KR101450832B1 - Hydrophilic metallic membranes and it's making method - Google Patents

Abstract

The present invention relates to a hydrophilic metal separation membrane and a method of manufacturing the same.
The method for producing a hydrophilicized metal separation membrane according to the present invention comprises the steps of preparing a dispersion by mixing an alloy particle powder of three and four period transition metals and a ceramic solvent with a polar solvent and adding a synthetic polymer to the dispersion to prepare a support layer solution Wow; Preparing an active layer solution using particles smaller than those used in the support layer solution, proceeding in the same manner as the step of preparing the support layer solution; Spinning the support layer solution and the active layer solution through a nozzle to remove solvent from the phase transition liquid to form a metal separation membrane precursor; Oxidizing the metal separator precursor; And sintering the oxidized metal separation membrane precursor.
The present invention relates to a method for producing a ceramic powder, which comprises adding a liquid ceramic sol to a powder of alloy particles having a microparticle size to obtain a uniform dispersion effect by chemical bonding between the alloy particle powder and a ceramic component, The alloy particles can be connected to each other to fill the voids between particles, thereby obtaining a metal separation membrane having excellent hydrophilicity, filling voids between the particles of the alloy particles and forming a water film in the exposed voids, And a pore size of 1 to 3 μm in the center support layer and a pore size of less than 1 μm in the active layer of the surface, so that finer and more precise water treatment is possible .

Description

[0001] Hydrophilic metallic membranes and it's making method [

The present invention relates to a metal separator and a method of manufacturing the same. More particularly, the present invention relates to a metal separator for uniformly dispersing a metal alloy particle powder having a fine particle and a ceramic component so as to uniformly coat the surface, The present invention relates to a hydrophilic metal separation membrane which can be used as a pretreatment filter in water treatment by reducing the pore size to 1 m or less.

The membranes have produced various synthetic membranes, starting with cellulose acetate, which was invented in the mid 19th century.

Membrane technology has been applied to the desalting of seawater using ion exchange membranes in the 1950s, and membrane materials have been steadily developed and fixed, and are now being applied in a wide range of industrial fields as well as water treatment processes.

Generally, separation membranes used in all industrial fields are physically separated, concentrated, purified and removed from a mixture of liquid-liquid, solid-liquid, and solid-gas phases.

The membrane filtration process is an efficient process that can be separated without phase change of the fluid depending on the physical and chemical properties of the membrane material, the size of the microstructure, the hydrophilicity of the solute, and the diffusibility.

The most widely used membrane for water treatment is ceramic membrane and polymer membrane. Most synthetic water treatment membranes require light and thin space. However, hydrophilic membranes are chemically treated and hydrophilized when they are used as water treatment membranes. Ceramic membranes are hydrophilic and have great durability in transporting water, but they are thick and easy to break and are limited to applications where they usually have a single-tube membrane.

On the other hand, it has become possible to manufacture a metal membrane in the form of a hollow fiber membrane by using a water treatment membrane capable of enhancing the durability of the membrane, and can be used in special fields.

The separation membrane using metal and ceramic powders has been proposed as a separation membrane using metal and ceramic powders (Korean Patent Registration No. 10-819418, Patent Document 1) And a method of preparing a separation membrane precursor by dissolving the alloy particle powder and the ceramic particle powder together with the polymer in a polar solvent at a predetermined ratio and then radiating or casting the dispersion particle to oxidize the synthetic polymer in the separation membrane precursor, And sintering in a hydrogen-mixed gas atmosphere.

In the above-described prior art, since the ceramic powder as the hydrophilic material is mixed with the powder of the metal alloy particles, the powder is not uniformly dispersed and the pure water permeability in the water treatment process is lower than that of the ceramic membrane. The dispersion of the particles is not uniform and the uniform pore distribution can not be obtained in the step of preparing the slurry, so that the reliability of the water treatment may be a problem.

