Super-wear-resistant super-hydrophobic column and preparation method thereof

Abstract

The invention discloses a super-wear-resistant super-hydrophobic column and a preparation method thereof. The wear-resistant super hydrophobic column body comprises a polymer and super hydrophobic nanoparticles located in the polymer, according to the super-hydrophobic column body structure, the property that the interior and the exterior are homogeneous is obtained by means of a stamping process, the wear resistance of a three-dimensional column body is enhanced, and the super-hydrophobicity and the anti-icing performance are further improved. The super-wear-resistant super-hydrophobic column body disclosed by the invention has the characteristics of limiting surface icing and delaying the icing process, and meanwhile, has excellent wear resistance and lower ice adhesion strength in circulating icing / deicing.

Description

Technical Field

[0001] The present invention belongs to the technical field of superhydrophobic materials, and particularly relates to a superwear-resistant superhydrophobic columnar body and a preparation method thereof. Background Art

[0002] Superhydrophobic materials have shown important application potential in fields such as power equipment, aerospace, and transportation facilities due to their unique anti-icing properties (such as delaying ice formation and reducing ice adhesion). In the prior art, anti-icing superhydrophobic materials are mostly realized in the form of surface coatings. For example, micro-nano rough structures are constructed on the surface of a substrate through chemical etching or nanoparticle modification, and are supplemented with modification by low surface energy substances. However, such coatings have significant limitations: First, the surface superhydrophobic coating is prone to structural failure under mechanical wear (such as sand and ice particle impact) or extreme environments (such as salt spray and ultraviolet rays), resulting in a sharp decline in anti-icing performance; Second, the interfacial bonding force between the coating and the substrate is weak, and it is prone to peeling during the long-term cyclic ice formation-deicing process, unable to meet the requirements of long-term outdoor service; Third, traditional coatings are difficult to achieve three-dimensional design in the thickness direction, and the material lacks uniform superhydrophobic characteristics inside. Once the surface is worn, the overall function is lost.

[0003] Compared with the manufacturing processes of superhydrophobic thin films and coatings, the three-dimensional synthesis of superhydrophobic columnar bodies with a considerable thickness / height has better prospects and value, but is more difficult in the forming manufacturing process. Superhydrophobic columnar bodies show more excellent adaptability under extreme environmental conditions, with excellent corrosion resistance and anti-mechanical impact ability. In addition, even if the surface of the columnar body is slightly mechanically damaged, self-repair can be achieved through the characteristics of the same quality inside and outside, thus broadening its application range. Although existing superhydrophobic blocks / columnar bodies have problems such as low structural strength, non-uniform surface energy, complex preparation processes, poor environmental protection, and difficulty in recycling, the above work has initially demonstrated the great potential of three-dimensional superhydrophobic columnar bodies. Summary of the Invention

[0004] The purpose of the present invention is to provide a superwear-resistant superhydrophobic columnar body and a preparation method thereof.

[0005] A superwear-resistant superhydrophobic columnar body, wherein the superhydrophobic columnar body is composed of a polymer and superhydrophobic nanoparticles inside the polymer; the mass ratio of the polymer to the superhydrophobic nanoparticles inside the polymer is 100:(6 - 18); the polymer is room temperature vulcanized silicone rubber (RTV), fluorosilicone resin or epoxy resin.

[0006] The preparation raw materials of the superhydrophobic nanoparticles include a modification liquid and a particle dispersion liquid, and the mass ratio of the modification liquid to the dispersion liquid is 1:(50 - 70).

[0007] The modified liquid is prepared from a low surface energy modifier and anhydrous ethanol, wherein the mass ratio of the surfactant to the anhydrous ethanol is 1:(5-10); the low surface energy modifier is perfluorooctyltriethoxysilane (PFDTMS) or n-octyltriethoxysilane (OTS).

[0008] The particle dispersion is prepared from nanoparticles and anhydrous ethanol, wherein the mass ratio of the nanoparticles to the anhydrous ethanol is 1:(20-30); the nanoparticles are one or more of silicon dioxide particles, aluminum oxide particles, and zinc oxide particles; and the particle size of the nanoparticles is 10nm-40nm.

