min for 1 h to obtain mixture B;

[0075] 3) Add 0.5 parts of heptadecafluorodecyltrimethoxysilane and 1 part of alkyl sulfonate dropwise to mixture B, stir for 24 h to obtain a reflective film surface coating solution.

[0076] 4) Use a corona treatment machine to treat the surface of the reflective film to give it a rough surface. The output frequency of the corona treatment machine is 15kHz and the electrode gap is 1.3mm.

[0077] 5) Spray the above-mentioned reflective film surface coating solution onto the surface of the reflective film layer after corona treatment, and obtain the anti-fouling reflective film after natural drying.

[0078] Example 2

[0079] 1) 0.6 parts of powdered carbon nanotubes were ultrasonically dispersed in 50 parts of isopropanol solution to obtain mixture A;

[0080] 2) Add 4 parts of deionized water and 4 parts of ammonia (28%) to mixture A in sequence, stir at 1000 r / min for 10 min, add 0.1 parts of silica sol and 0.6 parts of tetraethyl orthosilicate, stir at 1500 r / min for 1 h to obtain mixture B;

[0081] 3) Add 0.5 parts of heptadecafluorodecyltrimethoxysilane and 1 part of alkyl sulfonate dropwise to mixture B, stir for 24 h to obtain a reflective film surface coating solution.

[0082] 4) Use a corona treatment machine to treat the surface of the reflective film to give it a rough surface. The output frequency of the corona treatment machine is 16kHz and the electrode gap is 1.3mm.

[0083] 5) Spray the above-mentioned reflective film surface coating solution onto the surface of the reflective film layer after corona treatment, and obtain the anti-fouling reflective film after natural drying.

[0084] Example 3

[0085] 1) One part of powdered carbon nanotubes was ultrasonically dispersed in 100 parts of isopropanol solution to obtain mixture A;

[0086] 2) Add 6 parts of deionized water and 2 parts of ammonia (26%) to mixture A in sequence, stir at 1000 r / min for 10 min, add 0.2 parts of silica sol and 0.9 parts of tetraethyl orthosilicate, stir at 1500 r / min for 1 h to obtain mixture B;

[0087] 3) Add 1 part heptadecafluorodecyltrimethoxysilane and 2 parts dealkyl sulfonate dropwise to mixture B, stir for 24 h to obtain a reflective film surface coating solution.

[0088] 4) Use a corona treatment machine to treat the surface of the reflective film to give it a rough surface. The output frequency of the corona treatment machine is 16kHz and the electrode gap is 1.4mm.

[0089] 5) Spray the above-mentioned reflective film surface coating solution onto the surface of the reflective film layer after corona treatment, and obtain the anti-fouling reflective film after natural drying.

[0090] Example 4

[0091] 1) 1.5 parts of powdered carbon nanotubes were ultrasonically dispersed in 100 parts of isopropanol solution to obtain mixture A;

[0092] 2) Add 6 parts of deionized water and 2 parts of ammonia (25%) to mixture A in sequence, stir at 1000 r / min for 10 min, add 0.2 parts of silica sol and 1 part of tetraethyl orthosilicate, stir at 1500 r / min for 1 h to obtain mixture B;

[0093] 3) Add 1.5 parts of heptadecafluorodecyltrimethoxysilane and 2 parts of alkyl sulfonate dropwise to mixture B, stir for 24 h to obtain a reflective film surface coating solution.

[0094] 4) Use a corona treatment machine to treat the surface of the reflective film to give it a rough surface. The output frequency of the corona treatment machine is 17kHz and the electrode gap is 1.4mm.

[0095] 5) Spray the above-mentioned reflective film surface coating solution onto the surface of the reflective film layer after corona treatment, and obtain the anti-fouling reflective film after natural drying.

[0096] Example 5

[0097] 1) Two parts of powdered carbon nanotubes were ultrasonically dispersed in 200 parts of isopropanol solution to obtain mixture A;

[0098] 2) Add 8 parts of deionized water and 4 parts of ammonia (24%) to mixture A in sequence, stir at 1000 r / min for 10 min, add 0.3 parts of silica sol and 1.2 parts of tetraethyl orthosilicate, stir at 1500 r / min for 1 h to obtain mixture B;

[0099] 3) Add 1.5 parts of heptadecafluorodecyltrimethoxysilane and 3 parts of alkyl sulfonate dropwise to mixture B, stir for 24 hours, and obtain a reflective film surface coating solution.

