CN110508139A - A kind of electrodialysis Micropump - Google Patents
A kind of electrodialysis Micropump Download PDFInfo
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- CN110508139A CN110508139A CN201910799886.3A CN201910799886A CN110508139A CN 110508139 A CN110508139 A CN 110508139A CN 201910799886 A CN201910799886 A CN 201910799886A CN 110508139 A CN110508139 A CN 110508139A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/42—Electrodialysis; Electro-osmosis ; Electro-ultrafiltration; Membrane capacitive deionization
- B01D61/422—Electrodialysis
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Abstract
The invention discloses a kind of electrodialysis Micropumps, including fastening steel plate, electrolysis pond body and regenerated liquid channel, the fastening steel plate include one first fastening steel plate and one second fastening steel plate being oppositely arranged；The electrolysis pond body includes one first electrolysis pond body, a centre electrolysis pond body and one second electrolysis pond body；The electrolysis pond body is set between the fastening steel plate；The regenerated liquid channel includes a first passage and a second channel；An intermediate channel is set between the regenerated liquid channel；The regenerated liquid channel and the intermediate channel are set between the fastening steel plate；Wherein, the intersection between the electrolysis pond body and the regenerated liquid channel is provided with a cathode or an anode；A Bipolar Membrane is provided between the regenerated liquid channel and the intermediate channel.Electrodialysis Micropump provided by the invention can be used for the systems such as microfluid analysis, such as Flow Injection Analysis, micro-fluidic chip, capillary ion chromatography, it can be achieved that accurate driving of the electric field to micro fluid.
Description
Technical field
The present invention relates to analysis technical field more particularly to a kind of electrodialysis Micropumps.
Background technique
Micropump is micro-analysis system " heart ", is the power source of microfluid conveying, and function is that water is (or other molten
Liquid) it is transported to downstream analysis system.As a kind of important miniature execution unit, Micropump is not only in microfluid analysis, for example flows
Have in the systems such as dynamic Injection Analysis, micro-fluidic chip, capillary or nanoliter level liquid chromatogram, capillary ion chromatography and answers extensively
With, also can be widely used to drug conveying, blood transportation, DNA synthesis, Electronic Cooling System, micro-satellite propulsion system etc. neck
Domain.Whether flow is stable or whether is accurately directly related to the reproducibility quality of analysis result.But micro liquid driving is current
It is still a challenge.
It is piston pump and syringe pump that liquid, which conveys most common driving method, also the most mature.But these are taken out based on piston
The mechanical pump of drawing is only applicable to regular flow (such as milliliter grade/minute), common for micro-analysis system mul/min of stream
Speed, for these mechanical pumps due to that can have Micro blazed-grating between check valve and dynamic sealing, leakage is mul/min even several
Ten mul/min, therefore mechanical pump is difficult to provide accurate mul/min of flow.Another defect of mechanical pump is containing work
Dynamic component, due to frequent piston motion, physical abrasion is bigger, directly will lead to leakage；Another can provide miniflow
The Micropump of amount is exactly electroosmotic pump, it is a kind of Micropump that liquid driven is realized using electroosmotic flow.Its main feature is that output pressure is high, stream
Amount size and Orientation, which changes, easily to be realized by changing electric field level and direction.The mode needs the pump housing of special facture, and
Apply voltage and usually wants several kilovolts supreme ten thousand volts.The high pressure is unfavorable for operator's safety, especially in the biggish ring of humidity ratio
Under border.
