A sample stage for contact angle measurement

Abstract

The utility model provides a kind of sample stage for contact angle measurement, it includes base, the magnetic platform of being arranged in the upside of the base and the sample plate of being detachably connected with the magnetic platform, the sample plate includes the release layer and the magnetic attraction layer of laminated connection, the surface of the release layer forms the bonding plane of low surface energy, the surface of the magnetic attraction layer forms the adsorption plane parallel with the bonding plane, the upside of the magnetic platform forms the receiving plane, the magnetic attraction layer and the magnetic platform form magnetic attraction and make the adsorption plane and the receiving plane cooperate connection.The utility model's sample plate can be removed from the magnetic platform, make the flattening and fixed of paper more relaxed, can improve the efficiency and accuracy of contact angle measurement, the setting of magnetic attraction layer makes the dismounting of sample plate more quickly, the setting of release layer can avoid the residual influence of adhesive material subsequent other sample measurement.

Description

Technical Field

[0001] This utility model relates to the field of contact angle measurement technology, and specifically to a sample stage for contact angle measurement. Background Technology

[0002] The contact angle is an important indicator for evaluating the wettability of a liquid on a solid. There is a need for contact angle measurement in many industrial fields. For example, in the process of paper product processing, glue is inevitably used for bonding. By measuring the contact angle between the glue and the paper, the bonding performance of the glue can be evaluated.

[0003] When measuring contact angle, the camera, the sample being tested, the test platform, and the light source must be on the same plane with no obstructions on the horizontal plane. Therefore, it is necessary to ensure that the contact surface of the sample remains flat during the measurement process; otherwise, the experimental results will be affected. However, some papers have low basis weight and thinness, and curl after printing, requiring additional anti-curling treatment. Patent application CN202222344119.3 discloses a sample clamp for a contact angle measuring instrument, which includes an optical axis and two symmetrically arranged clamping bodies. One end of the optical axis is fixedly connected to one clamping body, and the other end is slidably connected to the other clamping body. Each clamping body has a pressure plate connected to its top by adjusting bolts, and a gap is formed between the pressure plate and the clamping body. The above-mentioned technical solution uses a pressure plate and clamps to hold and fix the edges of the paper, preventing the edges from curling. By moving the two clamps, the paper is kept in a taut state and kept flat. However, when fixing paper with a high degree of curl, this technical solution has two problems. First, the operating space of the test platform of the contact angle measuring instrument is relatively limited, making the clamping operation more complicated. Second, the clamping angles on both sides of the paper are often inconsistent, resulting in the paper having a non-flat structure under tension. Therefore, it still cannot efficiently fix and flatten the paper. Summary of the Invention

[0004] To address the aforementioned issues, this invention provides a sample stage for contact angle measurement. This sample stage can conveniently fix thin samples such as paper that are prone to curling, keeping the sample flat and stable during the test and ensuring the validity of the measurement results.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A sample stage for contact angle measurement includes a base, a magnetic platform disposed on the upper side of the base, and a sample carrier plate detachably connected to the magnetic platform. The sample carrier plate includes a release layer and a magnetic layer stacked together. The surface of the release layer forms a low surface energy adhesive plane, and the surface of the magnetic layer forms an adsorption plane parallel to the adhesive plane. The upper side of the magnetic platform forms a receiving plane. The magnetic layer and the magnetic platform form a magnetic attraction, causing the adsorption plane and the receiving plane to engage and connect.

[0006] In the process of anti-curling, in addition to using clamps to hold and fix the edges of the paper, tape is often used. In some cases, when measuring the contact angle of paper, tape is used to stick and fix the edges of the paper to the sample stage of the contact angle measuring instrument. Although this method is relatively intuitive, it has many shortcomings: First, since the contact angle measuring instrument has multiple structural units such as cameras, light sources, and liquid injection mechanisms around the sample stage, the operating space is limited when directly pasting the paper on the sample stage. Moreover, the sample stage is a suspended structure with a limited area, and the paper needs to be flattened on the sample stage before pasting. It is not easy to paste the paper flat on the sample stage. Second, after the measurement is completed, the process of removing the tape is relatively troublesome, and adhesive material may remain on the sample stage, affecting the cleanliness of the sample stage. Finally, the tape covering the surface of the paper may affect the accuracy of the measurement results.

