CN116618268A - A kind of super smooth surface and preparation method thereof - Google Patents

Abstract

The invention relates to the technical field of super slippery surfaces, in particular to a super slippery surface and a preparation method thereof. In the present invention, a superhydrophobic coating is formed on the substrate surface to obtain a lipophilic substrate surface; lubricating oil is injected into the lipophilic substrate surface, and the surface is allowed to stand still so that the lubricating oil completely infiltrates the surface, and then the substrate is placed vertically to obtain a super slippery surface. The contact angle of the super slippery surface prepared by the preparation method of the present invention is about 108°, and the sliding angle is about 7°. It has good stability, liquid repellency, corrosion resistance and antifouling property, and can be applied to metal Corrosion protection has broad application prospects in the fields of marine engineering, aerospace, automobile industry, petrochemical industry and architectural furniture.

Description

A kind of super smooth surface and preparation method thereof

technical field

The invention relates to the technical field of super slippery surfaces, in particular to a super slippery surface and a preparation method thereof.

Background technique

The superhydrophobic material designed based on the "lotus leaf effect" can effectively protect the substrate from the interference of the external environment. In the past few decades, this special surface has received widespread attention. The air cushion in the superhydrophobic rough structure, It can prevent droplets from infiltrating the substrate, so the superhydrophobic coating exhibits good protection, self-cleaning, anti-icing and anti-fog properties. The Chinese patent with the publication number CN115537050A discloses a F-SiO ₂ /BPH-8 composite gel. The coating prepared by using the F-SiO ₂ /BPH-8 composite gel has good superhydrophobic properties, and is suitable for many All substrates have good applicability. However, there are still some problems with this material. When the superhydrophobic surface faces high temperature and high pressure, organic solution and liquid with complex components, the chemical composition and "air cushion" structure of the surface are easily damaged, which seriously limits its development and application. Inspired by the leaf structure of Nepenthes, researchers proposed that a superhydrophobic surface (SHS) could be transformed into a superslippery surface (SLIPS) by injecting lubricating fluid. The lubricating fluid with low surface energy is stored between the holes to replace the "air cushion" structure, forming a uniform and smooth lubricating layer on the surface of the coating, which can effectively withstand the interference of the external environment and show excellent stability properties and superhydrophobicity. This new type of material with special wettability has the advantages of anti-organic liquids, low surface energy liquids (crude oil), biological liquids (blood, etc.), ice and biofouling, good stability, and self-repairing. , antifreeze and antifog, metal anticorrosion and other fields have shown good application prospects.

However, there are still great deficiencies in the preparation and service of super-slippery coatings. Since the lubricating oil of the super-slip coating is in a liquid state, it will gradually lose when it is affected by high temperature, ultraviolet rays, and water flow impact in the environment, resulting in the loss of the unique and excellent functions of the super-slip coating. Therefore, designing and preparing a super-slip coating with stable performance and long-lasting durability has very important research significance and commercial value.

Contents of the invention

The object of the present invention is to provide a super-slip surface and a preparation method thereof, so as to solve the above-mentioned problems in the prior art.

In order to achieve the above-mentioned purpose of the invention, the present invention provides the following technical solutions:

The invention provides a method for preparing an ultra-smooth surface, comprising the following steps:

(1) Form a superhydrophobic coating on the surface of the substrate to obtain a substrate surface with lipophilic properties;

(2) inject lubricating oil into the surface of the substrate with lipophilic properties prepared in step (1), let the lubricating oil completely infiltrate the surface, and then place the substrate vertically to obtain a super slippery surface.

Preferably, the substrate in the step (1) includes a glass substrate, a metal substrate or a ceramic substrate; the metal substrate includes brass, aluminum, titanium alloy or magnesium alloy.

Preferably, when the substrate in the step (1) is a glass substrate, the method for forming a superhydrophobic coating on the surface of the glass substrate is: adding the mixture of F-SiO and BPH- ₈ to an organic solvent and heating to 140- 180°C, dissolve and coat on the surface of the glass substrate to obtain a super-hydrophobic coating on the glass surface;

The organic solvent comprises one or more of ethanol and tetrahydrofuran;

The mass ratio of described F-SiO ₂ and BPH-8 is 10～100:100;

The mass ratio of the BPH-8 and the organic solvent is 0.35:100～0.45:100;

The thickness of the superhydrophobic coating on the glass surface is 10-20 μm.

