Structural body with super-smooth structure, preparation method thereof and structural device with super-smooth structure
By introducing the connection between the film layer of the curved crosslinked shell body and the Van der Waals of the super-sliding film into the structural super-sliding system, the problems of single materials and small size in the prior art are solved, and the three-dimensional structure with large size is realized, reducing the ultra-sliding of the three-dimensional structure with a large size Friction and improve performance.
Patent Information
- Application Number
- CN202310685428.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-06-09
- Publication Date
- 2024-12-10
AI Technical Summary
The existing structural super-slip system has a single material and a small size, making it difficult to achieve large-size structural super-slip and cannot be expanded to a three-dimensional system.
The film layer including a curved crosslinked shell is connected to the superslide through the action of Van der Waals to form a three-dimensional structure superslide structure. The superslide can slide on the film layer, and the film layer is formed by graphene embedded in an amorphous carbon grid. , the content of hydrogen atoms is low, the height of the shell-like body is less than 5nm, and the size of the super-slip is much larger than that of the shell-like body, achieving a large-size structure super-slip.
The expansion from two-dimensional materials to three-dimensional systems has been achieved, the edge effect friction is reduced, the size and performance of the superslip structure is improved, the friction coefficient is as low as 0.003 and there is no wear.
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Figure CN119101883A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of structural super-slippery, and in particular to a structural super-slippery structure and a preparation method thereof, and a structural super-slippery device. Background Art
[0002] At present, structural super-slippery is based on two-dimensional materials (such as graphene, molybdenum disulfide and other two-dimensional materials), which are achieved through weak van der Waals interaction between layers. Therefore, the current structural super-slippery system has a single material, and the size of the structural super-slippery structure is relatively small, making it difficult to achieve large-scale structural super-slippery.
[0003] Therefore, how to solve the above technical problems should be the focus of technical personnel in this field. Summary of the invention
[0004] The purpose of the present application is to provide a structural super-slippery structure and a preparation method thereof, and a structural super-slippery device, so as to extend the structural super-slippery into a three-dimensional system and increase the size of the structural super-slippery.
[0005] In order to solve the above technical problems, the present application provides a super-slip structure, comprising:
[0006] Super Slip;
[0007] A thin film layer is in super-slip contact with the super-slip sheet, the super-slip sheet can slide on the thin film layer, and the thin film layer and the super-slip sheet are connected through van der Waals action. The thin film layer includes a plurality of curved cross-linked shell bodies, and the curved convex points of the shell bodies face the super-slip sheet.
[0008] Optionally, the percentage of hydrogen atoms in the thin film layer is less than 5%.
[0009] Optionally, the protrusion height of the shell-shaped body is less than 5 nm, and the height difference between the highest points of the protrusions of the shell-shaped body is less than 2 nm.
[0010] Optionally, the size of a single super-slip sheet is much larger than the size of a single shell-shaped body, and the super-slip sheet can cover a plurality of the shell-shaped bodies at the same time.
[0011] Optionally, the thin film layer structure is formed by embedding graphene into an amorphous carbon grid.
[0012] Optionally, also include:
[0013] The substrate is located on the surface of the thin film layer away from the ultra-slipper.
[0014] Optionally, the substrate includes a stainless steel substrate, a silicon substrate, or a ceramic substrate, and the shape of the surface of the substrate in contact with the thin film layer includes a flat surface and a curved surface.
[0015] The present application also provides a method for preparing a super-slip structure, comprising:
[0016] A thin film layer is prepared by chemical vapor deposition, wherein the thin film layer comprises a plurality of curved cross-linked shell-like bodies;
[0017] The super-slippery sheet is transferred to the surface of the thin film layer, the super-slippery sheet is in super-slip contact with the thin film layer, the super-slippery sheet and the thin film layer are connected by van der Waals action, and the super-slippery sheet can slide on the thin film layer to obtain a structural super-slippery structure; the curved convex point of the shell-shaped body faces the super-slippery sheet.
[0018] Optionally, the percentage of hydrogen atoms in the thin film layer is less than 5%.
[0019] Optionally, preparing the thin film layer by chemical vapor deposition includes:
[0020] CH 4 or C 2 H 2 The thin film layer is prepared as a gas source, the hardness of the thin film layer is between 15 and 30 GPa, the thickness is between 0.1 and 0.5 μm, and the surface roughness is ≤300 μm.
[0021] The present application also provides a structural super-slippery device, comprising any one of the structural super-slippery structures described above.
