CN116988102A - Nano transport alkaline electrolyzed water diaphragm and manufacturing method thereof - Google Patents

Abstract

The invention provides a nano-transport alkaline electrolyzed water separator and a manufacturing method. In the manufactured nano-transported alkaline electrolyzed water separator, the surface hydrophilic polyphenylene sulfide (PPS) particles are flat, and the PPS particles are Partial or complete adhesion is formed between the PPS particles. The surface of the PPS particles is coated by bentonite particles and hydrophilic inorganic powder particles, and is entangled with fibrous polytetrafluoroethylene to form a continuous film; the interface and gaps of the PPS particles are covered by bentonite particles, The inorganic powder is filled to form a nanoscale transport channel, and the fibrous polytetrafluoroethylene entangles the PPS particles and the inorganic powder particles together. The addition of bentonite in the present invention improves the winding and fixation of fibrous polytetrafluoroethylene to PPS and inorganic powder, and improves the mechanical strength of the membrane material; the two hot rolling operations improve the gas barrier effect of the PPS separator, and the surface of the PPS undergoes inorganic After modification and compaction of the powder, nanoscale OH ^- ion transport channels appear, with better OH-ion conductivity, high porosity, and high hydrophilicity.

Description

A kind of nano-transport alkaline electrolyzed water separator and manufacturing method

Technical field

The invention relates to a diaphragm and a manufacturing method of the diaphragm, and belongs to the field of new energy materials.

Background technique

Hydrogen energy refers to the chemical energy produced by the reaction of hydrogen and oxygen. The energy is released and turned into water. It will not have any adverse effects on the human living environment. It has zero pollution, high energy density, zero emissions, light weight, and abundant storage. and good combustion performance. It is widely used in transportation, industry, construction and other fields. There are three main hydrogen production technologies in my country: alkaline (AWE), proton exchange membrane (PEM) and solid oxide electrolyzed water (SOEC). The development and application of AWE technology are the most mature. Alkaline electrolysis water hydrogen production technology has attracted much attention due to its advantages such as low cost, long life and abundant material sources, and its suitability for large-scale hydrogen production. PEM water electrolysis technology is in its early stages, and the equipment cost for water electrolysis is still high. SOEC is still in the laboratory verification and small-scale demonstration stages. Alkaline water electrolysis hydrogen production technology has attracted much attention due to its advantages such as low cost, long life, abundant sources of materials, and its suitability for large-scale hydrogen production. However, in large-scale hydrogen production applications, the current density and energy efficiency of alkaline water electrolysis technology still need to be further improved to increase its equipment and power consumption costs, and separators and electrode materials, as key components, play a role that cannot be ignored. effect.

The performance of the separator used in alkaline electrolysis of water has a great impact on the power consumption of the electrolyzer and the purity of the hydrogen produced. The diaphragm used in the early days of alkaline electrolysis of water for hydrogen production was asbestos. Initially, asbestos was widely used due to its porous characteristics. However, asbestos has poor resistance to high-temperature alkali corrosion and poor gas isolation capabilities, which poses an explosion risk and can harm the respiratory tract. Therefore, it is gradually replaced by other materials. However, the gas barrier effect of PPS non-woven fabrics still needs to be further improved to improve the purity of hydrogen. In recent years, a variety of materials have been studied in order to obtain separators with lower resistance and better hydrophilicity and gas barrier capabilities. More research has been done on organic polymers and their composite membranes, such as polysulfone membranes, polyether membranes, polytetrafluoroethylene membranes, PPS membranes, etc.

Contents of the invention

The invention provides a method for manufacturing a solid separator for alkaline electrolytic water. High-precision rolling improves the gas barrier effect of the PPS separator. After the PPS surface is modified and compacted by inorganic powder, it exhibits the transport of nanoscale ^OH- ions. channel, compared with traditional electrolytic water separators, it has better OH ^- ion conductivity, high porosity, and high hydrophilicity. The produced separator has thin thickness, small pore size, high mechanical properties, good dimensional stability, and lower cost. Low.

