A transparent, wear-resistant, super-repellent surface film treatment liquid and its application

Abstract

The present invention provides a transparent, wear-resistant, super-repellent surface film treatment liquid and its application. The treatment liquid is composed of ethanol, saturated positive carbon monohydric alcohol with carbon atoms of 8 to 10, saturated monobasic fatty acid with carbon atoms of 13 to 15 and ultrafine biomass powder. The treatment liquid can form a transparent, wear-resistant, super-repellent surface film layer on the surface of various materials such as metal, ceramic or glass by impregnation and then infrared thermal radiation curing. The treatment liquid of the present invention has simple composition, low cost, simple and efficient preparation method, is suitable for surface treatment of various materials such as metal, ceramic, glass and the like of any shape and size, and has broad prospects for promotion and application.

Description

Technical Field

[0001] The present invention belongs to the technical field of surface treatment, and specifically relates to a surface treatment liquid and a preparation method thereof, as well as a method for preparing a transparent, wear-resistant and super-repellent surface film based on the treatment liquid. Background Art

[0002] Materials such as metal, ceramic, and glass are widely used in various fields. These materials are easily damaged by pollution and wear during use. Preparing transparent, wear-resistant, and ultra-phobic surface films on the surfaces of these materials can effectively resist common pollution and wear damage while maintaining the appearance of the materials, thereby improving the service quality of the materials and extending the service life of the materials.

[0003] At present, there are a large number of patents for preparing super-repellent surface films, such as CN201010272135.5, CN201010298897.2, CN201210314685.8, CN201210278261.0, CN201410455019.5, CN201711106428.4, CN201911128570.8, CN202110482450.9, etc. There are also a small number of patents such as CN201510215101.5, CN201510998106.X, etc., which achieve wear resistance and super-repellent by adding wear-resistant particles, but due to the presence of wear-resistant particles, the film layer is usually opaque, affecting the appearance of the material. In addition, the treatment solution for preparing wear-resistant and super-repellent surface films is usually complex in components, the preparation steps are cumbersome, and there are strict restrictions on the shape and size of the workpiece.

[0004] Therefore, how to simply and efficiently prepare a transparent, wear-resistant, and super-repellent surface film, and achieve surface wear resistance and super-repellent while maintaining the appearance of the material is a technical problem that technicians in this field need to solve urgently. Summary of the invention

[0005] In view of the difficulties and problems existing in the prior art, the purpose of the present invention is to provide a surface treatment liquid with simple composition and low cost and a simple and efficient preparation method, as well as a method for preparing a transparent, wear-resistant, super-repellent surface film on the surface of metal, ceramic, glass and other materials based on this treatment liquid.

[0006] The object of the present invention is achieved in that:

[0007] The present invention provides a transparent, wear-resistant, super-repellent surface film treatment liquid, which is prepared from ethanol, a saturated positive carbon monohydric alcohol with 8 to 10 carbon atoms, a saturated monobasic fatty acid with 13 to 15 carbon atoms, and biomass ultrafine powder in the following proportions;

[0008] The volume ratio of the ethanol to the saturated positive carbon monohydric alcohol having 8 to 10 carbon atoms is 7 to 9:3 to 1, and the two are uniformly mixed to form an alcohol solvent;

[0009] The mass percentage of the saturated monobasic fatty acid with 13 to 15 carbon atoms in the alcohol solvent is 0.5% to 2%;

[0010] The content of the biomass ultrafine powder in the alcohol solvent is 0.5-1.5 g / L.

[0011] Furthermore, the biomass ultrafine powder is prepared by the following method: clean safflower leaves and birch bark are mixed at a fresh weight ratio of 3 to 5:1, freeze-dried at -20 to -40°C for 24 to 48 hours, and then ultrafinely ground into biomass ultrafine powder.

[0012] Furthermore, the preparation method of the transparent, wear-resistant, super-repellent surface film treatment liquid comprises:

[0013] According to the above formula, ethanol and any one of the saturated positive carbon monohydric alcohols with carbon atoms of 8 to 10 are uniformly mixed to form an alcohol solvent, any one of the saturated monohydric fatty acids with carbon atoms of 13 to 15 is uniformly dispersed in the alcohol solvent to form a solution, and then the biomass ultrafine powder is uniformly dispersed in the above solution, and the liquid obtained by ultrasonic stirring at 40 to 60° C. for 3 to 5 hours and then centrifuged is the treatment liquid.

[0014] Furthermore, the present invention also provides an application of the transparent, wear-resistant, super-repellent surface film treatment liquid, which is used to prepare a transparent, wear-resistant, super-repellent surface film, comprising the following steps:

[0015] ①Immerse the surface of the workpiece to be treated evenly in the above treatment liquid. The ratio of the workpiece area to the volume of the treatment liquid is 1.0m 2 : 100~250mL.

