Ion selective separation membrane characterization analysis device and method

Abstract

The invention discloses an ion selective separation membrane characterization analysis device and method in the technical field of membrane separation, the ion selective separation membrane characterization analysis device comprises a separation assembly and a power supply assembly, the separation assembly comprises a first pool body and a second pool body, and cavities are formed in the first pool body and the second pool body. Fluid in the microflow plate is guided out through the multiple microflow openings, a solution flows in the cavities of the first pool body and the second pool body in a self-circulation mode, the solution in the first pool body and the solution in the second pool body are driven to flow evenly, the first pool body and the second pool body are both in a plate shape, the overall size occupied by the first pool body and the second pool body is small, and complete filling can be achieved without a large amount of solution; a trace experiment can be carried out by providing a small amount of target solution, and when solutions with different ion concentrations are used for a membrane mass transfer characterization experiment, the required solution amount is small, so that solution waste is avoided, the concentration polarization influence is remarkably reduced, the test precision is improved, and meanwhile, the problems of membrane deformation and the like caused by non-uniform pressure distribution on the two sides of the membrane are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of membrane separation, in particular to an ion selective separation membrane characterization and analysis device and method. Background Art

[0002] Ion selective separation membranes (ion separation membranes) such as nanofiltration, reverse osmosis, and ion exchange membranes can achieve ion selective separation or ion exchange, and have been widely used in drinking water treatment, high-purity water preparation, sewage and wastewater deep treatment and reuse, batteries, etc. Clarifying the interaction between ions and membranes and their strength is of great significance for a deep understanding of the interception and screening mechanism of ion selective membranes and the development of separation membranes with better separation performance.

[0003] Existing ion selective separation membrane characterization and analysis devices have volume limitations. Ordinary ion selective separation membrane characterization and analysis devices have problems such as large volume. When conducting ion transmembrane barrier determination experiments, more target solutions are required, which is inconvenient to conduct micro-experiments and rapid experiments, and there is a lot of reagent waste. At the same time, the stirring system of ordinary ion selective separation membrane characterization and analysis devices has problems such as poor mixing effect and large differences in fluid flow rates, which are easy to affect the results of ion separation membrane characterization and analysis. Therefore, the present invention designs an ion selective separation membrane characterization and analysis device and method to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide an ion selective separation membrane characterization analysis device and method to solve the above-mentioned problems of large waste of reagents, inconvenience in conducting micro-experiments and rapid experiments, poor solution mixing effect, and uneven fluid flow rate.

[0005] To achieve the above object, the present invention provides the following technical solutions: An ion selective separation membrane characterization and analysis device comprises a separation component and a power supply component: the separation component comprises a first cell body and a second cell body, the first cell body and the second cell body are both provided with cavities inside, the cavities of the first cell body and the second cell body are connected, a membrane body frame is mounted on the middle of the first cell body and the second cell body, an ion separation membrane is mounted in the membrane body frame, the first cell body and the second cell body are both connected with a microfluidic plate on the inner wall relative to the ion separation membrane, a plurality of microfluidic channels are opened inside the microfluidic plate, a plurality of microfluidic ports are opened on the microfluidic plate, and the microfluidic The channel is connected to multiple microflow ports, and the multiple microflow channels are connected to a liquid supply pipe. The bottom end of the liquid supply pipe is connected to a microflow pump body, and the microflow pump body is embedded and connected to the inner wall of the first cell body and the inner wall of the second cell body; the power supply component includes a cover body and an electrode body, and the cover body is snap-connected to the upper open ends of the first cell body and the second cell body. The cover body is provided with a placement groove, and the electrode body is snap-connected and installed in the placement groove. The upper end of the electrode body is connected to a power supply line, and the power supply line is electrically connected to the electrochemical workstation. The microflow pump body introduces the solution inside the cavity of the first cell body and the second cell body into the liquid supply pipe.

[0006] As a further solution of the present invention: a collecting cavity is respectively provided at the bottom of the first cell body and the second cell body.

[0007] As a further solution of the present invention: the multiple microfluidic channels inside the microfluidic plate are equidistantly distributed, and the multiple microfluidic ports are equidistantly distributed on the microfluidic channels.