The object of the present invention is achieved through the following technical solutions:

A nano-transport alkaline electrolytic water separator, characterized in that the separator contains cross-linked polyphenylene sulfide particles with a hydrophilic surface, bentonite particles, hydrophilic inorganic powder, and fibrillated polytetrafluoroethylene. Vinyl fluoride, the polyphenylene sulfide particles are coated with bentonite particles and hydrophilic inorganic powder, and are entangled with fibrous polytetrafluoroethylene to form a continuous film; the polyphenylene sulfide particles are in the film It appears flat, and adjacent polyphenylene sulfide particles are partially or fully adhered. The interfaces and gaps between adjacent polyphenylene sulfide particles are filled with bentonite particles and hydrophilic inorganic powder to form a nano-scale transport channel.

Further, the thickness of the flat polyphenylene sulfide particles is 1-10 μm, and the extension length of the flat surface is 5-20 μm.

Further, the surface of the polyphenylene sulfide particles has hydrophilic functional groups, and the ends of the polyphenylene sulfide molecular chains are in a cross-linked state. The hydrophilic functional groups are polyether functional groups or chlorocatechol functional groups. Preferably, the The polyether functional group is preferably allyl polyether. Preferably, the chlorocatechol functional group is 2,5-dichlorohydroquinone, 2,3,5,6-tetrachlorophenol, 3,4,5- One or more of trichlorocatechol, tetrachlorohydroquinone, and 3,4,6-trichlorocatechol.

Further, the hydrophilic inorganic powder is one or a mixture of one or more of BaSO ₄ and ZrO _2. Preferably, the particle size of the inorganic powder is 10 nm-4 μm.

Furthermore, the fiberized polytetrafluoroethylene (PTFE) exhibits a linear long-chain drawing structure. The C-F bond ends of the PTFE form dipole adsorption with the metal bonds in the bentonite particles, and the PPS is firmly entangled and fixed. Granules and inorganic powder particles.

Further, the bentonite particles have a particle size of 10 nm-4 μm; preferably, they are one or a mixture of sodium bentonite, calcium bentonite, montmorillonite powder, and vermiculite powder.

The manufacturing method of the nano-transport alkaline electrolytic water separator is characterized in that it includes the following steps:

(1) Mixed powder:

Mix the surface hydrophilized cross-linked polyphenylene sulfide powder, hydrophilic inorganic powder, bentonite powder and polytetrafluoroethylene (PTFE) powder in an environment of <5°C to prepare powder A; The surface hydrophilization treatment of the cross-linked polyphenylene sulfide powder is to form hydrophilic functional groups on the surface of the cross-linked PPS;

(2) Fibrosis:

Pour powder A into a high-speed shear or airflow mill and fiberize to powder B. During the fiberization process, the molecular chain of polytetrafluoroethylene is extended and opened, which is the same as the polyphenylene sulfide powder and hydrophilic inorganic powder. , Bentonite powder forms physical adhesion and does not undergo chemical reaction;

(3) Secret refining:

After cooling the fibrous powder B to room temperature, pour it into an internal mixer, spray alcohol, and perform internal mixing to finally obtain pellet C;

(4) Film making:

Pour the pellets C evenly into the feeding system of the high-precision hot roller press, and perform initial rolling to extrude the continuous film D into strips. Then pour the film D into the high-speed chopper to obtain the chopped powder. E. Pour the powder E into the feeding system of the hot roller press and perform secondary rolling to obtain the membrane material F. Then heat-press the PPS mesh and membrane material F in the hot-press composite machine to composite the separator H. After winding and drying, the finished separator I is obtained.

Further, the cross-linked polyphenylene sulfide powder with surface hydrophilization treatment is a hydrophilic polyphenylene sulfide particle modified on the surface through hydrothermal reaction with polyether or chlorocatechol. Ether functional group or chlorocatechol functional group; the polyether is preferably allyl polyether, and the chlorocatechol is preferably 2,5-dichlorohydroquinone, 2,3,5,6-tetrachlorophenol, One or more of 3,4,5-trichlorocatechol, tetrachlorohydroquinone, and 3,4,6-trichlorocatechol.

Further, the weight percentage of the surface hydrophilized cross-linked polyphenylene sulfide powder, hydrophilic inorganic powder, bentonite powder and polytetrafluoroethylene powder is 20%-80%: 20 %-80%: 1%-5% and 1-10%.

Furthermore, during the internal mixing process, the alcohol sprayed is preferably one or a mixture of ethanol, ethylene glycol, and 1,2-propanediol; preferably, the weight percentage of the solid liquid after mixing is 5%. -50%; the internal mixing time is 10 minutes to 300 minutes; preferably, the size of the granular material C after internal mixing is 100 μm-3mm.

