Solid contact angle measuring device considering surface modification

Abstract

The utility model provides a solid contact angle measuring device considering surface modification, which comprises a tray, a drying assembly arranged above the tray, a clamping groove corresponding to the drying assembly arranged at the center position of the tray, a buckle connected in the clamping groove and a titration assembly, the titration assembly comprises a support rod, a sliding groove is formed in the support rod, and the sliding groove is connected with the drying assembly. A sliding block is slidably connected into the sliding groove, a burette is connected to the bottom end of the sliding block, and the sliding block is connected with a stroke assembly in a penetrating manner; one end of the contact angle measuring instrument is connected with a support, the contact angle measuring instrument is used for measuring a sample fixed above the tray, and when the sample is subjected to modification, drying and measurement integrated contact angle measurement, not only can the influence of different modification conditions on a contact angle be measured, but also the measurement accuracy is improved. And the influence of environment temperature and humidity change on the sample in step-by-step operation can be avoided, so that the measurement period of the contact angle is remarkably shortened, and the measurement efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of material surface performance testing technology, and in particular to a solid contact angle measuring device that takes into account surface modification. Background Technology

[0002] In the field of materials science, the surface properties of materials play a crucial role in the practical application of materials. As the interface that comes into direct contact with the external environment, the material surface is constantly affected by various complex factors. For example, in a humid environment, the surface of a metallic material is prone to corrosion, which leads to a decline in its mechanical properties; in a high-temperature environment, the material surface may be oxidized, changing its original physical and chemical properties; and in some friction-prone situations, the material surface will be worn down, affecting its service life.

[0003] To improve the surface properties of materials, altering the surface composition with chemical reagents has become a core technological approach. This method can endow material surfaces with various special properties, such as hydrophilicity or hydrophobicity. This is of great significance for the application of materials in fields such as waterproofing, stain resistance, and biomedicine. Materials with hydrophobic surfaces can be used to manufacture waterproof clothing, self-cleaning glass, and other products; while hydrophilic surfaces facilitate the good integration of biomaterials with biological tissues. In addition, surface modification can enhance the corrosion resistance of materials, extend their service life in harsh environments, and endow them with self-cleaning capabilities, reducing the adhesion of dust and dirt to their surfaces.

[0004] Wettability, as one of the key indicators for measuring the surface properties of materials, is usually characterized by the contact angle. The contact angle refers to the angle between the gas-liquid interface and the solid-liquid interface at the junction of the gas, liquid, and solid phases. It directly reflects the degree of wettability of the liquid on the solid surface. However, existing contact angle measurement methods have many drawbacks. The current measurement steps are relatively scattered. During the entire measurement process, the sample often needs to be transferred multiple times between different devices or environments. This not only greatly reduces the measurement efficiency and increases the time cost required for measurement, but also increases the chance of the sample being affected by external contaminants during each transfer, aggravating the degree of contamination of the sample. At the same time, since it is difficult to keep the ambient temperature and humidity constant in different measurement stages, such fluctuations will have a significant impact on the measurement accuracy.

[0005] In summary, existing contact angle measurement technologies have significant shortcomings in terms of efficiency and accuracy. There is an urgent need to design a contact angle measurement device that can integrate multiple steps such as sample modification, drying, and measurement to effectively solve the above problems, improve the efficiency and accuracy of contact angle measurement, and provide more reliable technical support for the research and optimization of material surface properties. Summary of the Invention

[0006] To overcome existing problems, this application provides a solid contact angle measuring device that considers surface modification. When measuring the contact angle of a sample by integrating modification, drying, and measurement, it can not only measure the influence of different modification conditions on the contact angle, but also avoid the influence of environmental temperature and humidity changes on the sample during step-by-step operations, thus significantly shortening the contact angle measurement cycle and improving measurement efficiency.

[0007] The technical solution adopted by the embodiments of this application to solve its technical problem is:

[0008] A solid contact angle measuring device considering surface modification, comprising:

[0009] The tray has a drying component on top and a slot corresponding to the drying component in the center of the tray. The slot is divided into three rectangular parts, and each rectangular part is connected to a buckle. The buckle can slide inside the slot and is moved and fixed by magnetic force to fix the sample to be tested. A hole is passed through one end of the buckle and is connected to a drain pipe to guide the liquid into the waste liquid tank.

