Aluminum ceiling with super-hydrophobic surface and preparation method thereof
By cleaning and etching the surface of the aluminum ceiling and preparing superhydrophobic coatings using modified materials, the problem of traditional aluminum ceilings being easily contaminated is solved, and the superhydrophobic performance of aluminum ceilings is improved and maintenance costs are reduced. It is suitable for Waterproof, stain-proof and self-cleaning needs of modern buildings.
Patent Information
- Application Number
- CN202411075718.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2024-12-13
AI Technical Summary
The surface of traditional aluminum ceilings is susceptible to erosion by pollutants such as water and oil pollution, which affects the beauty and increases maintenance costs, making it difficult to meet the needs of modern buildings for waterproof, pollution-proof and self-cleaning.
By surface cleaning and etching of aluminum plates, superhydrophobic coatings were prepared using modified titanium dioxide powder, modified polyvinylidene fluoride and epoxy resin, and n-octyl triethoxysilane and thirteen fluoro n-octylsilane and petroleum ether are raw materials to prepare auxiliary coating components, spray and cure at high temperature to form an aluminum ceiling with superhydrophobic properties.
It significantly improves the waterproof, anti-fouling and self-cleaning performance of aluminum ceilings, extends service life and reduces maintenance costs, and provides anti-freeze protection in cold environments.
Smart Images
Figure SMS_1
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of aluminum plates, and in particular to an aluminum ceiling with a super-hydrophobic surface and a preparation method thereof. Background Art
[0002] With the continuous development of modern construction technology, the functional requirements for building materials are also increasing. Especially in terms of waterproofing, anti-fouling, self-cleaning, etc., traditional building materials are often difficult to meet the needs of modern buildings. As a new type of functional material, super-hydrophobic surface materials have significant advantages in waterproofing, anti-fouling, self-cleaning, etc. due to their unique surface properties. Therefore, their application prospects in the field of building materials are very broad. Super-hydrophobic surface refers to a surface on which the contact angle of water droplets on its surface is greater than 150°. This surface has extremely strong hydrophobicity and self-cleaning properties. Water droplets cannot stay on its surface and can slide down quickly, thereby effectively preventing pollutants such as moisture and oil from gathering on the surface and keeping the surface clean and dry. The preparation of super-hydrophobic surface mainly depends on the construction of surface micro-nano structure and the modification of low surface energy substances. By controlling the morphology and size of the surface micro-nano structure and selecting suitable low surface energy substances, a surface with excellent super-hydrophobic properties can be prepared.
[0003] As a common building material, aluminum ceilings have been widely used in the field of architectural decoration due to their advantages such as light weight, beautiful appearance and corrosion resistance. However, the surface of traditional aluminum ceilings is easily corroded by pollutants such as water and oil, which not only affects the appearance but also increases the maintenance cost. Therefore, applying superhydrophobic technology to the surface preparation of aluminum ceilings can not only improve its waterproof, anti-fouling and self-cleaning properties, but also extend its service life and reduce maintenance costs, which has important practical application value. Summary of the invention
[0004] Technical issues solved In view of the above-mentioned shortcomings of the prior art, the present invention provides an aluminum ceiling with a super-hydrophobic surface and a preparation method thereof, aiming to prepare an aluminum ceiling with super-hydrophobic properties.
[0005] Technical Solution To achieve the above objectives, the present invention is implemented through the following technical solutions: A method for preparing an aluminum ceiling with a super-hydrophobic surface, the preparation method comprising: S1, performing surface cleaning and surface etching on the aluminum plate, and the obtained surface is recorded as the pre-treated aluminum plate; S2, preparing a super hydrophobic coating component using modified titanium dioxide powder, modified polyvinylidene fluoride and epoxy resin as raw materials; S3, preparing an auxiliary coating component using n-octyltriethoxysilane, tridecafluoro-n-octylsilane and petroleum ether as raw materials; S4. Spray the super-hydrophobic coating component evenly on the surface of the pretreated aluminum plate with a spray gun, dry the coating naturally and then cure it at high temperature, then immerse it in an auxiliary coating component heated to 55° C. and soak it for 1 hour. After taking it out, dry it to obtain an aluminum ceiling with a super-hydrophobic surface.
[0006] Furthermore, in S1, the surface cleaning method is: polishing the surface of the aluminum plate with 1200 grit sandpaper, then placing it in pure water, acetone and anhydrous ethanol in turn for ultrasonic dispersion at a frequency of 26-28 kHz for 5 minutes, and finally drying it at a temperature of 45°C.