[0007] Based on the above reasons, this utility model provides a sample stage for fixing paper with double-sided tape. The sample stage has a magnetic platform and a sample plate. The magnetic layer of the sample plate and the magnetic platform are detachably connected by magnetic attraction. The sample plate can be removed from the magnetic platform, and the paper can be pasted and fixed in a relatively easy-to-operate space. Specifically, double-sided tape is attached to the release layer of the sample plate, and then the paper is flattened on the double-sided tape to keep the paper flat. More specifically, a roller can be used to flatten the paper on the double-sided tape to achieve higher flatness. The release layer of the sample plate is made of a material with low surface energy, such as fluoropolymers or silicone materials, so that the double-sided tape can be completely peeled off from the release layer, which is convenient for sample replacement. However, the adhesive strength of the double-sided tape and the stress generated by the curling of the paper should also be considered to ensure sufficient adhesive strength between the double-sided tape and the release layer and to avoid the double-sided tape delamination during the test. Those skilled in the art can select suitable release layer and double-sided tape materials from existing materials according to actual needs to achieve the specific parameters required for the implementation of this utility model. Furthermore, this invention can prepare multiple sample plates simultaneously. While the first sample plate is in the process of automated operation such as shooting and calculation, the sample is attached to the second sample plate, which helps to improve time utilization and has high efficiency when measuring multiple samples.

[0008] Furthermore, the magnetic suction platform is provided with a limiting protrusion that protrudes relative to the receiving plane.

[0009] Furthermore, the magnetic suction platform is provided with a retrieval groove that is recessed relative to the receiving plane.

[0010] Furthermore, a rounded transition is formed between the fitting inclined surface and the groove.

[0011] Furthermore, a partial surface of the release layer is covered with an indicator layer.

[0012] Furthermore, the sample stage also includes a first movable seat, which includes a first lead screw and a first movable block threadedly engaged with the first lead screw, and the base is connected to the first movable block.

[0013] Furthermore, the sample stage also includes a second movable seat, which includes a second lead screw perpendicular to the first lead screw and a second movable block threadedly engaged with the second lead screw. The first movable seat is connected to the second movable block.

[0014] Furthermore, the base and the magnetic platform are connected by a rotating mechanism, which has a rotation axis perpendicular to the receiving plane.

[0015] The following beneficial effects can be achieved by applying this utility model: 1. The sample carrier plate of this utility model can be removed from the magnetic platform, allowing for easy paper pasting and fixing in a more convenient space, making paper flattening and fixing easier and improving the efficiency and accuracy of contact angle measurement.

[0016] 2. The sample carrier plate of this utility model is detachably connected to the magnetic platform through the magnetic layer, making the assembly and disassembly of the sample carrier plate quicker and ensuring the efficiency of contact angle measurement.

[0017] 3. The sample carrier plate of this utility model has a release layer. The release layer allows the double-sided adhesive to be completely peeled off from the sample carrier plate, avoiding the residual adhesive material from affecting the measurement of other samples in the future.

[0018] 4. In some embodiments of this utility model, multiple sample carrier plates can be prepared. While the first sample carrier plate is in the process of automated operation such as shooting and calculation, the sample is attached to the second sample carrier plate, which helps to improve time utilization and has high efficiency when measuring multiple samples.