[0010] The drying assembly includes a drying chamber connected to the tray. Two rows of fans are embedded in the top of the drying chamber. Heaters are connected to both sides inside the drying chamber. The bottom of the drying chamber is not closed, so that the drying chamber can be connected to the tray when it rotates by a rotating ring. A partition is provided inside the drying chamber to divide the space inside the tray. A groove is opened on the top of the drying chamber inside the two rows of fans. The groove allows the liquid to be titrated by the burette at the top to fall into the tray from inside the groove.

[0011] A titration assembly includes a support rod with a groove inside the support rod, a slider slidably connected inside the groove, a burette connected to the bottom end of the slider, and a stroke assembly connected through the slider.

[0012] In addition, a contact angle measuring instrument is provided, one end of which is connected to a bracket. The bracket has an L-shaped structure, and the end of the bracket away from the contact angle measuring instrument is installed on one end of the tray for measuring the sample fixed above the tray.

[0013] Preferably, the tray has a support frame at the end away from the bracket. The design of the support frame allows the various components to work together to form a complete contact angle measurement system. The support frame is located above the tray and is connected to a rotating ring that is connected to the drying component. The rotating ring is fixedly connected to the drying component and can rotate around the support frame to drive the drying component to rotate. The bottom end of the rotating ring is provided with a fixing ring for connecting to the lifting cylinder. The bottom end of the support frame is connected to a base plate.

[0014] The bottom of the tray is connected to a drain pipe at the position corresponding to the leak hole, and the bottom of the drain pipe is connected to a waste liquid tank.

[0015] Preferably, the stroke assembly includes a servo motor connected to the support rod, a lead screw connected to the output end of the servo motor, the lead screw being screwed to the slider, a baffle being provided at the other end of the lead screw, and the servo motor being connected to the control system. The operation of the servo motor can be controlled by the control system, thereby driving the burette to move on the upper surface of the support rod.

[0016] The support rod is provided with a collar at the connection with the support frame, the top of the support frame is provided with a stepper motor, the support frame is provided with a limiting groove at the intersection with the titration component, the limiting groove is provided with a threaded rod, the titration component is connected to the threaded rod inside the limiting groove, and the stepper motor drives the titration component to move up and down inside the limiting groove.

[0017] Preferably, the crossbar is provided with a distilled water container and three modified liquid containers at one end of the support frame, and the distilled water container, the three modified liquid containers and the crossbar are all detachable structures;

[0018] The distilled water container and the modified liquid container are both connected to a connecting pipe at their bottom ends. Each connecting pipe is equipped with a valve to control the flow of the solution inside the distilled water container and the modified liquid container. By having valves on the surface of the connecting pipes, the flow of liquid in different containers can be controlled by controlling the valves inside the different connecting pipes.

[0019] Preferably, the drying chamber is equipped with a push-pull plate at one end of the contact angle measuring instrument. The interior of the drying chamber has a through hole at the bottom of the heater, which is connected to the connecting pipes at the bottom of the distilled water container and the three modified liquid containers. The drying chamber has a rectangular hole at one end of the push-pull plate. During the drying process, the push-pull plate is in a closed state. When it is necessary to measure with the contact angle measuring instrument, the push-pull plate and the partition are opened, allowing the contact angle measuring instrument to take pictures of the sample inside through the rectangular hole.

[0020] The advantages of the embodiments of this application are:

[0021] 1. When performing contact angle measurement on samples in an integrated manner that combines modification, drying, and determination, it can not only measure the influence of different modification conditions on the contact angle, but also avoid the influence of environmental temperature and humidity changes on the sample during step-by-step operations. This significantly shortens the contact angle measurement cycle, improves measurement efficiency, and reduces material loss.

[0022] 2. Sample processing and measurement are completed in a relatively stable environment. Temperature and humidity can be precisely controlled by other equipment such as drying components, avoiding interference from environmental factors on the sample surface condition. This greatly improves measurement accuracy and provides more reliable data support for the study of material surface properties.