Amberplex is that a kind of pair of ion has film made of the high molecular material of selective penetrated property.It is divided into sun from
Sub- film, anionic membrane and Bipolar Membrane.Wherein cationic membrane and anionic membrane are all monopole films, i.e., a kind of charge class is only contained on surface
Type.Cationic membrane surface fixed group is usually negatively charged sulfonic group, and cationic membrane only allows cation selective in principle
Property passes through；And anionic membrane surface fixed group is usually positively charged quaternary amine base, in principle anionic membrane only allow yin from
Sub- selectivity passes through；Bipolar Membrane is also known as bipolar membrane, is specific ion exchange membrane, it be by a cationic membrane and a yin from
A kind of cluster ion exchange membrane that sub- film is made according to special process.The characteristics of Bipolar Membrane is the effect in DC electric field
Under, the hydrone for the interface that cationic membrane and anionic membrane have a common boundary can be dissociated into hydrogen ion and hydroxide ion.The dissociation journey
Water decomposition in the significantly larger than free aqueous solution of degree.Bipolar Membrane and the combination of monopole film are in sea water desalination, chemical products with high added-value
Preparation etc. is widely used.
Summary of the invention
It, can the object of the present invention is to provide a kind of electrodialysis Micropump, it can be achieved that accurate driving of the electric field to micro fluid
For systems such as microfluid analysis, such as Flow Injection Analysis, micro-fluidic chip, capillary ion chromatography.
To achieve the goals above, the invention adopts the following technical scheme.
A kind of electrodialysis Micropump, including fastening steel plate, electrolysis pond body and regenerated liquid channel, the fastening steel plate include opposite
One first fastening steel plate and one second fastening steel plate being arranged；The electrolysis pond body includes one first electrolysis pond body, a centre electricity
Solve pond body and one second electrolysis pond body；The first electrolysis pond body, intermediate electrolysis pond body and the second electrolysis pond body are set to described
Between fastening steel plate；The regenerated liquid channel includes a first passage and a second channel；The first passage and described second
One intermediate channel is set between channel；The first passage, the intermediate channel and the second channel are set to the fastening
Between steel plate；Wherein, the intersection between the electrolysis pond body and the regenerated liquid channel is provided with a cathode or an anode；Institute
It states and is provided with a Bipolar Membrane between regenerated liquid channel and the intermediate channel；A cathode connection terminal is provided in the first passage
Mouthful, one end of the cathode connection terminal mouth is arranged on first fastening steel plate；Also, one is provided in the second channel
Anode connectivity port, corresponding with the cathode connection terminal mouth, one end of the anode connectivity port is arranged described second
On fastening steel plate.
Further, a cathode, and the cathode and institute are provided between the first electrolysis pond body and the first passage
Cathode connection terminal mouth is stated to be connected.
Further, an anode, and the anode and institute are provided between the second electrolysis pond body and the second channel
Anode connectivity port is stated to be connected.
Further, the Bipolar Membrane includes Bipolar Membrane anode membrane face and Bipolar Membrane cavity block face, the Bipolar Membrane anode membrane facing towards
The cathode, the Bipolar Membrane cavity block is facing towards the anode；Under the action of electric field, it can be hydrolyzed in the Bipolar Membrane
From phenomenon.
Further, the cathode and the anode are plate porous electrode.
Further, an ion is additionally provided between the Bipolar Membrane and the first passage or between the second channel
Exchange membrane.
Further, the amberplex includes cation-exchange membrane and anion-exchange membrane.Heretofore described ion
Multilayer can be set in exchange membrane, and the output pressure of electrodialysis Micropump can be improved in multiple-layer overlapped amberplex.
Further, the cation-exchange membrane is disposed in proximity to the side of the cathode, the anion-exchange membrane setting
In the side close to the anode.
Further, the both ends of the first passage are respectively arranged with a first passage entrance and first passage outlet, and institute
It states first passage entrance and first passage outlet is arranged on first fastening steel plate.
Further, the both ends of the second channel are respectively arranged with a second channel entrance and second channel outlet, and
The second channel entrance and second channel outlet are arranged on second fastening steel plate.
Further, the intermediate channel is the channel of hollow state, and the side of the intermediate channel has an intermediate channel to go out
Mouthful, the side of the intermediate electrolysis pond body is arranged in the intermediate channel outlet.
Further, filler is equipped in the intermediate channel, it is micro- that the filler is selected from ion exchange screen, ionic
One of ball, ionic integral post and fiber.