[0016] ② The workpiece immersed in the treatment liquid is cured by an infrared heat radiation source for 1 to 3 minutes, and a transparent, wear-resistant, super-repellent surface film is obtained on the surface of the workpiece. The workpiece can be a metal, ceramic or glass material of any shape and size.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The treatment liquid of the present invention is based on the fact that the dissolution of two kinds of biomass ultrafine powders in alcohol solvents has excellent anti-fouling, anti-rust and adhesive effects, and can form an organic adsorption film with a buffering effect on the surface of the material under infrared light irradiation with a saturated monobasic fatty acid with a medium carbon chain length as the same solute, giving the film layer long-lasting binding force, anti-fouling and wear resistance and other properties; based on the low surface energy of the saturated positive carbon monohydric alcohol with a medium carbon chain length as a co-solvent and the saturated monobasic fatty acid as a solute, the film layer is given a super-phobic property; based on the fact that the obtained treatment liquid has no solid particles and is transparent, the film layer is given a transparent property; the above-mentioned synergistic effect of the components in the treatment liquid ensures that a transparent, wear-resistant and super-phobic surface film can be simply and efficiently prepared on the surface of materials such as metals, ceramics, and glass.

[0019] 2. The treatment liquid of the present invention is composed of organic alcohol, saturated fatty acid, and ultrafine biomass powder, with simple ingredients and low cost; the preparation process of the treatment liquid only involves simple operations such as uniform mixing, dispersion, stirring, and centrifugation, and is easy to mass produce; the surface film preparation steps only involve immersion and infrared thermal radiation curing, which is time-saving, simple, efficient, and easy to apply on a large scale in industrial applications.

[0020] 3. The present invention provides an application of the treatment liquid, which is used to prepare a transparent, wear-resistant, super-repellent surface film, which is suitable for the surface treatment of various materials such as metals, ceramics, glass, etc. of any shape and size. It can achieve wear resistance and super-repellent while maintaining the appearance of the above materials, and has broad prospects for promotion and application. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with specific examples. It should be noted that these examples are only used to illustrate the present invention, rather than to limit the present invention, and simple improvements to the method under the premise of the concept of the present invention all fall within the scope of protection claimed by the present invention.

[0022] Embodiment 1:

[0023] Processing object: 7075 aluminum alloy (working area 6.0cm 2 ), the specific steps of preparing a transparent, wear-resistant, super-hydrophobic surface film on its surface are as follows:

[0024] ① Preparation of treatment solution: Ethanol and n-octanol were uniformly mixed at a volume ratio of 9:1 to form 1L of alcohol solvent, 8.0g of tetradecanoic acid was weighed and uniformly dispersed in the above alcohol solvent to form a solution, and 1.5g of biomass ultrafine powder was weighed and uniformly dispersed in the above solution, and the liquid obtained by centrifugation after ultrasonic stirring at 40°C for 5h was the treatment solution. The biomass ultrafine powder was prepared by the following method: clean safflower leaves and birch bark were mixed at a fresh weight ratio of 5:1, freeze-dried at -20°C for 48h, and then ultrafinely crushed into biomass ultrafine powder.

[0025] ② Preparation of a transparent, wear-resistant, and super-repellent surface film: The cleaned surface of a 7075 aluminum alloy workpiece is uniformly immersed in 120 μL of the treatment solution obtained in ①, and then cured with an infrared thermal radiation source for 2 minutes to obtain a transparent, wear-resistant, and super-repellent surface film on the surface of the 7075 aluminum alloy workpiece.

[0026] The inspection steps are as follows (same for other embodiments):

[0027] a. Transparency test: Use German Leica DM4000M digital microscope to observe the light transmittance of the surface film to judge the transparency of the surface film. If the light transmittance is greater than 90%, the transparency is "excellent", if it is less than 50%, the transparency is "poor", and if it is between the two, the transparency is "medium".

[0028] b. Wear resistance test: 20 sheets of 100# metallographic sandpaper (each sheet is 230×280mm in size) are laid flat on the table to form a rough area of ​​112×115cm. One side of the workpiece contacts the sandpaper (the side is the working surface), and a 100g weight is pressed on the other side. The weight is dragged horizontally and vertically 50 times each to obtain a friction and wear sample. The German Leica DM4000M digital microscope is used to observe the wear marks on the sample surface to determine the wear resistance of the surface film; if the area of ​​the wear marks is less than 1% of the workpiece working surface area, the wear resistance is "excellent", if the area of ​​the wear marks is greater than 10% of the workpiece working surface area, the wear resistance is "poor", and if it is between the two, the wear resistance is "medium".