[0023] 3. The unique design of the tray slot can accommodate multiple samples simultaneously and fix samples of different shapes and sizes with buckles. Whether it is regular block material or irregular film, fiber and other materials, they can be stably fixed. At the same time, the internal partitioning of the drying component and the connection with various liquid containers enable the simultaneous treatment of multiple samples under different modification conditions, which greatly enhances the versatility and flexibility of the device, meets diverse research needs, and can be widely used in the study of material surface properties in different fields. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Figure 1 This is a schematic diagram of the overall structure of the solid contact angle measuring device considering surface modification according to this utility model;

[0026] Figure 2 A schematic diagram of the overall structure connecting the support frame and the waste liquid tank in the solid contact angle measuring device considering surface modification according to this utility model;

[0027] Figure 3 This is a schematic diagram of the overall structure of the tray in the solid contact angle measuring device considering surface modification according to this utility model;

[0028] Figure 4 A schematic diagram of the overall structure of the solid contact angle measuring device for surface modification in this utility model, in which the drying component push-pull plate is in the closed state;

[0029] Figure 5 A schematic diagram of the overall structure of the solid contact angle measuring device for surface modification in this utility model, with the push-pull plate of the drying component in the open state;

[0030] Figure 6 This is a schematic diagram of the overall structure of the titration component in the solid contact angle measuring device considering surface modification, as described in this utility model.

[0031] Explanation of key figure labels:

[0032] 1. Support frame; 2. Drying assembly; 21. Drying oven; 22. Heater; 23. Fan; 24. Groove; 25. Sliding plate; 26. Partition; 27. Through hole; 3. Rotating ring; 4. Base plate; 5. Titration assembly; 51. Collar; 52. Slide groove; 53. Servo motor; 54. Support rod; 55. Slider; 56. Burette; 57. Lead screw; 58. Baffle; 6. Tray; 7. Bracket; 8. Connecting pipe; 9. Contact angle measuring instrument; 10. Waste liquid tank; 11. Drain pipe; 12. Distilled water container; 13. Modified liquid container; 14. Limiting groove; 15. Crossbar; 16. Slot; 17. Leakage hole; 18. Buckle; 19. Stepper motor; 20. Lifting cylinder; 28. Fixing ring. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. In addition, for the sake of convenience, the terms "upper," "lower," "left," and "right" are equivalent to the upper, lower, left, and right directions of the accompanying drawings themselves, and the terms "first," "second," etc., are used for descriptive purposes and have no other special meaning.

[0034] This application provides a solid contact angle measuring device that considers surface modification, solving the problems in the prior art. When measuring the contact angle of a sample by integrating modification, drying, and measurement, it can not only measure the influence of different modification conditions on the contact angle but also avoid the influence of environmental temperature and humidity changes on the sample during step-by-step operations. This significantly shortens the contact angle measurement cycle, improves measurement efficiency, and reduces material loss. Sample processing and measurement are completed in a relatively stable environment, with temperature and humidity precisely controlled by the drying component and other equipment, avoiding interference from environmental factors on the sample surface state and greatly improving measurement accuracy. This provides more reliable data support for material surface performance research. The unique tray slot design can accommodate multiple samples simultaneously and fix samples of different shapes and sizes with clips, whether regular block materials or irregular films, fibers, etc., all can be stably fixed. Furthermore, the internal partitioning of the drying component and its connection to various liquid containers allow for simultaneous processing of multiple samples under different modification conditions, greatly enhancing the versatility and flexibility of the device, meeting diverse research needs, and enabling its wide application in material surface performance research across different fields.

[0035] The technical solution in this application is to solve the above problems, and the overall approach is as follows:

[0036] Example

[0037] This embodiment provides a specific structure for a solid contact angle measuring device that considers surface modification, such as... Figure 1-6 As shown, it includes:

[0038] The tray 6 has a drying component 2 on top of it. A slot 16 corresponding to the drying component 2 is located in the center of the tray 6. The slot 16 is divided into three rectangular parts. Each rectangular part is connected to a buckle 18. The buckle 18 can slide inside the slot 16 to fix the sample to be tested. A hole 17 is passed through one end of the buckle 18. The hole 17 is connected to a drain pipe 11. The liquid is introduced into the waste liquid tank 10 through the drain pipe 11.

[0039] The drying assembly 2 includes a drying chamber 21 connected to the tray 6. Two rows of fans 23 are embedded in the top of the drying chamber 21. Heaters 22 are connected to both sides inside the drying chamber 21. The bottom of the drying chamber 21 is not closed, so that the drying chamber 21 can be connected to the tray 6 when it is rotated by the rotating ring 3. A partition 26 is provided inside the drying chamber 21 to divide the space inside the tray 6. A groove 24 is opened on the top of the drying chamber 21 inside the two rows of fans 23. With the setting of the groove 24, when the burette 56 at the top is titrating liquid, the liquid being titrated can fall from the groove 24 into the tray 6.