Further, during the film making process, the roller surface temperature of the roller press for one-time lamination is 50°C-130°C, the thickness of the one-time lamination D is 50-300 μm, and the size of the chopped powder E is 100 μm- 3mm, the roller surface temperature of the secondary lamination roller press is 50℃-130℃, the thickness of the secondary lamination F is 50-300μm, the PPS mesh is 10-100 mesh and the thickness is 100-300μm, film material F Composite with PPS mesh on one side or both sides, the thickness of the composite separator H is 150-400 μm.

The manufacturing method of the alkaline electrolytic water separator of the present invention uses cross-linked polyphenylene sulfide particles with hydrophilic surfaces, bentonite particles, hydrophilic inorganic powder and polytetrafluoroethylene as raw materials. After fiberization in the cutting machine or airflow mill, the molecular chain of polytetrafluoroethylene is extended and opened, forming physical adhesion with the polyphenylene sulfide powder, hydrophilic inorganic powder, and bentonite powder, and the fibrous polytetrafluoroethylene The molecular chains wrap and entangle the polyphenylene sulfide powder, hydrophilic inorganic powder, and bentonite powder; at the same time, the C-F bond ends of the polytetrafluoroethylene form dipole adsorption with the metal bonds in the bentonite particles, making the polytetrafluoroethylene The entanglement with PPS particles and inorganic powder particles is stronger. In the film forming process, a two-pass lamination process is adopted. After the first hot-pressing film is formed, the film material is all cut into fine particles, which can eliminate the hot-rolling texture that appears in the first pass of lamination. The width direction of the film material The strength is low. After the second hot-pressing process, the strength of the membrane material is increased in all directions, without perforation and crack defects. The two hot-rolling processes improve the gas barrier effect of the PPS separator.

In summary, the structural stability and strength of the separator of the present invention are guaranteed by four points. ① The addition of bentonite enhances the strength of the PTFE entangled network, making the membrane structure more stable in hot alkali aqueous solution; ② Cross-linked PPS The powders are bonded and hot-pressed to form a film, which further improves the structural stability of the membrane in hot alkali; ③ The separator adopts a two-pass lamination process during the manufacturing process. The strength of the membrane in all directions after hot-pressing is Both are improved, without perforation and crack defects. The two hot rolling processes improve the gas barrier effect of the PPS separator; ④ The membrane material is combined with the high-strength PPS mesh to once again improve the strength of the membrane material and ensure the long-term performance of the membrane material. service.

In the nano-transport alkaline electrolyzed water separator prepared by the present invention, after the PPS surface is modified and compacted by inorganic powder, it presents a nano-scale OH-ion transport channel, which has better performance than the traditional electrolyzed water separator. OH-ion conductivity, high porosity, and high hydrophilicity make the separator thin in thickness, small in pore size, high in mechanical properties, good in dimensional stability, and lower in cost.

Description of drawings

Figure 1 is a schematic structural diagram of the nanometer transport alkaline electrolytic water separator according to the present invention.

Figure 2DFT calculation shows that the C-F bond ends of PTFE form dipolar adsorption with the metal bonds in the bentonite particles.

Figure 3: Multi-chain ball structure formed by PTFE and bentonite particles.

Figure 4 Appearance of the nano-transport alkaline electrolyzed water separator product.

Figure 5 FIB-SEM image of the nano-transporting alkaline electrolytic water separator.

Figure 6 is a comparison diagram of the lower H cell electrolyzed water LSV with a nano-transport alkaline electrolyzed water separator and without a membrane in Embodiment 1;

Figure 7 is a comparative diagram of the EIS of the lower H cell electrolyzed water with a nano-transport alkaline electrolyzed water separator and without a membrane in Embodiment 1.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Embodiments. Elements and features described in one embodiment of the invention may be combined with elements and features illustrated in one or more other embodiments. It should be noted that for purposes of clarity, representation and description of components and processes known to those of ordinary skill in the art that are not relevant to the present invention have been omitted from the description. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without any creative effort fall within the scope of protection of the present invention.

