阅读说明：本技术 实现多种超疏水表面微结构形貌的滚压装置及其应用方法 (Rolling device for realizing various super-hydrophobic surface microstructure appearances and application method thereof ) 是由 叶霞 徐胜 冯欢 陆磊 于 2020-10-30 设计创作，主要内容包括：本发明涉及实现多种超疏水表面微结构形貌的滚压装置及其应用方法,包括底座和驱动机构和压辊部件；压辊部件包括上压辊组和下压辊,上压辊组包括上压辊架与安装在上压辊架多个表面形貌不同的上压辊,多个上压辊与上压辊架可拆卸连接,的上压辊架活动安装在底座上,下压辊的两端安装在底座上；其中一个上压辊与下压辊平行并留有间隙,间隙用于放置待加工基材；上压辊的表面具有陈列排布的凸起形成表面形貌；底座上还设置有调辊距部件,调辊距部件与上压辊架连接,用于驱动上压辊架在底座上移动；驱动机构安装在底座上,用于驱动下压辊滚动。本发明的滚压装置通过压辊的滚压能够实现待加工表面微结构的建造,从而实现材料表面的超疏水性。(The invention relates to a rolling device for realizing various super-hydrophobic surface microstructure shapes and an application method thereof, and the rolling device comprises a base, a driving mechanism and a compression roller component; the press roll component comprises an upper press roll group and a lower press roll, the upper press roll group comprises an upper press roll frame and a plurality of upper press rolls which are arranged on the upper press roll frame and have different surface appearances, the plurality of upper press rolls are detachably connected with the upper press roll frame, the upper press roll frame is movably arranged on the base, and two ends of the lower press roll are arranged on the base; one of the upper press rolls is parallel to the lower press roll and is provided with a gap for placing a substrate to be processed; the surface of the upper press roll is provided with protrusions arranged in an array manner to form a surface appearance; the base is also provided with a roller spacing adjusting part, and the roller spacing adjusting part is connected with the upper compression roller frame and is used for driving the upper compression roller frame to move on the base; the driving mechanism is arranged on the base and used for driving the lower pressing roller to roll. The rolling device can realize the construction of the surface microstructure to be processed through the rolling of the pressing roller, thereby realizing the super-hydrophobicity of the material surface.)

1. The rolling device for realizing the multiple super-hydrophobic surface microstructure morphologies is characterized by comprising a base (1), a driving mechanism (2) and a pressing roller component (3);

the press roll component (3) comprises an upper press roll group (31) and a lower press roll (32), the upper press roll group (31) comprises an upper press roll frame (311) and a plurality of upper press rolls (312) which are arranged on the upper press roll frame (311) and have different surface appearances, the upper press rolls (312) are detachably connected with the upper press roll frame (311), the upper press roll frame (312) is movably arranged on the base (1), and two ends of the lower press roll (32) are arranged on the base (1); one of the upper press rolls (312) is parallel to the lower press roll (32) and is provided with a gap for placing a substrate to be processed; the surface of the upper pressing roller (312) is provided with an array of raised forming surface topography;

the base (1) is also provided with a roll spacing adjusting part (5), and the roll spacing adjusting part (5) is connected with the upper roll frame (311) and used for driving the upper roll frame (311) to move on the base (1); the driving mechanism (2) is arranged on the base (1) and is used for driving the lower pressing roller (32) to roll.

2. The rolling device for realizing multiple superhydrophobic surface microstructure morphologies according to claim 1, wherein the upper roller frame (311) is a cross-shaped frame, the upper roller frame (311) has a central roller (3111), and cross-shaped fixing frames (4) are arranged at two ends of the upper roller frame (311); the upper compression rollers (312) are positioned in the grooves of the upper compression roller frame (311) and are detachably connected with the frame rods (41) of the fixed frame (4) through the rolling shafts of the upper compression rollers (312); a sliding groove is formed in the base (1), the fixing frame (4) is arranged in the sliding groove in a sliding mode, and the central rolling shaft (3111) penetrates through the fixing frame (4) and is fixedly connected with the roll spacing adjusting component (5).

3. The rolling device for realizing various superhydrophobic surface microstructure morphologies according to claim 2, wherein the roll spacing adjusting member (5) comprises a supporting base (51), a cushion block (52), a stabilizing portion (53), a fixed end (54) and a hydraulic cylinder (55) in sequence from bottom to top; the cushion block (52) is fixedly arranged on the supporting seat (51), the piston (56) of the hydraulic cylinder (55) is fixedly connected with the cushion block (52), the fixed end (54) is fixedly arranged on the cylinder body of the hydraulic cylinder (55), the central rolling shaft (3111) is fixedly connected with the fixed end (54), the stabilizing part (53) is fixedly arranged on the base (1), and the piston (56) penetrates through the stabilizing part (53).

