Assembleable micro-nano percolation device, design method and working method

Abstract

The present invention relates to the testing of the seepage performance of micro-nano materials to gas or liquid external experimental materials after combining with the mechanical field in the fields of materials engineering, mechanics and membrane engineering. Specifically, it is an assembleable micro-nano seepage device, design method and working method. The problem of modular installation is solved. The technical solution includes a slide, a force transmission block, a force bearing block, a front seepage conduit and a rear seepage conduit, and each part is made of the same soft material, and the overall length and width are greater than or equal to 20 mm and less than or equal to 100 mm. The beneficial effects of the present invention are: it can effectively avoid the problems that the current micro-nano material seepage experiments are difficult to combine with the mechanical properties of materials, have a narrow application range, and are inconvenient for observation.

Description

Technical Field

[0001] The present invention relates to the testing of the permeation performance of micro-nano materials to gas or liquid external experimental materials after combining mechanical fields in the fields of materials engineering, mechanics, and membrane engineering. Specifically, it relates to an assembleable micro-nano permeation device, design method, and operating method. Background Art

[0002] The permeation performance of micro-nano materials has attracted more and more attention in recent years. Permeation performance refers to the ability of a material to support external substances (liquids, gases, etc.) to pass through and enter the other side. In the fields of biology, chemistry, etc., the permeation behavior of materials at the micro-nano scale has important research significance, and promotes new explorations in the fields of sewage purification, gas separation, etc. For example, in the field of bioengineering, the ability of artificial cell membranes to exchange substances with the outside world is directly related to their permeation performance. Too low permeation performance will cause the artificial cells to quickly inactivate. Another nanomaterial called nanoporous graphene (NPG) has been used in seawater desalination research due to its outstanding physical properties. Its permeation performance directly affects the salt concentration reduction rate and working rate. Therefore, it is of great significance to study the permeation performance of advanced materials at the micro-nano scale.

[0003] The current experimental instruments for micro-nano material percolation have the following main shortcomings:

[0004] Difficult to integrate with mechanical experiments. Micro- and nanomaterials exhibit different seepage properties under coupled stress and seepage conditions, which can alter the results of permeation experiments. Currently, most micro- and nanomaterial permeation experiment instruments lack components capable of providing stress fields.

[0005] Poor air tightness. The entry of external gas into the instrument will affect the composition ratio of the gas after seepage and affect the seepage results.

[0006] Application number: CN2019105271661, a device and method for measuring the high-temperature gas permeability of micro-nano porous materials based on two-dimensional seepage effect, which states: "The present invention proposes a device and method for measuring the high-temperature gas permeability of micro-nano porous materials based on two-dimensional seepage effect. The micro-nano porous material to be tested is a disc-shaped material and is placed on the support of the connecting pipe between the upper and lower cavities. The experimental gas is provided by a gas cylinder and enters the heater through a pressure reducing valve, a first vacuum valve and a pressure regulating tank. After being heated to the experimental temperature, it enters a chamber with heat preservation and preheating functions. The upper chamber is evacuated to the initial experimental pressure using a vacuum pump. The constant-pressure, high-temperature gas in the upper chamber, driven by the pressure differential between the upper and lower chambers, seeps through the sample to be tested and into the lower chamber, causing the pressure and temperature in the lower chamber to gradually increase. Based on the percolation equations, this invention designed and constructed a test bench. Using experimental and simulation methods, it can more accurately measure the permeability of micro- and nanoporous materials. This method can be applied to the permeability measurement of various micro- and nanoporous materials at various gas temperatures. However, this method is not easily modularizable and cannot be integrated with external devices such as mechanical experimental equipment.

[0007] How to solve the above problems is the subject of the present invention. Summary of the Invention

[0008] Technical problem: In view of the shortcomings of the existing technology, an assemblable micro-nano seepage device, design method and working method are provided, which is suitable for micro-nano seepage experiments taking into account the deformation of nanomaterials, and has the advantages of good airtightness, stretchability (static load and dynamic load), assemblability and observability.

[0009] Technical solution: To achieve the above technical objectives, an assemblable micro-nano percolation device is provided, comprising a slide, a force transmission block, a force receiving block, a front percolation conduit, and a rear percolation conduit. Each part is made of the same soft material, and the overall length and width are both greater than or equal to 20 mm and less than or equal to 100 mm.

