Preparation method of high-hydrophilicity DLC (Diamond Like Carbon) film
By forming a nitride or oxide layer on the surface of the DLC film and combining with water vapor treatment, the problem of insufficient hydrophilicity of the DLC film is solved, and the preparation of a highly hydrophilic DLC film is achieved, which expands its application range.
Patent Information
- Application Number
- CN202410221014.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-28
- Publication Date
- 2025-08-29
AI Technical Summary
The surface of DLC film has low hydrophilicity, which leads to prone to accumulation of water droplets in specific environments, limiting its application range.
The surface hydrophilicity of the DLC film is improved by injecting nitrogen or oxygen under vacuum and treated in water vapor environment.
The surface hydrophilicity of the DLC film is significantly improved, and the contact angle is reduced from 110° to below 50°, which improves the surface roughness, avoids water droplet accumulation, and expands the application range.
Smart Images
Figure CN120555985A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of thin film preparation, in particular to a method for preparing a highly hydrophilic DLC film. Background Art
[0002] DLC (Diamond-like Carbon) film is a material with excellent physical and chemical properties and has been widely used in coatings, optical components, biomedicine, mechanical engineering and other fields. However, a disadvantage of DLC film is that its surface hydrophilicity is generally low, which will cause it to easily accumulate water droplets in certain environments, limiting its application range. Therefore, it is necessary to improve the surface hydrophilicity of DLC films. Summary of the Invention
[0003] The purpose of the embodiments of the present invention is to provide a method for preparing a highly hydrophilic DLC film, by injecting nitrogen or oxygen into the surface of the DLC film so that nitride or oxide is formed on the surface of the DLC film, thereby improving the surface hydrophilicity of the DLC film and expanding its application range.
[0004] To achieve the above object, an embodiment of the present invention provides a method for preparing a highly hydrophilic DLC film, comprising:
[0005] preparing a pristine DLC film;
[0006] Injecting nitrogen or oxygen into the surface of the original DLC film under a vacuum environment and maintaining it for a first preset time to obtain a first DLC film;
[0007] In a water vapor environment, maintaining a preset temperature and a preset relative humidity, the first DLC film is placed for a second preset time to obtain a second DLC film;
[0008] The second DLC film is cleaned and dried to obtain a highly hydrophilic DLC film.
[0009] Furthermore, the preparation of the original DLC film specifically includes:
[0010] The original DLC film was prepared by physical vapor deposition; wherein the preparation conditions of the original DLC film included: an initial pressure of 5×10 -3 Pa, the ion assist source power is 300W, and the arc power is 10W.
[0011] Furthermore, the first preset time is 60 minutes.
[0012] Furthermore, the preset temperature is 110°C.
[0013] Furthermore, the preset relative humidity is 90%.
[0014] Furthermore, the second preset time is 120 minutes.
[0015] Furthermore, the second DLC film is cleaned and dried to obtain a highly hydrophilic DLC film, specifically comprising:
[0016] performing a first flushing treatment on the second DLC film using nitrogen;
[0017] After the first rinsing, the second DLC film is rinsed for the second time using deionized water;
[0018] The second DLC film after the second washing is dried to obtain a highly hydrophilic DLC film.
[0019] Compared to the prior art, the present invention provides a method for preparing a highly hydrophilic DLC film. First, a raw DLC film is prepared. Next, nitrogen or oxygen is injected into the surface of the raw DLC film under a vacuum environment for a first preset time to obtain a first DLC film. The first DLC film is then placed in a water vapor environment at a preset temperature and relative humidity for a second preset time to obtain a second DLC film. Finally, the second DLC film is cleaned and dried to obtain a highly hydrophilic DLC film. By injecting nitrogen or oxygen into the surface of the DLC film, the present invention forms nitrides or oxides on the surface of the DLC film, thereby increasing the surface hydrophilicity of the DLC film and expanding its application range. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 The present invention provides a flow chart of a preferred embodiment of a method for preparing a highly hydrophilic DLC film. DETAILED DESCRIPTION
[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this technical field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.