[0008] As a further solution of the present invention: more than one placement groove is provided on the upper end of the cover body, and the more than one placement groove is arranged on the same straight line.

[0009] As a further solution of the present invention: it also includes a heating component, the heating component includes an outer shell, a solution cavity is opened inside the outer shell, the solution cavity is filled with a water bath solution, the separation component is arranged in the outer shell, and a heating plate is connected to one side of the outer shell, and the heating plate heats the water bath solution.

[0010] As a further solution of the present invention: the inner wall of the outer shell is connected to a plurality of water pumps, and the plurality of water pumps are arranged around the separation component.

[0011] As a further solution of the present invention: the outer walls of the first cell body and the second cell body are connected to a plurality of isolation plates, and the isolation plates are closely connected to the inner wall of the outer shell.

[0012] As a further solution of the present invention: a plurality of groups of the isolation plates are arranged in parallel and equidistantly, and the plurality of groups of the isolation plates are arranged in parallel with a plurality of microfluidic channels.

[0013] As a further solution of the present invention: a reflux groove is provided at the bottom of each of the first tank body and the second tank body, and the cross section of the reflux groove is U-shaped.

[0014] An ion separation membrane separation method is applied to the ion selective separation membrane characterization and analysis device as described in the above scheme, and the method comprises the following steps: S1, introducing the prepared first solution into the first cell body, and introducing the prepared second solution into the second cell body; S2, turning on the electrochemical workstation, connecting the electrode body in the first cell body and the electrode body in the second cell body to a power source, and forming a voltage difference between the first cell body and the second cell body; S3, select the measurement mode of the electrochemical workstation, set the stable temperature of the heating component, measure the membrane potential, membrane resistance, membrane capacitance, and salt transmembrane energy barrier of the ion separation membrane at different temperatures, and record them; S4, further deriving and calculating the data obtained in step S3, obtaining the film zeta potential, ion migration number, membrane conductivity, membrane thickness, and ion transmembrane energy barrier of the ion separation membrane, and recording them; S5. Change the type of salt solution inside the first cell body and the second cell body, repeat steps S2-S4, obtain the membrane potential, membrane resistance, membrane capacitance, salt transmembrane energy barrier, film zeta potential, ion migration number, membrane conductance, membrane thickness, ion transmembrane energy barrier under different salt solutions, and record them.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the fluid in the microfluidic plate is discharged through multiple microflow ports, and the solution self-circulates in the cavities of the first cell body and the second cell body, driving the uniform flow of the solution in the first cell body and the second cell body. The first cell body and the second cell body are both plate-shaped, and the microfluidic plate is matched and installed on their inner walls. The overall volume of the first cell body and the second cell body is small, and can be completely filled without much solution. A small amount of target solution can be provided to carry out a micro experiment. When using solutions with different ion concentrations to carry out membrane mass transfer characterization experiments, a small amount of solution is required, which avoids solution waste, significantly reduces the influence of concentration polarization, improves test accuracy, and avoids problems such as membrane deformation caused by uneven pressure distribution on both sides of the membrane.

[0016] 2. In the present invention, the solution is pressurized and stirred in the microfluidic pump body, the fluid is stirred for the second time in the liquid supply tube, and is stirred for the third time in multiple microfluidic channels. After being led out of multiple microfluidic ports, the flowing fluid is mixed with the fluid in the cavity, thereby achieving uniform stirring of the fluid inside the first cell body and the second cell body, ensuring uniform ion distribution inside the ion solution, reducing the influence of concentration polarization, and making the two sides of the ion separation membrane evenly stressed, avoiding deformation of the ion separation membrane during use, and providing a more stable ion separation membrane characterization and analysis operating environment.

[0017] 3. In the present invention, multiple groups of water pumps connected to one end of the outer shell drive the water bath solution, allowing the water bath solution to flow in a directional direction toward the separation component, thereby achieving more uniform and stable water bath heating of the separation component. After the water bath solution undergoes heat exchange with the outer wall of the first cell body and the second cell body, the outer wall of the cell body undergoes heat exchange with the solution inside the multiple microfluidic channels, and the solution inside the first cell body and the second cell body circulates back and forth through the microfluidic channels, allowing the solution inside the first cell body and the second cell body to be quickly kept at a constant temperature in a water bath, which is convenient to operate and is conducive to rapid experiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the overall explosion structure of the present invention; Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle; Figure 4 It is a rear-view stereoscopic structural schematic diagram of the present invention; Figure 5 It is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the separation component of the present invention.