Further, full of the regenerated liquid continuously flowed in the regenerated liquid channel, the regenerated liquid is pure water or dilute electrolysis
Matter solution；The regenerated liquid is entered by first passage entrance, is exported and is flowed out from first passage after first passage, then by second
Feeder connection enters, and exports and flows out from second channel after second channel, flows back into regenerated liquid.
Further, under the action of electric field, regenerated liquid water decomposition in the Bipolar Membrane is hydrogen ion and hydroxyl
Ion.The hydrogen ion electromigration generated close to the Bipolar Membrane water decomposition of anode side passes through Bipolar Membrane anode membrane face to institute
Intermediate channel is stated, the hydroxide ion electromigration that water decomposition generates in the Bipolar Membrane of cathode side passes through described bipolar
Film cavity block face to the intermediate channel, the hydrogen ion and hydroxide ion of electromigration to the intermediate channel can be complex as water immediately
Molecule.Microfluidic liquid is generated in the intermediate channel, the microfluidic liquid is flowed out from intermediate channel outlet.
Further, the angle in the electrodialysis Micropump, above and below first fastening steel plate and second fastening steel plate
End is fastened with fastening screw.
Further, the electrodialysis Micropump is without any movable part.
In the present invention, the output pressure of pump is if desired improved, can be realized in such a way that following multilayer film is superimposed.Film sequence
(from anode to cathode) successively are as follows: anode/multilayer anionic membrane/Bipolar Membrane-Bipolar Membrane/multilayer cationic membrane/cathode.
The beneficial effects of the present invention are:
1. electrodialysis Micropump of the invention is a kind of Micropump of new model, the hydrogen for enhancing water decomposition generation in Bipolar Membrane is utilized
Ion and hydroxide ion electromigration are complex as water again, and electrodialysis Micropump generates the flow of water and the electric current of application is positively correlated
Principle.It is not related to the common gas of electrolysis water process in electrodialytic process of the invention to generate, current efficiency is higher, and effect is aobvious
It writes, and does not occur the report to electrodialysis Micropump content of the invention also at present.
2. achievable driving of the electric field to micro fluid of the present invention, by adjusting size of current realization to the flow velocity of minor amount of water
Regulation.
3. electrodialysis Micropump of the invention is conducive to sealing and operation stability, no mechanical wear without any movable part
And leakage phenomenon.
Detailed description of the invention
Fig. 1 is the diagrammatic cross-section of the electrodialysis Micropump in the embodiment of the present invention 1.
Fig. 2 is the diagrammatic cross-section of the electrodialysis Micropump in the embodiment of the present invention 2.
Fig. 3 is the flow velocity of the electrodialysis Micropump in the embodiment of the present invention 3 and the relational graph of electric current.
Fig. 4 is the flow velocity of the electrodialysis Micropump in the embodiment of the present invention 4 and the relational graph of electric current.
Fig. 5 is the spectrogram of the Conductivity detection potassium chloride sample in the embodiment of the present invention 5.
Fig. 6 is the tables of data trrellis diagram of electrodialysis Micropump output flow under the different electric currents in the embodiment of the present invention 6.
Label in figure is respectively as follows:
A, first passage；
B, intermediate channel；
C, second channel；
1, the first fastening steel plate；
2, the second fastening steel plate；
3, the first electrolysis pond body；
4, intermediate electrolysis pond body；
5, the second electrolysis pond body；
6, cathode；
7, cation-exchange membrane；
8, Bipolar Membrane；
801, Bipolar Membrane anode membrane face；
802, Bipolar Membrane cavity block face；
9, anion-exchange membrane；
10, anode；
11, fastening screw；
12, cathode connection terminal mouth；
13, anode connectivity port；
14, first passage entrance；
15, first passage exports；
16, intermediate channel exports；
17, second channel entrance；
18, second channel exports.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those skilled in the art's every other implementation obtained without creative efforts
Example, shall fall within the protection scope of the present invention.