KR 10-819418 (Mar. 28, 2008)

The hydrophilic metal separation membrane of the present invention and the method of manufacturing the same are intended to solve the problems caused by the conventional techniques as described above and uniformly dispersed by chemical bonding between the metal alloy particle powder having fine particles and the ceramic component having high hydrophilicity Thereby improving the efficiency of the water treatment process by increasing the pure water permeability.

More specifically, the metal alloy particles and the ceramic particles are uniformly bonded to the alloy particles of the three-period and four-period transition metals through the ion and the anion which is a hydroxyl group (hydroxyl group OH) in the cations and the ceramic sol, Thereby forming a void between the metal alloy particles by allowing the hydroxyl groups to be removed in the oxidation step of the precursor so that a uniform pore distribution is formed.

Particularly, a solution having a nano-sized metal powder is coated on the surface to form a support layer having a pore size of 1 to 3 탆 in the core portion and an active layer having a pore size of less than 1 탆 outside the support layer, So as to enable precise water treatment.

In order to solve the above problems, a method for manufacturing a hydrophilicized metal separation membrane according to the present invention comprises preparing a dispersion by mixing an alloy particle powder of three and four period transition metals and a ceramic solvent with a polar solvent, To produce a support layer solution; Preparing an active layer solution using particles smaller than those used in the support layer solution, proceeding in the same manner as the step of preparing the support layer solution; Spinning the support layer solution and the active layer solution through a nozzle to remove solvent from the phase transition liquid to form a metal separation membrane precursor; Oxidizing the metal separator precursor; And sintering the oxidized metal separation membrane precursor.

At this time, in the step of forming the metal separation membrane precursor, the support layer solution is made to be the core part and the active layer solution is sheath part, so that the sheath part is located outside the core part.

In addition, in the step of preparing the support layer solution, the alloy particle powders of the three-period and four-period transition metals have a particle size of 1 to 20 占 퐉. In the step of preparing the active layer solution, Is characterized by a particle size of 10 to 200 nm.

In addition, the alloy particle powders of the three-period and four-period transition metals are made of any one of stainless steel 304, stainless steel 316 and stainless steel 316L, and the ceramic sol is made of any one of alumina, silica and titania, Is characterized by being a polythersulfone system.

In addition, the dispersion is characterized by comprising 65 to 85% by weight of the alloy particle powder of the three-period and four-period transition metals, and 0.5 to 5% by weight of the ceramic sol, and is made of the remaining polar solvent.

In addition, the synthetic polymer is added in an amount of 5 to 15 parts by weight based on 100 parts by weight of the dispersion.

The hydrophilic metal separation membrane of the present invention is produced by the above production method and has a pore size of 3 μm or less. More specifically, the hydrophilic metal separation membrane is composed of a core portion at the center portion and a sheath portion outside the core portion. To 3 mu m, and the sheath portion is characterized in that the pore size is less than 1 mu m.

The present invention relates to a method for producing a ceramic powder, which comprises adding a liquid ceramic sol to a powder of alloy particles having a microparticle size to obtain a uniform dispersion effect by chemical bonding between the alloy particle powder and a ceramic component, And the intergranular voids can be filled by connecting the particles of the alloy particles to each other, thereby obtaining a metal separation membrane having excellent hydrophilicity.

In addition, the intergranular voids of the alloy particle powder are filled and the water film is not formed in the exposed void portion, so that the breakdown voltage can be reduced and a metal separation membrane having excellent pure water permeability can be obtained.

In addition, the center support layer has a pore size of 1 to 3 μm, and the active layer on the surface has a pore size of less than 1 μm, so that finer and more precise water treatment becomes possible.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an electron micrograph of a cross-section of a section of a metal hollow fiber membrane produced according to the present invention. FIG.
2 is an electron micrograph of the surface of the core portion of the metal hollow fiber membrane produced according to the present invention.
3 is an electron micrograph of a cross section of a core of a metal hollow fiber membrane produced according to the present invention.
4 is an electron micrograph of a section of the sheath of a metal hollow fiber membrane produced according to the present invention.