[0019] In the figure: 1. separation component; 101. first cell body; 102. second cell body; 103. microfluidic plate; 104. microfluidic channel; 105. liquid supply pipe; 106. microfluidic pump body; 107. membrane frame; 108. ion separation membrane; 109. isolation plate; 110. reflux groove; 111. collection chamber; 112. cavity; 113. microfluidic port; 2. power supply component; 201. cover body; 202. placement slot; 203. electrode body; 204. power supply line; 3. heating component; 301. outer shell; 302. solution chamber; 303. heating plate; 304. water pump. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Embodiment 1: See also Figure 1-Figure 6 In an embodiment of the present invention, an ion selective separation membrane characterization and analysis device comprises a separation component 1 and a power supply component 2: The separation component 1 includes a first cell body 101 and a second cell body 102, wherein the first cell body 101 and the second cell body 102 are both provided with a cavity 112, the first cell body 101 and the second cell body 102 are connected to each other, a membrane frame 107 is mounted in the middle of the first cell body 101 and the second cell body 102, an ion separation membrane 108 is mounted in the membrane frame 107, the inner wall of the first cell body 101 and the second cell body 102 relative to the ion separation membrane 108 is connected to a microfluidic plate 103, a plurality of microfluidic channels 104 are provided in the microfluidic plate 103, a plurality of microfluidic ports 113 are provided on the microfluidic plate 103, and a plurality of microfluidic channels 104 are provided in the microfluidic plate 103. The channel 104 is connected to a plurality of microfluidic ports 113, and a plurality of microfluidic channels 104 are connected to a liquid supply tube 105. The bottom end of the liquid supply tube 105 is connected to a microfluidic pump body 106, and the microfluidic pump body 106 is embedded and connected to the inner wall of the first cell body 101 and the inner wall of the second cell body 102; the power supply component 2 includes a cover body 201 and an electrode body 203, and the cover body 201 is snap-fitted to the upper open ends of the first cell body 101 and the second cell body 102, and the cover body 201 is provided with a placement groove 202, and the electrode body 203 is snap-fitted and installed in the placement groove 202, and the upper end of the electrode body 203 is connected to a power supply line 204, and the power supply line 204 is electrically connected to the electrochemical workstation.