[0022] The present application provides a structural super-slip structure, comprising: a super-slip sheet; a thin film layer in super-slip contact with the super-slip sheet, the super-slip sheet slides on the thin film layer, and the thin film layer and the super-slip sheet are connected by van der Waals action, the thin film layer comprises a plurality of curved cross-linked shell-like bodies, and the curved convex points of the shell-like bodies face the super-slip sheet.
[0023] It can be seen that the structural super-slip structure in the present application includes a super-slip sheet and a thin film layer, and the thin film layer includes a curved cross-linked shell body, which can connect the thin film layer and the super-slip sheet through the van der Waals effect to achieve structural super-slip. The thin film layer is a three-dimensional material, which realizes the expansion of structural super-slip from a single two-dimensional material to a three-dimensional system, and can also realize a large-sized structural super-slip structure.
[0024] In addition, the present application also provides a preparation method and a structural super-slippery device having the above advantages. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0026] Figure 1 A schematic diagram of the structure of a super-slip structure provided in an embodiment of the present application;
[0027] Figure 2 This is a schematic diagram of the structure in which the shell-like bodies in the film layer in the embodiment of the present application are bent and cross-linked;
[0028] Figure 3 This is a friction characteristic diagram of the graphite super-slip sheet on the surface of the film layer in the embodiment of the present application;
[0029] Figure 4 This is a schematic diagram of the microstructure of the graphite super-slip sheet and the thin film layer in the embodiment of the present application;
[0030] Figure 5 The Raman spectrum of the surface where the graphite super-slip sheet contacts the carbon film layer in the embodiment of the present application;
[0031] Figure 6 A schematic diagram of the structure of another super-slip structure provided in an embodiment of the present application;
[0032] Figure 7 A flow chart of a method for preparing a super-slip structure provided in an embodiment of the present application. DETAILED DESCRIPTION
[0033] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.
[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0035] As described in the background technology section, the current structural super-lubricity system has a single material and the size of the structural super-lubricity structure is relatively small, making it difficult to achieve large-scale structural super-lubricity.
[0036] In view of this, the present application provides a structural super-slip structure, please refer to Figure 1 ,include:
[0037] Super Slide 1;
[0038] A thin film layer 2 is in super-slip contact with the ultra-slip sheet 1, the ultra-slip sheet 1 slides on the thin film layer 2, and the thin film layer 2 is connected to the ultra-slip sheet 1 through van der Waals action. The thin film layer 2 includes a plurality of curved cross-linked shell-like bodies, and the curved convex points of the shell-like bodies face the ultra-slip sheet 1.
[0039] The film layer 2 may be a nanostructured carbon film.
[0040] The film layer 2 includes a plurality of curved cross-linked shells, so that the super-slip sheet 1 and the film layer 2 are connected through van der Waals interaction to form a super-slip structure with a van der Waals interface structure. Due to the presence of the curved cross-linked shells, the film layer 2 and the super-slip sheet 1 are in a natural edge-free contact state, thereby effectively reducing the friction caused by the edge effect and achieving structural super-slip.
[0041] The schematic diagram of the structure of the shell in the film layer 2 is as follows Figure 2 As shown, it is in a curved cross-linked shape. Each shell is curved, and the curved convex point of the shell refers to the point on the area where the shell is curved and arched. The height of the curved convex points of the shells in the same layer does not need to be consistent. The convex height of the shell should generally be less than 5nm, and the height difference between the highest points of the shell convex should be less than 2nm.
[0042] The sizes of the individual shells can be the same or different, and the film layer 2 is composed of multiple layers of curved cross-linked shells, which can overlap or stagger each other. The thickness of the film layer 2 can also be set as needed, for example, the thickness of the film layer 2 can be 30 to 50 nm, which is not specifically limited here.
[0043] The size of the superslipper 1 is generally 1 μm to 100 μm, and the size of a single shell is generally 5 to 20 nm. The size of the superslipper 1 is much larger than that of a single shell, and the superslipper 1 can cover multiple shells simultaneously when moving.
[0044] The surface structure of the film layer 2 has good uniformity, and any position can be matched with the super-slip sheet 1 to achieve super-slip structure.
[0045] The percentage content of hydrogen atoms in the thin film layer 2 is less than 5%, for example, the percentage content of hydrogen atoms may be 5%, 4%, 3%, 2%, 1% and the like.
[0046] It should be noted that the type of the film layer 2 is not limited in the present application and can be selected at will.