[0010] The slide is a rectangular block with a diamond-shaped hole in the center and a square top surface. Each side of the block is connected to the top surface of a force-transmitting block. The force-transmitting block has a small top surface and a large bottom surface, and the bottom surface is square. Its bottom surface is connected to the force-bearing block. The side of the force-bearing block has a rectangular through-hole. An external mechanical device can be hung through this through-hole to perform a stretching operation. The pre-seepage conduit is a tube with uniform thickness, with a large orifice at one end and a small orifice at the other end. The small orifice of the pre-seepage conduit is set in a trumpet shape and connected to the top of the slide. The large orifice of the pre-seepage conduit is connected to an external pre-seepage container. The post-seepage conduit is the same shape as the pre-seepage conduit. The small orifice of the post-seepage conduit is connected to the bottom of the slide, and the large orifice is connected to an external post-seepage container. The center of the slide is provided with a diamond-shaped hole. When the slide is subjected to tension, it causes stress concentration in the central area, resulting in greater strain than other areas. The slide is connected to a force-transmitting block on each of its four sides, and then to a force-bearing block on its outer side, forming a "cross" shape. The slide, force-transmitting block, and force-bearing block are integrally fabricated from a soft material to avoid misalignment and unevenness during connection, while also reducing the effects of stress concentration at the connection. The material has an elastic modulus greater than or equal to 1 MPa and less than or equal to 5 MPa, and an elongation at break greater than or equal to 500% and less than or equal to 1000%.

[0011] The slide can be subjected to two pairs of tensile forces, and the magnitudes of the two pairs of tensile forces can be changed independently, so that the magnitude and direction of the stress on the central hole can also change accordingly.

[0012] The hole on the side of the force-bearing block matches the size of the small-sized external stretching device hook, so the infiltration device can be loaded into the external stretching device, and the stretching device can be started to cause the micro-nano material to deform.

[0013] The side of the force transmission block is an arc tangent to the upper and lower planes of the slide. This arc design reduces the stress concentration at the connection between the side and the slide, so that the stress is better transmitted to the central area of ​​the slide.

[0014] The front seepage conduit and the rear seepage conduit are tubes of uniform thickness, and the small end is configured in a trumpet shape to increase the bonding area. The trumpet-shaped portion is bonded to the upper and lower sides of the slide by liquid glue to ensure the airtightness of the device.

[0015] A design method for an assembleable micro-nano percolation device comprises the following steps:

[0016] a1: First, according to the size of the micro-nano material to be measured, the diameter of the circular hole of the slide is d = l1 / 10, where l1 is the side length of the slide, and l1 should be larger than the diameter of the small end of the pre-seepage conduit and the post-seepage conduit.

[0017] a2: According to mechanical simulation, the maximum thickness of the load-bearing block is selected to be 5 times the thickness of the slide. At the same time, the stress in the hole area of ​​the slide is 5 times the stress on the load-bearing block. Then σ2=5σ1, where σ2 is the maximum stress on the micro-nano material and σ1 is the stress on the side of the load-transmitting block.

[0018] a3: Determine the elastic modulus E of the material of the force transmission block. According to Hooke's law, σ1 = Ex, where x is the displacement of the hook and the force transmission block.

[0019] a4: When the hook displacement x reaches the maximum displacement x max When the maximum stress on the micro-nano material is 5Ex max , should be greater than the stress required for the deformation of micro-nano materials.

[0020] A working method for assembling a micro-nano percolation device comprises the following steps:

[0021] b1: Place the sheet-like micro-nano material to be tested and its carrier net on the central hole of the specimen slide, and then fit the edge of the carrier net onto the specimen slide. The deformation of the edge of the carrier net should be consistent with that of the specimen slide.

[0022] b2: Hang the hook of the external stretching device on the micro-nano infiltration device through the hole, start the stretching device, and the load-bearing block, the force-transmitting block, and the slide will deform, generating stress concentration in the diamond hole area. The stress is greater than or equal to 3 times and less than or equal to 10 times the stress applied to the load-bearing block by the external stretching device. At the same time, deformation occurs, driving the micro-nano material to produce structural deformation;

[0023] b3: When the material is deformed, the external stretching device is kept at a constant tension. At this time, the micro-nano percolation device and the micro-nano material remain deformed and fixed. The external stretching device is placed in the scanning electron microscope chamber to observe the deformed morphology of the micro-nano material.