[0040] Titration assembly 5 includes a support rod 54, a groove 52 is provided inside the support rod 54, a slider 55 is slidably connected inside the groove 52, a burette 56 is connected to the bottom end of the slider 55, and a stroke component is connected through the slider 55.

[0041] In addition, there is a contact angle measuring instrument 9, one end of which is connected to a bracket 7. The bracket 7 has an L-shaped structure, and the end of the bracket 7 away from the contact angle measuring instrument 9 is installed on one end of the tray 6 for measuring the sample fixed on the tray 6.

[0042] A support frame 1 is provided at the end of the tray 6 away from the bracket 7. The design of the support frame 1 enables the various components to work together to form a complete contact angle measurement system. The support frame 1 is located above the tray 6 and is connected to a rotating ring 3 that is connected to the drying component 2. The rotating ring 3 is fixedly connected to the drying component 2 and can rotate around the support frame 1 to drive the drying component 2 to rotate. The bottom end of the rotating ring 3 is provided with a fixing ring 28 for connecting to the lifting cylinder 20. When the drying component 2 moves above the tray 6, the lifting cylinder 20 operates, driving the tray 6 to move upward and engage tightly with the drying component 2. The bottom end of the support frame 1 is connected to a base plate 4.

[0043] The bottom of the tray 6 is connected to a drain pipe 11 at the position corresponding to the drain hole 17, and the bottom of the drain pipe 11 is connected to a waste liquid tank 10.

[0044] The stroke assembly includes a servo motor 53 connected to the support rod 54. The output end of the servo motor 53 is connected to a lead screw 57, which is screwed to the slider 55. The other end of the lead screw 57 is provided with a baffle 58. The servo motor 53 is connected to the control system. The operation of the servo motor 53 can be controlled by the control system, thereby driving the burette 56 to move on the upper surface of the support rod 54.

[0045] Among them, a collar 51 is provided at the connection between the support rod 54 and the support frame 1, a stepper motor 19 is provided at the top of the support frame 1, and a limiting groove 14 is provided at the intersection of the support frame 1 and the titration component 5. Under the operation of the stepper motor 19, the titration component 5 is driven to move up and down inside the limiting groove 14.

[0046] The crossbar 15 is located at one end of the support frame 1 and is equipped with a distilled water container 12 and three modified liquid containers 13. The distilled water container 12, the three modified liquid containers 13 and the crossbar 15 are all detachable structures.

[0047] Both the distilled water container 12 and the modified liquid container 13 are connected to a connecting pipe 8 at their bottom ends. Each connecting pipe 8 is equipped with a valve to control the flow of the solution inside the distilled water container 12 and the modified liquid container 13. By providing valves on the surface of the connecting pipe 8, the flow of liquid in different containers can be controlled by controlling the valves inside different connecting pipes 8.

[0048] The drying oven 21 has a push-pull plate 25 at one end of the contact angle measuring instrument 9. Inside the drying oven 21, there is a through hole 27 at the bottom of the heater 22. The through hole 27 is connected to the connecting pipe 8 at the bottom of the distilled water container 12 and the three modified liquid containers 13. The drying oven 21 has a rectangular hole at one end of the push-pull plate 25. During the drying process, the push-pull plate 25 is in the closed state. When it is necessary to measure by the contact angle measuring instrument 9, the push-pull plate 25 and the partition 26 are opened, so that the contact angle measuring instrument 9 can take pictures of the sample inside through the rectangular hole.

[0049] When using the solid contact angle measuring device considering surface modification in this embodiment, the following steps are included:

[0050] Step 1: Secure the sample to be measured onto the clip 18 of tray 6;

[0051] Step 2: Rotate and move the drying component 2 so that it is aligned with and connected to the slot 16 of the tray 6, and then set the temperature of the drying component 2.

[0052] Step 3: Open the valve of the connecting pipe 8 at the bottom of the modified liquid container 13, connect the modified liquid container 13 to the drying component 2, and immerse the sample in the modified liquid until the set immersion volume is reached, then close the valve.

[0053] Step 4: After the sample reaches the modification time, open the drain pipe 11 to allow the modified liquid to flow into the waste liquid tank 10.

[0054] Step 5: Close the valve of the modified liquid container 13, open the valve of the bottom connecting pipe 8 of the distilled water container 12, connect the distilled water container 12 to the drying assembly 2, and rinse the test sample with distilled water. After rinsing, close the valve.