4. The rolling device for realizing multiple superhydrophobic surface microstructure morphologies of claim 3, wherein the number of the upper press rollers (312) is four.

5. The rolling device for realizing multiple superhydrophobic surface microstructure morphologies according to claim 3, wherein the end of the frame bar (41) has a mounting groove, the upper roller (312) is rotatably mounted in the mounting groove, and is detachably connected with the mounting groove through a locking member (42) and locks the upper roller (312) in the mounting groove.

6. The rolling device for realizing multiple super-hydrophobic surface microstructure morphologies according to any one of claims 1 to 5, wherein the driving mechanism (2) is a motor, and the motor is in transmission connection with the lower pressing roll (32) through a gear set (6).

7. The rolling device for realizing the multiple super-hydrophobic surface microstructure morphologies according to any one of claims 1 to 5, wherein the protrusions are one or more of semicircular protrusions, triangular protrusions, rectangular protrusions, trapezoidal protrusions and polygonal protrusions; the height of the protrusions is 0.1% -0.5% of the diameter of the upper press roll (312).

8. The application method of the rolling device according to any one of claims 1 to 7, characterized in that the rolling device prepares a microstructure shape on the surface of the substrate with hydrophobicity by protruding to obtain a superhydrophobic surface, and the contact angle of the superhydrophobic surface is more than 150 °; or preparing a microstructure shape on the surface of a hydrophilic substrate through a protrusion to obtain a hydrophobic surface, wherein the contact angle of the hydrophobic surface is more than 90 degrees, and chemically modifying the prepared hydrophobic surface to obtain the super-hydrophobic surface.

Technical Field

The invention relates to the technical field of super-hydrophobic surface manufacturing, in particular to a rolling device for realizing various super-hydrophobic surface microstructure morphologies and an application method thereof.

Background

The super-hydrophobic surface has the performances of self-cleaning, corrosion prevention, drag reduction, ice coating prevention, friction resistance and the like, can be applied to the industries of ships, aerospace, pipeline transportation and the like, and has good application prospect. For example, the self-cleaning windshield and rearview mirror can effectively avoid the influence of weather on the sight of a driver in rain, snow, fog and frosting environments, reduce blind areas and blurred sight, and improve driving safety. In the biological medicine industry, the super-hydrophobic material can prevent dirt and cell adsorption and has better biocompatibility. In kitchen and household, deposition of oil smoke and the like can be reduced by adopting a self-cleaning surface, and daily cleaning workload is reduced.

Research shows that the super-hydrophobic surface is composed of micro-nano-scale microstructures and extremely low surface free energy. To realize super-hydrophobicity, a low-surface-tension material is needed, and a specific micro-nano structure is processed on the surface. Studies have shown that smooth surfaces, even those covered with C, have the lowest energy of a known surface₂₀F₄₂(Perfluoroeicosane, surface energy only 6.7mJ/m²) Super-hydrophobicity cannot be realized, and the contact angle with water is not more than 120 degrees. Therefore, to realize super-hydrophobicity, the key is to process a specific micro-nano structure on the surface of the material.

At present, methods for preparing a superhydrophobic surface have been researched for decades, the preparation methods are highly diversified, the traditional superhydrophobic surface preparation methods mainly include a template method, a chemical vapor deposition method, a sol-gel method, a laser etching method, a chemical etching method and the like, the method is suitable for preparing small samples, time and labor are wasted, and most of the existing methods need expensive raw materials for preparation and modification or need special processing equipment, or the operation process is complex and is difficult to control during large-area preparation.

Disclosure of Invention

In order to solve the technical problems that the preparation process of the microstructure surface is complex and the surface with different microstructure appearances can not be prepared in a large area by the existing method, a rolling device for realizing the microstructure appearances of various super-hydrophobic surfaces and an application method thereof are provided. The device can realize the construction of the surface microstructure to be processed by rolling of the compression roller, thereby realizing the super-hydrophobicity of the material surface.