[0009] A method for preparing a super-wear-resistant super-hydrophobic column comprises the following steps:

[0010] (1) dissolving a low surface energy modifier in anhydrous ethanol to prepare a modified solution; at the same time, dispersing nanoparticles in anhydrous ethanol, and then performing ultrasonic oscillation to fully disperse the nanoparticles in the ethanol to obtain a particle dispersion solution;

[0011] (2) adding the modified liquid to the particle dispersion and continuously stirring on a heating table; repeatedly washing with ethanol and placing in a freeze drying oven, and after drying, obtaining super hydrophobic nanoparticles;

[0012] (3) fully mixing the super-hydrophobic nanoparticles and the polymer, and stirring on a stirring table to make the nanoparticles uniformly dispersed in the polymer to form micelles;

[0013] (4) loading the micro-micelles prepared in step (3) into a polytetrafluoroethylene forming mold, compacting the material using a stamping platform, and then placing the block in an oven for continuous curing;

[0014] (5) The formed blank is taken out from the polytetrafluoroethylene mold on a bench platform with the aid of a demoulding fixture, and is fully cleaned with anhydrous ethanol and naturally dried to obtain a superhydrophobic column.

[0015] In step (1), a low surface energy modifier and anhydrous ethanol are mixed, and stirred at a speed of 500 to 1000 r / min for 5 to 15 minutes to obtain a modified liquid; nanoparticles and anhydrous ethanol are mixed, and ultrasonic oscillation is performed for 20 to 40 minutes to obtain a particle dispersion.

[0016] In step (2), the modified liquid is added to the particle dispersion and stirred at a speed of 500 to 1000 r / min for 10 to 30 hours on a heating table at 50 to 70°C.

[0017] In step (3), the stirring conditions are: first stirring at 400-600 r / min for 2-5 min, then increasing the speed to 1800-2400 r / min and stirring for 3-6 min.

[0018] The parameters of the stamping are 0.4 - 0.6 MPa, 1 - 2 Hz, and 3 min; after stamping, the blank is placed in an oven at 50 - 60 °C and cured for 96 h.

[0019] In step (5), the pre - forming mold and the demolding fixture are soaked in a 1 - 5% SW - 1 n - hexane solution and dried; the forming mold is a cylindrical shell with a wall thickness of 2 mm, an inner diameter of 30 mm, and a height of 30 mm.

[0020] Advantages of the present invention: The super - wear - resistant and super - hydrophobic columnar body of the present invention is prepared from a polymer and super - hydrophobic nanoparticles in the polymer. Adding super - hydrophobic nanoparticles to the polymer enables the super - hydrophobic nanoparticles to be largely distributed and uniformly dispersed in the system, which provides a stable rough geometric structure and chemical properties of low surface energy, making the stamping columnar body have the property of super - hydrophobic surface. At the same time, the introduction of super - hydrophobic nanoparticles reduces the interfacial gaps inside the polymer, which can reduce the loss of the columnar body during the wear process. Due to the homogeneous property of the inside and outside of the stamping forming, the super - hydrophobic columnar body has excellent liquid - repellent properties both inside and outside, significantly improving the durability of the super - hydrophobic columnar body and extending the service life of the coating. The super - hydrophobic nanoparticles provide the super - hydrophobic columnar body with extremely low surface energy and hydrophobicity, which further enhances the anti - icing performance of the columnar body. At the same time, the added super - hydrophobic nanoparticles can greatly delay the ice - formation time of water droplets on the coating surface, making the super - hydrophobic columnar body have a longer ice - formation time. The super - hydrophobic columnar body can achieve a sustainable utilization process of self - regeneration cycle. By grinding the scrapped super - hydrophobic columnar body into particles for reuse, an environmentally friendly and efficient recycling scheme is developed, which is of great significance for the future problem of a large number of super - hydrophobic materials being retired or failing. The preparation method of the wear - resistant and super - hydrophobic columnar body of the present invention has a controllable process, and the prepared product has stable quality, and is suitable for large - scale industrial production. The super - hydrophobic columnar body obtained by stamping forming has excellent wear - resistant performance, and at the same time has the characteristics of restricting surface ice - formation and delaying the ice - formation process, and has an extremely low ice adhesion strength in the cyclic freezing / de - icing. Description of the Drawings

[0021] Figure 1 It is a scanning electron microscope photograph of the surface of the super - hydrophobic columnar body prepared in Example 1.