[0029] c. Superphobicity test: The German Dataphysics OCA20 video optical contact angle meter is used to measure the static contact angle of a water drop on the workpiece surface to determine the superphobicity of the surface film.

[0030] Test results: Microscope observation showed that the light transmittance of the surface film of 7075 aluminum alloy workpiece was 99%, and the film layer had excellent transparency; after the friction and wear test, no wear marks appeared on the surface film of the sample, showing excellent wear resistance; the static contact angle of water droplets on the sample surface was 155°, confirming that the surface film had superphobicity.

[0031] Embodiment 2-5:

[0032] The steps and property test methods for preparing transparent, wear-resistant, and super-repellent surface films are the same as those in Example 1, but the treatment objects and process parameters of each step are different. Table 1 lists the treatment liquid preparation conditions and biomass powder preparation conditions in Examples 2-5, and Table 2 lists the types / shapes / sizes of the treatment objects, surface film preparation conditions, and corresponding property test results in Examples 2-5. As can be seen from Table 2, the surface films prepared in each example all exhibit excellent transparency, wear resistance, and super-repellent properties.

[0033] Table 1 Treatment solution preparation conditions in Examples 2-5 (including biomass powder preparation conditions)

[0034]

[0035] Table 2 Type / shape / size of the treated object, surface film preparation conditions and corresponding property test results in Examples 2-5

[0036]

[0037] The above embodiments respectively treat 7075 aluminum alloy, pure copper, pure zinc, ceramics and glass of different shapes and sizes as treatment objects, and obtain transparent, wear-resistant and super-repellent surface films. The present invention is also applicable to other metals / alloys, ceramics and glass of any shapes and sizes, and can achieve wear resistance and super-repellent while maintaining the appearance of these materials; and the above surface film preparation steps only involve rapid impregnation and infrared thermal radiation curing, which is time-saving, simple, efficient, and has broad prospects for promotion and application.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the technical solution. Those skilled in the art should understand that those modifications or equivalent substitutions of the technical solution of the present invention that do not depart from the purpose and scope of the technical solution should be included in the scope of the claims of the present invention.

Claims

1. A transparent, wear-resistant, super-phobic surface film treatment liquid, characterized in that: The invention is prepared by mixing ethanol, saturated positive carbon monohydric alcohol with carbon atoms of 8 to 10, saturated monobasic fatty acid with carbon atoms of 13 to 15 and ultrafine biomass powder in the following proportions; The volume ratio of the ethanol to the saturated normal carbon monohydric alcohol having 8 to 10 carbon atoms is 7 to 9:3 to 1, and the two are uniformly mixed to form an alcohol solvent; The mass percentage of the saturated monobasic fatty acid with 13 to 15 carbon atoms in the alcohol solvent is 0.5% to 2%; The content of the biomass ultrafine powder in the alcohol solvent is 0.5-1.5 g / L; The biomass ultrafine powder is prepared by the following method: clean safflower leaves and birch bark are mixed at a fresh weight ratio of 3 to 5:1, freeze-dried at -20 to -40°C for 24 to 48 hours, and then ultrafinely ground into the biomass ultrafine powder.

2. The transparent, wear-resistant, super-phobic surface film treatment liquid according to claim 1, characterized in that: According to the formula, the preparation method comprises: Ethanol and any one of the saturated positive carbon monohydric alcohols with carbon atoms of 8 to 10 are uniformly mixed to form an alcohol solvent, any one of the saturated monohydric fatty acids with carbon atoms of 13 to 15 is uniformly dispersed in the alcohol solvent to form a solution, and then the biomass ultrafine powder is uniformly dispersed in the above solution, and the liquid obtained by centrifugation is the treatment liquid after ultrasonic stirring at 40 to 60° C. for 3 to 5 hours.

3. Application of a transparent, wear-resistant, super-repellent surface film treatment liquid, characterized in that: The method is used to prepare a transparent, wear-resistant and super-repellent surface film, comprising the following steps: ① The surface of the workpiece to be treated is uniformly immersed in the treatment liquid obtained in claim 2, and the ratio of the workpiece area to the volume of the immersed treatment liquid is 1.0 m 2 :100~250mL; ② The workpiece immersed in the treatment liquid is cured with an infrared thermal radiation source for 1 to 3 minutes, and a transparent, wear-resistant, super-repellent surface film is obtained on the surface of the workpiece.

4. The use of the transparent, wear-resistant, super-phobic surface film treatment liquid according to claim 3, characterized in that: The workpiece can be metal, ceramic or glass material of any shape and size.

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