[0024] b4: When the material remains deformed, the pre-seepage conduit and the post-seepage conduit are installed on the upper and lower sides of the device to test the seepage performance of the micro-nano material. The seepage experimental material is injected through the pre-seepage conduit. After the substances are screened by the micro-nano material, they pass through the circular holes of the slide and the post-seepage conduit and enter the external collection container. Subsequently, other chemical analysis experiments are carried out to analyze the seepage performance of the micro-nano material sample by comparing the changes in the substances before and after the seepage.

[0025] In the step b2, after the stretching device is started, when the slide, the force transmission block, the force receiving block and the external stretching device work in combination, the tension is adjusted to deform the micro-nano infiltration device to a predetermined position, and then the stretching device hook and the force receiving block are fixed to keep the micro-nano material fixed and conduct an in-situ experiment. In this state, the entire device is placed in the scanning electron microscope chamber to observe the structure of the micro-nano material after deformation; after the observation is completed and it is taken out, the pre-infiltration conduit and the post-infiltration conduit are loaded onto the slide, and the fluid (liquid or gas) of the infiltration experiment is introduced to conduct a infiltration experiment on the deformed micro-nano material.

[0026] Beneficial effects:

[0027] 1. The micro-nano seepage device is small in size, has good airtightness and flexibility, and can be combined with an external stretching device to perform seepage experiments on micro-nano materials while applying a stress field. It can also be used in conjunction with a scanning electron microscope.

[0028] 2. Hook the hook of the external stretching device through the hole on the micro-nano infiltration device and start the stretching device. The load-bearing block, force-transmitting block, and slide will deform, generating stress concentration in the diamond-shaped hole area. This is 3 to 10 times the stress applied to the load-bearing block by the external stretching device. Simultaneously, a large deformation occurs, driving the micro-nano material to undergo structural deformation. Because the entire micro-nano infiltration device is made of the same material, it is easy to produce and has uniform quality, meeting the requirements of precision experiments. Because the sheet-like micro-nano material to be tested and its supporting mesh are placed above the central hole of the slide, rather than the nanomaterial being placed directly on the slide, the nanomaterial is prevented from being damaged by sudden localized excessive deformation.

[0029] 3. When the material is deformed, the external stretching device maintains a constant tension. At this time, the micro-nano infiltration device and the micro-nano material remain deformed and motionless. Because the length and width of the external stretching device and the micro-nano infiltration device assembly are less than 150 mm, it is sufficient to be placed in the scanning electron microscope chamber, making it easy to observe the morphology of the micro-nano material after deformation.

[0030] 4. When applying tension, due to the provision of two pairs of force-bearing blocks, the tension on the slide can be provided from two directions, the resultant force can change in size and direction, and the structure of the micro-nano material can also be changed in more ways.

[0031] 5. While the material remains deformed, install the pre-seepage and post-seepage conduits on the upper and lower sides of the device to test the seepage performance of the micro-nano material. At this point, the tested micro-nano material is in a constant deformation state, allowing for combined study of the material's mechanical and seepage properties.

[0032] 6. In the micro-nano percolation device, the design of the thicker force-bearing block, the curved side of the force-transmitting block, the thinner specimen slide, and the central hole of the specimen slide comprehensively considers the distribution of stress, so that the central hole of the specimen slide is deformed first, saving space and further reducing the overall size of the device;

[0033] 7. It has the advantages of good air tightness, stretchability (static load and dynamic load), assembly and observability, which can effectively avoid the problems of current micro-nano material seepage experiments that are difficult to combine with the mechanical properties of materials, have a narrow application range, and are inconvenient for observation. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Schematic diagram of the structure of the assembled micro-nano percolation device of the present invention after assembly, (a) is a schematic diagram of the three-dimensional structure of the assembled micro-nano percolation device after assembly, and (b) is a two-dimensional cross-sectional diagram of the assembled micro-nano percolation device after assembly;

[0035] Figure 2 It is a schematic diagram of the connection between a group of force-bearing blocks, a force-transmitting block and a slide in the assemblable micro-nano percolation device of the present invention;

[0036] Figure 3 It is a schematic structural diagram of the integrated force-bearing block, force-transmitting block, and specimen slide in the assemblable micro-nano percolation device of the present invention;

[0037] Figure 4 Figure 1 is a diagram showing the stress distribution of the assemblable micro-nano percolation device (excluding the conduit) of the present invention when subjected to tension. (a) is a diagram showing the overall stress distribution of the slide 1, force transmission block 2, and force receiving block 3. (b) is a diagram showing the local stress distribution of the slide 1 and force transmission block 2.