[0100] 4) Use a corona treatment machine to treat the surface of the reflective film to give it a rough surface. The output frequency of the corona treatment machine is 18kHz and the electrode gap is 1.5mm.

[0101] 5) Spray the above-mentioned reflective film surface coating solution onto the surface of the reflective film layer after corona treatment, and obtain the anti-fouling reflective film after natural drying.

[0102] Example 6

[0103] 1) Two parts of powdered carbon nanotubes were ultrasonically dispersed in 100 parts of isopropanol solution to obtain mixture A;

[0104] 2) Add 8 parts of deionized water and 4 parts of ammonia (22%) to mixture A in sequence, stir at 1000 r / min for 10 min, add 0.3 parts of silica sol and 1.5 parts of tetraethyl orthosilicate, stir at 1500 r / min for 1 h to obtain mixture B;

[0105] 3) Add 2 parts heptadecafluorodecyltriethoxysilane and 3 parts alkyl dithiocarbamate dropwise to mixture B, stir for 24 h, and obtain a reflective film surface coating solution.

[0106] 4) Use a corona treatment machine to treat the surface of the reflective film to give it a rough surface. The output frequency of the corona treatment machine is 18kHz and the electrode gap is 1.5mm.

[0107] 5) Spray the above-mentioned reflective film surface coating solution onto the surface of the reflective film layer after corona treatment, and obtain the anti-fouling reflective film after natural drying.

[0108] Example 7

[0109] 1) 0.6 parts of powdered carbon nanotubes were ultrasonically dispersed in 50 parts of isopropanol solution to obtain mixture A;

[0110] 2) Add 4 parts of deionized water and 4 parts of ammonia (20%) to mixture A in sequence, stir at 1000 r / min for 10 min, add 0.1 parts of silica sol and 0.6 parts of tetraethyl orthosilicate, stir at 1500 r / min for 1 h to obtain mixture B;

[0111] 3) Add 0.5 parts of heptadecafluorodecyltriethoxysilane and 1 part of alkyl phosphate dropwise to mixture B, stir for 24 h to obtain a reflective film surface coating solution.

[0112] 4) Use a corona treatment machine to treat the surface of the reflective film to give it a rough surface. The output frequency of the corona treatment machine is 16kHz and the electrode gap is 1.3mm.

[0113] 5) Spray the above-mentioned reflective film surface coating solution onto the surface of the reflective film layer after corona treatment, and obtain the anti-fouling reflective film after natural drying.

[0114] Comparative Example 1

[0115] The method is basically the same as Example 2, except that deionized water is not added in Example 2, and 8 parts of ammonia water with a concentration of 30% are added.

[0116] Comparative Example 2

[0117] It is basically the same as Example 2, except that the carbon nanotubes in Example 2 are not added.

[0118] Comparative Example 3

[0119] It is basically the same as Example 2, except that the heptadecafluorodecyltrimethoxysilane in Example 2 is replaced with tridecafluorooctyltrimethoxysilane.

[0120] Comparative Example 4

[0121] It is basically the same as Example 2, except that the heptadecafluorodecyltrimethoxysilane in Example 2 is replaced with dodecafluoroheptylpropyltrimethoxysilane.

[0122] Comparative Example 5

[0123] It is basically the same as Example 2, except that the antistatic agent in Example 2 is not added.

[0124] Comparative Example 6

[0125] Without any coating, we directly use reflective film, model 7910, manufactured by ORAFOL in Germany.

[0126] The reflective films prepared in Examples 1-7 and Comparative Examples 1-6 were tested for contact angle, anti-fogging performance, anti-fouling performance and aging resistance, respectively.

[0127] 1) Contact angle test: Use a contact angle tester to test the contact angle of water droplets on the surface layer of the reflective film.

[0128] The specific method is as follows: use double-sided tape to fix the test sample on a horizontal sample stage, use a micro sampler to drop 5μL of water onto the coating surface, use a contact angle tester to measure the static contact angle of the sample surface, and take the average value of the contact angles at 5 different points on the sample surface as the measurement result.

[0129] 2) Anti-fog performance test

[0130] Take a cup of hot water at a temperature of about 80℃, place the superhydrophobic side of the prepared reflective film above the hot water cup, 10cm above the water surface, at a 45-degree angle to the horizontal, and observe after 1 minute whether water droplets form on the surface of the reflective film.