[0007] Furthermore, in S1, the surface etching treatment method is: a hydrochloric acid solution with a concentration of 1 mol / L and a hydrogen peroxide solution with a concentration of 1 mol / L are mixed in an equal volume ratio, stirred at a stirring speed of 400-500 r / min for 5 minutes and recorded as an etching solution, then the aluminum plate after the surface cleaning treatment is immersed in the etching solution for 15 minutes, and then the aluminum plate is taken out and immersed in pure water for ultrasonic dispersion at a frequency of 26-28 kHz for 5 minutes, and finally immersed in a 50°C water bath for heating for 1 hour and placed in a vacuum drying oven at 48°C for 1 hour.
[0008] Furthermore, in S2, the method for modifying the titanium dioxide powder is: weigh 10g of nano-silica, 0.5g of silane coupling agent KH-560 and 200mL of 90% ethanol aqueous solution, mix them, add 0.1mol / L hydrochloric acid solution to adjust the pH value to 6, stir at a stirring speed of 200r / min for 4-5h to react, and after the reaction is completed, place it in an oven at 80°C and dry it for 24h, and grind it through a 200-mesh sieve to obtain the modified titanium dioxide powder.
[0009] Furthermore, in S2, the method for modifying polyvinylidene fluoride is: weigh 10g of polyvinylidene fluoride and disperse it in 200mL of 50% ethanol aqueous solution, add 4g of sodium hydroxide and stir the reaction at a stirring speed of 100r / min in a water bath at 40°C for 12h, then place it in an oven at 80°C and dry it for 24h, and grind it through a 200-mesh sieve to obtain the modified polyvinylidene fluoride.
[0010] Furthermore, in S2, the preparation steps of the super hydrophobic coating component are: Step 1, weigh 2g of epoxy resin and dissolve it in 10mL of ethyl acetate, then add 3mL of N-methyl-2-pyrrolidone, 0.6g of perfluoroethylene propylene copolymer, 0.8g of modified titanium dioxide powder and 0.4g of modified polyvinylidene fluoride, mix well and record the result as mixed component; Step 2: After ultrasonically dispersing the mixed components, 0.2 mL of polydimethylsiloxane was added, and after magnetic stirring for 1 hour, 0.3 g of maleic anhydride was added, and the magnetic stirring was continued for 15 minutes to obtain the super-hydrophobic coating component.
[0011] Furthermore, in step 1, the uniform mixing operation is performed at a stirring speed of 500 r / min for 10 min, and in step 2, the ultrasonic dispersion operation is performed at a frequency of 28 kHz for 30 min, and the magnetic stirring speed is 300 r / min.
[0012] Furthermore, in S3, the preparation method of the auxiliary coating component is: weigh 0.1g of n-octyltriethoxysilane, 0.1g of tridecafluorooctylsilane and 100g of petroleum ether, mix them, stir them at a stirring speed of 500r / min for 20min in a water bath at 35°C, and the result is the auxiliary coating component.
[0013] Furthermore, the high temperature curing method in S4 is: first curing in an oven at 100°C for 30 minutes, then curing at 210°C for 90 minutes, and the drying method in S4 is drying in an oven at 120°C for 4 hours.
[0014] The invention discloses an aluminum ceiling with a super hydrophobic surface, which is prepared by a method for preparing the aluminum ceiling with a super hydrophobic surface.
[0015] Beneficial Effects 1. The present invention provides an aluminum ceiling with a super-hydrophobic surface and a preparation method thereof. Compared with the prior art, the present invention has the following beneficial effects: 2. The present invention first etches the surface of the aluminum plate with hydrochloric acid and hydrogen peroxide. The combination of hydrochloric acid and hydrogen peroxide can effectively etch the surface of the aluminum plate, improve the roughness of the surface of the aluminum plate, and form a micron-level stepped rough structure on the surface of the aluminum plate, thereby providing a better foundation in the subsequent hydrophobic treatment, so that the hydrophobic coating can be more evenly covered on the surface of the aluminum plate; secondly, the super-hydrophobic coating of the aluminum plate is prepared with silicon dioxide modified by a silane coupling agent, modified polyvinylidene fluoride and epoxy resin as raw materials, which can effectively prevent the accumulation of moisture and other liquids on the surface of the aluminum plate and reduce the risk of corrosion and pollution. The silane coupling agent can improve the interfacial compatibility between silicon dioxide and polyvinylidene fluoride and enhance the interaction between the two. The introduction of the silane coupling agent not only enhances the interaction between nano-silicon dioxide and polyvinylidene fluoride in the coating, but also improves the bonding force between the coating and the aluminum plate substrate, making the coating more stable.
