CN112892623A - Surface channel structure for droplet directional control and preparation method thereof - Google Patents
Surface channel structure for droplet directional control and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a surface channel structure for droplet directional control and a preparation method thereof.A super-hydrophilic channel structure distributed on a super-hydrophobic surface is formed by sequentially connecting a triangular structure and a plurality of isosceles trapezoid structures; controlling pulse laser by a computer to ablate periodically distributed micron cones and micron pit structures on the surface of the material by a cross scanning mode, alternately and densely distributing, and distributing nanoparticle structures on the peak-pit micron structures to form a dual-scale micro-nano structure surface; modifying the surface treated by the pulse laser with a low surface energy substance to obtain a super-hydrophobic surface; drawing a super-hydrophilic channel structure; and scanning the super-hydrophilic channel structure again on the super-hydrophobic surface by using pulse laser, and removing the low-surface-energy substance modification layer on the surface of the material, so that the super-hydrophobic characteristic of the area where the pattern is treated by the laser is converted into the super-hydrophilic characteristic, and the untreated area is still the super-hydrophobic characteristic, thereby obtaining the self-driven micro-droplet control structure with the super-hydrophobic-super-hydrophilic mixed structure.
Description
Technical Field
The invention relates to a surface channel structure for droplet directional control and a preparation method thereof, belonging to the technical field of droplet control and super-hydrophobic-super-hydrophilic surfaces.
Background
At present, droplets have attracted much attention as a new microfluidic technology with great development prospects, and the rapid development of the microfluidic technology can rapidly and accurately process and control the droplets.
The traditional conventional technology usually drives and controls the liquid drops in the micro-channel, which is difficult to be completed, so that the development of a simple, efficient, fast, accurate and low-cost method for droplet control is an urgent need in the field of microfluidics. As a novel analysis and detection platform, the microfluid chip has the advantages of high flux, integration, parallel multiple analysis, easy operation and the like, and is widely applied. However, the micro-fluidic system has disadvantages due to its own characteristics under certain experimental conditions, such as Taylor dispersion and cross contamination in the form of continuous flow of fluid in the micro-fluidic system, high sample requirement of the system, and long channel length, which need to be solved in practical application. In order to realize the precise monitoring and operation of the droplet system, it is necessary to develop more advanced and sensitive droplet detection technology, so that the microfluidic system is more intelligent and automatic.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a surface channel structure for droplet directional control and a preparation method thereof.
The purpose of the invention is realized by the following technical scheme:
a surface channel structure for droplet orientation control, characterized by: the surface channel structure is a super-hydrophilic channel structure distributed on a super-hydrophobic surface, and the super-hydrophilic channel structure is formed by sequentially connecting a triangular structure and a plurality of isosceles trapezoid structures.
Further, the above surface channel structure for droplet orientation control, wherein the starting position of the super-hydrophilic channel structure is a tip of a triangular structure, the bottom of the super-hydrophilic channel structure is connected with the narrow ends of the isosceles trapezoid structures, the adjacent structures are connected in a manner that the narrow end of the next structure is connected with the bottom of the previous structure, and a circular water storage area connected with the bottom of the last isosceles trapezoid structure is set up as the final arrival position of the droplet.
Further, the surface channel structure for droplet orientation control is described above, wherein the taper of the triangular structure is 3-15 °, and the length is 5-30 mm.
Further, the surface channel structure for droplet orientation manipulation described above, wherein the isosceles trapezoid structure is obtained by cutting off the upper half of the triangle structure.