[0019] 5. In some embodiments of this utility model, the magnetic platform is provided with a limiting block to facilitate the rapid positioning of the sample plate. In other embodiments, the magnetic platform is provided with a retrieval groove, through which the sample plate can be lifted without sliding the sample plate to the edge of the magnetic platform before removing it, thus avoiding wear between the magnetic platform and the magnetic layer. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model; Figure 2 This is a schematic diagram of the magnetic suction platform and sample carrier plate in the embodiment; Figure 3 This is a schematic diagram of the structure of the first movable seat in the embodiment; In the figure, 1-base, 2-magnetic platform, 21-receiving plane, 22-limiting protrusion, 23-picking slot, 3-sample plate, 31-release layer, 311-adhesive plane, 32-magnetic layer, 321-magnetic plane, 33-indicator layer, 4-first movable seat, 41-first lead screw, 411-control knob, 42-first movable block, 421-installation platform, 43-first guide rod, 5-second movable seat, 6-rotation mechanism. Detailed Implementation

[0021] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention. Example

[0022] Reference Figure 1-2One embodiment of this utility model provides a sample stage for contact angle measurement, which includes a base 1, a magnetic platform 2 fixedly connected to the upper end of the base 1, and a sample carrier plate 3 detachably connected to the magnetic platform 2. The sample carrier plate 3 includes a release layer 31 and a magnetic layer 32 stacked together. The release layer 31 is made of a fluoropolymer material, organosilicon material, or other material with low surface energy, or has a thin film formed by a fluoropolymer material, organosilicon material, etc. on its surface. The double-sided adhesive attached to the release layer is easy to peel off and will not leave adhesive residue on the surface of the release layer. The magnetic layer 32 is made of a permanent magnet material that generates its own magnetic field or a soft magnetic material that can react to a magnetic field. The magnetic platform 2 is formed of a material or device that can form a magnetic attraction force with the magnetic platform. For example, in the first embodiment, the magnetic platform is a permanent magnet material and the magnetic platform is a soft magnetic material. The magnetic platform reacts to the magnetic field generated by the magnetic platform, so that a magnetic force is generated between the magnetic platform and the magnetic platform. In another example, in the second embodiment, the magnetic platform is a soft magnetic material and the magnetic platform is a magnetic layer. The platform is made of permanent magnet material. The magnetic layer reacts to the magnetic field generated by the magnetic platform, creating a magnetic force between the magnetic layer and the platform. Alternatively, the magnetic platform can be equipped with an electromagnetic attraction device instead of a permanent magnet. When energized, the electromagnetic device generates a magnetic field, creating a magnetic force between the magnetic layer and the platform. The release layer 31 and the magnetic layer 32 are integrally bonded and fixed together using an adhesive material with high affinity to the release layer. When the release layer is made entirely of fluoropolymer materials, silicone materials, etc., it is necessary to use... A special type of adhesive with high affinity to the release layer is used for bonding. If necessary, the inner surface of the release layer can be modified to improve the bonding strength, or multiple layers of adhesives with different properties can be used for composite bonding. A receiving plane 21 is formed on the upper side of the magnetic platform 2. The surfaces of the release layer 31 and the magnetic layer 32 respectively form an adhesive plane 311 and a magnetic plane 321. In the working state, the magnetic plane 321 is bonded to the receiving plane 21. Double-sided adhesive and the test paper are attached to the adhesive plane 311. A partial surface of the release layer 31 can be covered with an indicator layer 33. The indicator layer indicates the bonding point of the sample, facilitating the alignment of the sample with the liquid injection mechanism during contact angle measurement, ensuring accurate liquid dripping onto the central area of ​​the sample.

[0023] In some implementations, refer to Figure 2The magnetic platform 2 has a limiting protrusion 22 on its edge that protrudes relative to the receiving plane 21. When the sample plate 3 is placed on the receiving plane 21, the edge of the sample plate 3 is restricted by the limiting protrusion 22 and cannot slide freely, or the sliding space is small, so that the sample can be aligned with the light source and camera position of the contact angle measuring instrument. The protrusion height of the limiting protrusion should not exceed the thickness of the sample plate to avoid affecting the shooting. In a further embodiment, the receiving plane of the magnetic platform is an approximately rectangular structure. The three sides of the receiving platform are provided with limiting protrusions 22, and the remaining side edge is provided with a retrieval groove 23 that is recessed relative to the receiving plane 21. The sample plate can be lifted up through the retrieval groove 23 and removed without sliding the sample plate to the outside of the magnetic platform, which can reduce the frictional loss between the magnetic layer and the magnetic platform.