[0131] 3) Antifouling performance test

[0132] Wastewater was simulated using a mixture of toner powder. The reflective film was placed vertically, and 100 mL of wastewater was sprayed onto the surface of the reflective film. The presence of toner powder particles was then observed.

[0133] 4) Weather resistance

[0134] The prepared reflective film was placed in an aging test chamber under simulated outdoor environmental conditions, and its weather resistance was tested according to the test method in GB / T16422.2 standard. After the aging test for the specified time, the sample was thoroughly rinsed with clean water, wiped dry with a soft cloth, and then the contact angle, anti-fog performance and anti-fouling performance were tested respectively.

[0135] The performance test structure is shown in Table 1.

[0136] Table 1. Results of reflective film performance tests

[0137]

[0138]

[0139] The results show that, compared with the comparative examples, the surface coating on the antifouling reflective film prepared in Examples 1-7 gives the reflective film surface layer excellent superhydrophobic properties (contact angle > 150°). It has a large contact angle with water droplets, thus preventing the formation of fine water droplets on the reflective film surface under temperature changes, exhibiting excellent anti-fogging performance and effectively preventing frost and fogging of water vapor on the reflective film surface. The reflective film prepared using this invention has excellent self-cleaning properties, effectively resisting the adhesion of external dust and other particulate pollutants to its surface, ensuring the cleanliness of the reflective film surface and guaranteeing its good reflective effect. Furthermore, the antifouling coating and reflective film prepared by this invention also have excellent weather resistance; even after long-term outdoor use, they still maintain good anti-frost, anti-dew, and self-cleaning effects, which will help extend the service life of the reflective film.

[0140] This invention can be applied to, but is not limited to, traffic reflective materials. It can also be applied to fields such as aircraft anti-icing, glass self-cleaning, ship corrosion prevention, and anti-bioadhesion in building materials and medical devices.

[0141] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0142] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A reflective film surface coating, characterized in that, By weight, it includes the following raw material components: The fluorosilane is selected from at least one of heptadecafluorodecyltrimethoxysilane and heptadecafluorodecyltriethoxysilane; the volume concentration of the ammonia water is 20% to 30%.

2. The reflective film surface coating as described in claim 1, characterized in that, It includes the following raw material components:

3. The reflective film surface coating as described in any one of claims 1 to 2, characterized in that, The carbon nanotubes are multi-walled carbon nanotubes.

4. The reflective film surface coating as described in any one of claims 1 to 2, characterized in that, The static eliminator is selected from at least one of alkyl sulfonates, alkyl phosphates, and alkyl dithiocarbamates.

5. The method for preparing the reflective film surface coating as described in any one of claims 1 to 4, characterized in that, Includes the following steps: Mixture A is prepared by mixing carbon nanotubes and isopropanol; Mixture A, water and ammonia water are mixed and stirred. Silica sol and tetraethyl orthosilicate are then added to prepare mixture B. Mixture B, fluorosilane, and antistatic agent are mixed to prepare the raw material solution for the reflective film surface coating; The raw material liquid is coated onto the substrate and then dried.

6. A kind of anti-fouling reflective film, characterized in that, The reflective film includes a reflective film and a reflective film surface coating, wherein the reflective film surface coating is the reflective film surface coating according to any one of claims 1 to 4, and the reflective film surface coating is disposed on at least one side surface of the reflective film.

7. The anti-fouling reflective film as described in claim 6, characterized in that, The reflective film is a microprism reflective film, which includes a face film layer, a prism reflective layer, an adhesive layer and a release layer stacked in sequence, with the surface coating of the reflective film located on the face film layer.

8. The anti-fouling reflective film as described in claim 7, characterized in that, The mask layer material is selected from PET, PVC and PMMA.

9. The anti-fouling reflective film as described in claim 7, characterized in that, The adhesive layer material is polyacrylate pressure-sensitive adhesive.

10. A method for preparing an anti-fouling reflective film, characterized in that, Includes the following steps: The surface of the reflective film is treated to give it a rough surface; The raw material liquid of the reflective film surface coating according to any one of claims 1 to 4 is applied to the surface of the reflective film, and after drying, a reflective film surface coating is formed on the surface of the reflective film.

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