Preferably, when substrate in described step (1) is metal substrate, the preparation method that metal substrate surface forms superhydrophobic coating comprises the steps:

a. Etching the surface of the polished metal substrate to obtain the surface of the etched metal substrate;

b. Add the mixture of F-SiO ₂ and BPH-8 into an organic solvent and heat it to 140-180°C. After the BPH-8 gel factor is completely dissolved, apply it on the surface of the etched metal substrate prepared in step a to obtain Superhydrophobic coating on metal surface;

The mass ratio of the F-SiO ₂ and BPH-8 is 10～100:100;

The mass ratio of the BPH-8 and the organic solvent is 0.35:100～0.45:100;

The organic solvent contains one or more of ethanol and tetrahydrofuran.

Preferably, the laser scanning pitch for surface etching in step a is 30-70 μm, the diameter of the laser beam spot is 15-50 μm, the laser scanning power is 7-15W, the laser frequency is 30-50KHz, and the laser scanning speed is 30～300mm/s;

The thickness of the superhydrophobic coating on the metal surface in the step b is 10-20 μm.

Preferably, the lubricating oil in the step (2) includes perfluoropolyether, hydrocarbon silicone oil or dimethyl silicone oil; the viscosity of the lubricating oil is 20-200 mPa·s.

Preferably, the standing time in the step (2) is 20-60 min; the vertical standing time is 30-90 min.

The present invention also provides a super slippery surface prepared by the above preparation method of the super slippery surface.

The design of the super-slippery surface of the present invention needs to follow the following steps: (1) construct a micro-nano rough structure on the surface of the substrate; (2) utilize low surface energy chemical substances to modify the substrate to give it lipophilic properties; (3) select A suitable lubricating oil is injected into the coated surface, after which a stable lubricating layer is formed. Since the F-SiO ₂ /BPH-8 composite gel coating itself has rough structure and lipophilic properties, the preparation of the super slippery surface in the present invention is based on the preparation of the F-SiO ₂ /BPH-8 composite gel superhydrophobic coating owned.

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

In the present invention, the F-SiO ₂ /BPH-8 composite gel coating has excellent super-hydrophobic properties, and the BPH-8 gel factor and F-SiO ₂ nanoparticles have good lipophilicity, and the self-formed micro-nano rough structure It can form a stable oil storage space. The F-SiO ₂ /BPH-8 composite gel coating is coated on the surface of the substrate as the oil storage substrate, and a suitable lubricant is injected into the superhydrophobic coating to obtain a super slippery surface. The contact angle of the super slippery surface prepared by the preparation method of the present invention is about 108°, and the sliding angle is about 7°. It has good stability, liquid repellency, corrosion resistance and antifouling property, and can be applied to metal Corrosion protection has broad application prospects in the fields of marine engineering, aerospace, automobile industry, petrochemical industry and architectural furniture.

Description of drawings

Fig. 1 is the variation of contact angle of droplets on the surface of silicone oil samples with different viscosities prepared in Examples 1-4 with the viscosity of silicone oil;

Fig. 2 is the change of sliding angle and sliding velocity (inclination angle 10°) of droplets on the surface of silicone oil samples with different viscosities prepared in Examples 1-4 with the viscosity of silicone oil;

Fig. 3 is the variation curve (inclination angle 10°) of the sliding velocity of water droplets on the surface of samples of silicone oils with different viscosities prepared in Examples 1-4 as a function of water scouring time;

Fig. 4 is the comparison of wettability of different external liquids on the superhydrophobic surface made in Comparative Example 1 and the super slippery surface made in Example 3;

Fig. 5 is the dynamic potential polarization diagram of the superhydrophobic sample prepared in Comparative Example 2 and the super slippery sample prepared in Example 5.