[0024] In some implementations, refer to Figure 3 The lower side of the base 1 is provided with a first movable seat 4 and a second movable seat 5. Taking the first movable seat 4 as an example, the first movable seat 4 includes a first lead screw 41, a first movable block 42 and a first guide rod 43. The first movable block has a first screw hole that is screwed into the first lead screw 41 and a guide hole that is slidably engaged with the first guide rod 43. The upper side of the first movable block 42 is provided with an installation platform 421 for connecting the base 1. One end of the first lead screw 41 is connected to a control knob 411. By manually rotating the control knob, the first movable block 42 can be controlled to move along the first lead screw 41, thereby changing the position of the base 1. Similarly, the second movable seat 5 includes a second lead screw, a second movable block and a second guide rod. The specific assembly method of the second movable seat is the same as that of the first movable seat. The upper side of the second movable block is detachably connected to the first movable seat 4. The installation direction of the second lead screw is perpendicular to the first lead screw 41.

[0025] In some implementations, refer to Figure 1 The base 1 and the magnetic platform 2 are connected by a rotating mechanism 6. The rotating mechanism includes a rotating shaft connected to the base and a turntable connected to the rotating shaft, which are perpendicular to the receiving plane 21. The magnetic platform 2 and the turntable are detachably connected. The turntable can rotate relative to the base. In a first feasible embodiment, the rotating shaft is fixedly connected to the base and the turntable is rotatably connected to the rotating shaft. In a second feasible embodiment, the rotating shaft is rotatably connected to the base and the turntable is fixedly connected to the rotating shaft. In a third feasible embodiment, the rotating shaft is rotatably connected to the base and the turntable is rotatably connected to the rotating shaft.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sample stage for contact angle measurement, characterized in that: The sample carrier includes a base (1), a magnetic platform (2) disposed on the upper side of the base (1), and a sample carrier plate (3) detachably connected to the magnetic platform (2). The sample carrier plate (3) includes a release layer (31) and a magnetic layer (32) stacked together. The surface of the release layer forms a low surface energy bonding plane (311). The surface of the magnetic layer forms an adsorption plane (321) parallel to the bonding plane. The upper side of the magnetic platform forms a receiving plane (21). The magnetic layer and the magnetic platform form a magnetic attraction, so that the adsorption plane (321) and the receiving plane (21) are connected in a cooperative manner.

2. The sample stage for contact angle measurement according to claim 1, characterized in that: The magnetic platform (2) is provided with a limiting protrusion (22) that protrudes relative to the receiving plane (21).

3. A sample stage for contact angle measurement according to claim 2, characterized in that: The magnetic platform (2) is provided with a retrieval groove (23) that is recessed relative to the receiving plane (21).

4. A sample stage for contact angle measurement according to claim 3, characterized in that: The magnetic platform (2) has four sides connected in a rectangular structure. The limiting protrusions (22) are provided on three of the sides of the magnetic platform (2), and the retrieval groove (23) is provided on the fourth side of the magnetic platform (2).

5. A sample stage for contact angle measurement according to claim 2, characterized in that: The protrusion height of the limiting protrusion (22) does not exceed the thickness of the sample carrier plate (3).

6. A sample stage for contact angle measurement according to claim 1, characterized in that: The release layer (31) has a partial surface covered with an indicator layer (33).

7. A sample stage for contact angle measurement according to claim 1, characterized in that: It also includes a first movable seat (4), which includes a first lead screw (41) and a first movable block (42) threadedly engaged with the first lead screw, and the base (1) is connected to the first movable block.

8. A sample stage for contact angle measurement according to claim 7, characterized in that: It also includes a second movable seat, which includes a second lead screw that is perpendicular to the first lead screw and a second movable block that is threadedly engaged with the second lead screw. The first movable seat is connected to the second movable block.

9. A sample stage for contact angle measurement according to claim 1, characterized in that: The base (1) and the magnetic platform (2) are connected by a rotating mechanism (6), which has a rotation axis perpendicular to the receiving plane.

Images