Embodiment 1
A kind of electrodialysis Micropump, it is shown in Figure 1, including fastening steel plate, electrolysis pond body and regenerated liquid channel, the fastening
Steel plate includes one first fastening steel plate 1 and one second fastening steel plate 2 being oppositely arranged；The electrolysis pond body includes one first electrolysis
Electrolysis pond body 4 and one second electrolysis pond body 5 among pond body 3, one；The first electrolysis pond body 3, intermediate electrolysis pond body 4 and second
Electrolysis pond body 5 is held between the fastening steel plate；The regenerated liquid channel includes an a first passage A and second channel C；Institute
It states and an intermediate channel B is set between first passage A and the second channel C；The first passage A, the intermediate channel B and institute
Second channel C is stated to be set between the fastening steel plate；Wherein, the boundary between the electrolysis pond body and the regenerated liquid channel
Place is provided with a cathode or an anode；A Bipolar Membrane 8 is provided between the regenerated liquid channel and the intermediate channel B.It is described
The angle end of first fastening steel plate 1 and second fastening steel plate 2 is fastened with fastening screw 11.
First passage A, intermediate channel B and second channel C are provided between the intermediate electrolysis pond body 4.Described first is logical
Two apertures are arranged in the two sides of road A, respectively as first passage entrance 14 and first passage outlet 15.The first passage entrance
14 and first passage outlet 15 aperture be separately positioned on the two sides on first fastening steel plate 1.It is set in the first passage A
There is (corresponding with the anode connectivity port 13) cathode connection terminal mouth 12.One end setting of the cathode connection terminal mouth 12 exists
On first fastening steel plate 1.
Ion exchange screen is filled in the intermediate channel B.An aperture is arranged in the side the intermediate channel B, as
The side of the intermediate electrolysis pond body 4 is arranged in intermediate channel outlet 16, the aperture of the intermediate channel outlet 16.
Two apertures are arranged in the two sides the second channel C, respectively as second channel entrance 17, second channel outlet 18.
The aperture of the second channel entrance 17 and second channel outlet 18 is separately positioned on second fastening steel plate 2.Described
(corresponding with the cathode connection terminal mouth 12) anode connectivity port 13 is equipped in two channel Cs.The anode connectivity port 13
One end be arranged on second fastening steel plate 2.
As shown in Figure 1, the first passage A successively (is described) to set by the direction of Fig. 1 with the intermediate channel B ecto-entad
There are cathode 6, Bipolar Membrane 8, the Bipolar Membrane 8 includes Bipolar Membrane anode membrane face 801 and Bipolar Membrane cavity block face 802, and wherein Bipolar Membrane is positive
Outwardly, Bipolar Membrane cavity block face 802 is inwardly for film surface 801.Ecto-entad is layer-by-layer between the intermediate channel B and the second channel C
(describing by the direction of Fig. 1) is equipped with anode 10, Bipolar Membrane 8.Wherein Bipolar Membrane anode membrane face 801 inwardly, 802 court of Bipolar Membrane cavity block face
Outside.
In the present invention, (first passage A and second channel C are mutually indepedent for the intermediate channel B and two regenerated liquid channels
's.After applying an electric field, water decomposition generation hydrogen ion electromigration is logical to centre in the Bipolar Membrane 8 of 13 side of anode connectivity port
In road B, at the same time in the Bipolar Membrane 8 of 12 side of cathode connection terminal mouth water decomposition generate hydroxide ion also electromigration to intermediate
In the B of channel, the two is complex as hydrone.The flow of water follows Faraday's law, directly proportional to electric current is applied.
Embodiment 2
In the present embodiment, a kind of electrodialysis Micropump, shown in Figure 2, structure is essentially identical with embodiment 1, difference
It is only that: being equipped with cation-exchange membrane 7 and anion-exchange membrane 9 in the electrodialysis Micropump；It is filled in the intermediate channel B
Ion exchange resin.As shown in Fig. 2, ecto-entad is successively equipped with porous yin between the first passage A and the intermediate channel B
Pole 6, cation-exchange membrane 7 and Bipolar Membrane 8, wherein outwardly, Bipolar Membrane cavity block face 802 is inwardly in Bipolar Membrane anode membrane face 801；In described
Between between channel B and the second channel C ecto-entad be successively equipped with porous anode 10 and anion-exchange membrane 9 and Bipolar Membrane 8,
Wherein inwardly, Bipolar Membrane cavity block face 802 is outwardly in Bipolar Membrane anode membrane face 801.