[0016] The present invention uses n-octyltriethoxysilane, tridecafluoro-n-octylsilane and petroleum ether as raw materials to prepare auxiliary coating components, and sprays the auxiliary coating components on the surface of the aluminum plate, which can not only further enhance the super-hydrophobic performance of the aluminum plate, but also improve the self-cleaning ability and weather resistance of the coating, reduce the adhesion of low-temperature substances such as ice and snow on the surface of the aluminum plate, thereby achieving an antifreeze effect. Combining the advantages of n-octyltriethoxysilane and tridecafluoro-n-octylsilane, a coating that is both hydrophobic and antifreeze can be prepared, thereby providing effective protection for the application of aluminum ceilings in cold environments. DETAILED DESCRIPTION
[0017] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0018] The present invention will be further described below in conjunction with the embodiments.
[0019] Example 1 A method for preparing an aluminum ceiling with a super-hydrophobic surface in this embodiment is as follows: S1, performing surface cleaning and surface etching on the aluminum plate, and the obtained surface is recorded as the pre-treated aluminum plate; S2, preparing a super hydrophobic coating component using modified titanium dioxide powder, modified polyvinylidene fluoride and epoxy resin as raw materials; S3, preparing an auxiliary coating component using n-octyltriethoxysilane, tridecafluoro-n-octylsilane and petroleum ether as raw materials; S4. Spray the super-hydrophobic coating component evenly on the surface of the pretreated aluminum plate with a spray gun, dry the coating naturally and then cure it at high temperature, then immerse it in an auxiliary coating component heated to 55° C. and soak it for 1 hour. After taking it out, dry it to obtain an aluminum ceiling with a super-hydrophobic surface.
[0020] In S1, the surface cleaning method is: the surface of the aluminum plate is polished with 1200-grit sandpaper, then ultrasonically dispersed in pure water, acetone and anhydrous ethanol at a frequency of 26 kHz for 5 minutes, and finally dried at a temperature of 45°C.
[0021] In S1, the surface etching treatment method is: a hydrochloric acid solution with a concentration of 1 mol / L and a hydrogen peroxide solution with a concentration of 1 mol / L are mixed in an equal volume ratio, stirred at a stirring speed of 400 r / min for 5 minutes and recorded as an etching solution, then the aluminum plate after the surface cleaning treatment is immersed in the etching solution for 15 minutes, and then the aluminum plate is taken out and immersed in pure water for ultrasonic dispersion at a frequency of 26 kHz for 5 minutes, and finally immersed in a 50°C water bath for heating for 1 hour and placed in a vacuum drying oven at 48°C for 1 hour.
[0022] In S2, the method for modifying titanium dioxide powder is as follows: 10 g of nano-silica, 0.5 g of silane coupling agent KH-560 and 200 mL of 90% ethanol aqueous solution are weighed and mixed, 0.1 mol / L hydrochloric acid solution is added dropwise to adjust the pH value to 6, and the mixture is stirred at a stirring speed of 200 r / min for 4 h for reaction. After the reaction is completed, the mixture is placed in an oven at 80° C. and dried for 24 h. The modified titanium dioxide powder is obtained after grinding through a 200-mesh sieve.
[0023] In S2, the method for modifying polyvinylidene fluoride is as follows: 10 g of polyvinylidene fluoride is weighed and dispersed in 200 mL of 50% ethanol aqueous solution, 4 g of sodium hydroxide is added, and the mixture is stirred at a stirring speed of 100 r / min for 12 hours in a water bath at 40°C, and then dried in an oven at 80°C for 24 hours. The modified polyvinylidene fluoride is obtained after grinding through a 200-mesh sieve.