[0022] The present invention provides a method for preparing a highly hydrophilic DLC film. Figure 1 FIG. 1 is a flow chart of a preferred embodiment of a method for preparing a highly hydrophilic DLC film provided by the present invention, wherein the method comprises steps S11 to S14:
[0023] Step S11, preparing an original DLC film;
[0024] Step S12: Injecting nitrogen or oxygen into the surface of the original DLC film under a vacuum environment and maintaining the injection for a first preset time to obtain a first DLC film;
[0025] Step S13: in a water vapor environment, maintaining a preset temperature and a preset relative humidity, placing the first DLC film for a second preset time to obtain a second DLC film;
[0026] Step S14: cleaning and drying the second DLC film to obtain a highly hydrophilic DLC film.
[0027] In the specific implementation, first, an original DLC film is prepared; then, a gas injection operation is performed, that is, in a vacuum environment, nitrogen or oxygen or other gases are injected into the surface of the original DLC film, and maintained for a first preset time, so that a surface layer of nitride or oxide is formed on the surface of the original DLC film, and a first DLC film is obtained accordingly; then, a solution coating operation is performed, that is, the first DLC film is taken out of the vacuum environment and placed in a water vapor environment, the temperature of the water vapor is maintained at a preset temperature, and the relative humidity of the water vapor is maintained at a preset relative humidity, and the first DLC film is placed in this environment for a second preset time, and a second DLC film is obtained accordingly; finally, the second DLC film is taken out of the water vapor environment, and the second DLC film is cleaned and dried, and a highly hydrophilic DLC film is obtained accordingly.
[0028] It should be noted that gases such as nitrogen and oxygen can form surface layers of oxides and nitrides on the surface of the DLC film, thereby improving the hydrophilicity of the DLC film surface, and through solution coating, a solution with low surface tension can form a uniform coating on the surface of the DLC film, thereby further improving the hydrophilicity of the DLC film surface.
[0029] In one optional embodiment, the preparation of the original DLC film specifically includes:
[0030] The original DLC film was prepared by physical vapor deposition; wherein the preparation conditions of the original DLC film included: an initial pressure of 5×10 -3 Pa, the ion assist source power is 300W, and the arc power is 10W.
[0031] Specifically, in combination with the above embodiment, when preparing the original DLC film, the physical vapor deposition (PVD) method can be used to prepare the original DLC film, and when the PVD method is used to prepare the original DLC film, the initial pressure is 5×10 -3Pa, the evaporated carbon source was pure aromatic gas-phase carbon, the auxiliary electrode was stainless steel, the ion-assisted source power was 300 W, and the arc power was 10 W.
[0032] For example, the specific implementation process of the embodiment of the present invention is as follows: First, the original DLC film is prepared by physical vapor deposition, and the initial pressure is 5×10 -3 Pa, the evaporated carbon source is pure aromatic gas-phase carbon, the auxiliary electrode is stainless steel, the ion-assisted source power is 300W, and the arc power is 10W; then, a gas injection operation is performed, that is, in a vacuum environment, nitrogen or oxygen and other gases are injected into the surface of the original DLC film, and maintained for a first preset time, so that a surface layer of nitride or oxide is formed on the surface of the original DLC film, and a first DLC film is obtained accordingly; then, a solution coating operation is performed, that is, the first DLC film is taken out of the vacuum environment, and placed in a water vapor environment, the temperature of the water vapor is maintained at a preset temperature, and the relative humidity of the water vapor is maintained at a preset relative humidity, the first DLC film is placed in this environment for a second preset time, and a second DLC film is obtained accordingly; finally, the second DLC film is taken out of the water vapor environment, and the second DLC film is cleaned and dried, and a highly hydrophilic DLC film is obtained accordingly.
[0033] In one optional embodiment, the first preset time is 60 minutes.
[0034] Specifically, in combination with the above embodiment, when nitrogen or oxygen or other gases are injected into the surface of the original DLC film under a vacuum environment, the first preset time maintained is about 60 minutes.
[0035] For example, the specific implementation process of the embodiment of the present invention is as follows: First, the original DLC film is prepared by physical vapor deposition, and the initial pressure is 5×10 -3 Pa, the evaporated carbon source is pure aromatic gas-phase carbon, the auxiliary electrode is stainless steel, the ion-assisted source power is 300W, and the arc power is 10W; then, a gas injection operation is performed, that is, in a vacuum environment, nitrogen or oxygen and other gases are injected into the surface of the original DLC film and maintained for about 60 minutes, so that a surface layer of nitride or oxide is formed on the surface of the original DLC film, and a first DLC film is obtained accordingly; then, a solution coating operation is performed, that is, the first DLC film is taken out of the vacuum environment and placed in a water vapor environment, the temperature of the water vapor is maintained at a preset temperature, and the relative humidity of the water vapor is maintained at a preset relative humidity, the first DLC film is placed in this environment for a second preset time, and a second DLC film is obtained accordingly; finally, the second DLC film is taken out of the water vapor environment, and the second DLC film is cleaned and dried, and a highly hydrophilic DLC film is obtained accordingly.