[0047] As an implementation method, the structure of the film layer 2 is formed by embedding graphene into an amorphous carbon grid, wherein the size of the graphene is in the micrometer or nanometer order.
[0048] It should be pointed out that the type of the superslide 1 is not limited in this application, and it depends on the situation. The superslide 1 includes at least one of a two-dimensional conductor superslide, a two-dimensional semiconductor superslide, and a two-dimensional insulating superslide. Among them, the material of the two-dimensional conductor superslide includes but is not limited to graphite, graphene, niobium disulfide, and tantalum disulfide, the material of the two-dimensional semiconductor superslide includes but is not limited to molybdenum disulfide, tungsten diselenide, tungsten disulfide, and black phosphorus, and the material of the two-dimensional insulating superslide includes but is not limited to hexagonal boron nitride and mica.
[0049] In order to facilitate the transfer of the super-slippery sheet 1 onto the thin film layer 2 , the super-slippery structure may further include an island cover disposed on the surface of the super-slippery sheet 1 .
[0050] Taking the film layer 2 including graphene and amorphous carbon, and the superslip sheet 1 being a graphite superslip sheet as an example, the friction behavior of the superslip structure is tested using a nano friction tester. The friction force is 0.18 μN, the friction coefficient is as low as 0.003, and there is no wear. The friction characteristics of the graphite superslip sheet on the surface of the film layer 2 are as follows: Figure 3 As shown, the horizontal axis is the load and the vertical axis is the friction force. The graphite super-slippery sheet has excellent super-slip properties on the surface of the nanostructured carbon film layer in a high humidity environment.
[0051] The microstructure diagram of the graphite super-slip sheet 11 and the carbon film layer 21 including graphene and amorphous carbon is shown in FIG. Figure 4 As shown, the graphite super-slip sheet 11 is located on the surface of the carbon film layer 21 in a non-edge contact state.
[0052] The Raman spectrum of the surface of the graphite superslip sheet in contact with the carbon film layer including graphene and amorphous carbon is shown in FIG. Figure 5 As shown in the figure, the horizontal axis is the Raman frequency shift and the vertical axis is the intensity. Figure 5 It can be seen that the graphite super-slip sheet is at 1500cm -1 There is a strong peak at , indicating that the surface where the graphite super-slippery sheet contacts the carbon film layer is intact.
[0053] In this embodiment, the structural super-slip structure includes a super-slip sheet 1 and a thin film layer 2. The thin film layer 2 includes a curved cross-linked shell body, which can connect the thin film layer 2 and the super-slip sheet 1 through van der Waals interaction to achieve structural super-slip. The thin film layer 2 is a three-dimensional material, which realizes the expansion of structural super-slip from a single two-dimensional material to a three-dimensional system, and can also realize a large-sized structural super-slip structure.
[0054] Please refer to Figure 6Based on the above embodiments, in one embodiment of the present application, the super-slip structure further includes:
[0055] A substrate 3 is located on a surface of the thin film layer 2 that is away from the super-slipper 1 .
[0056] The substrate 3 includes but is not limited to a metal substrate such as a silicon substrate, a ceramic substrate, and a stainless steel substrate.
[0057] The shape of the surface of the substrate 3 in contact with the film layer 2 includes but is not limited to a plane, a curved surface or any other irregular and complex surface.
[0058] In this embodiment, by arranging the thin film layer 2 on different types of substrates 3 and substrate surfaces of various shapes, the application range of the super-slip structure can be expanded.
[0059] This application also provides a method for preparing a super-slip structure. Please refer to Figure 7 , the method comprising:
[0060] Step S101: preparing a thin film layer by chemical vapor deposition, wherein the thin film layer includes a plurality of curved cross-linked shell-like bodies.
[0061] The present application does not limit the relevant preparation parameters of chemical vapor deposition when preparing the thin film layer, and the parameters are adjusted according to the type of the thin film layer and the content of the structure in the thin film layer. For example, a thin film layer including graphene and amorphous carbon can be prepared by adjusting the chemical vapor deposition parameters.
[0062] As an implementation method, the percentage of hydrogen atoms in the thin film layer is less than 5%.
[0063] By adjusting the chemical vapor deposition parameters, the friction properties can be controlled.
[0064] Optionally, in one embodiment of the present application, preparing the thin film layer by chemical vapor deposition includes:
[0065] CH 4 or C 2 H 2 The thin film layer is prepared as a gas source, the hardness of the thin film layer is between 15 and 30 GPa, the thickness is between 0.1 and 0.5 μm, and the surface roughness is ≤300 μm.
