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Solid-liquid conversion device and method for material in micropores

A converter device and micropore technology, which is applied in the field of solid-liquid converter devices for materials in micropores, can solve the problems of slow dissolution rate, low dissolution efficiency of soluble photosensitive resin, and difficulty in material dissolution.

Pending Publication Date: 2021-09-10
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above-mentioned defects in the prior art, the purpose of the present invention is to provide a device and method for solid-liquid exchange of materials in micropores. According to the properties of the solid-liquid interface in the micropores and the environment of solid-liquid exchange, a set of high High-efficiency forced convection device to solve the difficulty of dissolving materials in the microporous structure, the dissolution quality of typical micro-nano processed structural parts is restricted by the openness of the structure and the dissolution surface, the soluble photosensitive resin in the three-dimensional microporous structure has low dissolution efficiency and slow dissolution rate, etc. problem, improve the quality of the microcolumn structure based on the overmolding manufacturing method, and reduce its molding cost

Method used

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  • Solid-liquid conversion device and method for material in micropores
  • Solid-liquid conversion device and method for material in micropores
  • Solid-liquid conversion device and method for material in micropores

Examples

Experimental program
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Effect test

Embodiment 1

[0039] This implementation case is to realize the 3D printing of soluble resin molds and the solid-liquid commutation and dissolution in paraffin micropores. Refer to figure 1 , the specific process includes the following steps:

[0040] (1) Use 3D printing technology and stereolithography technology to prepare the required two-dimensional photolithographic microchannel mold and three-dimensional structure soluble resin mold, and do corresponding post-processing;

[0041] Preparation of resin mold:

[0042] Weigh 60g comonomer N, N-dimethylacrylamide by electronic scale, pour it into the beaker for later use, then weigh 60g comonomer methyl methacrylate and pour it into the beaker and N, N - Dimethacrylamide is mixed, and then 45g of cross-linking cracking agent methacrylic anhydride is weighed and poured into a beaker so that the three are fully mixed. Put the beaker containing the mixed solution into a magnetic stirring water bath, and stir in an oil bath at 50°C for 30 mi...

Embodiment 2

[0053] This implementation case is to realize the three-dimensional sponge structure solid-liquid commutation method using PDMS as material, refer to Figure 8 , including the following steps:

[0054] (1) Prepare the required PDMS mold and do corresponding post-processing;

[0055] PDMS material preparation:

[0056] Weigh 60g polydimethylsiloxane (PDMS, 184silicone elastomerbase) with an electronic scale, pour it into a beaker for later use, then take 10g of curing agent according to the mass fraction of 10:1, mix PDMS and curing agent to obtain a matrix, and put magnetic stirring in the mixture Use a magnetic stirrer to stir at a speed of 60 rad / s for 10 minutes. After fully stirring, put it into a vacuum pump to draw an absolute vacuum to ensure that there are no air bubbles in the PDMS.

[0057] (2) Cover the formed mold with the liquid insoluble material to be formed, and wait for the insoluble material to solidify to complete the forming of the microporous structure; ...

Embodiment 3

[0066] This implementation case is to realize high-efficiency solid-liquid commutation on a two-dimensional channel-shaped surface. Refer to Figure 9 , the specific preparation process includes the following steps:

[0067] (1) Use 3D printing technology and stereolithography technology to prepare the required two-dimensional photolithographic microchannel mold, three-dimensional structure soluble resin mold or PDMS mold, and perform corresponding post-processing.

[0068] Preparation of photolithographic microchannel molds:

[0069] Select a piece of PC board (or silicon wafer) as the photoresist substrate, ultrasonically put the PC board in alcohol for 10s, then put it in an oven and set the temperature not higher than 60°C to dry, and then spin coat it on the PC board through a coater The photoresist is AZ4620, the spin coating speed is 600 at low speed and 900 at high speed, and the thickness of the photoresist is 15-17 μm. Place the spin-coated photoresist on a drying ...

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Abstract

The invention relates to a solid-liquid conversion device and method for a material in a micropore. The method comprises the following steps of: (1) preparing a required two-dimensional photoetching micro-channel mold, a soluble resin mold with a three-dimensional structure or a PDMS mold; (2) forming a micropore structure by using the mold; (3) qualitatively analyzing the surface attributes of the two-dimensional and three-dimensional molds and the attributes of a used dissolving solution, and carrying out interface and environment regulation and control, the PDMS mold not needing to be regulated and controlled; (4) placing the mold in a forced convection device; and (5) starting the forced convection device, and stopping working when the concentration of a soluble material in a solution in a filtering chamber is reduced to a set threshold, thus completing solid-liquid conversion in the micropores. A set of high-efficiency forced convection device is designed by regulating and controlling the attributes of the solid-liquid interface in the micropores and the solid-liquid conversion environment in order to solve the problems that a material in a micropore structure is difficult to dissolve, the dissolving quality of a typical micro-nano machining structural part is limited by structural openness and a dissolving surface, and soluble photosensitive resin in a three-dimensional micropore structure is low in dissolving efficiency, low in dissolving rate and the like.

Description

technical field [0001] The present invention is applicable to the fields of micro-nano manufacturing technology and micro-nano processing technology, and particularly relates to a solid-liquid exchange device and method for materials in micropores, specifically, the materials in micropores are processed through the processes of interface regulation, environment regulation and forced convection. Solid-liquid exchange, while providing a device that can realize forced solid-liquid exchange, so as to realize high-efficiency and high-quality solid-liquid exchange of materials in micropores. Background technique [0002] In recent years, with the vigorous development of micro-nano manufacturing technology, the forming methods of micro-structured devices have gradually diversified. For example, technologies such as surface exposure and stereoscopic microlithography have not only contributed to the designability of the structure of micro-devices, but also further improved the structu...

Claims

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Application Information

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IPC IPC(8): C08F271/02C08F220/54C08F220/14C08F2/48B33Y80/00
CPCC08F271/02C08F2/48B33Y80/00C08F220/54C08F220/14
Inventor 牛万灏陈小明王春江王硕邦邵金友徐超凡李祥明陈小亮
Owner XI AN JIAOTONG UNIV
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