The nano-transport alkaline electrolytic water separator of the present invention includes cross-linked polyphenylene sulfide particles with a hydrophilic surface, bentonite particles, hydrophilic inorganic powder, and fibrillated polytetrafluoroethylene. Polyphenylene sulfide particles are coated with bentonite particles and hydrophilic inorganic powder, and are entangled with fibrous polytetrafluoroethylene to form a continuous film, as shown in Figure 1. The polyphenylene sulfide particles are flat in the film, and adjacent polyphenylene sulfide particles are partially or fully adhered. The interfaces and gaps between adjacent polyphenylene sulfide particles are formed by bentonite particles and hydrophilic particles. It is filled with organic inorganic powder to form a nanoscale transport channel.

The thickness of the flat polyphenylene sulfide particles is 1-10 μm, and the extension length of the flat surface is 5-20 μm. The surface of the polyphenylene sulfide particles has hydrophilic functional groups, and the ends of the polyphenylene sulfide molecular chains are in a cross-linked state. The hydrophilic inorganic powder is one or a mixture of one or more of BaSO ₄ and ZrO _2. Preferably, the particle size of the inorganic powder is 10 nm-4 μm. The fiberized polytetrafluoroethylene (PTFE) exhibits a linear long-chain drawing structure. The CF bond ends of the PTFE form dipolar adsorption with the metal bonds in the bentonite particles, as shown in Figure 2, forming multi-chain balls. The structure, as shown in Figure 3, is firmly entangled to fix PPS particles and inorganic powder particles. The particle diameter of the bentonite particles is 10 nm-4 μm; preferably, it is one or a mixture of sodium bentonite, calcium bentonite, montmorillonite powder, and vermiculite powder.

Example 1:

Preparation of nano-transport alkaline electrolytic water separator: Use 2,5-dichlorohydroquinone to hydrophilize the surface of cross-linked polyphenylene sulfide powder, and weigh 40g of the cross-linked polyphenylene sulfide powder. Combined polyphenylene sulfide, 50g barium sulfate, 9g polytetrafluoroethylene and 1g montmorillonite powder were mixed at 1°C to obtain powder A. Powder A was put into a high-speed shear for fiberization. After completion of the reaction, powder B is obtained. Refrigerate powder B. After cooling to room temperature, put it into an internal mixer for kneading. Add 17g of 1,2-propanediol and mix for 60 minutes to obtain pellet C with a particle size of 1 mm. Pour the granules C into the feeding system of the high-precision hot roller press. The temperature of the roller press is 100°C to obtain a continuous film D with a thickness of 150 μm. Put the continuous film D into a chopper and crush it to obtain particles. Particle E with a size of 1mm, and then pour the powder E into the high-precision hot roller press feeding system to obtain a membrane material F with a thickness of 200 μm, and then combine the membrane material F with a PPS mesh with a pore diameter of 40 mesh and a thickness of 250 μm. The thickness of the finished separator H is 275 μm after compounding in a thermal laminating machine. After the separator H is dried, the product is shown in Figure 4, that is, the separator I is characterized.

The separator I prepared in this embodiment is a nano-transport alkaline electrolytic water separator. Its structure is shown in the FIB-SEM shown in Figure 5. The polyphenylene sulfide (PPS) particles appear flat under the action of roller pressing. The length of the PPS particles is 20 μm and the width is 4 μm. Adhesion is formed between the PPS particles. The surface of the PPS particles is coated with 1 μm inorganic powder particles. The interfaces and gaps are filled with inorganic powder to form nanoscale transport channels and fibrosis. PTFE entangles PPS particles and inorganic powder particles together. Polytetrafluoroethylene and 1μm bentonite powder form a multi-chain ball structure, which further entangles and fixes PPS particles and inorganic powder particles firmly.

Experimental materials: 30% KOH solution, anode platinum electrode, cathode as catalyst, separator I, H-shaped conductivity cell.

Experimental method: The electrochemical workstation was used to test the AC impedance (EIS) to obtain the internal resistance and the linear sweep voltammetry (LSV) to obtain the current. The separators I tested were all dried. Set the EIS frequency range to 0.1~10000HZ, LSV voltage range 0~2V, and scan rate 0.005V/S.