[0024] In S2, the preparation steps of the super hydrophobic coating component are: Step 1, weigh 2g of epoxy resin and dissolve it in 10mL of ethyl acetate, then add 3mL of N-methyl-2-pyrrolidone, 0.6g of perfluoroethylene propylene copolymer, 0.8g of modified titanium dioxide powder and 0.4g of modified polyvinylidene fluoride, stir at a stirring speed of 500r / min for 10min, and the result is recorded as a mixed component; Step 2: After ultrasonically dispersing the mixed components at a frequency of 28 kHz for 30 minutes, 0.2 mL of polydimethylsiloxane was added, and after magnetic stirring at a stirring speed of 300 r / min for 1 hour, 0.3 g of maleic anhydride was added, and the magnetic stirring was continued for 15 minutes to obtain the superhydrophobic coating component.
[0025] In S3, the preparation method of the auxiliary coating component is: weigh 0.1g of n-octyltriethoxysilane, 0.1g of tridecafluorooctylsilane and 100g of petroleum ether, mix them, stir them at a stirring speed of 500r / min for 20min in a water bath at 35°C, and the result is the auxiliary coating component.
[0026] The high temperature curing method in S4 is: first place it in an oven at 100°C for curing for 30 minutes, then place it at 210°C for further curing for 90 minutes. The drying method in S4 is to place it in an oven at 120°C for drying for 4 hours.
[0027] The invention discloses an aluminum ceiling with a super hydrophobic surface, which is prepared by a method for preparing the aluminum ceiling with a super hydrophobic surface.
[0028] Example 2 A method for preparing an aluminum ceiling with a super-hydrophobic surface in this embodiment is as follows: S1, performing surface cleaning and surface etching on the aluminum plate, and the obtained surface is recorded as the pre-treated aluminum plate; S2, preparing a super hydrophobic coating component using modified titanium dioxide powder, modified polyvinylidene fluoride and epoxy resin as raw materials; S3, preparing an auxiliary coating component using n-octyltriethoxysilane, tridecafluoro-n-octylsilane and petroleum ether as raw materials; S4. Spray the super-hydrophobic coating component evenly on the surface of the pretreated aluminum plate with a spray gun, dry the coating naturally and then cure it at high temperature, then immerse it in an auxiliary coating component heated to 55° C. and soak it for 1 hour. After taking it out, dry it to obtain an aluminum ceiling with a super-hydrophobic surface.
[0029] In S1, the surface cleaning method is as follows: the surface of the aluminum plate is polished with 1200-grit sandpaper, then ultrasonically dispersed in pure water, acetone, and anhydrous ethanol at a frequency of 28 kHz for 5 minutes, and finally dried at a temperature of 45°C.
[0030] In S1, the surface etching treatment method is: a hydrochloric acid solution with a concentration of 1 mol / L and a hydrogen peroxide solution with a concentration of 1 mol / L are mixed in an equal volume ratio, stirred at a stirring speed of 500 r / min for 5 minutes and recorded as an etching solution, then the aluminum plate after the surface cleaning treatment is immersed in the etching solution for 15 minutes, and then the aluminum plate is taken out and immersed in pure water for ultrasonic dispersion at a frequency of 28 kHz for 5 minutes, and finally immersed in a 50°C water bath for heating for 1 hour and placed in a vacuum drying oven at 48°C for 1 hour.
[0031] In S2, the method for modifying titanium dioxide powder is as follows: 10 g of nano-silica, 0.5 g of silane coupling agent KH-560 and 200 mL of 90% ethanol aqueous solution are weighed and mixed, 0.1 mol / L hydrochloric acid solution is added dropwise to adjust the pH value to 6, and the mixture is stirred at a stirring speed of 200 r / min for 5 h for reaction. After the reaction is completed, the mixture is placed in an oven at 80° C. and dried for 24 h. The modified titanium dioxide powder is obtained after grinding through a 200-mesh sieve.
[0032] In S2, the method for modifying polyvinylidene fluoride is as follows: 10 g of polyvinylidene fluoride is weighed and dispersed in 200 mL of 50% ethanol aqueous solution, 4 g of sodium hydroxide is added, and the mixture is stirred at a stirring speed of 100 r / min for 12 hours in a water bath at 40°C, and then dried in an oven at 80°C for 24 hours. The modified polyvinylidene fluoride is obtained after grinding through a 200-mesh sieve.