In order to achieve the purpose, the invention is realized by the following technical scheme:

the rolling device for realizing the micro-structural shapes of various super-hydrophobic surfaces is characterized by comprising a base, a driving mechanism and a pressing roller component;

the press roll component comprises an upper press roll group and a lower press roll, the upper press roll group comprises an upper press roll frame and a plurality of upper press rolls which are arranged on the upper press roll frame and have different surface appearances, the plurality of upper press rolls are detachably connected with the upper press roll frame, the upper press roll frame is movably arranged on the base, and two ends of the lower press roll are arranged on the base; one of the upper press rolls is parallel to the lower press roll and is provided with a gap for placing a substrate to be processed; the surface of the upper press roll is provided with protrusions arranged in an array manner to form a surface appearance;

the base is also provided with a roller spacing adjusting part, and the roller spacing adjusting part is connected with the upper compression roller frame and is used for driving the upper compression roller frame to move on the base; the driving mechanism is arranged on the base and used for driving the lower pressing roller to roll.

Furthermore, the upper compression roller frame is a cross-shaped frame, the upper compression roller frame is provided with a central rolling shaft, and cross-shaped fixing frames are arranged at two ends of the upper compression roller frame; the upper compression rollers are positioned in the grooves of the upper compression roller frame and are detachably connected with the frame rods of the fixed frame through the rolling shafts of the upper compression rollers; the base is provided with a sliding groove, the fixing frame is arranged in the sliding groove in a sliding mode, and the central rolling shaft penetrates through the fixing frame and is fixedly connected with the roller spacing adjusting component.

Furthermore, the roll spacing adjusting component sequentially comprises a supporting seat, a cushion block, a stabilizing part, a fixed end and a hydraulic cylinder from bottom to top; cushion fixed mounting is on the supporting seat, and the piston and the cushion fixed connection of pneumatic cylinder, fixed end fixed mounting are on the cylinder body of pneumatic cylinder, and central roller bearing and fixed end fixed connection, the stationary part is fixed to be set up on the base, and the piston passes the stationary part.

Still further, the number of the upper press rolls is four.

Still further, the tip of hack lever has the mounting groove, goes up the compression roller and rotates to install in the mounting groove, can dismantle with the mounting groove through the retaining member and be connected and with going up the compression roller locking in the mounting groove.

Further, the driving mechanism is a motor, and the motor is in transmission connection with the lower pressure roller through a gear set.

Furthermore, the bulges are one or more of semicircular bulges, triangular bulges, rectangular bulges, trapezoidal bulges and polygonal bulges; the height of the bulge is 0.1-0.5% of the diameter of the upper press roll.

The invention also provides an application method of the rolling device, the rolling device prepares a microstructure shape on the surface of the substrate with hydrophobicity through the protrusion to obtain a super-hydrophobic surface, and the contact angle of the super-hydrophobic surface is more than 150 degrees; or preparing a microstructure shape on the surface of a hydrophilic substrate through a protrusion to obtain a hydrophobic surface, wherein the contact angle of the hydrophobic surface is more than 90 degrees, and chemically modifying the prepared hydrophobic surface to obtain the super-hydrophobic surface.

The beneficial technical effects are as follows:

the rolling device comprises a lower pressing roller and a replaceable upper pressing roller with adjustable surface appearance, the distance between the upper pressing roller and the lower pressing roller can be adjusted through a hydraulic cylinder according to base materials with different thicknesses, the surface of the base material is rolled through different surface microstructure appearances of a plurality of upper pressing rollers, so that the construction of the microstructure appearance of the surface of the base material is realized, a low-surface free energy substance can be coated on the pressing rollers, and the low-surface free energy substance and the microstructure appearance are simultaneously transferred to the surface of the base material, so that the preparation of a large-area super-hydrophobic surface on the base material can be realized, the labor consumption is reduced, the equipment is simple, a complex preparation process is omitted, the preparation is carried out in a normal indoor environment, and the preparation speed is obviously.

Drawings

Fig. 1 is a schematic structural diagram of a rolling device for realizing various superhydrophobic surface microstructure morphologies in example 1.

FIG. 2 is a sectional view A-A of the rolling device for realizing various superhydrophobic surface microstructure morphologies of example 1.

The automatic roller spacing adjusting device comprises a base 1, a driving mechanism 2, a roller part 3, an upper roller group 31, an upper roller frame 311, a central roller 3111, an upper roller 312, a lower roller 32, a fixing frame 4, a frame rod 41, a locking part 42, a roller spacing adjusting part 5, a supporting seat 51, a cushion block 52, a stabilizing part 53, a fixed end 54, a hydraulic cylinder 55, a piston 56 and a gear group 6.

FIG. 3 is a convex shape of the upper roll surface of the rolling device for realizing various shapes of the superhydrophobic surface microstructures in example 1, wherein the convex shape of Model A is rectangular, the convex shape of Model B is semicircular, the convex shape of Model C is trapezoidal, and the convex shape of Model D is triangular.