Electrodialysis Micropump (see Fig. 2) in the present embodiment, can relative to the electrodialysis Micropump (see Fig. 1) in embodiment 1
Significantly improve the output pressure of electrodialysis Micropump, it is ensured that pump can still export effective discharge in the case where downstream damps high.
Embodiment 3
In the present embodiment, using the electrodialysis Micropump in the embodiment of the present invention 1, using pure water as regenerated liquid, regenerated liquid exists
Flowing in two sides regenerated liquid channel (first passage A and second channel C), flow velocity 0.1mL/min, and under the action of electric field,
Water is generated in intermediate channel B, i.e. generation microfluidic liquid.The flow velocity and electric current of the microfluidic liquid that electrodialysis Micropump generates are recorded,
As shown in Figure 3.
Fig. 3 is the flow velocity of the electrodialysis Micropump of the embodiment of the present invention 3 and the relational graph of electric current.
As can be seen from FIG. 3, the flow velocity for the microfluidic liquid that electrodialysis Micropump generates and the electric current of application are in a linear relationship.Cause
This, the present invention can control the flow velocity for generating microfluidic liquid by controlling the size of electric current.
Embodiment 4
In the present embodiment, using the electrodialysis Micropump in the embodiment of the present invention 1, using 1mM potassium sulfate solution as regenerated liquid,
Regenerated liquid flowing in two sides regenerated liquid channel (first passage A and second channel C), flow velocity 0.1mL/min, and in electric field
Under effect, water is generated in intermediate channel B, i.e. generation microfluidic liquid.Record the flow velocity for the microfluidic liquid that electrodialysis Micropump generates
With electric current, as shown in Figure 4.
Fig. 4 is the flow velocity of the electrodialysis Micropump of the embodiment of the present invention 4 and the relational graph of electric current.
As can be seen from FIG. 4, the flow velocity for the microfluidic liquid that electrodialysis Micropump generates and the electric current of application are in a linear relationship and quasi-
The slope for closing equation is higher than using pure water as regenerated liquid.
Embodiment 5
In the present embodiment, the electrodialysis Micropump for selecting the embodiment of the present invention 1 is infused using pure water as regenerated liquid using flowing
Penetrate the feasibility that analytical model evaluates the electrodialysis Micropump for micro-analysis system.
The electric current that electrodialysis Micropump applies is 30mA, and the flow velocity of regenerated liquid is 0.1mL/min, and 1mM potassium chloride is sample, into
Sample amount is 100nL.Electric conductivity detector measures spectrogram obtained by potassium chloride sample, as shown in Figure 5.
According to Fig. 5, it can be seen that electrodialysis Micropump of the invention can be very good to take in the potassium chloride sample in sampling valve
It takes in electric conductivity detector, realizes and it is detected, show the feasibility for the Flow Injection Analysis System.
Embodiment 6
In the present embodiment, the electrodialysis Micropump for selecting the embodiment of the present invention 1, using pure water as regenerated liquid, using weighing mould
The water flow velocity that formula test electrodialysis Micropump pumps out, records electrodialysis Micropump output flow under different electric currents, is as a result detailed in Fig. 6 institute
Show.