[0022] Figure 2 It is a columnar diagram of the surface wettability test of different super - hydrophobic columnar bodies in Examples 1 - 5 and Comparative Examples 1 - 3.

[0023] Figure 3 It is the change relationship of the surface wettability of the super - hydrophobic columnar bodies prepared in Examples 1 - 5 and Comparative Examples 1 - 3 after the wear cycle test.

[0024] Figure 4The variation relationship of the ice adhesion strength of the superhydrophobic columnar bodies prepared in Examples 1-5 and Comparative Examples 1-3 during cyclic freezing / defrosting. Detailed implementation manners

[0025] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0026] Example 1

[0027] A preparation method of a super wear-resistant superhydrophobic columnar body, comprising the following steps:

[0028] (1) Ultrasonically disperse 5.2 g of silica nanoparticles in 300 ml of absolute ethanol for 30 min to prepare a nano-component particle dispersion liquid, and at the same time dissolve 18 mL of PFDTMS in 300 mL of absolute ethanol to prepare a fluorocarbon compound modification liquid.

[0029] (2) Add 5 mL of the fluorocarbon modification liquid to the above nano-component particle dispersion liquid and continuously stir on a heating platform at 60 °C for 20 hours to achieve surface chemical modification of the nanoparticles by PFDTMS long-chain fluorocarbon molecules; after repeated washing with absolute ethanol, place it in a freeze-drying oven, set the cold trap temperature to -40 °C, the vacuum degree to 100 Pa, and after 12 hours of drying, obtain superhydrophobic nanoparticles.

[0030] (3) Mix 4.68 g of the nano-component and 21.32 g of RTV polymer, first stir at 500 rad / min for 3 minutes and then increase the rotation speed to 2000 rad / min, and continuously stir for 4 minutes.

[0031] (4) Load these micelles into a polytetrafluoroethylene forming mold, and use a stamping platform to compact the material. The stamping parameters are 0.5 MPa, 2 Hz, and 3 minutes; then place the blank in an oven at 60 °C and cure for 96 hours continuously.

[0032] (5) Use a demolding fixture to take out the formed blank from the polytetrafluoroethylene mold on a fitter's platform. The pre-forming mold and the demolding fixture are soaked and dried with a 3% SW-1 hexane solution; the forming mold is a cylindrical shell with a wall thickness of 2 mm, an inner diameter of 30 mm, and a height of 30 mm; after thorough cleaning with absolute ethanol and natural drying, obtain a superhydrophobic columnar body.

[0033] The scanning electron microscope photograph of the surface of the obtained superhydrophobic columnar body is as Figure 1 shown.

[0034] Example 2

[0035] A preparation method of a super wear-resistant and super-hydrophobic columnar body, comprising the following steps:

[0036] (1) Ultrasonically disperse 5.2 g of zinc oxide nanoparticles in 300 ml of absolute ethanol for 30 min to prepare a nanoparticle dispersion liquid, and simultaneously dissolve 20 mL of OTS in 300 mL of absolute ethanol to prepare a modification liquid.

[0037] (2) Add 5 mL of the modification liquid to the above nanoparticle dispersion liquid and continuously stir on a heating table at 60 °C for 20 hours to achieve surface chemical modification of the nanoparticles by OTS long-chain molecules; after repeatedly washing with absolute ethanol, place it in a freeze-drying oven, set the cold trap temperature to -40 °C, the vacuum degree to 100 Pa, and after drying for 12 hours, obtain super-hydrophobic nanoparticles.

