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Low-pressure electroosmosis pump based on nano porous thin film

A nanoporous, porous film technology, used in laboratory containers, laboratory utensils, fluid controllers, etc., to achieve low cost, uniform pore size, and excellent mechanical effects

Active Publication Date: 2019-03-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a low-voltage electroosmotic pump based on nanoporous membranes, which can drive fluid movement at a driving voltage of 0.2V, so no bubbles are generated during the reaction, and there is no need to consider that the efficiency of the bubbles blocking the pores is reduced or even the flow rate is reduced. problem with stopping transmission

Method used

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  • Low-pressure electroosmosis pump based on nano porous thin film
  • Low-pressure electroosmosis pump based on nano porous thin film
  • Low-pressure electroosmosis pump based on nano porous thin film

Examples

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Embodiment 1

[0036] The structure of the low-voltage electroosmotic pump based on the nanoporous membrane is as follows: figure 1 As shown: the nanoporous film composed of nanoporous silicon dioxide film 2 and silicon nitride microporous film 1 forms a sandwich structure with two silica gel gaskets, and is integrated between the first chamber 4 and the second chamber 5; In the first chamber and the second chamber, silver / silver chloride electrodes are respectively installed as the first driving electrode 6 and the second driving electrode 7; the first chamber and the second chamber are filled with electrolyte solutions 8 and 9 .

[0037] Transmission electron microscope image of nanoporous silica film figure 2 As shown, the scanning electron microscope image of the nanoporous film is shown in figure 2 shown. Among them, the average pore diameter of the nanoporous silicon dioxide film is 2.3nm, the porosity is 16.7%, and the thickness is 75nm; the thickness of the silicon nitride micro...

Embodiment 2

[0043] For the low-voltage electroosmotic pump provided in Example 1, the distance between the first driving electrode and the second driving electrode is 2mm; the average pore diameter of the nanoporous silicon dioxide film is 2nm, the porosity is 17%, and the thickness is 100nm; The silicon nitride microporous film has a thickness of 100 nm, a pore diameter of 4 μm, and a pore spacing of 40 μm.

Embodiment 3

[0045] For the low-voltage electroosmotic pump provided in Example 1, the distance between the first driving electrode and the second driving electrode is 2mm; the average aperture of the nanoporous silicon dioxide film is 2.5nm, the porosity is 16%, and the thickness is 100nm; The silicon microporous film has a thickness of 150 nm, a pore diameter of 6 μm, and a pore spacing of 20 μm.

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Abstract

The invention discloses a low-pressure electroosmosis pump based on an ultra-thin nano porous film. The pump comprises a first cavity chamber, a second cavity chamber and a nano porous thin film arranged in the middle of the first cavity chamber and the second cavity chamber, wherein the first cavity chamber and the second cavity chamber are filled with electrolyte solutions, and a first driving electrode and a second driving electrode are respectively mounted in the first cavity chamber and the second cavity chamber; and the nano porous thin film is a composite film of a nano porous silicon dioxide film and a silicon nitride micron porous film. The low-pressure electroosmosis pump is simple in structure, easy to operate and easy to realize, and the electroosmosis pump can drive fluid to move under a driving voltage of 0.2V, so that no bubble is generated in the reaction, and the problem that the efficiency is reduced or even the fluid stops transmitting due to the blocking of pore channels by bubbles does not need to be considered.

Description

technical field [0001] The invention belongs to the technical field of liquid delivery, and in particular relates to a low-voltage electroosmotic pump based on a nanoporous film. Background technique [0002] As a self-equipped device in the microfluidic system, the micropump is very important to push the corresponding fluid to move. So far, various micropumps have been used in microfluidic systems, and can be divided into mechanical micropumps and non-mechanical micropumps according to whether they contain mechanical moving parts. Among them, the mechanical pump provides the driving force for fluid flow according to the deformation of the micro-membrane. The advantage of this pump is that it can drive any liquid, but the disadvantage is that the voltage required to drive it is too high (-100-200V) and the resulting flow is pulsed rather than continuous. Compared with mechanical micropumps, non-mechanical micropumps do not have moving parts, so for the entire microfluidic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01L3/00
CPCB01L3/50273B01L2400/0418
Inventor 苏彬杨倩
Owner ZHEJIANG UNIV
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