The method for producing a hydrophilicized metal separation membrane according to the present invention comprises the steps of preparing a dispersion by mixing an alloy particle powder of three and four period transition metals and a ceramic solvent with a polar solvent and adding a synthetic polymer to the dispersion to prepare a support layer solution Wow; Preparing an active layer solution using particles smaller than those used in the support layer solution, proceeding in the same manner as the step of preparing the support layer solution; Spinning the support layer solution and the active layer solution through a nozzle to remove solvent from the phase transition liquid to form a metal separation membrane precursor; Oxidizing the metal separator precursor; And sintering the oxidized metal separation membrane precursor.

At this time, in the step of forming the metal separating film precursor, it is more preferable that the supporting layer solution is positioned at the core portion and the active layer solution is at the sheath portion, so that the sheath portion is positioned at the outer portion of the core portion.

In addition, in the step of preparing the support layer solution, the alloy particle powders of the three-period and four-period transition metals have a particle size of 1 to 20 占 퐉. In the step of preparing the active layer solution, Is characterized by a particle size of 10 to 200 nm.

In addition, the alloy particle powders of the three-period and four-period transition metals are made of any one of stainless steel 304, stainless steel 316 and stainless steel 316L, and the ceramic sol is made of any one of alumina, silica and titania, Is characterized in that it is a polyethersulfone.

In addition, the dispersion is characterized by comprising 65 to 85% by weight of the alloy particle powder of the three-period and four-period transition metals, and 0.5 to 5% by weight of the ceramic sol, and is made of the remaining polar solvent.

In addition, the synthetic polymer is added in an amount of 5 to 15 parts by weight based on 100 parts by weight of the dispersion.

The hydrophilic metal separation membrane of the present invention is produced by the above production method and has a pore size of 3 μm or less. More specifically, the hydrophilic metal separation membrane is composed of a core portion at the center portion and a sheath portion outside the core portion. To 3 mu m, and the sheath portion is characterized in that the pore size is less than 1 mu m.

Hereinafter, the present invention will be described in more detail with reference to the following examples.

≪ Example 1 >

75% by weight of stainless steel 316L (STS 316L) powder having a particle size of 7-9 μm, 5% by weight of liquid alumina sol and 20% by weight of N-methylpyrrolidone (NMP) were mixed and dispersed at 300 rpm or more for 2 hours To prepare a dispersion.

7 parts by weight of polyisocyanurate (PES) and 1 part by weight of polyvinylpyrrolidone (PVP) were prepared and added to 100 parts by weight of the dispersion prepared above based on 100 parts by weight of the dispersion, and mixed for 24 hours to prepare a support layer solution.

32 wt% of stainless steel 316L (STS 316L) powder having a particle size of 70 nm, 3 wt% of liquid alumina sol and 65 wt% of N-methyl pyrrolidone (NMP) were mixed to prepare an active layer solution. To prepare a dispersion.

5 parts by weight of polyisocyanurate (PES) based on 100 parts by weight of the dispersion was added and mixed for 24 hours to prepare an active layer solution.

Then, the supporting layer solution and the active layer solution were put into a spinning chamber and defoaming was performed for 12 hours to prepare a spinning solution.

At this time, the spinning chamber is composed of a triple nozzle structure, in which the inner coagulating solution is injected into the main passage for forming the hollow, the solution of the supporting layer is injected into the inside of the nozzle, and the solution of the active layer is injected to the outside Respectively.

The temperatures of the spinning solution and the water as the phase transfer liquid were maintained at 80 ° C and 35 ° C, respectively, to prepare a precursor in the metal.

The prepared precursor of metal was immersed in water for 24 hours to remove the solvent, and the polymer was oxidized in a high temperature combustion furnace, and sintering and cooling processes were performed to prepare a stainless steel 316L metal hollow fiber membrane.

At this time, the oxidation process was maintained at a flow rate of 5 L / min in an air atmosphere at a rising rate of 5 ° C / min up to 500 ° C for 1 hour.

The sintering process is carried out at a flow rate of 3 L / min in an argon (Ar) atmosphere, and the temperature is raised to 1,300 ° C. at a rate of 5 ° C./min and maintained for 2 hours.