[0022] The separation assembly 1 of the present invention comprises a first cell body 101 and a second cell body 102, wherein a solution is placed in an internal cavity 112 of the first cell body 101 and the second cell body 102, the cavities 112 of the first cell body 101 and the second cell body 102 are connected, a membrane frame 107 is arranged between the cavities 112 of the first cell body 101 and the second cell body 102, an ion separation membrane 108 is installed inside the membrane frame 107, the ion separation membrane 108 is fixed by the membrane frame 107, and is installed in the middle of the cavity 112 of the first cell body 101 and the second cell body 102, and ion separation is carried out. For selective separation, the inner walls of the first cell body 101 and the second cell body 102 are connected to the microfluidic plate 103, a plurality of transverse microfluidic channels 104 and microfluidic ports 113 are provided inside the microfluidic plate 103, the microfluidic plate 103 is connected to the liquid supply pipe 105, the liquid supply pipe 105 supplies liquid through the microfluidic pump body 106, the microfluidic pump body 106 introduces the solution inside the cavity 112 of the first cell body 101 and the second cell body 102 into the liquid supply pipe 105, the fluid in the liquid supply pipe 105 is pressurized and introduced into the microfluidic plate 103, and the fluid in the plurality of microfluidic plates 103 is discharged through the plurality of microfluidic ports 113. The solution self-circulates in the cavity 112 inside the first cell body 101 and the second cell body 102, driving the solution in the cavity 112 of the first cell body 101 and the second cell body 102 to flow evenly. The solution is pressurized and stirred in the microfluidic pump body 106, and the fluid is also stirred twice in the liquid supply pipe 105, and is stirred three times in the multiple microfluidic channels 104. After being led out of the multiple microfluidic ports 113, the flowing fluid is mixed with the fluid in the cavity 112, so as to achieve uniform stirring of the fluid inside the first cell body 101 and the second cell body 102, and ensure uniform ion distribution inside the solution. The power supply component 2 supplies power to the device, the cover body 201 is snapped on the openings of the first cell body 101 and the second cell body 102, the placement groove 202 of the cover body 201 is used to install the electrode body 203, and the power supply line 204 on the electrode body 203 is connected to the electrochemical workstation, and different power supply modes are provided by the electrochemical workstation to provide different voltages inside the cavity 112 of the first cell body 101 and the second cell body 102, and the transmembrane barrier measurement experiment under different ion concentrations is carried out. The first cell body 101 and the second cell body 102 are both plate-shaped, and the microfluidic plate 103 is matched and installed on the inner wall thereof. The overall volume occupied by the first cell body 101 and the second cell body 102 is small. The solution in the cavity 112 of the first cell body 101 and the second cell body 102 drives the solution to be stirred and disturbed through multiple microfluidic channels 104 inside the microfluidic plate 103. The microfluidic plate 103 on the inner wall of the first cell body 101 and the microfluidic plate 103 on the inner wall of the second cell body 102 guide the evenly rotating solution to flow toward the ion separation membrane 108, so that the force on both sides of the ion separation membrane 108 is evenly applied, thereby avoiding damage to the ion separation membrane 108 during use and ensuring a more stable transmembrane barrier measurement experimental operating environment.In addition, since the long and flat cavity 112 of the first cell body 101 and the second cell body 102 can be completely filled without a lot of solution, a small amount of target solution can be provided in the internal cavity 112 of the first cell body 101 and the second cell body 102 to carry out a micro experiment. When using solutions with different ion concentrations to carry out transmembrane energy barrier measurement experiments, the amount of solution required is small, and a rapid experiment can be carried out to avoid solution waste. The device occupies a small volume, uses a small amount of solution, is easy to operate, and has a good use effect.

[0023] In this embodiment, the fluid in the microfluidic plate is discharged through multiple microflow ports, and the solution self-circulates in the cavities of the first cell body and the second cell body, driving the uniform flow of solution in the first cell body and the second cell body. The first cell body and the second cell body are both plate-shaped, and the microfluidic plate is matched and installed on their inner walls. The overall volume of the first cell body and the second cell body is small, and can be completely filled without much solution. A small amount of target solution can be provided to carry out micro experiments. When using solutions with different ion concentrations to carry out membrane mass transfer characterization experiments, a small amount of solution is required, which avoids solution waste, significantly reduces the influence of concentration polarization, improves test accuracy, and avoids problems such as membrane deformation caused by uneven pressure distribution on both sides of the membrane.

[0024] As a further solution of the present invention: a collecting chamber 111 is respectively opened at the bottom end of the first cell body 101 and the second cell body 102, and the collecting chamber 111 is connected to the cavity 112 inside the first cell body 101 and the second cell body 102. The solution is gathered at the bottom end by the collecting chamber 111 opened at the bottom end of the first cell body 101 and the second cell body 102, which facilitates the stable introduction of the fluid into the microfluidic pump body 106 and prevents the microfluidic pump body 106 from inhaling bubbles.

[0025] As a further solution of the present invention: multiple microfluidic channels 104 are evenly distributed inside the microfluidic plate 103, and multiple microflow ports 113 are evenly distributed on the microfluidic channels 104. Through the multiple evenly distributed microfluidic channels 104 and microflow ports 113 inside the microfluidic plate 103, the exported ion solution is evenly distributed, and then the fluids on both sides flow evenly, avoiding uneven force on the ion separation membrane 108.

[0026] As a further solution of the present invention: more than one placement groove 202 is opened on the upper end of the cover body 201, and the more than one placement groove 202 is arranged on the same straight line. More than one electrode body 203 can be placed in the more than one placement groove 202 on the cover body 201. By connecting multiple electrode bodies 203, a two-electrode system or a three-electrode system is formed in the ion solution in the first cell body 101 and the second cell body 102, and experiments are carried out to measure membrane potential, membrane resistance, membrane capacitance, salt transmembrane energy barrier, film zeta potential, ion migration number, membrane conductivity, membrane thickness, and ion transmembrane energy barrier under different ion concentrations.