[0038] (3) Mix 5.50 of the nano-component and 21.32 g of RTV polymer, first stir at 500 rad / min for 5 minutes and then increase the rotation speed to 2500 rad / min and continuously stir for 6 minutes.

[0039] (4) Load these micelles into a polytetrafluoroethylene forming mold, and use a stamping platform to compact the material. The stamping parameters are 1 MPa, 2 Hz, and 3 minutes; then place the blank in an oven at 60 °C and cure for 96 hours continuously.

[0040] (5) Use a demolding fixture to take out the formed blank from the polytetrafluoroethylene mold on a fitter's platform. Before preparation, the forming mold and the demolding fixture are soaked in a 3% SW-1 hexane solution and dried; the forming mold is a cylindrical shell with a wall thickness of 2 mm, an inner diameter of 30 mm, and a height of 30 mm. After thoroughly cleaning with absolute ethanol and air-drying naturally, a super-hydrophobic columnar body is obtained.

[0041] Example 3

[0042] A preparation method of a super wear-resistant and super-hydrophobic columnar body, comprising the following steps:

[0043] (1) Ultrasonically disperse 7 g of alumina nanoparticles in 300 ml of absolute ethanol for 30 min to prepare a nanoparticle dispersion liquid, and simultaneously dissolve 25 mL of PFDTMS in 300 mL of absolute ethanol to prepare a fluorocarbon compound modification liquid.

[0044] (2) Add 5 mL of the fluorocarbon modification liquid to the above nanoparticle dispersion liquid and continuously stir on a heating table at 60 °C for 20 hours to achieve surface chemical modification of the nanoparticles by PFDTMS long-chain fluorocarbon molecules; after repeatedly washing with absolute ethanol, place it in a freeze-drying oven, set the cold trap temperature to -40 °C, the vacuum degree to 100 Pa, and after drying for 12 hours, obtain super-hydrophobic nanoparticles.

[0045] (3) Mix 2.88 of the nano-component with 18.56 g of the RTV polymer. First, stir at 500 rad / min for 3 minutes and then increase the rotation speed to 2000 rad / min and continue stirring for 8 minutes.

[0046] (4) Load these micelles into a polytetrafluoroethylene forming mold and compact the material using a stamping platform with stamping parameters of 0.5 MPa, 2 Hz, and 3 minutes; then place the billet in an oven at 60 °C and cure for 96 hours.

[0047] (5) Use a demolding fixture to take out the formed blank from the polytetrafluoroethylene mold on a fitter's platform. The pre-forming mold and the demolding fixture are soaked and dried using a 3% SW-1 hexane solution; the forming mold is a cylindrical shell with a wall thickness of 2 mm, an inner diameter of 30 mm, and a height of 30 mm. After thoroughly cleaning with absolute ethanol and air-drying naturally, a superhydrophobic columnar body is obtained.

[0048] Example 4

[0049] A preparation method of a super wear-resistant superhydrophobic columnar body, comprising the following steps:

[0050] (1) Ultrasonically disperse 5.2 g of silica nanoparticles in 300 ml of absolute ethanol for 30 min to prepare a nano-component particle dispersion liquid, and at the same time dissolve 30 mL of OTS in 300 mL of absolute ethanol to prepare a compound modification liquid.

[0051] (2) Add 5 mL of the modification liquid to the above nano-component particle dispersion liquid and continuously stir on a heating platform at 60 °C for 20 hours to achieve surface chemical modification of the nanoparticles by OTS long-chain molecules; after repeatedly washing with absolute ethanol, place it in a freeze-drying oven, set the cold trap temperature to -40 °C, the vacuum degree to 100 Pa, and after 12 hours of drying, obtain superhydrophobic nanoparticles.

[0052] (3) Mix 7.68 g of the nano-component with 21.32 g of the RTV polymer. First, stir at 500 rad / min for 3 minutes and then increase the rotation speed to 2000 rad / min and continue stirring for 4 minutes.