[0033] In S2, the preparation steps of the super hydrophobic coating component are: Step 1, weigh 2g of epoxy resin and dissolve it in 10mL of ethyl acetate, then add 3mL of N-methyl-2-pyrrolidone, 0.6g of perfluoroethylene propylene copolymer, 0.8g of modified titanium dioxide powder and 0.4g of modified polyvinylidene fluoride, stir at a stirring speed of 500r / min for 10min, and the result is recorded as a mixed component; Step 2: After ultrasonically dispersing the mixed components at a frequency of 28 kHz for 30 minutes, 0.2 mL of polydimethylsiloxane was added, and after magnetic stirring at a stirring speed of 300 r / min for 1 hour, 0.3 g of maleic anhydride was added, and the magnetic stirring was continued for 15 minutes to obtain the superhydrophobic coating component.
[0034] In S3, the preparation method of the auxiliary coating component is: weigh 0.1g of n-octyltriethoxysilane, 0.1g of tridecafluorooctylsilane and 100g of petroleum ether, mix them, stir them at a stirring speed of 500r / min for 20min in a water bath at 35°C, and the result is the auxiliary coating component.
[0035] The high temperature curing method in S4 is: first place it in an oven at 100°C for curing for 30 minutes, then place it at 210°C for further curing for 90 minutes. The drying method in S4 is to place it in an oven at 120°C for drying for 4 hours.
[0036] The invention discloses an aluminum ceiling with a super hydrophobic surface, which is prepared by a method for preparing the aluminum ceiling with a super hydrophobic surface.
[0037] Example 3 A method for preparing an aluminum ceiling with a super-hydrophobic surface in this embodiment is as follows: S1, performing surface cleaning and surface etching on the aluminum plate, and the obtained surface is recorded as the pre-treated aluminum plate; S2, preparing a super hydrophobic coating component using modified titanium dioxide powder, modified polyvinylidene fluoride and epoxy resin as raw materials; S3, preparing an auxiliary coating component using n-octyltriethoxysilane, tridecafluoro-n-octylsilane and petroleum ether as raw materials; S4. Spray the super-hydrophobic coating component evenly on the surface of the pretreated aluminum plate with a spray gun, dry the coating naturally and then cure it at high temperature, then immerse it in an auxiliary coating component heated to 55° C. and soak it for 1 hour. After taking it out, dry it to obtain an aluminum ceiling with a super-hydrophobic surface.
[0038] In S1, the surface cleaning method is: the surface of the aluminum plate is polished with 1200-grit sandpaper, then ultrasonically dispersed in pure water, acetone and anhydrous ethanol at a frequency of 27 kHz for 5 minutes, and finally dried at a temperature of 45°C.
[0039] In S1, the surface etching treatment method is: a hydrochloric acid solution with a concentration of 1 mol / L and a hydrogen peroxide solution with a concentration of 1 mol / L are mixed in an equal volume ratio, stirred at a stirring speed of 500 r / min for 5 minutes and recorded as an etching solution, then the aluminum plate after the surface cleaning treatment is immersed in the etching solution for 15 minutes, and then the aluminum plate is taken out and immersed in pure water for ultrasonic dispersion at a frequency of 27 kHz for 5 minutes, and finally immersed in a 50°C water bath for heating for 1 hour and placed in a vacuum drying oven at 48°C for 1 hour.
[0040] In S2, the method for modifying titanium dioxide powder is as follows: 10 g of nano-silica, 0.5 g of silane coupling agent KH-560 and 200 mL of 90% ethanol aqueous solution are weighed and mixed, 0.1 mol / L hydrochloric acid solution is added dropwise to adjust the pH value to 6, and the mixture is stirred at a stirring speed of 200 r / min for 5 h for reaction. After the reaction is completed, the mixture is placed in an oven at 80° C. and dried for 24 h. The modified titanium dioxide powder is obtained after grinding through a 200-mesh sieve.
[0041] In S2, the method for modifying polyvinylidene fluoride is as follows: 10 g of polyvinylidene fluoride is weighed and dispersed in 200 mL of 50% ethanol aqueous solution, 4 g of sodium hydroxide is added, and the mixture is stirred at a stirring speed of 100 r / min for 12 hours in a water bath at 40°C, and then dried in an oven at 80°C for 24 hours. The modified polyvinylidene fluoride is obtained after grinding through a 200-mesh sieve.