Detailed ways

The invention provides a method for preparing an ultra-smooth surface, comprising the following steps:

(1) Form a superhydrophobic coating on the surface of the substrate to obtain a substrate surface with lipophilic properties;

(2) inject lubricating oil into the surface of the substrate with lipophilic properties prepared in step (1), let the lubricating oil completely infiltrate the surface, and then place the substrate vertically to obtain a super slippery surface.

In the present invention, the substrate in the step (1) includes a glass substrate, a metal substrate or a ceramic substrate, preferably a metal substrate or a glass substrate; the metal substrate includes brass, aluminum, titanium alloy or magnesium alloy, preferably brass Copper, aluminum or titanium alloys.

In the present invention, when the substrate in the step (1) is a glass substrate, the method for forming a superhydrophobic coating on the surface of the glass substrate is: F- _SiO2 and BPH-8 The mixture is added in an organic solvent and heated to 140-180°C, preferably 150-160°C, dissolve and coat on the surface of the glass substrate to obtain a super-hydrophobic coating on the glass surface;

The mass ratio of F-SiO ₂ and BPH-8 is 10-100:100, preferably 50-80:100, more preferably 70:100;

The mass ratio of the BPH-8 to the organic solvent is 0.35:100 to 0.45:100, preferably 0.4:100;

The organic solvent comprises one or more of ethanol and tetrahydrofuran, preferably ethanol;

The thickness of the superhydrophobic coating on the glass surface is 10-20 μm, more preferably 15 μm.

In the present invention, when the substrate in the step (1) is a metal substrate, the preparation method for forming a superhydrophobic coating on the surface of the metal substrate comprises the following steps:

a. Etching the surface of the polished metal substrate to obtain the surface of the etched metal substrate;

b. Add the mixture of F-SiO ₂ and BPH-8 into an organic solvent and heat it to 140-180°C, preferably 150-160°C. After the BPH-8 gel factor is completely dissolved, drop-coat the product prepared in step a Etching the surface of the metal substrate to obtain a super-hydrophobic coating on the metal surface;

The mass ratio of F-SiO ₂ and BPH-8 is 10-100:100, preferably 30-80:100, more preferably 70:100;

The mass ratio of the BPH-8 to the organic solvent is 0.35:100 to 0.45:100, preferably 0.4:100;

The organic solvent includes one or more of ethanol and tetrahydrofuran, preferably ethanol.

In the present invention, the metal substrate after polishing in the step a is that the metal substrate is successively polished on the surface of 150#, 500#, 1000#, 1500# sandpaper to remove surface scratches, and then on the metallographic sample grinding and polishing machine Polishing treatment to achieve a mirror effect; the polished sample is ultrasonically cleaned in a mixed solution of absolute ethanol, acetone, and water to remove organic pollutants on the surface, and finally placed in an oven to dry to obtain a polished metal substrate;

The mass ratio of the absolute ethanol, acetone and water is 1～2:1～2:1～2, preferably 1:1:1;

The power of the ultrasonic cleaning is 80-120W, preferably 90-110W; the time is 10-30min, preferably 15-25min;

The laser scanning pitch of the surface etching in the step a is 30-70 μm, preferably 40-60 μm, more preferably 50 μm; the diameter of the laser beam spot is 15-50 μm, preferably 30-40 μm; the laser scanning power is 7 ～15W, preferably 10～13W, more preferably 11W; laser frequency is 30～50KHz, preferably 35～45KHz; laser scanning speed is 30～300mm/s, preferably 80～200mm/s, more preferably 100mm/s s;

After the surface etching in step a, the etched metal substrate is placed in a mixed solution of absolute ethanol, acetone, and water for ultrasonic cleaning to remove surface pollutants, and the etched metal substrate is obtained after drying;

The mass ratio of the absolute ethanol, acetone and water is 1～2:1～2:1～2, preferably 1:1:1;

The power of the ultrasonic cleaning is 80-120W, preferably 90-110W; the time is 10-30min, preferably 15-25min.

In the present invention, the thickness of the superhydrophobic coating on the metal surface in step b is 10-20 μm, preferably 15 μm.

In the present invention, the lubricating oil in the step (2) includes perfluoropolyether, hydrocarbon silicone oil or simethicone oil, preferably simethicone oil; the viscosity of the lubricating oil is 20-200mPa·s, preferably 50 to 150 mPa·s, more preferably 100 mPa·s.