Fig. 4 is a view showing the contact angle of the surface of a steel sheet obtained by subjecting a hydrophilic base steel sheet to rolling by a rolling device and then to chemical modification in application example 2 and application example 3, wherein a represents application example 2 and b represents application example 3.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention and the accompanying drawings, 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 following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Unless specifically stated otherwise, the numerical values set forth in these examples do not limit the scope of the invention. Techniques, methods known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

Example 1

The rolling device for realizing the multiple super-hydrophobic surface microstructure morphologies is shown in a schematic structural diagram of fig. 1, and comprises a base 1, and a driving mechanism 2 and a pressing roller component 3 which are sequentially arranged in the base 1 from bottom to top, wherein the driving mechanism 2 is connected with the inner wall of one side of the base 1, and the pressing roller component 3 is connected with the inner walls of two sides of the base 1;

the press roll component 3 comprises an upper press roll group 31 and a lower press roll 32, the upper press roll group 31 comprises an upper press roll frame 311 and four upper press rolls 312 which are arranged around the upper press roll frame 311 and have different surface morphologies, the plurality of upper press rolls 312 are detachably connected with the upper press roll frame 311, the upper press roll frame 312 is movably arranged on the base 1, and two ends of the lower press roll 32 are arranged on the base 1; one of the upper press rolls 312 is parallel to the lower press roll 32 with a gap for placing the substrate to be processed; the surface of the upper press roll 312 has an array of raised forming surface features;

the base 1 is also provided with a roller spacing adjusting component 5, and the roller spacing adjusting component 5 is connected with the upper roller frame 311 and used for driving the upper roller frame 311 to move on the base 1; the driving mechanism 2 is installed on the base 1 for driving the lower press roller 32 to roll.

As shown in the sectional view a-a of fig. 2, the upper roller frame 311 is a cross frame, the upper roller frame 311 has a central roller 3111, and two ends of the upper roller frame 311 are provided with cross fixing frames 4; the plurality of upper compression rollers 312 are positioned in the grooves of the upper compression roller frame 311 and detachably connected with the frame bars 41 of the fixed frame 4 through the rollers of the upper compression rollers 312; the base 1 is provided with a sliding groove, the fixing frame 4 is arranged in the sliding groove in a sliding mode, and the central roller 3111 penetrates through the fixing frame 4 and is fixedly connected with the roller spacing adjusting component 5.

The roll spacing adjusting component 5 comprises a supporting seat 51, a cushion block 52, a stabilizing part 53, a fixed end 54 and a hydraulic cylinder 55 from bottom to top in sequence; the cushion block 52 is fixedly installed on the supporting seat 51, the piston 56 of the hydraulic cylinder 55 is fixedly connected with the cushion block 52, the fixed end 54 is fixedly installed on the cylinder body of the hydraulic cylinder 55, the central roller 3111 is fixedly connected with the fixed end 54, the stabilizing part 53 is fixedly arranged on the base 1, and the piston 56 penetrates through the stabilizing part 53. The stabilizer 53 provided therein has a function of stabilizing the piston if the piston 56 is long.

Wherein, the end of the hack lever 41 is provided with a mounting groove, the upper compression roller 312 is rotatably mounted in the mounting groove, detachably connected with the mounting groove through the locking member 42 and locks the upper compression roller 312 in the mounting groove.

Wherein, the driving mechanism 2 is a motor, and the motor is in transmission connection with the lower pressure roller 32 through a gear set 6.

The Model of the protrusions on the upper press roll 312 is shown in fig. 3, the surface topography of the four upper press rolls 312 is respectively provided with rectangular protrusions of Model a (the rectangular protrusions are arranged at intervals, the interval width is 30 μm-80 μm), semicircular protrusions of Model B, trapezoidal protrusions of Model C, and triangular protrusions of Model D, wherein the triangular protrusions of Model D can be isosceles or equilateral triangles or right-angled triangles, the height of the protrusions is 0.1% -0.5%, preferably 0.3% of the diameter of the upper press roll 312, for example, the diameter of the upper press roll 312 is 5cm, and then the height of the protrusions is 150 μm; the microstructure appearance of the surface prepared on the hydrophilic surface by the convex shape has hydrophobicity (the contact angle is more than 90 degrees), and the arrangement sequence of the contact angles from large to small is measured by carrying out simulation on the hydrophobic surface: semicircular bulge, trapezoidal bulge, rectangular bulge and triangular bulge.