[0066] The hardness of the thin film layer can be 15 GPa, 20 GPa, 25 GPa, 30 GPa, etc., and the thickness can be 0.1 μm, 0.2 μm, 0.4 μm, 0.5 μm, etc.
[0067] The chemical vapor deposition parameters can be adjusted according to different types of substrates.
[0068] The preparation is carried out by chemical vapor deposition, and there is no restriction on the surface shape of the substrate. It can be a plane, a curved surface or any other irregular complex shape, and the deposition on the substrate surface can be completed by adjusting the chemical vapor deposition parameters.
[0069] Step S102: Transferring the ultra-slippery sheet to the surface of the thin film layer, the ultra-slippery sheet is in super-slip contact with the thin film layer, the ultra-slippery sheet and the thin film layer are connected by van der Waals action, and the ultra-slippery sheet can slide on the thin film layer to obtain a structural ultra-slippery structure; the curved convex point of the shell-shaped body faces the ultra-slippery sheet.
[0070] The ultra-slipper is prepared by micromachining. The specific preparation process can refer to the relevant technology and will not be described in detail in this application.
[0071] The prepared super-slippery sheet can be transferred to the surface of the thin film layer with the help of a nanomanipulator.
[0072] The super-slip structure prepared in this embodiment includes a super-slip sheet and a thin film layer. The thin film layer includes a curved cross-linked shell body, which can connect the thin film layer and the super-slip sheet through van der Waals force to achieve super-slip structure. The thin film layer is a three-dimensional material, which realizes the expansion of super-slip structure from a single two-dimensional material to a three-dimensional system, and can also realize a large-sized super-slip structure.
[0073] The present application also provides a structural super-slippery device, which includes the structural super-slippery structure described in any of the above embodiments.
[0074] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.
[0075] The structural super-slippery structure and its preparation method, as well as the structural super-slippery device provided by the present application are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.
Claims
1. A super-slip structure, characterized in that: include: Super Slip; A thin film layer is in super-slip contact with the super-slip sheet, the super-slip sheet can slide on the thin film layer, and the thin film layer and the super-slip sheet are connected through van der Waals action. The thin film layer includes a plurality of curved cross-linked shell bodies, and the curved convex points of the shell bodies face the super-slip sheet.
2. The super-slip structure according to claim 1, characterized in that: The percentage of hydrogen atoms in the thin film layer is less than 5%.
3. The super-slip structure according to claim 1, characterized in that: The protrusion height of the shell-like body is less than 5nm, and the height difference between the highest points of the protrusions of the shell-like body is less than 2nm.
4. The super-slip structure according to claim 1, characterized in that: The size of a single super-slip sheet is much larger than the size of a single shell-shaped body, and the super-slip sheet can cover a plurality of shell-shaped bodies at the same time.
5. The super-slip structure according to claim 1, characterized in that: The thin film layer structure is formed by embedding graphene into an amorphous carbon grid.
6. The super-slip structure according to any one of claims 1 to 5, characterized in that: Also includes: The substrate is located on the surface of the thin film layer away from the ultra-slipper.
7. The super-slip structure according to claim 6, characterized in that: The substrate includes a stainless steel substrate, a silicon substrate, and a ceramic substrate, and the shape of the surface of the substrate in contact with the film layer includes a flat surface and a curved surface.
8. A method for preparing a super-slip structure, characterized in that: include: A thin film layer is prepared by chemical vapor deposition, wherein the thin film layer comprises a plurality of curved cross-linked shell-like bodies; Transferring the superslippery sheet to the surface of the film layer, the superslippery sheet and the film layer are in superslip contact, the superslippery sheet and the film layer are connected by van der Waals interaction, and the superslippery sheet can slide on the film layer to obtain a superslippery structure; The curved convex point of the shell-shaped body faces the super-slip sheet.
9. The method for preparing a super-slip structure according to claim 8, characterized in that: The percentage of hydrogen atoms in the thin film layer is less than 5%.
10. The method for preparing a super-slip structure according to claim 9, characterized in that: The thin film layers prepared by chemical vapor deposition include: The thin film layer is prepared by using CH4 or C2H2 as a gas source, the hardness of the thin film layer is between 15 and 30 GPa, the thickness is between 0.1 and 0.5 μm, and the surface roughness is ≤300 pm.
11. A super-slip structure device, characterized in that: Comprising the super-slip structure as described in any one of claims 1 to 7.