The cooling process is performed at a cooling rate of 10 ° C / min.

The stainless steel 316L metal hollow fiber membrane manufactured through the above process had an outer diameter of 2.4 mm, an inner diameter of 2.0 mm, a support layer coating thickness of 236 탆 as a core, and an active layer coating thickness of 35 탆 as a sheath.

FIGS. 1 to 4 show micrographs of the metal hollow fiber membranes thus prepared.

As shown in the figure, the pore size of the support layer as the core portion 10 was 1 to 3 μm, and the pore size of the active layer as the sheath portion 20 was less than 1 μm.

On the other hand, the pure water permeability was 12,000 L / m 2 · hr and there was no decrease in pure water permeability for 5 hours.

At this time, the pure water permeability was measured at a pressure of 0.5 kgf / cm < 2 >

In order to measure the pure water permeation amount, a module having a membrane area of 0.05 m 2 was used.

The pure water permeability measurement was performed by injecting pure water into the module while pure water was injected from the outer side of the metal sclera to the inner side.

As shown in Table 1, the tensile strength was 39,000 kg / fiber.

The tensile strength was measured at a speed of 50 mm / min using a Instron 4482 tensile strength machine.

≪ Example 2 >

The procedure of Example 1 was followed to prepare a metal hollow fiber membrane,

70 wt% of stainless steel 316L (STS 316L) powder having a particle size of 7 to 9 탆, 10 wt% of a liquid alumina sol and 20 wt% of N-metal pyrrolidone (NMP) For 2 hours to prepare a dispersion.

7 parts by weight of polyisocyanurate (PES) and 1 part by weight of polyvinylpyrrolidone (PVP) were prepared and added to 100 parts by weight of the dispersion prepared above based on 100 parts by weight of the dispersion, and mixed for 24 hours to prepare a support layer solution.

In Example 2, the pure water permeability was 13,500 L / m 2 · hr, and the pure water permeability did not decrease for 5 hours.

At this time, the pure water permeability was measured at a pressure of 0.5 kgf / cm < 2 >

In order to measure the pure water permeation amount, a module having a membrane area of 0.05 m 2 was used.

The pure water permeability measurement was performed by injecting pure water into the module while pure water was injected from the outer side of the metal sclera to the inner side.

≪ Example 3 >

The procedure of Example 1 was followed to prepare a metal hollow fiber membrane,

80 wt% of stainless steel 316L (STS316L) powder having a particle size of 7 to 9 탆, 1 wt% of liquid alumina sol and 19 wt% of N-methyl pyrrolidone (NMP) For 2 hours to prepare a dispersion.

7 parts by weight of polyisocyanurate (PES) and 1 part by weight of polyvinylpyrrolidone (PVP) were prepared and added to 100 parts by weight of the dispersion prepared above based on 100 parts by weight of the dispersion, and mixed for 24 hours to prepare a support layer solution.

In Example 3, the pure water permeability was 9,300 L / m 2 · hr and after 5 hours it was reduced to 35% by 6,000 L / m 2 · hr (see Table 1).

At this time, the pure water permeability was measured at a pressure of 0.5 kgf / cm < 2 >

In order to measure the pure water permeation amount, a module having a membrane area of 0.05 m 2 was used.

The pure water permeability measurement was performed by injecting pure water into the module while pure water was injected from the outer side of the metal sclera to the inner side.

<Example 4>

The procedure of Example 1 was followed to prepare a metal hollow fiber membrane,

77% by weight of stainless steel 316L (STS316L) powder having a particle size of 7 to 9 탆, 3% by weight of a liquid alumina sol and 20% by weight of N-metal pyrrolidone (NMP) For 2 hours to prepare a dispersion.

7 parts by weight of polyisocyanurate (PES) and 1 part by weight of polyvinylpyrrolidone (PVP) were prepared and added to 100 parts by weight of the dispersion prepared above based on 100 parts by weight of the dispersion, and mixed for 24 hours to prepare a support layer solution.