The invention relates to a preparation method of a surface channel structure for droplet directional control, which comprises the following steps:
1) controlling pulse laser to ablate a micron cone and a micron pit structure which are periodically distributed on the surface of the material by a cross scanning mode, wherein the micron cone and the micron pit are alternately and densely distributed, and a nano particle structure is distributed on the peak-pit micron structure to form a double-scale micro-nano structure surface;
2) modifying the surface treated by the pulse laser with a low surface energy substance to obtain a super-hydrophobic surface, wherein the contact angle is larger than 150 degrees;
3) drawing super-hydrophilic channel structure by using computer CAD drawing software
4) And scanning the super-hydrophilic channel structure again on the super-hydrophobic surface by using pulse laser, removing the low-surface-energy substance modification layer on the surface of the material, converting the super-hydrophobic property of the region where the pattern is treated by the laser into the super-hydrophilic property, and still expressing the untreated region as the super-hydrophobic property to obtain the self-driven water collection pattern with the super-hydrophobic-super-hydrophilic mixed structure, wherein the micro-peak-micro-pit structure is converted into parallel micro-grooves, and the nano particles are converted into a nano fluff structure.
Furthermore, in the above method for preparing a surface channel structure for droplet orientation control, in step 1) and step 4), the pulsed laser is a nanosecond laser, a picosecond laser, or a femtosecond laser; the material is a metal or laser processable composite material.
Furthermore, in the above method for preparing a surface channel structure for droplet orientation control, in step 1), the pulsed laser is a femtosecond laser, the laser power is 10W, the wavelength is 1030nm, the pulse width is 450fs, the pulse frequency is 1MHz, the scanning speed is 80-150 mm/s, and the scanning distance is 0.03-0.05 mm.
Furthermore, in the above method for preparing a surface channel structure for droplet orientation control, in step 4), the pulsed laser is an infrared nanosecond laser, the laser power is 10W, the wavelength is 1064nm, the pulse width is 20ns, the pulse frequency is 20KHz, the scanning speed is 150-500 mm/s, and the scanning distance is 0.05-0.1 mm.
Furthermore, in the preparation method of the surface channel structure for droplet directional control, in step 4), the low surface energy substance modification adopts a liquid phase modification method, firstly, a stearic acid solution of absolute ethyl alcohol with the mass concentration of 0.01 mol/L-0.05 mol/L is prepared, the surface of the material after laser treatment is placed in the solution to be soaked for 0.5-1 hour at normal temperature, and then the material is obliquely and naturally dried in a dry natural environment.
Furthermore, in the above method for preparing a surface channel structure for droplet orientation control, in step 4), the superhydrophilic channel structure is scanned again by using pulse laser, firstly, the pulse laser scans the triangular, isosceles trapezoid and bottom circular outlines on the superhydrophobic surface in sequence, then, the filling lines in the outlines are scanned in the set scanning interval and the filling direction of the lines in the outlines, so as to complete preparation of the microgrooves in the outlines, the liquid droplets show superhydrophilic characteristics on the inner surface of the outlines, which is different from the cross scanning mode of the superhydrophobic surface, and the superhydrophilic surface adopts a one-way scanning to obtain the microgroove structure favorable for flow guiding.