[0036] In one optional embodiment, the preset temperature is 110°C.
[0037] Specifically, in combination with the above embodiment, when the first DLC film is placed in a water vapor environment, the water vapor needs to maintain a preset temperature of 110°C.
[0038] In one optional embodiment, the preset relative humidity is 90%.
[0039] Specifically, in combination with the above embodiment, when the first DLC film is placed in a water vapor environment, the water vapor needs to maintain a preset relative humidity of 90%.
[0040] For example, the specific implementation process of the embodiment of the present invention is as follows: First, the original DLC film is prepared by physical vapor deposition, and the initial pressure is 5×10 -3 Pa, the evaporated carbon source is pure aromatic gas-phase carbon, the auxiliary electrode is stainless steel, the ion-assisted source power is 300W, and the arc power is 10W; then, a gas injection operation is performed, that is, in a vacuum environment, nitrogen or oxygen and other gases are injected into the surface of the original DLC film and maintained for about 60 minutes, so that a surface layer of nitride or oxide is formed on the surface of the original DLC film, and a first DLC film is obtained accordingly; then, a solution coating operation is performed, that is, the first DLC film is taken out of the vacuum environment and placed in a water vapor environment, maintaining the water vapor temperature at 110°C and the relative humidity of the water vapor at 90%, and the first DLC film is placed in this environment for a second preset time, and a second DLC film is obtained accordingly; finally, the second DLC film is taken out of the water vapor environment, and the second DLC film is cleaned and dried, and a highly hydrophilic DLC film is obtained accordingly.
[0041] In one optional embodiment, the second preset time is 120 minutes.
[0042] Specifically, in combination with the above embodiment, when the first DLC film is placed in a water vapor environment, the second preset time maintained is about 120 minutes (ie, 2 hours).
[0043] For example, the specific implementation process of the embodiment of the present invention is as follows: First, the original DLC film is prepared by physical vapor deposition, and the initial pressure is 5×10 -3Pa, the evaporated carbon source is pure aromatic gas-phase carbon, the auxiliary electrode is stainless steel, the ion auxiliary source power is 300W, and the arc power is 10W; then, a gas injection operation is performed, that is, in a vacuum environment, nitrogen or oxygen and other gases are injected into the surface of the original DLC film and maintained for about 60 minutes, so that a surface layer of nitride or oxide is formed on the surface of the original DLC film, and a first DLC film is obtained accordingly; then, a solution coating operation is performed, that is, the first DLC film is taken out of the vacuum environment and placed in a water vapor environment, maintaining the water vapor temperature at 110°C and the relative humidity of the water vapor at 90%, and the first DLC film is placed in this environment for 120 minutes, and a second DLC film is obtained accordingly; finally, the second DLC film is taken out of the water vapor environment, and the second DLC film is cleaned and dried, and a highly hydrophilic DLC film is obtained accordingly.
[0044] In one optional embodiment, the cleaning and drying of the second DLC film to obtain a highly hydrophilic DLC film specifically includes:
[0045] performing a first flushing treatment on the second DLC film using nitrogen;
[0046] After the first rinsing, the second DLC film is rinsed for the second time using deionized water;
[0047] The second DLC film after the second washing is dried to obtain a highly hydrophilic DLC film.
[0048] Specifically, in combination with the above embodiment, when cleaning and drying the second DLC film, the second DLC film can be first rinsed with nitrogen, and then the second DLC film after the first rinse is rinsed with deionized water for a second time to rinse the second DLC film clean. Thereafter, the second DLC film after the second rinse is dried to obtain a highly hydrophilic DLC film.