[0042] In S2, the preparation steps of the super hydrophobic coating component are: Step 1, weigh 2g of epoxy resin and dissolve it in 10mL of ethyl acetate, then add 3mL of N-methyl-2-pyrrolidone, 0.6g of perfluoroethylene propylene copolymer, 0.8g of modified titanium dioxide powder and 0.4g of modified polyvinylidene fluoride, stir at a stirring speed of 500r / min for 10min, and the result is recorded as a mixed component; Step 2: After ultrasonically dispersing the mixed components at a frequency of 28 kHz for 30 minutes, 0.2 mL of polydimethylsiloxane was added, and after magnetic stirring at a stirring speed of 300 r / min for 1 hour, 0.3 g of maleic anhydride was added, and the magnetic stirring was continued for 15 minutes to obtain the superhydrophobic coating component.
[0043] In S3, the preparation method of the auxiliary coating component is: weigh 0.1g of n-octyltriethoxysilane, 0.1g of tridecafluorooctylsilane and 100g of petroleum ether, mix them, stir them at a stirring speed of 500r / min for 20min in a water bath at 35°C, and the result is the auxiliary coating component.
[0044] The high temperature curing method in S4 is: first place it in an oven at 100°C for curing for 30 minutes, then place it at 210°C for further curing for 90 minutes. The drying method in S4 is to place it in an oven at 120°C for drying for 4 hours.
[0045] The invention discloses an aluminum ceiling with a super hydrophobic surface, which is prepared by a method for preparing the aluminum ceiling with a super hydrophobic surface.
[0046] Comparative Example 1 The aluminum ceiling with a super-hydrophobic surface and the preparation method thereof provided in this comparative example are substantially the same as those in Example 1, with the main difference being that in this comparative example 1, the modified titanium dioxide powder in Example 1 is replaced with unmodified nano titanium dioxide.
[0047] Comparative Example 2 The aluminum ceiling with a super-hydrophobic surface and the preparation method thereof provided in this comparative example are substantially the same as those in Example 1, with the main difference being that in this comparative example 2, the modified polyvinylidene fluoride in Example 1 is replaced with unmodified polyvinylidene fluoride.
[0048] Comparative Example 3 The aluminum ceiling with a super-hydrophobic surface and the preparation method thereof provided in this comparative example are substantially the same as those in Example 1, with the main difference being that in this comparative example 3, the auxiliary coating component in Example 1 is replaced with pure water.
[0049] Performance Testing The aluminum ceilings with super-hydrophobic surfaces in Examples 1-3 and Comparative Examples 1-3 are marked as Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2 and Comparative Example 3, respectively. Then, the performances of Examples 1-3 and Comparative Examples 1-3 are tested. The specific test items are: 1. The hydrophobic properties of Examples 1-3 and Comparative Examples 1-3 were tested by contact angle, and the obtained data were recorded in the following table; 2. Drop water containing dust on the surfaces of Examples 1-3 and Comparative Examples 1-3, and the self-cleaning performance is represented by the ease with which the water droplets are blown off. The easier it is to be blown off, the better the self-cleaning ability is. The grades are excellent, good, fair and poor, respectively. The obtained data are recorded in the following table; 3. Place Examples 1-3 and Comparative Examples 1-3 in an environment of 0°C, spray water on their surfaces and record the time it takes for water to condense into ice. The longer the time, the better the antifreeze performance. The grades are excellent, good, fair and poor, respectively. The obtained data are recorded in the table below.
[0050]
[0051] It can be seen from the data in the above table that the aluminum ceiling with super hydrophobic surface in Examples 1-3 has better hydrophobic performance than that in Comparative Examples 1-3, and has more excellent self-cleaning performance and antifreeze performance, indicating that the aluminum ceiling with super hydrophobic surface prepared by the present invention has excellent market promotion value.
[0052] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0053] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A method for preparing an aluminum ceiling with a super-hydrophobic surface, It is characterized in that The preparation method is: S1, performing surface cleaning and surface etching on the aluminum plate, and the obtained surface is recorded as the pre-treated aluminum plate; S2, preparing a super hydrophobic coating component using modified titanium dioxide powder, modified polyvinylidene fluoride and epoxy resin as raw materials; S3, preparing an auxiliary coating component using n-octyltriethoxysilane, tridecafluoro-n-octylsilane and petroleum ether as raw materials; S4. Spray the super-hydrophobic coating component evenly on the surface of the pretreated aluminum plate with a spray gun, dry the coating naturally and then cure it at high temperature, then immerse it in an auxiliary coating component heated to 55° C. and soak it for 1 hour. After taking it out, dry it to obtain an aluminum ceiling with a super-hydrophobic surface.