In Example 4, the pure water permeability was found to be 10,900 L / m 2 · hr, and after 5 hours, it was reduced to 21% by 8,600 L / m 2 · hr (see Table 1).

At this time, the pure water permeability was measured at a pressure of 0.5 kgf / cm &lt; 2 &gt;

In order to measure the pure water permeation amount, a module having a membrane area of 0.05 m 2 was used.

The pure water permeability measurement was performed by injecting pure water into the module while pure water was injected from the outer side of the metal sclera to the inner side.

&Lt; Example 5 >

The procedure of Example 1 was followed to prepare a metal hollow fiber membrane,

73% by weight of stainless steel 316L (STS316L) powder having a particle size of 7 to 9 占 퐉, 7% by weight of a liquid alumina sol and 20% by weight of N-metal pyrrolidone (NMP) For 2 hours to prepare a dispersion.

7 parts by weight of polyisocyanurate (PES) and 1 part by weight of polyvinylpyrrolidone (PVP) were prepared and added to 100 parts by weight of the dispersion prepared above based on 100 parts by weight of the dispersion, and mixed for 24 hours to prepare a support layer solution.

In Example 5, the pure water permeability was 12,000 L / m 2 · hr and there was no decrease in the pure water permeability for 5 hours.

At this time, the pure water permeability was measured at a pressure of 0.5 kgf / cm &lt; 2 &gt;

In order to measure the pure water permeation amount, a module having a membrane area of 0.05 m 2 was used.

The pure water permeability measurement was performed by injecting pure water into the module while pure water was injected from the outer side of the metal sclera to the inner side.

&Lt; Example 6 >

The procedure of Example 1 was followed to prepare a metal hollow fiber membrane,

75% by weight of stainless steel 316L (STS316L) powder having a particle size of 7-9 μm, 5% by weight of liquid alumina sol and 20% by weight of N-metal pyrrolidone (NMP) For 2 hours to prepare a dispersion.

7 parts by weight of polyisocyanurate (PES) and 1 part by weight of polyvinylpyrrolidone (PVP) were prepared and added to 100 parts by weight of the dispersion prepared above based on 100 parts by weight of the dispersion, and mixed for 24 hours to prepare a support layer solution.

In addition, the sintering process was carried out for 1 hour, unlike in Example 1.

In Example 6, the pure water permeability was 12,000 L / m 2 · hr and there was no decrease in pure water permeability for 5 hours.

However, as shown in Table 1, the tensile strength was decreased as compared with Example 1. [

At this time, the pure water permeability was measured at a pressure of 0.5 kgf / cm &lt; 2 &gt;

In order to measure the pure water permeation amount, a module having a membrane area of 0.05 m 2 was used.

The pure water permeability measurement was performed by injecting pure water into the module while pure water was injected from the outer side of the metal sclera to the inner side.

&Lt; Example 7 >

The procedure of Example 1 was followed except that the sintering process was carried out at 1,250 ° C for 2 hours.

In Example 7, the pure water permeability was 11,700 L / m 2 · hr and there was no decrease in pure water permeability for 5 hours.

However, as shown in Table 1, the tensile strength was decreased as compared with Example 1. [

&Lt; Comparative Example 1 &

80% by weight of stainless steel 316L (STS316L) powder having a particle size of 7 to 9 占 퐉 and 20% by weight of N-methylpyrrolidone (NMP) were mixed and dispersed at 300 rpm or more for 2 hours to prepare a dispersion. 7 parts by weight of polyisocyanurate (PES) as a reference, and 1 part by weight of polyvinylpyrrolidone (PVP) were added and mixed for 24 hours.

Then, the mixed solution was transferred to a spinning chamber, followed by defoaming for 12 hours to prepare a spinning solution.

The temperature of the spinning solution and the water as the phase transfer liquid were kept at 80 ° C and 35 ° C, respectively, to prepare a construction precursor in the metal.