The experimental results are shown in Figures 6 and 7. First, a film-free test was performed. The internal resistance at 2KHZ without a film was 5.309Ω, and the current without a film was 35.074mA. The diaphragm I was placed in the middle of the conductivity cell and tested. resistance and current. The internal resistance at 2KHZ is 5.895Ω, and the current is 32.854mA. According to the diaphragm area being 1.766cm ² , the surface resistance is calculated to be 1.034Ω*cm ² . After soaking the diaphragm I in alkali solution for 2 hours, the internal resistance at 2KHZ was measured to be 5.613Ω, the current was 35.719mA, and the surface resistance was calculated to be 0.53Ω*cm ² . Then put the diaphragm I into the alkali solution and soak it for 24 hours. The internal resistance at 2KHZ was 4.944Ω without the membrane, and the current without the membrane was 34.596mA. Place the diaphragm I in the middle of the conductivity cell to test its internal resistance. and current. The internal resistance at 2KHZ is 5.192Ω, and the current is 33.866mA. The surface resistance is calculated to be 0.43Ω*cm ² .

Example 2:

Weigh 50g of allyl polyether hydrothermally treated cross-linked polyphenylene sulfide powder, 40g of zirconium dioxide, 9g of polytetrafluoroethylene and 1g of montmorillonite powder and mix them at 1°C to obtain powder A. A is put into a high-speed shear for fiberization. After the fiberization is completed, powder B is obtained. Refrigerate powder B. After cooling to room temperature, put it into an internal mixer for kneading. Add 17g of 1,2-propanediol and mix for 60 minutes. , obtain pellet C with a particle size of 1mm, pour pellet C into the high-precision hot roller press feeding system, the temperature of the roller press is 100°C, and obtain a strip continuous film D with a thickness of 150 μm, and put the strip continuous film D Put it into a chopper and crush it to obtain pellets E with a particle size of 1 mm. Then pour the powder E into the high-precision hot roller press feeding system to obtain a film material F with a thickness of 200 μm. Then put the film material F It was compounded with a 40-mesh 250μm PPS mesh in a thermal laminating machine to produce a finished separator H with a thickness of 267m. After that, the separator H was dried and the separator I was characterized.

Experimental materials: 30% KOH solution, anode platinum electrode, cathode as catalyst, separator I, H-shaped conductivity cell.

Experimental method: The electrochemical workstation was used to test the AC impedance (EIS) to obtain the internal resistance and the linear sweep voltammetry (LSV) to obtain the current. The separators I tested were all dried. Set the EIS frequency range to 0.1~10000HZ, LSV voltage range 0~2V, and scan rate 0.005V/S.

First, conduct a test without a film. The internal resistance at 2KHZ without a film is 5.107Ω, and the current without a film is 29.18mA. Place the diaphragm I in the middle of the conductivity cell to test its internal resistance and current. The internal resistance at 2KHZ is 6.378Ω, and the current is 24.892mA. According to the diaphragm area being 1.766cm ² , the surface resistance is calculated to be 2.24Ω*cm ² .

Example 3:

Weigh 40g of 3,4,5-trichlorocatechol hydrothermally treated cross-linked polyphenylene sulfide powder, 50g of barium sulfate, 9g of polytetrafluoroethylene and 1g of montmorillonite powder and mix them at 1°C to obtain a powder Material A, put powder A into a high-speed shear for fiberization. After fiberization is completed, powder B is obtained. Refrigerate powder B. After cooling to room temperature, put it into an internal mixer for kneading. Add 17g of 1,2- Propylene glycol, mix for 60 minutes to obtain pellet C with a particle size of 1 mm. Pour pellet C into the high-precision hot roller press feeding system. The temperature of the roller press is 100°C to obtain a continuous film D with a thickness of 150 μm. , put the continuous film D into a chopper and crush it to obtain pellets E with a particle size of 1mm. Then pour the powder E into the high-precision hot roller press feeding system to obtain a film material F with a thickness of 200 μm. , and then composite the membrane material F with a 40-mesh 250 μm PPS mesh in a thermal laminating machine to form a finished separator H with a thickness of 262 μm. After that, the separator H is dried, that is, the separator I is characterized.

Experimental materials: 30% KOH solution, anode platinum electrode, cathode as catalyst, separator I, H-shaped conductivity cell.

Experimental method: The electrochemical workstation was used to test the AC impedance (EIS) to obtain the internal resistance and the linear sweep voltammetry (LSV) to obtain the current. The separators I tested were all dried. Set the EIS frequency range to 0.1~10000HZ, LSV voltage range 0~2V, and scan rate 0.005V/S.

First, conduct a test without a membrane, and find that the internal resistance at 2KHZ without a membrane is 4.7Ω, and the current without a membrane is 30.56mA. Place the diaphragm I in the middle of the conductivity cell to test its internal resistance and current. The internal resistance at 2KHZ is 4.9Ω and the current is 30.05mA. According to the diaphragm area being 1.766cm ² , the surface resistance is calculated to be 0.43Ω*cm ² .