In the present invention, the standing time in the step (2) is 20-60 min, preferably 30-40 min; the vertical standing time is 30-90 min, preferably 40-70 min, more preferably 60 min.

In the present invention, the function of placing the substrate vertically for 30-90 minutes in the step (2) is to discharge excess lubricating oil under the action of gravity.

The present invention also provides the super slippery surface prepared by the above preparation method of the super slippery surface.

The technical solutions provided by the present invention will be described in detail below in conjunction with the examples, but they should not be interpreted as limiting the protection scope of the present invention.

Example 1

(1) Add the mixture of F-SiO ₂ and BPH-8 into an organic solvent, heat to 150°C, and coat the surface of the glass substrate after the BPH-8 gel factor dissolves to obtain a superhydrophobic coating on the glass surface with lipophilic properties. Layer, the mass ratio of F-SiO ₂ and BPH-8 is 70:100, the mass ratio of BPH-8 and organic solvent is 0.4:100, the organic solvent is a mixture of absolute ethanol and THF, the volume of absolute ethanol and THF The ratio is 5:5.

(2) Inject simethicone oil with a viscosity of 20mPa·s into the superhydrophobic coating on the glass surface with lipophilic properties prepared in step (1), let it stand for 30 minutes to completely infiltrate the surface with simethicone oil, and then place the substrate vertically Leave it for 60 minutes, and discharge excess lubricating oil under the action of gravity to obtain a super slippery surface.

Example 2

The difference from Example 1 is only that the viscosity of the simethicone oil is 50 mPa·s.

Example 3

The only difference from Example 1 is that the viscosity of the simethicone oil is 100 mPa·s.

Example 4

The difference from Example 1 is only that the viscosity of the simethicone oil is 200 mPa·s.

Example 5

(1) Grind the purchased H59 brass metal sample (20mm*20mm thickness 1mm) on the surface of 150#, 500#, 1000#, 1500# sandpaper to remove surface scratches, and then polish it on a metallographic sample polishing machine The treatment achieves a mirror effect. The polished samples were ultrasonically cleaned in a mixed solution of absolute ethanol, acetone, and deionized water. The ultrasonic power was 100W for 20 minutes to remove organic pollutants on the surface, and finally dried in an oven to obtain polished samples. brass metal samples.

(2) Place the polished brass sample on the sample stage, the scanning distance of the laser surface treatment instrument used is 50μm, the scanning power is 11W, the scanning speed is 100mm/s, the diameter of the laser beam spot is 50μm, and the laser frequency is 30KHz . Place the etched metal substrate in a mixed solution of absolute ethanol, acetone, and deionized water for ultrasonic cleaning for 10 minutes with a power of 100W to remove surface pollutants, and then dry it with a hair dryer to obtain an etched brass metal substrate.

(3) Add the mixture of F-SiO ₂ and BPH-8 into the mixed solvent of absolute ethanol and tetrahydrofuran, heat to 150°C, and coat the surface of the brass metal substrate after the BPH-8 gel factor dissolves to obtain an Oily super-hydrophobic coating on glass surface, the mass ratio of F-SiO ₂ and BPH-8 is 70:100, the mass ratio of BPH-8 and organic solvent is 0.4:100, and the organic solvent is a mixture of absolute ethanol and tetrahydrofuran , the volume ratio of absolute ethanol and tetrahydrofuran is 5:5.

(4) Inject simethicone oil into the superhydrophobic coating on the surface of brass metal substrate with lipophilic properties, let it stand for 30 minutes to completely infiltrate the surface with simethicone oil, then place the substrate vertically for 60 minutes, and discharge it under the action of gravity Excess simethicone for an ultra slippery finish.

Comparative example 1

The F-SiO ₂ /BPH-8 composite gel with a mass ratio of F-SiO ₂ and BPH-8 of 70:100 was heated to 150°C, dissolved and coated on the surface of a glass substrate to obtain a superhydrophobic coating on the glass surface.