2. The method for preparing an aluminum ceiling having a super-hydrophobic surface according to claim 1, It is characterized in that In S1, the surface cleaning method is: the surface of the aluminum plate is polished with 1200-grit sandpaper, then ultrasonically dispersed in pure water, acetone and anhydrous ethanol at a frequency of 26-28 kHz for 5 minutes, and finally dried at a temperature of 45°C.
3. The method for preparing an aluminum ceiling having a super-hydrophobic surface according to claim 1, It is characterized in that In S1, the surface etching treatment method is: a hydrochloric acid solution with a concentration of 1 mol / L and a hydrogen peroxide solution with a concentration of 1 mol / L are mixed in an equal volume ratio, stirred at a stirring speed of 400-500 r / min for 5 minutes and recorded as an etching solution, then the aluminum plate after the surface cleaning treatment is immersed in the etching solution for 15 minutes, and then the aluminum plate is taken out and immersed in pure water for ultrasonic dispersion at a frequency of 26-28 kHz for 5 minutes, and finally immersed in a 50°C water bath for heating for 1 hour and placed in a vacuum drying oven at 48°C for 1 hour.
4. The method for preparing an aluminum ceiling having a super-hydrophobic surface according to claim 1, It is characterized in that In S2, the method for modifying titanium dioxide powder is: weigh 10g of nano-silica, 0.5g of silane coupling agent KH-560 and 200mL of 90% ethanol aqueous solution, mix them, add 0.1mol / L hydrochloric acid solution to adjust the pH value to 6, stir at a stirring speed of 200r / min for 4-5h to react, place in an oven at 80°C for 24h after the reaction is completed, and grind through a 200-mesh sieve to obtain the modified titanium dioxide powder.
5. The method for preparing an aluminum ceiling having a super-hydrophobic surface according to claim 1, It is characterized in that In S2, the method for modifying polyvinylidene fluoride is as follows: 10 g of polyvinylidene fluoride is weighed and dispersed in 200 mL of 50% ethanol aqueous solution, 4 g of sodium hydroxide is added, and the mixture is stirred at a stirring speed of 100 r / min for 12 hours in a water bath at 40°C, and then dried in an oven at 80°C for 24 hours. The modified polyvinylidene fluoride is obtained after grinding through a 200-mesh sieve.
6. The method for preparing an aluminum ceiling having a super-hydrophobic surface according to claim 1, It is characterized in that In S2, the preparation steps of the super hydrophobic coating component are: Step 1, weigh 2g of epoxy resin and dissolve it in 10mL of ethyl acetate, then add 3mL of N-methyl-2-pyrrolidone, 0.6g of perfluoroethylene propylene copolymer, 0.8g of modified titanium dioxide powder and 0.4g of modified polyvinylidene fluoride, mix well and record the result as mixed component; Step 2: After ultrasonically dispersing the mixed components, 0.2 mL of polydimethylsiloxane was added, and after magnetic stirring for 1 hour, 0.3 g of maleic anhydride was added, and the magnetic stirring was continued for 15 minutes to obtain the super-hydrophobic coating component.
7. The method for preparing an aluminum ceiling having a super-hydrophobic surface according to claim 6, It is characterized in that In step 1, the uniform mixing operation is performed by stirring at a stirring speed of 500 r / min for 10 min. In step 2, the ultrasonic dispersion operation is performed by ultrasonic dispersion at a frequency of 28 kHz for 30 min, and the magnetic stirring speed is 300 r / min.
8. The method for preparing an aluminum ceiling having a super-hydrophobic surface according to claim 1, It is characterized in that In S3, the preparation method of the auxiliary coating component is: weigh 0.1g of n-octyltriethoxysilane, 0.1g of tridecafluorooctylsilane and 100g of petroleum ether, mix them, stir them at a stirring speed of 500r / min for 20min in a water bath at 35°C, and the result is the auxiliary coating component.
9. The method for preparing an aluminum ceiling having a super-hydrophobic surface according to claim 1, It is characterized in that The high temperature curing method in S4 is: first place it in an oven at 100°C for curing for 30 minutes, then place it at 210°C for further curing for 90 minutes. The drying method in S4 is to place it in an oven at 120°C for drying for 4 hours.
10. A super hydrophobic aluminum ceiling. It is characterized in that The invention is prepared by the method for preparing an aluminum ceiling having a super-hydrophobic surface as described in any one of claims 1 to 9.