Electrochemical polymerization device for deposition of conductive forward osmosis membrane base membrane
By using an electrochemical polymerization device in the preparation of conductive positive permeability films, deposition is performed using conductive porous substrates and cyclic voltammetry, the uniformity and stability of conductive materials are solved, and high-performance conductive base film deposition is achieved.
Patent Information
- Application Number
- CN202421406840.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-19
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-06-19
AI Technical Summary
Prior Art In the preparation of conductive positive permeability films, the uniformity and stability of the conductive material are insufficient, resulting in a decrease in the conductive performance of the composite film, and the high resistivity of the support layer affects the performance of the film.
Using an electrochemical polymerization device including working electrodes and auxiliary electrodes, the conductive porous substrate is used as the working electrodes, and deposition is carried out in the electrochemical polymerization solution by cyclic voltammetry, and the deposition uniformity and stability are ensured through magnetic stirrer and cooling device. sex.
The uniform deposition of the conductive base film is achieved, the conductivity and stability are improved, and the long-term use performance of the film is ensured.
Smart Images
Figure CN222182458U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of electrochemical polymerization technology, and more specifically, to an electrochemical polymerization device for depositing a conductive forward osmosis membrane base film. Background Art
[0002] Compared with the electrochemical coupling of non-conductive forward osmosis membrane and electrochemical coupling, the prepared conductive forward osmosis membrane is directly used as cathode or anode, which not only has the advantages of making the device compact and easy to handle and build, but also the feed liquid will greatly reduce the mass transfer resistance between pollutants and electrodes. The preparation of conductive forward osmosis membrane can be roughly divided into the following methods: through the conductive modification of the cortex. Most of the conductive modification of the cortex is to coat the polyamide layer with conductive materials for modification, but the biggest disadvantage of this coating method is that the uniformity is limited, which greatly weakens the conductive performance of the composite membrane. Another way is to modify the conductivity of the support layer by coating the support layer with conductive materials. However, this method of preparing the conductive layer by coating also faces fatal problems of uniformity and conductivity. For example, the existing Chinese patent CN112473372B proposes a method of depositing a two-dimensional material MXene on a polymer membrane support layer by vacuum filtration, and then preparing a conductive forward osmosis membrane by interfacial polymerization. However, the conductive base membrane obtained in this way is easy to lose its conductive material. In long-term operation, due to the loss of conductive additives, the membrane performance gradually decreases. In addition, the support layer is a non-conductive material with a relatively high resistivity, which also affects the performance of the membrane. Therefore, there is a need for an electrochemical polymerization device for depositing a conductive forward osmosis membrane base membrane that can stably deposit conductive materials on a forward osmosis base membrane and obtain a conductive base membrane with good conductivity and stability. Summary of the invention
[0003] In order to solve the above problems, the purpose of the present application is to provide an electrochemical polymerization device for depositing a conductive forward osmosis membrane base film, by which the deposited conductive base film has strong conductivity and stability.
[0004] To achieve the above-mentioned purpose, the present application provides an electrochemical polymerization device for deposition of a conductive forward osmosis membrane base membrane, comprising a working electrode, an auxiliary electrode and a reference electrode, wherein the working electrode is the base membrane to be electrochemically deposited, the auxiliary electrode comprises two, and its area is the same as that of the base membrane, and the working electrode is placed between the two auxiliary electrodes; the base membrane is a conductive porous substrate.
[0005] Furthermore, the auxiliary electrode is a titanium mesh having the same area as that of the base film.
[0006] Furthermore, the conductive porous base membrane is conductive porous carbon paper which has been neutralized.
[0007] Furthermore, the distance between the electrodes is 1.5 cm, and the four electrodes are completely immersed in the electrochemical polymerization solution.
[0008] Furthermore, it also includes an electrochemical reactor, in which the electrochemical polymerization solution is placed and placed on a stirrer.
[0009] Furthermore, the stirrer is a magnetic stirrer, and its stirring speed is 50RPM.
[0010] Furthermore, it also includes a cooling device, which is arranged around the electrochemical reactor.
[0011] Furthermore, the temperature of the electrochemical reactor is maintained at 2-10°C.
[0012] Furthermore, the reference electrode is a saturated calomel electrode (SCE).
[0013] Furthermore, the cooling device includes a stainless steel container in which a refrigerant is placed, and the electrochemical reactor is placed in a stainless steel container; the mode of electrochemical polymerization is cyclic voltammetry (CV); the voltage scanning range is -0.2-0.9V, the scanning rate is 0.05V / S, and the number of cycles can be set to 0, 200, 400, 500, 600 or 700.
[0014] The electrochemical polymerization device for depositing a conductive forward osmosis membrane base film provided in the present application can effectively and evenly deposit electrochemical polymers onto the base film by using the base film of a conductive porous substrate as a working electrode, and the resulting final conductive base film has strong conductivity and stability.
[0015] In addition, the present application can ensure that the concentration of the solution being deposited is uniform through the cooling device around the agitator and the reactor.
[0016] At the same time, the base film in the present application is a conductive porous carbon paper, which is used as a working electrode after being neutralized, so that the polymer deposition during deposition is more uniform and firmer. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0018] Figure 1 This is a schematic diagram of the structure of the electrochemical polymerization device used for conductive forward osmosis membrane base film deposition in this application. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0020] like Figure 1 As shown, the present application provides an electrochemical polymerization device for deposition of conductive forward osmosis membrane base film, including an electrochemical reactor 10, a working electrode 11 and auxiliary electrodes 12, 13, a reference electrode 14, an electrochemical workstation 20, and a central controller 50. Among them, the working electrode 11 is the base film to be electrochemically deposited, the area of the auxiliary electrodes 12, 13 is the same as the base film, and the working electrode 11 is placed between the two auxiliary electrodes 12, 13. The electrochemical workstation 20 monitors the electrochemical workstation and the results through a central controller 50 such as a personal computer to control and adjust the electrochemical workstation 20. The electrochemical workstation 20 adopts cyclic voltammetry (CV); the electrochemical workstation 20 controls and adjusts the output of appropriate voltage scans, scan rates and number of cycles to output corresponding control voltages, voltage scans, scan rates and number of cycles to each electrode, thereby achieving appropriate deposition on the working electrode 11 (base film).