[0053] (4) Load these micelles into a polytetrafluoroethylene forming mold and compact the material using a stamping platform with stamping parameters of 0.5 MPa, 2 Hz, and 3 minutes; then place the billet in an oven at 60 °C and cure for 96 hours.

[0054] (5) Use a demolding fixture to take out the formed blank from the polytetrafluoroethylene mold on a fitter's platform. The pre-forming mold and the demolding fixture are soaked and dried using a 3% SW-1 hexane solution; after thoroughly cleaning with absolute ethanol and air-drying naturally, a superhydrophobic columnar body is obtained.

[0055] Example 5

[0056] A preparation method of a super wear-resistant and super-hydrophobic columnar body, comprising the following steps:

[0057] (1) Ultrasonically disperse 5.2 g of silica nanoparticles in 300 ml of absolute ethanol for 30 min to prepare a nanoparticle dispersion liquid, and simultaneously dissolve 18 mL of PFDTMS in 300 mL of absolute ethanol to prepare a fluorocarbon-modified liquid.

[0058] (2) Add 5 mL of the fluorocarbon-modified liquid to the above nanoparticle dispersion liquid and continuously stir on a heating table at 60 °C for 20 hours to achieve surface chemical modification of the nanoparticles by PFDTMS long-chain fluorocarbon molecules; after repeated washing with absolute ethanol, place it in a freeze-drying oven, set the cold trap temperature to -40 °C, the vacuum degree to 100 Pa, and after drying for 12 hours, obtain super-hydrophobic nanoparticles.

[0059] (3) Mix 4.68 g of the nano-component and 15.32 g of epoxy resin, first stir at 500 rad / min for 2 minutes and then increase the rotation speed to 3000 rad / min and continuously stir for 3 minutes.

[0060] (4) Load these micelles into a polytetrafluoroethylene forming mold, and use a stamping platform to compact the material. The stamping parameters are 0.5 MPa, 1 Hz, and 3 minutes; then place the billet in an oven at 80 °C and cure for 96 hours.

[0061] (5) Use a demolding fixture to take out the formed blank from the polytetrafluoroethylene mold on a fitter's platform. The pre-forming mold and the demolding fixture are soaked and dried with a 3% SW-1 hexane solution; the forming mold is a cylindrical shell with a wall thickness of 2 mm, an inner diameter of 30 mm, and a height of 30 mm. After thorough cleaning with absolute ethanol and natural drying, a super-hydrophobic columnar body is obtained.

[0062] Comparative Example 1

[0063] A preparation method of a super wear-resistant and super-hydrophobic columnar body, comprising the following steps:

[0064] (1) Ultrasonically disperse 5.2 g of silica nanoparticles in 300 ml of absolute ethanol for 30 min, and simultaneously dissolve 10 mL of PFDTMS in the above solution and continuously stir on a heating table at 60 °C for 20 hours. After drying for 12 hours, obtain super-hydrophobic nanoparticles.

[0065] (2) Mix 4.68 g of the nano-component and 15.32 g of RTV polymer, first stir at 500 rad / min for 2 minutes and then increase the rotation speed to 3000 rad / min and continuously stir for 3 minutes.

[0066] (3) Load these micelles into a polytetrafluoroethylene forming mold, and use a stamping platform to compact the material. The stamping parameters are 0.5 MPa, 1 Hz, and 3 minutes. Then place the billet in an oven at 80 °C and cure for 96 hours.

[0067] (4) Use a demolding fixture to take out the formed blank from the polytetrafluoroethylene mold on a fitter's bench. The pre-forming mold and the demolding fixture are soaked and dried with a 3% SW-1 hexane solution. The forming mold is a cylindrical shell with a wall thickness of 2 mm, an inner diameter of 30 mm, and a height of 30 mm. After thorough cleaning with absolute ethanol and natural drying, a superhydrophobic columnar body is obtained.