Compared with the prior art, the invention has obvious advantages and beneficial effects, and is embodied in the following aspects:
firstly, the invention adopts a connection structure designed by the principle that Laplace pressure difference is generated on two sides of a triangular structure and an isosceles trapezoid structure along the direction of a main shaft due to different curvatures to drive surface liquid drops to transport, and can realize self-driven high-efficiency transportation of long-distance surface liquid drops in any direction;
secondly, the laser processing technology adopted for preparing the super-hydrophilic channel has the advantages of simple technology, high processing efficiency, controllability, precise and adjustable micron structural parameters, capability of preparing super-hydrophilic-super-hydrophobic complex mixed patterns on any surface and the like;
the super-hydrophilic channel structure is mainly applied to the field particularly when the amount and the direction of liquid drops need to be accurately controlled, for example, micro-drop control, a microbial chip, a medical experiment and the like, and different conveying channels can be formed by connecting and combining the change of the number and the angle of the isosceles trapezoid structures to perform directional control on the liquid drops.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram of a super-hydrophilic channel structure;
FIG. 2 is a schematic view of the connection of two adjacent channel structures in any direction;
FIG. 3a is a microscopic morphology photograph of a periodically distributed micro-peak-micro-pit structure of an ultra-hydrophobic region under a scanning electron microscope;
FIG. 3b is a scanning electron microscope photograph of nanoparticles on the surface of the micro-peak of the periodically distributed micro-peak-micro-pit structure of the superhydrophobic region under a scanning electron microscope;
FIG. 3c is a microscopic morphology photograph of a periodically distributed micro-peak-micro-groove structure of a super-hydrophilic region under a scanning electron microscope;
FIG. 3d is a scanning electron microscope photograph of nano-fluff on the surface of the micro-peak of the periodically distributed micro-peak-micro-pit structure in the super-hydrophilic region under a scanning electron microscope;
FIG. 4a is a photograph of contact angles of a superhydrophobic surface region;
FIG. 4b is a photograph of the contact angle of the superhydrophilic surface region;
FIG. 5a is a schematic structural view of a bent super-hydrophilic channel;
FIG. 5b is a schematic diagram of a circular super-hydrophilic channel structure;
FIG. 5c is a schematic view of a structure of a super-hydrophilic channel shaped like a Chinese character 8;
FIG. 6 is a photograph of three superhydrophilic channel structures in a droplet transport experiment.
The meaning of the respective reference numerals in the figures:
1-triangle-shaped structure, 2-isosceles trapezoid structure, 3-circular water storage district.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the directional terms and the sequence terms, etc. are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
As shown in fig. 1, the surface channel structure for droplet directional control is a super-hydrophilic channel structure distributed on a super-hydrophobic surface, and the super-hydrophilic channel structure is formed by sequentially connecting a triangular structure 1 and a plurality of isosceles trapezoid structures 2. The initial position of the super-hydrophilic channel structure is a triangular structure tip, the bottom of the super-hydrophilic channel structure is connected with the narrow ends of the isosceles trapezoid structures, the connection mode of the adjacent structures is that the narrow end of the next isosceles trapezoid is connected with the bottom of the previous isosceles trapezoid structure, and the bottom of the last isosceles trapezoid is provided with the circular water storage area 3 connected with the isosceles trapezoid structure as the final arrival position of liquid drops.
As shown in fig. 2 and fig. 5a, 5b and 5c, the super-hydrophilic channel structure has flexible connection direction of adjacent structures, and the connection direction of the channel can be designed arbitrarily to control the liquid drop transportation direction.
The taper of the triangular structure is 3-15 degrees, the length is 5-30 mm, the smaller the taper is, the longer the length can be designed; conversely, the larger the taper, the shorter the length should be designed; the appropriate geometry is selected based on the size of the droplets.
The isosceles trapezoid structure is obtained by cutting off the upper half part of the triangle structure, so that the continuity of liquid drop transportation is ensured.
As shown in fig. 1 and 6, the principle of the structure of the surface channel for droplet directional control is that a droplet moves only in the superhydrophobic channel structure due to the wettability gradient generated by superhydrophobicity and superhydrophobicity on the superhydrophobic surface on which the superhydrophilic channel structure is distributed, the droplet in the superhydrophilic channel has curvature difference due to the upper and lower asymmetrical structures of a triangle, and laplace pressure difference is generated due to the tension action of the surface of the droplet, so that the droplet is driven to be transported to the bottom from the tip of the triangle structure, the transport state of the droplet in the isosceles trapezoid is the same as that of the triangle, and the droplet is transported to the bottom from the narrow end of the structure.
Surface structure not only can high efficiency transport liquid drop, but also can the multi-angle change structure, form the transport passageway of equidirectional not, and the connection in proper order of a plurality of isosceles trapezoid structure, can make the liquid drop can not lose drive power in remote passageway, control technical field for the droplet and provide a liquid drop drive surface structure that can not have energy consumption, this surface structure has powerful directional transportation ability simultaneously, designs the droplet passageway of different directionalities as required.