Comparative example 2

(1) Grind the purchased H59 brass metal sample (20mm*20mm thickness 1mm) on the surface of 150#, 500#, 1000#, 1500# sandpaper to remove surface scratches, and then polish it on a metallographic sample polishing machine The treatment achieves a mirror effect. The polished samples were ultrasonically cleaned in a mixed solution of absolute ethanol, acetone, and deionized water. The ultrasonic power was 100W for 20 minutes to remove organic pollutants on the surface, and finally dried in an oven to obtain polished samples. brass metal samples.

(2) Place the polished brass sample on the sample stage, the scanning distance of the laser surface treatment instrument used is 50μm, the scanning power is 11W, the scanning speed is 100mm/s, the diameter of the laser beam spot is 50μm, and the laser frequency is 30KHz . Place the etched metal substrate in a mixed solution of absolute ethanol, acetone, and deionized water for ultrasonic cleaning for 10 minutes with a power of 100W to remove surface pollutants, and then dry it with a hair dryer to obtain an etched brass metal substrate.

(3) Add the mixture of F-SiO ₂ and BPH-8 into the mixed solvent of absolute ethanol and tetrahydrofuran, heat to 150°C, and coat the surface of the brass metal substrate after the BPH-8 gel factor dissolves to obtain an Oily super-hydrophobic coating on glass surface, the mass ratio of F-SiO ₂ and BPH-8 is 70:100, the mass ratio of BPH-8 and organic solvent is 0.4:100, and the organic solvent is a mixture of absolute ethanol and tetrahydrofuran , the volume ratio of absolute ethanol and tetrahydrofuran is 5:5.

test case 1

The present invention tests the wettability of the super slippery surface prepared in Examples 1-4, and the test results are shown in Fig. 1 and Fig. 2 .

It can be seen from Fig. 1 that the contact angles on the surfaces of the samples prepared from simethicone oils with different viscosities prepared in Examples 1-4 are all about 108°. This is because after the lubricating oil is injected into the super-hydrophobic surface, a flat oil film will be formed on the surface, replacing the rough structure and the role of "air cushion". Therefore, the size of the sample surface contact angle is only related to the chemical properties of the lubricating oil. The droplet is dropped on the surface of the sample and directly contacts with the simethicone oil. The chemical composition of the simethicone oil with different viscosities is the same, showing similar liquid repellency. However, the viscosity of simethicone oil will affect the sliding properties of surface droplets, mainly in two aspects: sliding angle and sliding velocity.

As shown in Figure 2, when the viscosity of simethicone oil is 20mPa·s and 50mPa·s, the sliding angle SA≈5° on the surface of the sample, and when the viscosity of simethicone oil increases to 100mPa·s and 200mPa·s, the sliding angle The angle SA rises above 7°. At the same time, when the sample was placed at an inclination angle of 10°, the sliding velocity of the droplet on the surface of the sample with a lower viscosity (20 mPa s) was 1.76 mm/s, while that of the sample with a higher viscosity (200 mPa s) decreased to 0.37mm/s. This shows that with the increase of the viscosity of simethicone oil, it is more difficult for the droplet to slide on the surface of the sample. The reason is that the lower the viscosity of the simethicone oil, the better the fluidity, and the less resistance the droplet receives when it slides on the surface. However, high-viscosity simethicone oil has poor fluidity and will generate greater adhesion resistance to droplets on the surface. Therefore, droplets on the surface of low-viscosity simethicone oil samples are more likely to slide.

test case 2

From the results of Test Example 1, it can be seen that simethicone oil with lower viscosity has strong fluidity and is more conducive to the sliding of droplets on the surface. However, the surface stability of ultra-slippery samples needs to be considered in practical use. Therefore, in order to test the influence of the viscosity of simethicone oil on the stability of the super slippery surface, the present invention tested the stability of the super slippery surface prepared in Examples 1-4 through water scouring experiments, and the test results are shown in Figure 3 .