[0038] Figure 5 It is a structural schematic diagram of the front seepage conduit of the assembled micro-nano seepage device of the present invention, (a) is a three-dimensional structural schematic diagram of the front seepage conduit of the assembled micro-nano seepage device (the structure of the rear seepage conduit is the same as the front seepage conduit), and (b) is a side view of the front seepage conduit of the assembled micro-nano seepage device (the structure of the rear seepage conduit is the same as the front seepage conduit).

[0039] Among them, the accompanying drawings are marked as follows: 1- slide; 2- force transmission block; 3- force receiving block; 4- front seepage conduit; 5- rear seepage conduit. DETAILED DESCRIPTION

[0040] An embodiment of the present invention will be further described below with reference to the accompanying drawings:

[0041] like Figure 1-Figure 3As shown, an assemblable micro-nano percolation device includes a slide 1, a force transmission block 2, a force receiving block 3, a front percolation conduit 4, and a rear percolation conduit 5. Each part is made of the same soft material, and the overall length and width are both greater than or equal to 20 mm and less than or equal to 100 mm.

[0042] The slide 1 is a rectangular block with a diamond-shaped hole in the center and a square top surface. Each side of the block is connected to the top surface of a force-transmitting block 2. The force-transmitting block 2 has a small top surface and a large bottom surface, and the bottom surface is square. Its bottom surface is connected to the force-bearing block 3. The side of the force-bearing block 3 has a rectangular through-hole. An external mechanical device can be hung through this through-hole to perform a stretching operation. The pre-seepage conduit 4 is a tube with uniform thickness, with a large orifice at one end and a small orifice at the other end. The small orifice of the pre-seepage conduit 4 is configured in a trumpet shape and connected to the top of the slide 1. The large orifice of the pre-seepage conduit 4 is connected to an external pre-seepage container. The post-seepage conduit 5 is the same shape as the pre-seepage conduit 4. The small orifice of the post-seepage conduit 5 is connected to the bottom of the slide 1, and the large orifice is connected to an external post-seepage container. The center of the slide 1 is provided with a diamond-shaped hole. When the slide is subjected to tension, it causes stress concentration in the central area, resulting in greater strain than other areas. The four sides of the slide 1 are connected to a force transmission block 2, and the outer side is connected to the force block 3, so that the slide 1, the force transmission block 2, and the force block 3 are in the shape of a cross. Figure 2 As shown, the four sides of the slide 1, the force transmission block 2, and the force receiving block 3 are as shown in FIG. Figure 3 The slide 1, force transmission block 2, and force receiving block 3 are made of an integrated soft material to avoid misalignment and unevenness during connection, while reducing the influence of stress concentration at the connection. The elastic modulus of the material used is greater than or equal to 1MPa and less than or equal to 5MPa, and the elongation at break is greater than or equal to 500% and less than or equal to 1000%.

[0043] The slide 1 can be subjected to two pairs of tensile forces, and the magnitudes of the two pairs of tensile forces can be changed independently, so that the magnitude and direction of the stress on the central hole can also change accordingly.

[0044] The hole on the side of the force-bearing block 3 matches the size of the small-sized hook of the external stretching device, so the infiltration device can be loaded into the external stretching device, and the stretching device can be started to deform the micro-nano material.

[0045] The side of the force transmission block 2 is an arc tangent to the upper and lower planes of the slide. This arc design reduces the stress concentration at the connection between the side and the slide, so that the stress is better transmitted to the center area of ​​the slide.

[0046] like Figure 4 As shown in (a), when Figure 3When the two diagonal load-bearing blocks are subjected to a constant 1 kN tensile force and the other two load-bearing blocks are fixed, the stress distribution of the slide 1, load-transmitting block 2, and load-bearing block 3 as a whole is within the range of 0 to 2.5 MPa (excluding the endpoints). The maximum stress is distributed at the small hole of slide 1. Figure (b) is a partial view of Figure (a), showing the stress distribution of slide 1.

[0047] like Figure 5 As shown, the front seepage conduit 3 and the rear seepage conduit 4 are tubes with uniform thickness, and the small end is set in a trumpet shape, which can increase the bonding area. The trumpet-shaped part is bonded to the top and bottom of the slide 1 by liquid glue to ensure the air tightness of the device.