The invention relates to a preparation method of a surface channel structure for droplet directional control, which comprises the following steps:
1) as shown in fig. 3a and fig. 3b, a computer controls a pulse laser to ablate a micrometer cone and a micrometer pit structure which are periodically distributed on the surface of a material by a cross scanning mode, the micrometer cone and the micrometer pit are alternately and densely distributed, and a nano particle structure is distributed on a peak-pit micrometer structure to form a double-scale micro-nano structure surface;
2) as shown in fig. 4a, the surface treated by the pulse laser is modified by a low surface energy substance to obtain a super-hydrophobic surface, and the contact angle is larger than 150 degrees;
3) drawing super-hydrophilic channel structure by using computer CAD drawing software
4) And scanning the super-hydrophilic channel structure again on the super-hydrophobic surface by using pulse laser, removing the low-surface-energy substance modification layer on the surface of the material, converting the super-hydrophobic property of the area where the pattern is treated by the laser into the super-hydrophilic property, wherein the contact angle is close to 0 degrees, and the untreated area still shows the super-hydrophobic property, thus obtaining the self-driven water collection pattern with the super-hydrophobic-super-hydrophilic mixed structure, wherein the micro-peak-micro-pit structure is converted into a parallel micro-groove, and the nano particles are converted into a nano fluff structure.
In the step 1) and the step 4), the pulse laser is nanosecond laser, picosecond laser or femtosecond laser; the material is a metal or laser processable composite material.
Step 1), the pulse laser is femtosecond laser, the laser power is 10W, the wavelength is 1030nm, the pulse width is 450fs, the pulse frequency is 1MHz, the scanning speed is 80-150 mm/s, and the scanning interval is 0.03-0.05 mm.
And 4), the pulse laser is infrared nanosecond laser, the laser power is 10W, the wavelength is 1064nm, the pulse width is 20ns, the pulse frequency is 20KHz, the scanning speed is 150-500 mm/s, and the scanning interval is 0.05-0.1 mm.
And 4) modifying the low-surface-energy substance by adopting a liquid phase modification method, firstly preparing a stearic acid solution of absolute ethyl alcohol with the mass concentration of 0.01-0.05 mol/L, soaking the surface of the material subjected to laser treatment in the solution for 0.5-1 hour at normal temperature, and then obliquely and naturally airing the material for about 10 minutes in a dry natural environment.
As shown in fig. 3a and 3c, step 4), the pulse laser is used to scan the super-hydrophilic channel structure again, firstly, the pulse laser scans the triangular, isosceles trapezoid and bottom circular outlines on the super-hydrophobic surface in sequence, then the filling lines in the outlines are scanned in the set scanning interval and the filling direction of the lines in the outlines, the preparation of the micro-grooves in the outlines is completed, the liquid drops show the super-hydrophilic characteristic on the inner surface of the outlines, the scanning mode is different from the cross scanning mode of the super-hydrophobic surface, and the super-hydrophilic surface adopts a one-way scanning to obtain the micro-groove structure beneficial to flow guiding.
In the steps 1) and 4), the material is a metal or laser-processable composite material, specifically, 6061 aluminum alloy can be adopted, the surface of the material is ultrasonically cleaned in absolute ethyl alcohol for 10 minutes before and after laser treatment, and surface stains and residues left after processing are removed.
Preparing a super-hydrophobic surface and a super-hydrophilic channel structure by respectively adopting infrared femtosecond laser and infrared nanosecond laser, wherein the difference is that, as shown in fig. 4a and 4b, on one hand, the nanosecond laser is used for the second time for processing, so that stearic acid which is a low-surface-energy substance is removed by utilizing the high heat property of the nanosecond laser, the super-hydrophobic property is converted into the super-hydrophilic property, the non-ablated area of the nanosecond laser still keeps the super-hydrophobic property, and then the super-hydrophobic-super-hydrophilic mixed area is arranged on the surface; as shown in fig. 3a, fig. 3c, fig. 3d, and fig. 6, on the other hand, the super-hydrophobic surface adopts a cross scanning manner to process a micro-peak-micro-pit periodic structure, while the super-hydrophilic surface adopts a unidirectional scanning manner to process a micro-groove structure beneficial to flow guiding, and the structure has strong self-driving force and a function of directionally controlling droplets.