As shown in Figure 3, after the simethicone oil samples with lower viscosity (20mPa s, 50mPa s) prepared in Example 1 and Example 2 were washed for a period of time in the water flow of 100rpm, the sliding speed of the droplet on the surface Changes are relatively large, and after the high-viscosity simethicone oil samples (100mPa·s, 200mPa·s) prepared in Examples 3 and 4 were washed in water for 5 days, the sliding velocity of the surface droplets remained almost unchanged. This is because low-viscosity simethicone oil is more likely to flow, and most of the simethicone oil is taken away by the water flow under the water flow, and the content of simethicone oil on the surface of the sample is greatly reduced, resulting in the droplet slipping on the surface. Increased adhesion force. In comparison, simethicone with a higher viscosity is not easy to flow, and the loss is less under long-term water washing. This result corresponds to the test result of the sliding angle of the sample surface in Fig. 2.

According to the design requirements of the ultra-slippery surface, the lubricant and water droplets are mutually immiscible. However, due to the energy difference between the lubricant/air interface and the water/air interface, the lubricant with low surface energy will be wrapped on the surface of the water droplet (clock phenomenon), and a large amount of loss will occur as the water droplet slides down, gradually destroying the hydrophobicity of the super slippery surface. liquid. Therefore, considering the stability and wettability of the super slippery surface, the properties of the super slippery sample prepared by 100mPa·s simethicone oil are the best.

Test case 3

In daily use, most materials need to face complex external environments. In order to verify whether the super slippery surface prepared by the present invention has more excellent liquid repellency and antifouling properties, the present invention selected 4 typical solutions (acid solution, alkali solution, dehydrated alcohol, detergent aqueous solution) are added dropwise on the ultra-slippery surface prepared in embodiment 3 and the super-hydrophobic coating on the glass surface prepared in comparative example 1 to observe their wetting state, and the test results are as shown in the figure 4.

It can be seen from Fig. 4 that the super-slippery surface prepared in Example 3 shows good lyophobicity to the four liquids, and the droplet can slide on the surface of the sample. As a comparison, the superhydrophobic coating on the glass surface prepared in Comparative Example 1 only exhibits lyophobic properties when facing an acidic solution with pH=2 and an alkaline solution with pH=12, and the droplets can be dropped on the surface of the sample. Roll down quickly. However, it showed strong adsorption to the other two liquids (absolute ethanol and aqueous solution of detergent).

This is because the basic mechanisms of the superslip and superhydrophobic samples are different, and thus the two materials have different lyophobic properties. The "lubricating layer" structure on the surface of the ultra-slippery sample has stable chemical inertness, and can maintain good lyophobicity in the face of liquids of various components. However, the "air cushion" structure of superhydrophobic samples is easily affected by external factors. When faced with absolute ethanol, the substrate exhibited a fully wetted state due to the droplet's low surface energy and strong chemical affinity with the BPH-8 organogelator. The detergent aqueous solution contains surfactants, which can reduce the surface tension of water at the air-liquid interface on the sample surface, resulting in the failure of the "air cushion" structure, and eventually adhere to the substrate surface, so its lyophobic properties have certain limitations.

Therefore, converting the superhydrophobic surface into a superslip surface by injecting lubricating oil can effectively improve the liquid repellency and antifouling ability of the sample.

Test case 4

In order to compare the corrosion resistance of the super-slippery surface prepared in Example 5 and the superhydrophobic coating on the brass metal surface prepared in Comparative Example 2, the present invention utilizes an electrochemical workstation to compare the polished brass metal substrate in Comparative Example 2 , the superhydrophobic coating on the surface of the brass metal substrate and the super-slippery surface prepared in Example 5 were electrochemically tested, and Figure 5 and Table 1 show the test results.

Table 1 Fitting results of potentiodynamic polarization curves of different samples

As shown in Figure 5 and Table 1, compared with the superhydrophobic sample, the corrosion potential of the super-slippery sample increased from -238.7mV to -218.6mV, and the corrosion current density decreased from 8.38*10 ^-7 A/cm ² to 6.02*10 ^-9 A/cm ² , another two orders of magnitude lower, showing an extremely low corrosion rate.

Calculate the change of corrosion resistance efficiency of samples before and after modification according to the formula of corrosion resistance efficiency

η is the corrosion resistance efficiency of the sample, is the corrosion current density of the original polished substrate, and _Icorr is the super-slippery sample after modification. According to the data calculation, it can be known that the corrosion resistance efficiency of the super-smooth surface reaches 99.98%.