The prepared precursor of metal was immersed in water for 24 hours to remove the solvent, and the polymer was oxidized in a high temperature combustion furnace, and sintering and cooling processes were performed to prepare a stainless steel 316L metal hollow fiber membrane.

At this time, the oxidation process was maintained at a flow rate of 5 L / min in an air atmosphere at a rising rate of 5 ° C / min up to 500 ° C for 1 hour.

The sintering process was carried out at a flow rate of 3 L / min in an argon (Ar) atmosphere, and the temperature was raised to 1,300 ° C. at a rate of 5 ° C./min and maintained for 2 hours.

The cooling process was performed at a cooling rate of 10 ° C / min.

The metal hollow fiber membrane of Comparative Example 1 showed a pure water permeability of 8,900 L / m 2 · hr, and after 5 hours it was reduced to 48% by 4,600 L / ㎡ · hr.

At this time, the pure water permeability was measured at a pressure of 0.5 kgf / cm &lt; 2 &gt;

To measure the pure water permeation amount, a module having a membrane area of 0.05 m 2 was prepared.

&Lt; Comparative Example 2 &

75% by weight of stainless steel 316L (STS316L) powder having a particle size of 7 to 9 μm, 5% by weight of alumina powder and 20% by weight of N-methylpyrrolidone (NMP) were mixed and dispersed at 300 rpm or more for 2 hours, 7 parts by weight of polyisocyanurate (PES) and 1 part by weight of polyvinylpyrrolidone (PVP) were added to 100 parts by weight of the dispersion and mixed for 24 hours.

The following process was performed in the same manner as in Comparative Example 1 to prepare a metal hollow fiber membrane.

The metal hollow fiber membranes of Comparative Example 2 showed 12,300 L / m 2 · hr of pure water permeability as shown in Table 1, and after 5 hours they were reduced by 15% to 10,400 L / m 2 · hr.

At this time, the pure water permeability was measured at a pressure of 0.5 kgf / cm &lt; 2 &gt;

To measure the pure water permeation amount, a module having a membrane area of 0.05 m 2 was prepared.

&Lt; Comparative Example 3 &

70% by weight of stainless steel 316L (STS316L) powder having a particle size of 7 to 9 μm, 10% by weight of alumina powder and 20% by weight of N-methylpyrrolidone (NMP) were mixed and dispersed at 300 rpm or more for 2 hours, 7 parts by weight of polyisocyanurate (PES) and 1 part by weight of polyvinylpyrrolidone (PVP) were added to 100 parts by weight of the dispersion and mixed for 24 hours.

The following process was performed in the same manner as in Comparative Example 1 to prepare a metal hollow fiber membrane.

The metal hollow fiber membranes of Comparative Example 2 exhibited pure water permeability of 13,000 L / m 2 · hr as shown in Table 1, and no change after 5 hours.

However, the tensile strength was remarkably reduced.

At this time, the pure water permeability was measured at a pressure of 0.5 kgf / cm &lt; 2 &gt;

To measure the pure water permeation amount, a module having a membrane area of 0.05 m 2 was prepared.

division Sintering
Temperature
(° C) Sintering
time
(hr) Hydrophilic agent
Kinds Amount of hydrophilizing agent
(wt /%) Pure permeability
(L / m &lt; 2 &gt; hr) Pure permeability
Decrease (%) The tensile strength
(kg / fiber) Example 1 1,300 2 Alumina sol 5 12,000 39,000 Example 2 1,300 2 Alumina sol 10 13,500 9,600 Example 3 1,300 2 Alumina sol One 9,300 → 6,000 35 67,000 Example 4 1,300 2 Alumina sol 3 10.900 → 8,600 21 48,000 Example 5 1,300 2 Alumina sol 7 12,000 11,200 Example 6 1,300 One Alumina sol 5 12,200 28,000 Example 7 1,250 2 Alumina sol 5 11,700 21,000 Comparative Example 1 1,300 2 Not added 8,900 - 4,600 48 78,000 Comparative Example 2 1,300 2 Alumina
powder 5 12,300 → 10,400 15 33,000 Comparative Example 3 1,300 2 Alumina
powder 10 13,000 9,100

As shown in Table 1, when the addition amount of the alumina sol is 5 wt% or more, as shown in Examples 2 and 5, although the pure water permeability is excellent, the tensile strength is weak and the risk of cutting is great.