In the invention, a first triangular structure and a plurality of isosceles trapezoid structures are sequentially connected to form a super-hydrophilic channel structure for droplet control, when liquid droplets exist on the triangle, the curvatures of the surfaces of the liquid drops are asymmetrically distributed along the direction of the main axis of the channel, the curvature at the wider end of the triangle is smaller, the curvature at the narrower end of the triangle is larger, and due to the difference of the curvatures at the two ends of the liquid drops, the Laplace force caused by the curvature in the liquid drop is different, the Laplace difference can push the liquid drop to one wider end of the triangle to realize the self-driven transportation of the liquid drop, the motion mode of the liquid drop on the isosceles trapezoid is consistent with the triangle structure, the difference is that the curvature difference of the triangle structure is larger than that of the isosceles trapezoid structure, therefore, when the liquid drops are transported from the triangular structure, the liquid drops can obtain larger acceleration, so that the liquid drops can be rapidly transported;
the droplet control device adopts the idea that a triangular structure and an isosceles trapezoid structure are sequentially connected to form a super-hydrophilic channel structure to carry out droplet control, and adjacent structures can be connected in any direction, so that the design diversity and flexibility of a droplet transport channel are increased, high-strength self-driving and directional droplet control are realized, and the channel can overcome gravity to carry out transport by continuous driving force;
because the liquid drops on the surface of the invention pass through the transportation channels connected in multiple sections, the liquid drops can obtain driving force on the surface of each channel structure, so that the driving force cannot be lost due to long-distance transportation, the problems of transportation efficiency reduction, transportation process interruption and the like caused by the blockage and the blockage of the liquid drops on the surface are avoided, and the surface can be ensured to be continuously transported;
the pulse laser ablation process is simple and reliable, good in controllability, high in precision and efficiency and very suitable for industrial production process.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and shall be covered by the scope of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. A surface channel structure for droplet orientation manipulation, characterized by: the surface channel structure is a super-hydrophilic channel structure distributed on a super-hydrophobic surface, and the super-hydrophilic channel structure is formed by sequentially connecting a triangular structure and a plurality of isosceles trapezoid structures.
2. A surface channel structure for droplet orientation manipulation according to claim 1, wherein: the initial position of the super-hydrophilic channel structure is a triangular structure tip, the bottom of the super-hydrophilic channel structure is connected with the narrow ends of the isosceles trapezoid structures, the connection mode of the adjacent structures is that the narrow end of the next isosceles trapezoid is connected with the bottom of the previous isosceles trapezoid structure, and the bottom of the last isosceles trapezoid is provided with a circular water storage area connected with the bottom of the last isosceles trapezoid structure as the final arrival position of liquid drops.
3. A surface channel structure for droplet orientation manipulation according to claim 1 or 2, wherein: the taper of the triangular structure is 3-15 degrees, and the length is 5-30 mm.
4. A surface channel structure for droplet orientation manipulation according to claim 1, wherein: the isosceles trapezoid structure is obtained by cutting off the upper half part of the triangle structure.