According to the data in Fig. 6 it is found that under 4 kinds of different size of functions of current, water flow velocity RSD≤1.38%, thus
As it can be seen that electrodialysis Micropump of the invention shows good operation stability.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
Member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (10)
1. a kind of electrodialysis Micropump, including fastening steel plate, electrolysis pond body and regenerated liquid channel, which is characterized in that the fastening steel
Plate includes one first fastening steel plate (1) and one second fastening steel plate (2) being oppositely arranged；
The electrolysis pond body includes one first electrolysis pond body (3), centre electrolysis pond body (4) and one second electrolysis pond body (5)；Institute
The first electrolysis pond body (3), intermediate electrolysis pond body (4) and the second electrolysis pond body (5) is stated to be set between the fastening steel plate；
The regenerated liquid channel includes a first passage (A) and a second channel (C)；The first passage (A) and described second
It is arranged between channel (C) intermediate channel (B), also, the first passage (A), the intermediate channel (B) and described second are led to
(C) is set between the fastening steel plate in road；
Wherein, the intersection between the electrolysis pond body and the regenerated liquid channel is provided with a cathode or an anode；It is described again
Being arranged respectively between raw liquid channel and the intermediate channel (B) has a Bipolar Membrane (8)；A yin is provided in the first passage (A)
One end of pole connectivity port (12), the cathode connection terminal mouth (12) is arranged on first fastening steel plate (1)；Also,
An anode connectivity port (13) is provided in the second channel (C), it is corresponding with cathode connection terminal mouth (12),
One end of the anode connectivity port (13) is arranged on second fastening steel plate (2).
2. electrodialysis Micropump according to claim 1, which is characterized in that first electrolysis pond body (3) and described first
It is provided between channel (A) cathode (6), and the cathode (6) is connected with the cathode connection terminal mouth (12)；
It is described second electrolysis pond body (5) and the second channel (C) between be provided with an anode (10), and the anode (10) and
The anode connectivity port (13) is connected.
3. electrodialysis Micropump according to claim 1, which is characterized in that the Bipolar Membrane (8) includes Bipolar Membrane anode membrane face
(801) and Bipolar Membrane cavity block face (802), Bipolar Membrane anode membrane face (801) is towards the cathode (6), the Bipolar Membrane cavity block
Face (802) is towards the anode (10).
4. electrodialysis Micropump according to claim 1, which is characterized in that the cathode (6) and the anode (10) are flat
Plate porous electrode.
5. electrodialysis Micropump according to claim 1, which is characterized in that the Bipolar Membrane (8) and the first passage (A)
Between or between the second channel (C) be additionally provided with an amberplex.
6. electrodialysis Micropump according to claim 5, which is characterized in that the amberplex includes cation-exchange membrane
(7) and anion-exchange membrane (9)；The cation-exchange membrane (7) is disposed in proximity to the cathode (6) side, and the anion is handed over
It changes film (9) and is disposed in proximity to the anode (10) side.
7. electrodialysis Micropump according to claim 1, which is characterized in that the both ends of the first passage (A) are respectively set
There are a first passage entrance (14) and first passage outlet (15), and the first passage entrance (14) and first passage outlet
(15) it is arranged on first fastening steel plate (1).
8. electrodialysis Micropump according to claim 1, which is characterized in that the both ends of the second channel (C) are respectively set
There are a second channel entrance (17) and second channel outlet (18), and the second channel entrance (17) and the second channel
Outlet (18) is arranged on second fastening steel plate (2).
9. electrodialysis Micropump according to claim 1, which is characterized in that the intermediate channel (B) is the logical of hollow state
Road, the side of the intermediate channel (B) have an intermediate channel to export (16), and intermediate channel outlet (16) setting is in described
Between be electrolysed pond body (4) side.
10. -9 described in any item electrodialysis Micropumps according to claim 1, which is characterized in that be equipped in the intermediate channel (B)
Filler, the filler are selected from one of ion exchange screen, ionic microballoon, ionic integral post and fiber.
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| CN201910799886.3A CN110508139B (en) | 2019-08-28 | 2019-08-28 | Electrodialysis micropump |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111921380A (en) * | 2020-09-27 | 2020-11-13 | 江西源春环保科技有限公司 | Repair system based on electrodialysis separation technology and assembling method thereof |
| CN112129671A (en) * | 2020-09-24 | 2020-12-25 | 东北大学 | Device and method for measuring hydrogen diffusion coefficient of solid steel at high temperature |
| CN115236137A (en) * | 2022-07-19 | 2022-10-25 | 江苏师范大学 | Device for detecting sweat ions |
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