Therefore, in the present invention, it is preferable that the addition amount of alumina sol is limited to 5 wt% or less in order to obtain a metal separation membrane excellent in pure water permeability without decreasing the tensile strength.

The alumina sol may be added in an amount of preferably 0.5 wt% to 5 wt%.

<Experimental Example 1>

In Examples 1 to 7 and Comparative Examples 1 to 3, the water permeability and the tensile strength were measured by the following methods.

(1) The pure water permeability is measured by preparing a membrane module having an effective membrane area of 0.05 m &lt; 2 &gt; with a certain length and a number of strands of the metal hollow fiber membrane, and injecting pure water into the membrane module, As shown in FIG.

At this time, the pure water permeability is measured at a pure water inlet pressure of 0.5 kgf / 캜 and a water temperature of 25 캜.

Transmittance (Liter / m 2 · hr) = Liter / membrane area (m 2) × unit time (hr)

(2) The tensile strength is measured at a speed of 50 mm / min using a Instron 4882 tensile strength machine.

10: core part
20: Shebu

Claims (8)

In the method for manufacturing a hydrophilic metal separation membrane,
Preparing a dispersion liquid by mixing an alloy particle powder of a 3-cycle and a 4-period transition metal and a polar solvent in a ceramic sol, and adding a synthetic polymer to the dispersion to prepare a support layer solution;
Preparing an active layer solution using particles smaller than those used in the support layer solution, proceeding in the same manner as the step of preparing the support layer solution;
Spinning the support layer solution and the active layer solution through a nozzle to remove solvent from the phase transition liquid to form a metal separation membrane precursor;
Oxidizing the metal separator precursor;
And sintering the oxidized metal separation membrane precursor.
(Method for manufacturing a hydrophilic metal separator).
The method according to claim 1,
In the step of forming the metal separating film precursor,
Wherein the support layer solution is a core part and the active layer solution is a sheath part so that the sheath part is located outside the core part.
(Method for manufacturing a hydrophilic metal separator).
The method according to claim 1,
In the step of preparing the support layer solution, the alloy particle powders of the three-period and four-period transition metals have a particle size of 1 to 20 탆,
Wherein the alloy particle powders of the three-period and four-period transition metals in the step of preparing the active layer solution have a particle size of 10 to 200 nm.
(Method for manufacturing a hydrophilic metal separator).
The method according to claim 1,
The alloy particle powders of the three-period and four-period transition metals are made of any one of stainless steel 304, stainless steel 316, and stainless steel 316L,
The ceramic sol is composed of any one of alumina, silica, and titania,
Characterized in that the synthetic polymer is a polyethersulfone system.
(Method for manufacturing a hydrophilic metal separator).
The method according to claim 1,
The dispersion may contain,
65 to 85% by weight of an alloy particle powder of 3-cycle and 4-cycle transition metals, and 0.5 to 5% by weight of a ceramic sol, and the balance being made of a polar solvent.
(Method for manufacturing a hydrophilic metal separator).
The method according to claim 1,
Wherein the synthetic polymer is added in an amount of 5 to 15 parts by weight based on 100 parts by weight of the dispersion.
(Method for manufacturing a hydrophilic metal separator).
In the hydrophilic metal separation membrane,
A process for producing a polyurethane foam according to any one of claims 1 to 6, wherein the pore size is 3 mu m or less.
A hydrophilic metal separator.
In the hydrophilic metal separation membrane,
A process for producing a polyurethane foam, which is produced by the manufacturing method of claim 2,
A core portion at the center portion, and a sheath portion at the outer side of the core portion,
Wherein the core portion has a pore size of 1 to 3 占 퐉 and the sheath portion has a pore size of less than 1 占 퐉.
A hydrophilic metal separator.

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