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A microscopic pore model with variable surface wettability and methods for making and using the same

A microscopic model and microscopic pore technology, applied in the field of multiphase seepage, can solve the problems of narrow application range, high cost, complicated operation, etc., and achieve the effect of low cost, quick assembly and disassembly, and simple production method

Inactive Publication Date: 2021-06-04
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some current research methods include: modifying the surface of the glass microscopic model with a silane coupling agent, applying a coating material to the surface of the microscopic model to change the wettability, replacing different intrusion fluids to adapt to different wettability conditions, etc. , these methods have some disadvantages such as complex operation, high cost, cumbersome process or narrow application range.

Method used

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  • A microscopic pore model with variable surface wettability and methods for making and using the same
  • A microscopic pore model with variable surface wettability and methods for making and using the same
  • A microscopic pore model with variable surface wettability and methods for making and using the same

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Effect test

Embodiment 1

[0029] The present invention provides a microscopic pore model with variable surface wettability. The main structure is as follows: figure 1 As shown, it includes: an upper cover plate 1 , an upper cushion layer 2 , an upper pattern layer 3 of the microscopic model, a lower horizontal layer 4 of the microscopic model and a lower cover plate 5 .

[0030] Among them, the shape of the upper cover plate 1 and the bottom cover plate 5 are both rectangular, the size is 85mm×60mm, the thickness is 4mm, the material is transparent plexiglass, the four corners are chiseled with a through hole 7 with a diameter of 3mm, and the screw 8 passes through it. The through hole 7 is used to fix the microscopic model as a whole; the upper cover plate 1 is engraved with three injection holes 6 with a diameter of 3mm, and the positions of the three injection holes 6 are respectively connected with the water phase injection hole 9 of the pattern layer 3 on the upper part of the microscopic model. T...

Embodiment 2

[0034] A method for making a microscopic pore model with variable surface wettability provided by the present invention specifically comprises the following steps:

[0035] (1) Mold making: use MATLAB software to generate CAD drawings of the required patterns, and process the mask plate according to the CAD drawings; select a 4-inch single-crystal silicon wafer with a flat and clean surface, and spin coat a layer of thickness on the surface of the silicon wafer with a coating machine 40μm SU8-2035 photoresist, the rotation speed is 3300 rpm; after the coating is finished, place the silicon wafer coated with photoresist on the hot stage and bake it at 65°C for 3 minutes, then bake it at 95°C for 6 minutes Take it off; after the baking is completed, use a mask plate to perform UV exposure under the photolithography machine for 16s. Next; then soak the silicon wafer in the SU8-2035 photoresist developer for 5 minutes, take it out and rinse it repeatedly with isopropanol and alcoh...

Embodiment 3

[0040] The invention provides a method for using a microscopic pore model with variable surface wettability, which specifically includes the following steps:

[0041] (1) Connect the injection holes (9, 10, 12) of the microscopic model with the pipeline, the pipeline of the buffer hole 10 is connected with the waste liquid container, and the pipelines of the injection holes (9, 12) at both ends are connected with the micro syringe, and the microscopic Place the syringe on the high-precision syringe pump; inhale appropriate amount of silicone oil and deionized water into the high-precision syringe pump, and inject high-viscosity silicone oil (viscosity 1000cs) from the oil phase injection hole 12 at a relatively low rate (such as 0.01μL / min) , close the syringe pump when the silicone oil flows out from the buffer hole 10;

[0042] (2) Inject dyed deionized water from the water phase injection hole 9 according to the experimental setting rate (such as 0.5 μ L / min), and stop inje...

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Abstract

The invention discloses a microscopic pore model with variable surface wettability and methods for making and using the same, and belongs to the technical field of rock mass and soil multiphase seepage. The microscopic model includes an upper cover plate, an upper cushion layer, an upper pattern layer of the microscopic model, a lower horizontal layer of the microscopic model and a lower cover plate. The manufacturing method comprises the following steps: making a photoresist mold and a PDMS (polydimethylsiloxane) mold, making a microscopic model, modifying the surface wettability of the microscopic model, and fixing the model. The method has simple manufacturing process, low cost and flexible overall assembly; the surface wettability of the microscopic model can be changed in a wide range, and can be applied to most experimental conditions; the research using the microscopic model proposed by the present invention can cover imbibition and displacement, It is helpful to explore the physical mechanism of multiphase seepage.

Description

technical field [0001] The invention relates to the technical field of multiphase seepage inside rock mass and in soil pores, and more specifically relates to a microscopic pore model with variable surface wettability and a method for making and using the same. Background technique [0002] The multiphase seepage process inside the underground rock mass and in the soil pores involves many important natural and industrial processes, such as the leakage of hydropower dams, the pollution restoration of urban groundwater systems, and the geological storage of nuclear waste. The difference in physical properties of the rock mass surface can significantly affect the multiphase seepage process, and understanding the law of its influence is of great significance for understanding the physical mechanism of multiphase seepage. Some current research methods include: modifying the surface of the glass microscopic model with a silane coupling agent, applying a coating material to the sur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08
CPCG01N15/088
Inventor 胡冉魏鹳举廖震周晨星陈旭升郭威武东生王一凡陈益峰
Owner WUHAN UNIV
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