There are great differences in properties and structures between superhydrophobic samples and superslip samples, which leads to different corrosion resistance mechanisms of the two: the superhydrophobic surface can reduce the friction between the external liquid and the sample surface by virtue of its own "air cushion" structure. Contact, thereby improving the corrosion resistance of the substrate; and in the super slippery sample of the present invention, simethicone oil replaces the "air cushion" structure, the contact angle of the sample surface changes from 170° to 108°, and the contact area between the external liquid and the surface becomes larger , but the lubricating oil has strong stability and non-conductivity, and the ^Cl- and free electrons in the corrosive liquid are completely isolated. Therefore, the super-slip samples exhibited more excellent corrosion resistance properties.

It can be seen from the above examples that the present invention provides a super-slip surface and a preparation method thereof. The contact angles of the super slippery surfaces prepared by the preparation method of the present invention are all about 108°, have good stability, liquid repellency, corrosion resistance and antifouling properties, and can be applied to the protection of metal corrosion. , aerospace, automotive industry, petrochemical and architectural furniture and other fields have broad application prospects.

The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (8)

1. a preparation method of super slippery surface, is characterized in that, comprises the following steps: (1) Form a superhydrophobic coating on the surface of the substrate to obtain a substrate surface with lipophilic properties; (2) inject lubricating oil into the surface of the substrate with lipophilic properties prepared in step (1), let the lubricating oil completely infiltrate the surface, and then place the substrate vertically to obtain a super slippery surface. 2. the preparation method of a kind of ultra-slip surface according to claim 1, is characterized in that, in described step (1), base comprises glass base, metal base or ceramic base; Described metal base comprises brass, aluminum, Titanium alloy or magnesium alloy. 3. the preparation method of a kind of super-slip surface according to claim 2, is characterized in that, when substrate is glass substrate in described step (1), the method for forming superhydrophobic coating on glass substrate surface is: F -The mixture of SiO ₂ and BPH-8 is added into an organic solvent and heated to 140-180°C, dissolved and coated on the surface of the glass substrate to obtain a super-hydrophobic coating on the glass surface; The organic solvent comprises one or more of ethanol and tetrahydrofuran; The mass ratio of described F-SiO ₂ and BPH-8 is 10～100:100; The mass ratio of the BPH-8 and the organic solvent is 0.35:100～0.45:100; The thickness of the super-hydrophobic coating on the glass surface is 10-20 μm. 4. the preparation method of a kind of super slippery surface according to claim 2, is characterized in that, when substrate is metal substrate in described step (1), the preparation method that metal substrate surface forms superhydrophobic coating comprises the steps: a. Etching the surface of the polished metal substrate to obtain the surface of the etched metal substrate; b. Add the mixture of F-SiO ₂ and BPH-8 into an organic solvent and heat it to 140-180°C. After the BPH-8 gel factor is completely dissolved, apply it on the surface of the etched metal substrate prepared in step a to obtain Superhydrophobic coating on metal surface; The mass ratio of the F-SiO ₂ and BPH-8 is 10～100:100; The mass ratio of the BPH-8 and the organic solvent is 0.35:100～0.45:100; The organic solvent contains one or more of ethanol and tetrahydrofuran. 5. The preparation method of a kind of super-slippery surface according to claim 4, characterized in that, the laser scanning pitch of the surface etching in the step a is 30-70 μm, and the diameter of the laser beam spot is 15-50 μm, The laser scanning power is 7~15W, the laser frequency is 30~50KHz, and the laser scanning speed is 30~300mm/s; The thickness of the superhydrophobic coating on the metal surface in the step b is 10-20 μm. 6. according to the preparation method of a kind of super slippery surface described in any one of claim 1～5, it is characterized in that, in described step (2), lubricating oil comprises perfluoropolyether, hydrocarbon silicone oil or dimethyl silicone oil ; The viscosity of the lubricating oil is 20-200mPa·s. 7 . The method for preparing a super-slippery surface according to claim 6 , wherein the standing time in the step (2) is 20-60 min; the vertical standing time is 30-90 min. 8 . 8. The super slippery surface prepared by the method for preparing the super slippery surface according to any one of claims 1 to 7.