[0068] Comparative Example 2

[0069] A preparation method of a super wear-resistant superhydrophobic columnar body, comprising the following steps:

[0070] (1) Ultrasonically disperse 5.2 g of silica nanoparticles in 300 ml of absolute ethanol for 30 min to prepare a nano-component particle dispersion liquid. At the same time, dissolve 18 mL of PFDTMS in 300 mL of absolute ethanol to prepare a fluorocarbon compound modification liquid.

[0071] (2) Add 5 mL of the fluorocarbon modification liquid to the above nano-component particle dispersion liquid and continuously stir on a heating table at 60 °C for 20 hours to achieve surface chemical modification of the nanoparticles by PFDTMS long-chain fluorocarbon molecules. After repeated washing with absolute ethanol, place it in a freeze-drying oven. Set the cold trap temperature to -40 °C and the vacuum degree to 100 Pa. After drying for 12 hours, superhydrophobic nanoparticles are obtained.

[0072] (3) Mix 4.68 g of the nano-component and 21.32 g of fluorocarbon resin. First, stir at 500 rad / min for 3 minutes, then increase the rotation speed to 2000 rad / min and continuously stir for 4 minutes.

[0073] (4) Load these micelles into a polytetrafluoroethylene forming mold, and use a stamping platform to compact the material. The stamping parameters are 0.5 MPa, 2 Hz, and 3 minutes. Then place the billet in an oven at 60 °C and cure for 96 hours.

[0074] (5) Use a demolding fixture to take out the formed blank from the polytetrafluoroethylene mold on a fitter's bench. The pre-forming mold and the demolding fixture are soaked and dried with a 3% SW-1 hexane solution. The forming mold is a cylindrical shell with a wall thickness of 2 mm, an inner diameter of 30 mm, and a height of 30 mm. After thorough cleaning with absolute ethanol and natural drying, a columnar body is obtained.

[0075] Comparative Example 3

[0076] A preparation method of a super wear-resistant and superhydrophobic columnar body, comprising the following steps:

[0077] (1) Ultrasonically disperse 5.2 g of silica nanoparticles in 300 ml of absolute ethanol for 30 min to prepare a nano-component particle dispersion liquid, and at the same time dissolve 18 mL of PFDTMS in 300 mL of absolute ethanol to prepare a fluorocarbon compound modification liquid.

[0078] (2) Add 10 mL of the fluorocarbon modification liquid to the above nano-component particle dispersion liquid and continuously stir on a heating platform at 60 °C for 20 hours. After drying at 80 °C for 12 hours, superhydrophobic nanoparticles are obtained.

[0079] (3) Mix 2.18 g of the nano-component and 21.32 g of fluorocarbon resin. First, stir at 500 rad / min for 3 minutes and then increase the rotation speed to 2000 rad / min and continuously stir for 4 minutes.

[0080] (4) Load these micelles into a polytetrafluoroethylene molding die, and use a stamping platform to compact the material. The stamping parameters are 0.5 MPa, 2 Hz, and 3 minutes; then place the billet in an oven at 60 °C and cure for 96 hours continuously.

[0081] (5) Use a demolding fixture to take out the formed blank from the polytetrafluoroethylene mold on a fitter's platform. The pre-molding mold and the demolding fixture are soaked in a 3% SW-1 n-hexane solution and dried. After thoroughly cleaning with absolute ethanol and air-drying naturally, a columnar body is obtained.

[0082] Experimental Example 1 Surface Wettability Test

[0083] Referring to the surface contact angle / rolling angle standard measurement test (the contact angle test uses the ISO 19403-2 international standard to measure the static contact angle by the sessile drop method, and the rolling angle test uses the inclined platform method to measure), the rolling angle tests are respectively carried out on the columnar bodies prepared in Examples 1-5 and Comparative Examples 1-3, and the medium is demineralized water. The contact angle and rolling angle test results are shown in Figure 2 .