[0027] Embodiment 2: See also Figure 1-Figure 6 The present invention also includes a heating component 3, which includes an outer shell 301. A solution cavity 302 is opened inside the outer shell 301. The solution cavity 302 is filled with a water bath solution. The separation component 1 is arranged in the outer shell 301. A heating plate 303 is connected to one side of the outer shell 301. The heating plate 303 heats the water bath solution.

[0028] A water bath solution is placed in the solution cavity 302 inside the outer shell 301, and the separation component 1 is arranged in the outer shell 301. The water bath solution in the outer shell 301 is temperature-controlled and heated at a constant temperature by the heating plate 303. The water bath solution heats the separation component 1 in a water bath, thereby allowing the separation component 1 to perform transmembrane barrier measurement experiments at different temperatures.

[0029] As a further solution of the present invention: the inner wall of the outer shell 301 is connected to multiple groups of water pumps 304, and the multiple groups of water pumps 304 are arranged around the separation component 1. The multiple groups of water pumps 304 connected to one end of the outer shell 301 drive the water bath solution to allow the water bath solution to flow in a directional manner toward the separation component 1, thereby performing more uniform water bath heating on the separation component 1.

[0030] As a further solution of the present invention: the outer walls of the first pool body 101 and the second pool body 102 are connected to multiple groups of isolation plates 109, and the isolation plates 109 are fitted and connected to the inner wall of the outer shell 301. The outer walls of the first pool body 101 and the second pool body 102 are connected to multiple groups of isolation plates 109 and the inner wall of the outer shell 301 to form a uniform water bath fluid flow channel, and the channel guides the water bath fluid to contact the outer walls of the first pool body 101 and the second pool body 102 and flow in a directional manner for water bath heating, so that the heating is uniform and rapid, and the water bath heating effect is good.

[0031] As a further solution of the present invention: multiple groups of isolation plates 109 are arranged in parallel and equidistantly, and the multiple groups of isolation plates 109 are arranged in parallel with multiple microfluidic channels 104. The multiple groups of equidistant and parallel isolation plates 109 allow the water bath fluid to circulate evenly. After the outer walls of the first cell body 101 and the second cell body 102 are heat exchanged, the solutions inside the multiple microfluidic channels 104 circulate and exchange heat. The microfluidic channels 104 drive the solutions inside the first cell body 101 and the second cell body 102 to circulate, allowing the solution inside the cavity 112 to circulate heat exchange with the outer walls of the first cell body 101 and the second cell body 102, so that the solutions inside the first cell body 101 and the second cell body 102 can be quickly kept at a constant temperature in a water bath, which is beneficial to rapid experiments and convenient to use and operate.

[0032] As a further solution of the present invention: a reflux groove 110 is provided at the bottom of the first cell body 101 and the second cell body 102, and the cross-section of the reflux groove 110 is U-shaped. The reflux grooves 110 evenly provided at the bottom of the first cell body 101 and the second cell body 102 can facilitate the water bath solution to quickly reflux through the reflux grooves 110 at the bottom of the first cell body 101 and the second cell body 102 after directional flow, thereby forming a circulation of the overall water bath solution, and the internal water bath solution circulation is stable.

[0033] An ion separation membrane separation method comprises the following steps: S1, introducing the prepared first solution into the first cell body 101, and introducing the prepared second solution into the second cell body 102; S2, turning on the electrochemical workstation, connecting the electrode body 203 in the first cell body 101 and the electrode body 203 in the second cell body 102 to a power source, and forming a voltage difference between the first cell body 101 and the second cell body 102; S3, select the measurement mode of the electrochemical workstation, set the stable temperature of the heating component, measure the membrane potential, membrane resistance, membrane capacitance, and salt transmembrane energy barrier of the ion separation membrane at different temperatures, and record them; S4, further deriving and calculating the data obtained in step S3, obtaining the film zeta potential, ion migration number, membrane conductivity, membrane thickness, and ion transmembrane energy barrier of the ion separation membrane, and recording them; S5. Change the type of salt solution inside the first cell body and the second cell body, repeat steps S2-S4, obtain the membrane potential, membrane resistance, membrane capacitance, salt transmembrane energy barrier, film zeta potential, ion migration number, membrane conductance, membrane thickness, ion transmembrane energy barrier under different salt solutions, and record them.