Example 4:

Weigh 50g of 3,4,5-trichlorocatechol hydrothermally treated cross-linked polyphenylene sulfide powder, 40g of barium sulfate, 9g of polytetrafluoroethylene and 1g of montmorillonite powder and mix them at 1°C to obtain a powder Material A, put powder A into a high-speed shear for fiberization. After fiberization is completed, powder B is obtained. Refrigerate powder B. After cooling to room temperature, put it into an internal mixer for kneading. Add 17g of 1,2- Propylene glycol, mix for 60 minutes to obtain pellet C with a particle size of 1 mm. Pour pellet C into the high-precision hot roller press feeding system. The temperature of the roller press is 100°C to obtain a continuous film D with a thickness of 150 μm. , put the continuous film D into a chopper and crush it to obtain pellets E with a particle size of 1mm. Then pour the powder E into the high-precision hot roller press feeding system to obtain a film material F with a thickness of 200 μm. , and then composite the membrane material F with the 40 mesh 250 μm PPS mesh in a thermal laminating machine to form the finished separator H with a thickness of 280 μm. After that, the separator H is dried, that is, the separator I is characterized.

Experimental materials: 30% KOH solution, anode platinum electrode, cathode as catalyst, separator I, H-shaped electrolytic cell.

Experimental method: The electrochemical workstation was used to test the AC impedance (EIS) to obtain the internal resistance and the linear sweep voltammetry (LSV) to obtain the current. The separators H tested were all dried. Set the EIS frequency range to 0.1~10000HZ, LSV voltage range 0~2V, and scan rate 0.005V/S.

First, conduct a test without a film, and find that the internal resistance at 2KHZ without a film is 4.995Ω, and the current without a film is 31.829mA. Place the diaphragm I in the middle of the conductivity cell to test its internal resistance and current. The internal resistance at 2KHZ is 5.886Ω, and the current is 26.83mA. According to the diaphragm area being 1.766cm ² , the surface resistance is calculated to be 1.57Ω*cm ² .

Although the present invention and its advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made without departing from the spirit and scope of the invention as defined by the appended claims. Furthermore, the scope of the present invention is not limited to the specific embodiments of the processes, equipment, means, methods and steps described in the specification. Those of ordinary skill in the art will readily understand from the disclosure of the present invention that existing and future devices that perform substantially the same functions or obtain substantially the same results as corresponding embodiments described herein may be used in accordance with the present invention. The process, equipment, means, method or procedure being developed. It is therefore intended that the appended claims include within their scope such processes, apparatus, means, methods or steps.

Claims (10)

1. The nano transport alkaline electrolyzed water diaphragm is characterized by comprising crosslinked polyphenylene sulfide particles, bentonite particles, hydrophilic inorganic powder and fibrillated polytetrafluoroethylene, wherein the surfaces of the crosslinked polyphenylene sulfide particles are hydrophilic, the surfaces of the crosslinked polyphenylene sulfide particles are coated by the bentonite particles and the hydrophilic inorganic powder, and the fibrillated polytetrafluoroethylene is entangled to form a continuous film; the polyphenylene sulfide particles are flat in the film, partial or complete adhesion is formed between adjacent polyphenylene sulfide particles, and the interfaces and gaps between the adjacent polyphenylene sulfide particles are filled with bentonite particles and hydrophilic inorganic powder to form a nanoscale conveying channel.

2. The nano-transport alkaline electrolyzed water membrane according to claim 1, wherein: the thickness of the flat polyphenylene sulfide particles is 1-10 mu m, and the extension length of the flat surfaces is 5-20 mu m.

3. The nano-transport alkaline electrolyzed water membrane according to claim 1, wherein: the surface of the polyphenylene sulfide particles is provided with a hydrophilic functional group, the tail end of a molecular chain of the polyphenylene sulfide is in a crosslinked state, the hydrophilic functional group is a polyether functional group or a chlorocatechol functional group, preferably, the polyether functional group is allyl polyether, preferably, the chlorocatechol functional group is one or more of 2, 5-dichloro hydroquinone, 2,3,5, 6-tetrachlorophenol, 3,4, 5-trichlorocatechol, tetrachlorohydroquinone and 3,4, 6-trichlorocatechol.