The working principle is as follows: the method comprises the steps of firstly selecting an upper compression roller 312 according to the microstructure morphology to be processed, then installing the required upper compression roller 312, enabling an upper compression roller frame 311 to move up and down on a piston 56 through the piston 56 of a roll distance adjusting component 5 according to the thickness of a base material to be processed, adjusting the gap distance between the whole upper compression roller set 31 and a lower compression roller 32 up and down, starting a driving mechanism 2, starting the device to run, driving the lower compression roller 32 through meshing of a gear set 6, enabling the upper compression roller 312 to rotate through the friction force between the base material to be processed and the upper compression roller 312, and finally processing the microstructure morphology corresponding to the convex surface morphology on the surface of the base material to be processed.

Application example 1

The rolling device application in example 1 was combined with the preparation of a superhydrophobic surface: the substrate to be processed adopted by the application example is a chip substrate PDMS material with a hydrophobic contact angle larger than 90 degrees, the diameter of an upper compression roller 312 with a semicircular bulge is 5cm, the height of the bulge is 150 micrometers), the upper compression roller 312 is installed to be vertically close to a lower compression roller 32, the gap distance between the upper compression roller 312 and the lower compression roller 32 is adjusted through a roller distance adjusting part 5 according to the thickness of the chip substrate PDMS material, a motor 2 is started, the device starts to operate, the lower compression roller 32 is meshed and driven through a gear set 6, the upper compression roller 312 is driven to operate, and finally, a microstructure morphology corresponding to the semicircular bulge is processed on the surface of the chip substrate PDMS material.

The contact angle test of the PDMS material of the chip substrate with the microstructure shape corresponding to the semicircular bulge prepared by the application example is carried out, the contact angle of the surface after rolling of the device reaches 163 +/-0.5 degrees, and the rolling angle is less than 10 degrees.

The rolling device is adopted to prepare the microstructure appearance on the surface of the substrate with certain hydrophobicity, so that the super-hydrophobic surface can be obtained.

Application example 2

The rolling device application in example 1 was combined with the preparation of a superhydrophobic surface: the substrate to be processed adopted by the application example is a steel sheet hydrophilic substrate), the diameter of an upper compression roller 312 with rectangular protrusions is 5cm, the height of the protrusions on the upper compression roller is 150 micrometers, the length of the protrusions is 30 micrometers, and the interval between the rectangular protrusions and the rectangular protrusions is 60 micrometers), the upper compression roller 312 is installed to be vertically close to a lower compression roller 32, then the gap distance between the upper compression roller 312 and the lower compression roller 32 is adjusted through a roller distance adjusting part 5 according to the thickness of the steel sheet, a motor 2 is started, the device starts to operate, the lower compression roller 32 is meshed and driven through a gear set 6 to drive the upper compression roller 312 to operate, and the microstructure appearance corresponding to the rectangular protrusions is processed on the surface of the steel sheet;

then, carrying out surface modification of hexadecyl trimethoxy silane on the steel sheet with the microstructure appearance corresponding to the rectangular bulge, wherein the surface modification method comprises the following steps: immersing the sample in hexadecyl trimethoxy silane solution at room temperature, wherein the hexadecyl trimethoxy silane solution is prepared by stirring hexadecyl trimethoxy silane, anhydrous ethanol and deionized water for 120min by a magnetic stirrer, soaking for 60min, drying at 120 ℃ for 150min, ultrasonically cleaning for 2min by ethanol, and drying at 120 ℃ for 20 min.

According to the application example, the steel sheet with the microstructure appearance prepared by the rolling device in the embodiment 1 of the invention and the surface modified is subjected to contact angle test, the structure is shown as figure 4-a, and the contact angle is 153 +/-0.5 degrees; the rolling angle test is carried out on the roller, and the rolling angle is less than 10 degrees.

The rolling device provided by the invention is adopted to prepare a microstructure shape on the surface of the hydrophilic substrate, and then the surface is modified to obtain the super-hydrophobic surface.

Application example 3

The present application example is the same as the method of application example 2, except that the rectangular protrusions on the upper press roll 312 are: the height of the bumps was 150 μm, the length of the bumps was 15 μm, and the interval between the rectangular bumps was 50 μm.

The steel sheet with the microstructure appearance prepared by the rolling device in the embodiment 1 of the invention and the surface modified is subjected to contact angle test, the structure is shown in figure 4-b, and the contact angle is 161 +/-0.5 degrees; the rolling angle test is carried out on the roller, and the rolling angle is less than 10 degrees.

The rolling device provided by the invention is adopted to prepare a microstructure shape on the surface of the hydrophilic substrate, and then the surface is modified to obtain the super-hydrophobic surface.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.