[0048] A design method for an assembleable micro-nano percolation device comprises the following steps:

[0049] a1: First, according to the size of the micro-nano material to be measured, the diameter of the circular hole of the slide 1 is d = l1 / 10, where l1 is the side length of the slide, and l1 should be larger than the diameter of the small end of the pre-seepage conduit 3 and the post-seepage conduit 4.

[0050] a2: According to mechanical simulation, the maximum thickness of the force-transmitting block 3 is selected to be 5 times the thickness of the slide 1. At the same time, the stress in the hole area of ​​the slide 1 is 5 times the stress on the force-transmitting block. Then σ2=5σ1, where σ2 is the maximum stress on the micro-nano material and σ1 is the stress on the side of the force-transmitting block 2.

[0051] a3: Measure the elastic modulus E of the material of the force transmission block 2. According to Hooke's law, σ1 = Ex, where x is the displacement of the hook and the force transmission block 2.

[0052] a4: When the hook displacement x reaches the maximum displacement x max When the maximum stress on the micro-nano material is 5Ex max , should be greater than the stress required for the deformation of micro-nano materials.

[0053] A working method for assembling a micro-nano percolation device comprises the following steps:

[0054] b1: Place the sheet-like micro-nano material to be tested and its carrier net on the central hole of the specimen slide 1, and then fix the edge of the carrier net on the specimen slide 1. The deformation of the edge of the carrier net is consistent with that of the specimen slide;

[0055] b2: The hook of the external stretching device is hung on the micro-nano permeation device through the hole, and the stretching device is started. The force-bearing block 3, the force-transmitting block 2, and the slide 1 are deformed, and a stress concentration is generated in the diamond hole area. The stress is greater than or equal to 3 times and less than or equal to 10 times the stress applied by the external stretching device to the force-bearing block 3. At the same time, deformation occurs, driving the micro-nano material to produce structural deformation;

[0056] b3: When the material is deformed, the external stretching device is kept at a constant tension. At this time, the micro-nano percolation device and the micro-nano material remain deformed and fixed. The external stretching device is placed in the scanning electron microscope chamber to observe the deformed morphology of the micro-nano material.

[0057] b4: When the material remains deformed, the pre-seepage conduit 4 and the post-seepage conduit 5 are installed on the upper and lower sides of the device to conduct a seepage performance test of the micro-nano material. The seepage experimental material is injected through the pre-seepage conduit 4. After the substances are screened by the micro-nano material, they pass through the circular holes of the slide 1 and the post-seepage conduit 5 and enter the external collection container. Subsequently, other chemical analysis experiments are carried out to analyze the seepage performance of the micro-nano material sample by comparing the changes in the substances before and after the seepage.

[0058] In the step b2, after the stretching device is started, when the slide 1, the force transmission block 2, the force block 3 and the external stretching device work in combination, the tension is adjusted to deform the micro-nano infiltration device to a predetermined position, and then the stretching device hook and the force block are fixed to keep the micro-nano material fixed and conduct an in-situ experiment. In this state, the entire device is placed in the scanning electron microscope chamber to observe the structure of the micro-nano material after deformation; after the observation is completed and it is taken out, the pre-infiltration conduit 3 and the post-infiltration conduit 4 are loaded onto the slide, and the fluid (liquid or gas) of the infiltration experiment is introduced to conduct a infiltration experiment on the deformed micro-nano material.

Claims

1. An assemblable micro-nano percolation device, characterized by: The device comprises a slide (1), a force transmission block (2), a force receiving block (3), a front seepage conduit (4) and a rear seepage conduit (5), all of which are made of the same soft material, and the overall length and width are both greater than or equal to 20 mm and less than or equal to 100 mm; The specimen slide (1) is a rectangular block with a diamond-shaped hole in the center and a square top surface. Each side surface is connected to the top surface of a force transmission block (2). The force transmission block (2) has a small top surface and a large bottom surface, and the bottom surface is square. The bottom surface is connected to the force-bearing block (3). The side surface of the force-bearing block (3) has a rectangular through hole. An external mechanical device can be hung through the through hole to perform a stretching operation. The pre-seepage conduit (4) is a tube body with uniform thickness, with a large orifice at one end and a small orifice at the other end. The small orifice of the pre-seepage conduit (4) is set in a trumpet shape and is connected to the top of the specimen slide (1). The large orifice of the pre-seepage conduit (4) is connected to an external pre-seepage container. The post-seepage conduit (5) has the same shape as the pre-seepage conduit (4). The small orifice of the post-seepage conduit (5) is connected to the bottom of the specimen slide (1), and the large orifice is connected to the external post-seepage container. Also included is a design method for an assembleable micro-nano percolation device, comprising the following steps: a1: First, according to the size of the micro-nano material to be measured, the diameter of the circular hole of the slide (1) is d = l1 / 10, where l1 is the side length of the slide, and l1 should be larger than the diameter of the small end of the seepage pre-duct (4) and the seepage post-duct (5); a2: According to mechanical simulation, the maximum thickness of the force-transmitting block (3) is selected to be 5 times the thickness of the slide (1). At the same time, the stress in the hole area of ​​the slide (1) is 5 times the stress on the force-transmitting block. Then, σ2=5σ1, where σ2 is the maximum stress on the micro-nano material and σ1 is the stress on the side of the force-transmitting block (2). a3: Determine the elastic modulus E of the material of the force transmission block (2). According to Hooke's law, σ1 = Ex, where x is the displacement of the hook and the force transmission block (2); a4: When the hook displacement x reaches the maximum displacement x max When the maximum stress on the micro-nano material is 5Ex max , should be greater than the stress required for the deformation of micro-nano materials.