4. The nano-transport alkaline electrolyzed water membrane according to claim 1, wherein: the hydrophilic inorganic powder is BaSO ₄ ，ZrO ₂ Preferably, the particle size of the inorganic powder is 10nm-4 μm; the particle size of the bentonite particles is 10nm-4 mu m; preferably one or a mixture of sodium bentonite, calcium bentonite, montmorillonite powder and vermiculite powder.

5. The nano-transport alkaline electrolyzed water membrane according to claim 1, wherein: the fibrous Polytetrafluoroethylene (PTFE) has a linear long-chain wiredrawing structure, and the terminal of the C-F bond of the PTFE and a metal bond in bentonite particles form dipole adsorption, so that PPS particles and inorganic powder particles are firmly entangled and fixed.

6. The method for manufacturing a nano-sized transportation alkaline electrolyzed water membrane according to claim 1, comprising the steps of:

(1) Mixing powder:

mixing crosslinked polyphenylene sulfide powder with hydrophilized surface, hydrophilic inorganic powder, bentonite powder and Polytetrafluoroethylene (PTFE) powder at the temperature of <5 ℃ to prepare powder A; the surface hydrophilization treatment of the crosslinked polyphenylene sulfide powder is to form hydrophilic functional groups on the surface of the crosslinked PPS;

(2) Fibrosis:

pouring the powder A into a high-speed shearing machine or an air flow mill for fiberizing to obtain powder B, wherein the molecular chain of polytetrafluoroethylene is extended and opened in the fiberizing process, and the powder A, the polyphenylene sulfide powder, the hydrophilic inorganic powder and the bentonite powder form physical adhesion without chemical reaction;

(3) Banburying:

cooling the fiberized powder B to room temperature, pouring the cooled fiberized powder B into an internal mixer, spraying alcohol, and carrying out internal mixing to obtain granules C;

(4) And (3) film preparation:

uniformly pouring the granules C into a feeding system of a hot roller press, carrying out primary rolling, extruding to form a continuous film D, pouring the film D into a high-speed chopper to obtain chopped powder E, pouring the powder E into the feeding system of the hot roller press again, carrying out secondary rolling to obtain a film F, carrying out hot-pressing compounding on a PPS net and the film F in a hot-pressing compounding machine to form a diaphragm H, and carrying out rolling and drying to obtain a finished diaphragm I.

7. The method for manufacturing a nano-transport alkaline electrolyzed water membrane according to claim 6, wherein: the surface hydrophilized cross-linked polyphenylene sulfide powder is prepared by performing hydrothermal reaction on cross-linked polyphenylene sulfide particles and polyether or chlorocatechol, and modifying hydrophilic polyether functional groups or chlorocatechol functional groups on the surfaces; the polyether is preferably allyl polyether, and the chlorocatechol is preferably one or more of 2, 5-dichloro hydroquinone, 2,3,5, 6-tetrachlorophenol, 3,4, 5-trichlorocatechol, tetrachlorohydroquinone and 3,4, 6-trichlorocatechol.

8. The method for manufacturing a nano-transport alkaline electrolyzed water membrane according to claim 6, wherein: the surface hydrophilization treatment comprises the following components in percentage by weight: 20% -80%:1% -5% and 1-10%.

9. The method for manufacturing a nano-transport alkaline electrolyzed water membrane according to claim 6, wherein: in the banburying process, the sprayed alcohol is preferably one or more of ethanol, ethylene glycol and 1, 2-propylene glycol; preferably, the weight percentage of the solid and the liquid after mixing is 5% -50%; the banburying time is 10 minutes to 300 minutes; preferably, the size of the pellets C after banburying is 100 μm to 3mm.

10. The method for manufacturing a nano-transport alkaline electrolyzed water membrane according to claim 6, wherein: in the film preparation process, the roller surface temperature of a roller press for primary film pressing is 50-130 ℃, the thickness of a primary film pressing D is 50-300 mu m, the size of chopped powder E is 100-3 mm, the roller surface temperature of a roller press for secondary film pressing is 50-130 ℃, the thickness of a secondary film pressing F is 50-300 mu m, a PPS net is 10-100 meshes and the thickness is 100-300 mu m, the film material F and the PPS net are compounded on one side or two sides, and the thickness of a compounded finished product diaphragm H is 150-400 mu m.