[0034] The working principle of the present invention is as follows: a solution to be measured is placed in a cavity 112 inside a first cell body 101 and a second cell body 102, the cavities 112 of the first cell body 101 and the second cell body 102 are connected, a membrane frame 107 is arranged between the cavities 112 of the first cell body 101 and the second cell body 102, an ion separation membrane 108 is installed inside the membrane frame 107, the ion separation membrane 108 is fixed by the membrane frame 107, and is installed in the middle of the cavity 112 of the first cell body 101 and the second cell body 102, and ion selective separation is performed, and the inner walls of the first cell body 101 and the second cell body 102 are connected to the microfluidic plate 103 A plurality of transverse microfluidic channels 104 and microfluidic ports 113 are provided inside the microfluidic plate 103. The microfluidic plate 103 is connected to a liquid supply tube 105. The liquid supply tube 105 supplies liquid through a microfluidic pump body 106. The microfluidic pump body 106 introduces the solution inside the cavity 112 of the first cell body 101 and the second cell body 102 into the liquid supply tube 105. The fluid in the liquid supply tube 105 is pressurized and introduced into the microfluidic plate 103. The fluid in the plurality of microfluidic plates 103 is discharged through the plurality of microfluidic ports 113. The solution self-circulates in the internal cavity 112 of the first cell body 101 and the second cell body 102, driving the solution in the first cell body 101 and the second cell body 102 to flow evenly. The ion solution is pressurized and stirred in the microfluidic pump body 106, and is stirred twice in the liquid supply pipe 105, and is stirred three times in the multiple microfluidic channels 104. After being led out of the multiple microfluidic ports 113, the flowing fluid is mixed with the fluid in the cavity 112, so as to achieve uniform stirring of the fluid inside the first cell body 101 and the second cell body 102, and ensure uniform ion distribution inside the ion solution. The power supply component 2 supplies power to the device, the cover body 201 is snapped on the openings of the first cell body 101 and the second cell body 102, the placement groove 202 of the cover body 201 is used to install the electrode body 203, and the power supply line 204 on the electrode body 203 is connected to the electrochemical workstation, and different power supply modes are provided by the electrochemical workstation to provide different voltages inside the cavity 112 of the first cell body 101 and the second cell body 102, and the transmembrane barrier measurement experiment under different ion concentrations is carried out.The first cell body 101 and the second cell body 102 are both plate-shaped, and the microfluidic plate 103 is matched and installed on the inner wall thereof. The overall volume of the first cell body 101 and the second cell body 102 is small. The interior of the cavity 112 of the first cell body 101 and the second cell body 102 drives the solution to stir and disturb through the multiple microfluidic channels 104 inside the microfluidic plate 103. The microfluidic plate 103 on the inner wall of the first cell body 101 and the microfluidic plate 103 on the inner wall of the second cell body 102 guide the uniformly swirling solution to flow toward the ion separation membrane 108, so that both sides of the ion separation membrane 108 The force is evenly distributed, which avoids deformation of the ion separation membrane 108 during use, and provides a more stable transmembrane barrier measurement experimental operating environment. In addition, since the long and flat cavity 112 of the first cell body 101 and the second cell body 102 can be completely filled without a lot of solution, a small amount of target solution can be provided in the first cell body 101 and the second cell body 102 The internal cavity 112 can be used for micro-experiments. When using solutions with different ion concentrations to perform transmembrane barrier measurement experiments, the amount of solution required is small, and rapid experiments can be performed to avoid solution waste. The device occupies a small volume, uses a small amount of solution, is easy to operate, and has a good use effect.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An ion selective separation membrane characterization and analysis device, characterized in that: Including separation components and power supply components: The separation assembly includes a first cell body and a second cell body, wherein the first cell body and the second cell body are both provided with cavities, the cavities of the first cell body and the second cell body are connected, a membrane frame is clamped and installed in the middle of the first cell body and the second cell body, an ion separation membrane is installed in the membrane frame, and the inner walls of the first cell body and the second cell body relative to the ion separation membrane are both connected with microfluidic plates, a plurality of microfluidic channels are provided inside the microfluidic plates, a plurality of microfluidic ports are provided on the microfluidic plates, the microfluidic channels are connected with a plurality of microfluidic ports, a plurality of the microfluidic channels are connected with a liquid supply pipe, a microfluidic pump body is connected to the bottom end of the liquid supply pipe, and the microfluidic pump body is embedded and connected to the inner wall of the first cell body and the inner wall of the second cell body; The power supply assembly includes a cover body and an electrode body, the cover body is snapped onto the upper open ends of the first cell body and the second cell body, the cover body is provided with a placement groove, the electrode body is snapped into place in the placement groove, the upper end of the electrode body is connected to a power supply line, the power supply line is electrically connected to the electrochemical workstation, and the microfluidic pump body introduces the solution inside the cavity of the first cell body and the second cell body into the liquid supply pipe.