[0084] From Figure 2 It can be seen that the contact angles of Examples 1, 2, and 5 are significantly larger than those of the superhydrophobic columnar bodies in the comparative examples, and the rolling angles of Examples 1, 2, and 5 are significantly smaller than those of the superhydrophobic columnar bodies in the comparative examples, indicating that the super wear-resistant and superhydrophobic columnar body described in the present invention has more excellent liquid repellent performance. This is because the surface of the superhydrophobic columnar body prepared in the present invention is continuous and complete, and the nano-components are distributed in large quantities and uniformly dispersed in the system, which provides a stable rough geometric structure. At the same time, due to the low surface energy chemical properties of the hydrophobic modified nano-components, the stamped columnar body has the property of superhydrophobicity on the surface.

[0085] Experimental Example 2 Abrasion Resistance Test

[0086] Select the ASTM D4060 type Taber abrasion tester and the rigid ceramic grinding wheel H-18 to evaluate the abrasion resistance of the material under a load of 1000 g. Each rotation is regarded as one abrasion cycle, and the change in the wettability of the material after 1000 abrasion cycles is measured and recorded. The test results are shown in Figure 3 .

[0087] From Figure 3 It can be seen that after 1000 abrasion cycles of the 1000 g grinding wheel for the superhydrophobic column bodies of Examples 1-5 and Comparative Example 1, the surface contact angle is still higher than 145°, and the rolling angle is lower than 15°. In particular, the contact angles of the superhydrophobic column bodies of Examples 1-3 are still above 150°. By comparison, it can be known that the abrasion resistance of the superhydrophobic column bodies of Examples 1-2 is significantly higher than that of other columns. It shows that the super wear-resistant and superhydrophobic column body of the present invention has stronger mechanical abrasion resistance.

[0088] Analysis shows that the superhydrophobic column body is composed of a continuous porous RTV three-dimensional structure and three-dimensionally dispersed SiO2 (18 wt%) particles superimposed without residue. Nano-SiO2 particles are the most commonly used reinforcing agents for room temperature vulcanized silicone rubber RTV, but the SiO2 with -OH on its surface has poor affinity with the RTV polymer and is prone to intermolecular slip and fracture under external force. The active -OH and OTS enable the nano-particles to be coated with an organic monolayer under the action of the condensation reaction, thereby improving the wettability, uniform dispersion and interfacial bonding strength with the non-polar macromolecules of RTV. At the same time, the stamping process is used to realize the directional arrangement and densification combination of the nano-fillers and the matrix material, so that the superhydrophobic column body has super wear-resistant characteristics, which not only retains the advantages of low energy consumption and high compatibility of the traditional process, but also endows the material with superhydrophobic characteristics through microstructural design.

[0089] Experimental Example 3 Anti-icing Test

[0090] Take the super wear-resistant and superhydrophobic column bodies prepared in Examples 1-5 and Comparative Examples 1-3 as the experimental group, use a polytetrafluoroethylene through mold with an inner diameter of 10 mm and a height of 15 mm as the ice freezing carrier, place the carrier horizontally at -10 °C and fill it with water, and record the ice adhesion strength of each "icing-deicing" process through a thrust tester after freezing for 3 hours. Measure the contact angle afterwards and test the change relationship of the ice adhesion strength during 20 cycles of icing / deicing. The test results are as Figure 4 shown.

[0091] From Figure 4It can be seen that in Examples 1 and 2, the ice adhesion strength is less than 20 kPa within 5 freeze / thaw cycles, and is about 30 kPa at 20 cycles. The ice adhesion strength increases with the increase of the number of cycles. In Examples 3 - 5, the ice adhesion strength is less than 30 kPa within 5 freeze / thaw cycles, and less than 50 kPa at 20 cycles. The ice adhesion strength increases with the increase of the number of cycles. The ice adhesion strength of Comparative Examples 1 - 3 is higher than 60 kPa at 20 freeze / thaw cycles. It shows that the superhydrophobic columnar bodies prepared in Examples 1 - 5 of the present invention have lower ice adhesion strength, indicating that the superwear-resistant and superhydrophobic columnar bodies prepared by the present invention have more excellent anti-icing and ice resistance performance.