[0049] For example, the specific implementation process of the embodiment of the present invention is as follows: First, the original DLC film is prepared by physical vapor deposition, and the initial pressure is 5×10 -3Pa, the evaporated carbon source is pure aromatic gas-phase carbon, the auxiliary electrode is stainless steel, the ion-assisted source power is 300 W, and the arc power is 10 W; then, a gas injection operation is performed, that is, nitrogen or oxygen is injected into the surface of the original DLC film under a vacuum environment and maintained for about 60 minutes, so that a surface layer of nitride or oxide is formed on the surface of the original DLC film, thereby obtaining a first DLC film; then, a solution coating operation is performed, that is, the first DLC film is removed from the vacuum environment and placed in a water vapor environment, maintaining the water vapor temperature at 110° C. and the relative humidity of the water vapor at 90%, and the first DLC film is placed in this environment for 120 minutes, thereby obtaining a second DLC film; finally, the second DLC film is removed from the water vapor environment, first rinsed with nitrogen for the first time, and then rinsed with deionized water for the second time to rinse the second DLC film cleanly, and then the second DLC film after the second rinse is dried, thereby obtaining a highly hydrophilic DLC film.
[0050] It should be noted that by comparing the surface properties of the original DLC film and the final highly hydrophilic DLC film, such as roughness, contact angle and other indicators, the results show that the hydrophilicity of the final highly hydrophilic DLC film is significantly improved, and the contact angle is reduced from 110° to below 50°. At the same time, its surface roughness is also improved to a certain extent.
[0051] Therefore, the surface hydrophilicity of the highly hydrophilic DLC film prepared by the embodiment of the present invention is significantly improved. During the use of the coating, water droplets will not accumulate on the surface of the highly hydrophilic DLC film, showing good hydrophilicity and durability.
[0052] In summary, the present invention provides a method for preparing a highly hydrophilic DLC film. First, a raw DLC film is prepared. Next, nitrogen or oxygen is injected into the surface of the raw DLC film under a vacuum environment and maintained for a first preset time to obtain a first DLC film. Then, the first DLC film is placed in a water vapor environment at a preset temperature and relative humidity for a second preset time to obtain a second DLC film. Finally, the second DLC film is cleaned and dried to obtain a highly hydrophilic DLC film. By injecting nitrogen or oxygen into the surface of the DLC film, the present invention forms a corresponding nitride or oxide on the surface of the DLC film, thereby improving the hydrophilicity of the DLC film surface. Furthermore, by solution coating, a low surface tension solution can form a uniform coating on the surface of the DLC film, further improving the hydrophilicity of the DLC film surface, thereby expanding its application range.
[0053] In addition, the embodiments of the present invention do not require the use of complex equipment and chemical reagents, the method is simple, easy to implement, has a wide range of applications, can be produced and applied on a large scale, and has good production and application prospects.
[0054] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.
Claims
1. A method for preparing a highly hydrophilic DLC film, characterized in that: include: preparing a pristine DLC film; Injecting nitrogen or oxygen into the surface of the original DLC film under a vacuum environment and maintaining it for a first preset time to obtain a first DLC film; In a water vapor environment, maintaining a preset temperature and a preset relative humidity, the first DLC film is placed for a second preset time to obtain a second DLC film; The second DLC film is cleaned and dried to obtain a highly hydrophilic DLC film.
2. The method for preparing a highly hydrophilic DLC film according to claim 1, wherein: The preparation of the original DLC film specifically includes: The original DLC film was prepared by physical vapor deposition; wherein the preparation conditions of the original DLC film included: an initial pressure of 5×10 -3 Pa, the ion assist source power is 300W, and the arc power is 10W.
3. The method for preparing a highly hydrophilic DLC film according to claim 1, wherein: The first preset time is 60 minutes.
4. The method for preparing a highly hydrophilic DLC film according to claim 1, wherein: The preset temperature is 110°C.
5. The method for preparing a highly hydrophilic DLC film according to claim 1, wherein: The preset relative humidity is 90%.
6. The method for preparing a highly hydrophilic DLC film according to claim 1, wherein: The second preset time is 120 minutes.
7. The method for preparing a highly hydrophilic DLC film according to any one of claims 1 to 6, wherein: The cleaning and drying of the second DLC film to obtain a highly hydrophilic DLC film specifically includes: performing a first flushing treatment on the second DLC film using nitrogen; After the first rinsing, the second DLC film is rinsed for the second time using deionized water; The second DLC film after the second washing is dried to obtain a highly hydrophilic DLC film.