2. The assemblable micro-nano percolation device according to claim 1, characterized in that: The slide (1) can be subjected to two pairs of tensile forces, and the magnitudes of the two pairs of tensile forces can be changed independently, so that the magnitude and direction of the stress on the central hole can also change accordingly.

3. The assemblable micro-nano percolation device according to claim 1, characterized in that: The holes on the side of the force-bearing block (3) match the size of the small-sized external stretching device hook, causing the micro-nano material to deform.

4. The assemblable micro-nano percolation device according to claim 1, characterized in that: The side of the force transmission block (2) is an arc tangent to the upper and lower planes of the slide.

5. The assemblable micro-nano percolation device according to claim 1, characterized in that: The front seepage conduit (4) and the rear seepage conduit (5) are tubes of uniform thickness, and the small-mouthed end is arranged in a trumpet shape, which can increase the bonding area. The trumpet-shaped portion is bonded to the upper and lower sides of the slide (1) by liquid glue dripping, thereby ensuring the airtightness of the device.

6. A working method for an assemblable micro-nano percolation device according to any one of claims 1 to 5, characterized in that: The following steps are involved: b1: placing the sheet-like micro-nano material to be tested and its carrier net on the central hole of the specimen slide (1), and then fitting and fixing the edge of the carrier net on the specimen slide (1), so that the deformation of the edge of the carrier net is consistent with that of the specimen slide; b2: The hook of the external stretching device is hung on the micro-nano infiltration device through the hole, and the stretching device is started, so that the force-bearing block (3), the force-transmitting block (2), and the specimen slide (1) are deformed, and stress concentration is generated in the diamond hole area, which is greater than or equal to 3 times and less than or equal to 10 times the stress applied by the external stretching device to the force-bearing block (3). At the same time, deformation occurs, driving the micro-nano material to produce structural deformation; b3: When the material is deformed, the external stretching device is kept at a constant tension. At this time, the micro-nano percolation device and the micro-nano material remain deformed and fixed. The external stretching device is placed in the scanning electron microscope chamber to observe the deformed morphology of the micro-nano material. b4: When the material remains deformed, the pre-seepage conduit (4) and the post-seepage conduit (5) are installed on the upper and lower sides of the device to conduct a seepage performance test of the micro-nano material. The seepage experimental material is injected through the pre-seepage conduit (4). After the substances are screened by the micro-nano material, they pass through the circular holes of the slide (1) and the post-seepage conduit (5) and enter the external collection container. Subsequently, other chemical analysis experiments are carried out to compare the changes in the substances before and after the seepage to analyze the seepage performance of the micro-nano material sample.

7. The working method of the assembleable micro-nano percolation device according to claim 6, characterized in that: In the step b2, after the stretching device is started, when the slide (1), the force transmission block (2), the force receiving block (3) and the external stretching device are combined to work, the tension is adjusted to deform the micro-nano infiltration device to a predetermined position, and the stretching device hook and the force receiving block are fixed to keep the micro-nano material fixed and conduct an in-situ experiment. In this state, the entire device is placed in the scanning electron microscope chamber to observe the structure of the micro-nano material after deformation; after the observation is completed and the device is taken out, the pre-infiltration conduit (4) and the post-infiltration conduit (5) are loaded onto the slide, and the fluid of the infiltration experiment is passed into the device to conduct the infiltration experiment on the deformed micro-nano material.

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