[0055] Step 6: Turn on the fan 23 of the drying assembly 2 and set the drying temperature through the heater 22 to dry the sample;

[0056] Step 7: After the sample is dried, turn on the contact angle measuring instrument 9, open the push-pull plate 25 and the partition 26 to allow the sample to be photographed by the high-speed camera;

[0057] Step 8: Move the buckle 18 of the sample to be tested within the range of the high-speed camera, and move the other buckles 18 out of the range. Use the control system to control the servo motor 53 to drive the burette 56 to move directly above the sample, ensuring that the liquid outlet of the titration needle and the sample surface are within the range of the high-speed camera. Under the movement of the stepper motor 19, the titration assembly 5 moves in the vertical direction.

[0058] Step 9: Adjust the titrant in the burette 56 to form a droplet about to fall at the titration needle. Move the burette 56 downwards until the droplet falls onto the sample surface and leaves, forming a certain angle on the sample surface.

[0059] Step 10: Use a contact angle measuring instrument 9 to capture the entire process of the titrant contacting the sample surface, generating hundreds of images. Select clear and stable images from these images and use software to measure and calculate the contact angle.

[0060] Step 11: Repeat the above steps to measure the surface contact angle of the next set of samples;

[0061] Step 12: Measure and record the contact angle of the sample surface after treatment with the modified liquid, and organize, analyze and summarize the measured contact angle data.

[0062] The contact angle was measured and calculated using the Young-Laplace equation for droplet shape analysis. The formula for calculating the contact angle θ is as follows:

[0063]

[0064] Wherein, γsv is the solid-gas interfacial tension, γs is the solid-liquid interfacial tension, and γlv is the liquid-gas interfacial tension, which are used to describe the contact angle of a droplet on a solid surface and reflect the tension balance relationship of the solid-liquid-gas three-phase interface.

[0065] The type, concentration, volume, and soaking time of the modified solution are set according to the experimental requirements. The relationship between the concentration C of the modified solution and the contact angle θ can be fitted using the following empirical formula:

[0066] θ=a*C+b

[0067] Where a and b are fitting parameters, and C is the concentration of the modified liquid. Through linear fitting, the influence of the concentration of the modified liquid on the contact angle can be obtained.

[0068] The relationship between drying temperature T and drying time t is optimized using the following formula:

[0069]

[0070] Where k is the drying rate constant and T0 is the ambient temperature, the drying temperature and time can be optimized to ensure that the sample is not affected by the external environment during the drying process.

[0071] The contact angle measuring instrument 9 captures the contact process of the droplet on the sample surface using a high-speed camera. The contact angle θ of the droplet is calculated using the following geometric formula:

[0072]

[0073] Where h is the droplet height and r is the radius of the droplet bottom. The contact angle can be directly calculated using the droplet height and bottom radius, which is suitable for droplets with relatively regular shapes.

[0074] By adopting the above technical solution:

[0075] When performing contact angle measurement on samples in an integrated manner that combines modification, drying, and measurement, it can not only measure the influence of different modification conditions on the contact angle, but also avoid the influence of environmental temperature and humidity changes on the sample during step-by-step operations. This significantly shortens the contact angle measurement cycle, improves measurement efficiency, and reduces material loss.

[0076] Working principle:

[0077] The sample to be measured is fixed on the buckle 18 of the tray 6. The drying component 2 is rotated and moved by the rotating ring 3 so that the drying component 2 is aligned with the slot 16 of the tray 6. Then, the lifting cylinder 20 moves and moves the tray 6 upward to align with the drying component 2. Then, the temperature of the drying component 2 is set, the valve of the bottom connecting pipe 8 of the modified liquid container 13 is opened, and the modified liquid container 13 is connected to the drying component 2 to soak the sample in the modified liquid. After the set soaking volume is reached, the valve is closed. After the sample has reached the modification time, the switch of the drain pipe 11 is opened to let the modified liquid flow into the waste liquid tank 10. The valve of the modified liquid container 13 is closed, the valve of the bottom connecting pipe 8 of the distilled water container 12 is opened, and the distilled water container 12 is connected to the drying component 2 to rinse the test sample with distilled water. After rinsing, the valve is closed, the fan 23 of the drying component 2 is turned on, and the drying temperature is set by the heater 22 to dry the sample. After the sample is dried, the contact angle measuring instrument 9 is turned on. At this time, the push-pull... Plate 25 and partition 26 are opened, allowing the sample to be photographed by a high-speed camera. The control system controls the servo motor 53 to move the burette 56 directly above the sample, ensuring that the outlet of the titration needle and the sample surface are within the range of the high-speed camera. Then, the stepper motor 19 moves the burette 56 vertically, adjusting the titrant in the burette 56 to form a droplet about to fall at the titration needle. The burette 56 moves downward until the droplet falls onto the sample surface and leaves, forming a certain angle on the sample surface. The entire process of the titrant contacting the sample surface is photographed using a contact angle measuring instrument 9, forming hundreds of images. Clear and stable images are selected, and the contact angle is measured and calculated using software. The above steps are repeated to measure the contact angle of the next set of sample surfaces. The contact angle of the sample surface after modification is measured and recorded. The measured contact angle data are then organized, analyzed, and summarized.