2. The ion selective separation membrane characterization and analysis device according to claim 1, characterized in that: A collecting cavity is respectively provided at the bottom of the first cell body and the bottom of the second cell body.

3. The ion selective separation membrane characterization and analysis device according to claim 1, characterized in that: The plurality of microfluidic channels inside the microfluidic plate are distributed at equal intervals, and the plurality of microfluidic ports are distributed at equal intervals on the microfluidic channels.

4. The ion selective separation membrane characterization and analysis device according to claim 1, characterized in that: The cover body has more than one placement groove at the upper end, and the more than one placement grooves are arranged on the same straight line.

5. The ion selective separation membrane characterization and analysis device according to claim 1, characterized in that: It also includes a heating component, which includes an outer shell, a solution cavity is opened inside the outer shell, and the solution cavity is filled with a water bath solution. The separation component is arranged in the outer shell, and a heating plate is connected to one side of the outer shell, and the heating plate heats the water bath solution.

6. The ion selective separation membrane characterization and analysis device according to claim 5, characterized in that: The inner wall of the outer shell is connected to a plurality of water pumps, and the plurality of water pumps are arranged around the separation assembly.

7. An ion selective separation membrane characterization and analysis device according to claim 6, characterized in that: The outer walls of the first cell body and the second cell body are connected to a plurality of isolation plates, and the isolation plates are closely connected to the inner wall of the outer shell.

8. The ion selective separation membrane characterization and analysis device according to claim 7, characterized in that: The plurality of groups of isolation plates are arranged in parallel and equidistantly, and the plurality of groups of isolation plates are arranged in parallel with the plurality of microfluidic channels.

9. The ion selective separation membrane characterization and analysis device according to claim 8, characterized in that: The bottom ends of the first tank body and the second tank body are both provided with a reflux groove, and the cross section of the reflux groove is U-shaped.

10. A method for characterizing and analyzing an ion separation membrane, characterized in that: Applied to the ion selective separation membrane characterization and analysis device as claimed in any one of claims 1 to 9, the method comprises the following steps: S1, introducing the prepared first solution into the first cell body, and introducing the prepared second solution into the second cell body; S2, turning on the electrochemical workstation, connecting the electrode body in the first cell body and the electrode body in the second cell body to a power source, and forming a voltage difference between the first cell body and the second cell body; S3, select the measurement mode of the electrochemical workstation, set the stable temperature of the heating component, measure the membrane potential, membrane resistance, membrane capacitance, and salt transmembrane energy barrier of the ion separation membrane at different temperatures, and record them; S4, further deriving and calculating the data obtained in step S3, obtaining the film zeta potential, ion migration number, membrane conductivity, membrane thickness, and ion transmembrane energy barrier of the ion separation membrane, and recording them; S4. Change the type of salt solution inside the first cell body and the second cell body, repeat steps S2-S4, obtain the membrane potential, membrane resistance, membrane capacitance, salt transmembrane energy barrier, film zeta potential, ion migration number, membrane conductance, membrane thickness, ion transmembrane energy barrier under different salt solutions, and record them.

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