[0021] The electrochemical reactor 10 is provided with an electrochemical polymer solution required for electrodeposition.
[0022] Further preferably, the distance between the electrodes is 1.5 cm, and the four electrodes are completely immersed in the electrochemical polymerization solution.
[0023] In a further embodiment, the base film is a conductive porous substrate, more preferably, the conductive porous substrate is a conductive porous carbon paper; further preferably, the conductive porous carbon paper is subjected to a neutral treatment.
[0024] In a further embodiment, the auxiliary electrodes 12 and 13 are titanium meshes having the same area as the base film.
[0025] In a further embodiment, the reference electrode 14 is a saturated calomel electrode (SCE).
[0026] In a further embodiment, the electrochemical reactor 10 is placed on a stirrer 30 .
[0027] In a further embodiment, the stirrer 30 is a magnetic stirrer with a stirring speed of 50 RPM. The electrochemical polymerization solution is stirred by the magnetic stirrer.
[0028] In a further embodiment, a temperature controller such as a cooling device (not shown) is also included, which is arranged around the electrochemical reactor 10 to maintain and control the temperature around the electrochemical reactor 10, thereby controlling the temperature of the electrochemical polymerization solution therein to not be too high or too low, and keeping the electrochemical polymer solution uniform.
[0029] In a further embodiment, the temperature of the electrochemical reactor 10 is maintained at 2-10°C; more preferably, maintained at 5°C.
[0030] In a further embodiment, the cooling device includes a stainless steel container and a refrigerant in the stainless steel; the electrochemical reactor 10 is located in the stainless steel container and is surrounded by the refrigerant.
[0031] In a further embodiment, the mode of electrochemical polymerization is cyclic voltammetry (CV); the voltage scan range is -0.2-0.9V, the scan rate is 0.05V / S, and the number of cycles can be set to 0, 200, 400, 500, 600 or 700.
[0032] The electrochemical polymerization device for conductive forward osmosis membrane base film deposition provided in the present application can effectively and evenly deposit electrochemical polymers onto the base film by using the conductive porous base film as the working electrode, and the resulting final conductive base film has strong conductivity and stability.
[0033] In addition, the present application can ensure that the concentration of the solution being deposited is uniform through the cooling effect of the temperature controller around the agitator and the reactor.
[0034] At the same time, the base film in the present application is a conductive porous carbon paper, which is used as a working electrode after being neutralized, so that the polymer deposition during deposition is more uniform and firmer.
[0035] Although some specific embodiments of the present application have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and are not intended to limit the scope of the present application. Those skilled in the art should understand that modifications to the technical solutions described in the above embodiments or equivalent replacements of some of the technical features therein without departing from the scope and spirit of the present application are all within the protection scope of the present application.
Claims
1. An electrochemical polymerization device for conductive forward osmosis membrane base film deposition, characterized in that: It includes a working electrode, an auxiliary electrode and a reference electrode, wherein the working electrode is a base membrane to be electrochemically deposited, the auxiliary electrodes include two, and their area is the same as that of the base membrane, and the working electrode is placed between the two auxiliary electrodes; the base membrane is a conductive porous substrate.
2. The electrochemical polymerization device for conductive forward osmosis membrane base film deposition according to claim 1, characterized in that: The auxiliary electrode is a titanium mesh with the same area as the base film.
3. The electrochemical polymerization device for conductive forward osmosis membrane base film deposition as claimed in claim 2, characterized in that: The base film is a conductive porous carbon paper which has been neutralized.
4. The electrochemical polymerization device for conductive forward osmosis membrane base film deposition as claimed in claim 3, characterized in that: The distance between the electrodes is 1.5 cm, and the four electrodes are completely immersed in the electrochemical polymerization solution.
5. The electrochemical polymerization device for conductive forward osmosis membrane base film deposition as claimed in claim 4, characterized in that: It also comprises an electrochemical reactor, in which the electrochemical polymerization solution is placed and the reactor is placed on a stirrer.
6. The electrochemical polymerization device for conductive forward osmosis membrane base film deposition according to claim 5, characterized in that: The stirrer is a magnetic stirrer, and its stirring speed is 50RPM.
7. The electrochemical polymerization device for conductive forward osmosis membrane base film deposition according to claim 6, characterized in that: The invention also comprises a cooling device which is arranged around the electrochemical reactor.
8. The electrochemical polymerization device for conductive forward osmosis membrane base film deposition according to claim 7, characterized in that: The temperature of the electrochemical reactor was maintained at 2-10°C.
9. The electrochemical polymerization device for conductive forward osmosis membrane base film deposition according to claim 8, characterized in that: The reference electrode is a saturated calomel electrode.
10. The electrochemical polymerization device for conductive forward osmosis membrane base film deposition according to claim 9, characterized in that: The cooling device includes a stainless steel container in which a refrigerant is placed, and the electrochemical reactor is placed in a stainless steel container; the mode of the electrochemical polymerization is cyclic voltammetry (CV); the voltage scanning range is -0.2-0.9V, the scanning rate is 0.05V / S, and the number of cycles can be set to 0, 200, 400, 500, 600 or 700.