[0078] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A solid contact angle measuring device considering surface modification, characterized in that, include: A tray (6) is provided with a drying component (2) on top of the tray (6). A lifting cylinder (20) is provided at the bottom of the tray (6). A slot (16) corresponding to the drying component (2) is provided in the center of the tray (6). The slot (16) is divided into three rectangular parts. Each rectangular part is connected to a buckle (18). The buckle (18) can slide inside the slot (16) to fix the sample to be tested. A drain hole (17) is provided at one end of the buckle (18) for connecting to a drain pipe (11). The drying assembly (2) includes a drying box (21) connected to the tray (6). The top of the drying box (21) is fitted with two rows of fans (23). Heaters (22) are connected to both sides inside the drying box (21). The bottom of the drying box (21) is not closed and is equipped with a partition (26). The top of the drying box (21) is provided with a groove (24) inside the two rows of fans (23). Titration assembly (5), the titration assembly (5) includes a support rod (54), the support rod (54) has a groove (52) inside, a slider (55) is slidably connected inside the groove (52), a burette (56) is connected to the bottom end of the slider (55), and a stroke assembly is connected through the slider (55); And, a contact angle measuring instrument (9), one end of which is connected to a bracket (7), the bracket (7) having an L-shaped structure, the end of the bracket (7) away from the contact angle measuring instrument (9) being installed at one end of the tray (6) for measuring the sample fixed above the tray (6).

2. The solid contact angle measuring device considering surface modification as described in claim 1, characterized in that, The tray (6) is provided with a support frame (1) at the end away from the bracket (7). The support frame (1) is located above the tray (6) and connected to a rotating ring (3) connected to the drying component (2). The rotating ring (3) is fixedly connected to the drying component (2). The rotating ring (3) can rotate around the support frame (1) to drive the drying component (2) to rotate. The bottom end of the rotating ring (3) is provided with a fixing ring (28) for connecting to the lifting cylinder (20). The bottom end of the support frame (1) is connected to a base plate (4). The bottom of the tray (6) is connected to a drain pipe (11) at the position corresponding to the drain hole (17), and the bottom of the drain pipe (11) is connected to a waste liquid tank (10).

3. The solid contact angle measuring device considering surface modification as described in claim 2, characterized in that, The stroke assembly includes a servo motor (53) connected to the support rod (54), and a lead screw (57) is connected to the output end of the servo motor (53). The lead screw (57) is screwed to the slider (55), and a baffle (58) is provided at the other end of the lead screw (57). Among them, the support rod (54) is provided with a collar (51) at the connection between the support rod (54) and the support frame (1), the top of the support frame (1) is provided with a stepper motor (19), and the support frame (1) and the titration component (5) are provided with a limiting groove (14). Under the operation of the stepper motor (19), the titration component (5) is driven to move up and down inside the limiting groove (14).

4. The solid contact angle measuring device considering surface modification as described in claim 3, characterized in that, One end of the support frame (1) is connected to a crossbar (15), and a distilled water container (12) and three modified liquid containers (13) are provided on the crossbar (15). The bottom ends of the distilled water container (12) and the modified liquid container (13) are connected to a connecting pipe (8), and the connecting pipe (8) is equipped with a valve to control the flow of the solution inside the distilled water container (12) and the modified liquid container (13).

5. The solid contact angle measuring device considering surface modification as described in claim 1, characterized in that, The drying box (21) is provided with a push-pull plate (25) at one end of the contact angle measuring instrument (9), and a through hole (27) is provided inside the drying box (21) at the bottom end of the heater (22).

Images