5. A method of preparing a surface channel structure for droplet orientation manipulation according to claim 1, wherein: the method comprises the following steps:
1) controlling pulse laser to ablate a micron cone and a micron pit structure which are periodically distributed on the surface of the material by a cross scanning mode, wherein the micron cone and the micron pit are alternately and densely distributed, and a nano particle structure is distributed on the peak-pit micron structure to form a double-scale micro-nano structure surface;
2) modifying the surface treated by the pulse laser with a low surface energy substance to obtain a super-hydrophobic surface, wherein the contact angle is larger than 150 degrees;
3) drawing super-hydrophilic channel structure by using computer CAD drawing software
4) And scanning the super-hydrophilic channel structure again on the super-hydrophobic surface by using pulse laser, removing the low-surface-energy substance modification layer on the surface of the material, converting the super-hydrophobic property of the region where the pattern is treated by the laser into the super-hydrophilic property, and still expressing the untreated region as the super-hydrophobic property to obtain the self-driven water collection pattern with the super-hydrophobic-super-hydrophilic mixed structure, wherein the micro-peak-micro-pit structure is converted into parallel micro-grooves, and the nano particles are converted into a nano fluff structure.
6. The method of claim 5, wherein the surface channel structure is selected from the group consisting of: in the step 1) and the step 4), the pulse laser is nanosecond laser, picosecond laser or femtosecond laser; the material is a metal or laser processable composite material.
7. The method of claim 5, wherein the surface channel structure is selected from the group consisting of: step 1), the pulse laser is femtosecond laser, the laser power is 10W, the wavelength is 1030nm, the pulse width is 450fs, the pulse frequency is 1MHz, the scanning speed is 80-150 mm/s, and the scanning interval is 0.03-0.05 mm.
8. The method of claim 5, wherein the surface channel structure is selected from the group consisting of: and 4), the pulse laser is infrared nanosecond laser, the laser power is 10W, the wavelength is 1064nm, the pulse width is 20ns, the pulse frequency is 20KHz, the scanning speed is 150-500 mm/s, and the scanning interval is 0.05-0.1 mm.
9. The method of claim 5, wherein the surface channel structure is selected from the group consisting of: and 4) modifying the low-surface-energy substance by adopting a liquid phase modification method, firstly preparing a stearic acid solution of absolute ethyl alcohol with the mass concentration of 0.01-0.05 mol/L, soaking the surface of the material subjected to laser treatment in the solution for 0.5-1 hour at normal temperature, and then obliquely and naturally airing in a dry natural environment.
10. The method of claim 5, wherein the surface channel structure is selected from the group consisting of: and 4) scanning the super-hydrophilic channel structure again by using pulse laser, firstly scanning triangular, isosceles trapezoid and bottom circular outlines on the super-hydrophobic surface by using the pulse laser in sequence, then scanning filling lines in the outlines in the set scanning interval and the filling direction of the lines in the outlines to finish the preparation of micro-grooves in the outlines, wherein liquid drops show super-hydrophilic characteristics on the inner surface of the outlines, the scanning mode is different from the cross scanning mode of the super-hydrophobic surface, and the super-hydrophilic surface adopts a micro-groove structure which is beneficial to flow guiding and is scanned in a single direction.
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| CN113579481A (en) * | 2021-07-30 | 2021-11-02 | 江苏大学 | Composite wetting cutter and preparation method thereof |
| CN117265528A (en) * | 2023-09-28 | 2023-12-22 | 广州番禺职业技术学院 | Wear-resistant super-wetting surface and preparation method thereof |
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| CN108816702A (en) * | 2018-06-28 | 2018-11-16 | 清华大学 | A kind of driving catchment surface and preparation method certainly with super thin-super hydrophilic structure |
| CN110374963A (en) * | 2019-07-01 | 2019-10-25 | 大连理工大学 | A kind of structure that achievable liquid is transported from driving over long distances |
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| CN113579481A (en) * | 2021-07-30 | 2021-11-02 | 江苏大学 | Composite wetting cutter and preparation method thereof |
| CN117265528A (en) * | 2023-09-28 | 2023-12-22 | 广州番禺职业技术学院 | Wear-resistant super-wetting surface and preparation method thereof |
| CN117265528B (en) * | 2023-09-28 | 2024-04-30 | 广州番禺职业技术学院 | Wear-resistant super-wetting surface and preparation method thereof |
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