[0092] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A super wear-resistant super hydrophobic column, characterized in that: The super-hydrophobic column is composed of a polymer and super-hydrophobic nanoparticles in the polymer; the mass ratio of the polymer to the super-hydrophobic nanoparticles in the polymer is 100:(6-18); the polymer is room temperature vulcanized silicone rubber, fluorosilicone resin or epoxy resin.

2. The super wear-resistant super hydrophobic column according to claim 1, characterized in that: The raw materials for preparing the super-hydrophobic nanoparticles include a modifying liquid and a particle dispersion liquid, and the mass ratio of the modifying liquid to the dispersion liquid is 1:(50-70).

3. The super wear-resistant super hydrophobic column according to claim 2, characterized in that: The modified liquid is prepared from a low surface energy modifier and anhydrous ethanol, wherein the mass ratio of the surfactant to the anhydrous ethanol is 1:(5-10); the low surface energy modifier is perfluorooctyltriethoxysilane or n-octyltriethoxysilane.

4. The super wear-resistant super hydrophobic column according to claim 2, characterized in that: The particle dispersion is prepared from nanoparticles and anhydrous ethanol, wherein the mass ratio of the nanoparticles to the anhydrous ethanol is 1:(20-30); the nanoparticles are one or more of silicon dioxide particles, aluminum oxide particles, and zinc oxide particles; and the particle size of the nanoparticles is 10nm-40nm.

5. A method for preparing a super-wear-resistant super-hydrophobic column as claimed in any one of claims 1 to 4, characterized in that: The following steps are involved: (1) dissolving a low surface energy modifier in anhydrous ethanol to prepare a modified solution; Meanwhile, the nanoparticles are dispersed in anhydrous ethanol, and then ultrasonic vibration is performed to fully disperse the nanoparticles in the ethanol to obtain a particle dispersion; (2) adding the modified liquid to the particle dispersion and continuously stirring on a heating table; washing repeatedly with ethanol and placing in a freeze drying oven, and after drying, obtaining super hydrophobic nanoparticles; (3) fully mixing the super-hydrophobic nanoparticles and the polymer, and stirring on a stirring table to make the nanoparticles uniformly dispersed in the polymer to form micelles; (4) loading the micro-micelles prepared in step (3) into a polytetrafluoroethylene forming mold, compacting the material using a stamping platform, and then placing the block in an oven for continuous curing; (5) The formed blank is taken out from the polytetrafluoroethylene mold on a bench work platform with the aid of a demoulding fixture, and the superhydrophobic column is obtained after being fully washed with anhydrous ethanol and naturally dried.

6. The method for preparing the super wear-resistant super hydrophobic column according to claim 5, characterized in that: In step (1), a low surface energy modifier and anhydrous ethanol are mixed, and stirred at a speed of 500 to 1000 r / min for 5 to 15 minutes to obtain a modified liquid; nanoparticles and anhydrous ethanol are mixed, and ultrasonic oscillation is performed for 20 to 40 minutes to obtain a particle dispersion.

7. The method for preparing the super wear-resistant super hydrophobic column according to claim 5, characterized in that: In step (2), the modified liquid is added to the particle dispersion and stirred at a speed of 500 to 1000 r / min for 10 to 30 hours on a heating table at 50 to 70°C.

8. The method for preparing the super wear-resistant super hydrophobic column according to claim 5, characterized in that: In step (3), the stirring conditions are: first stirring at 400-600 r / min for 2-5 min, then increasing the speed to 1800-2400 r / min and stirring for 3-6 min.

9. The method for preparing the super wear-resistant super hydrophobic column according to claim 5, characterized in that: In step (4), the stamping parameters are 0.4-0.6 MPa, 1-2 Hz, and 3 min; after stamping, the blank is placed in an oven at 50-60° C. and cured for 96 hours.

10. The method for preparing the super wear-resistant super hydrophobic column according to claim 5, characterized in that: In step (5), the molding mold and demoulding fixture are prepared by soaking in 1-5% SW-1 n-hexane solution and drying; the molding mold is a cylindrical shell with a wall thickness of 2 mm, an inner diameter of 30 mm, and a height of 30 mm.

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