KR20100116344A - A water purification filter and method for fabricating in the same - Google Patents

Abstract

PURPOSE: A water purification filter and a method for fabricating thereof are provided to improve the pollutant removal capability and offer high permeability. CONSTITUTION: A water purification filter comprises a supporter film(120), and a reverse osmosis membrane(130) including the membrane protein of the aquaporine(140) series. The supporter film is formed by one polymer based material among polysulfone and teflon. The membrane protein is among aquaporine 1~12, aquaporine -Z and aquaporine -M. The membrane protein is included to the content of 0.1~50 wt% in the reverse osmosis membrane.

Description

A water purification filter and Method for fabricating in the same}

The present invention relates to a water filter for purifying water and a method for producing the same.

Water is the most fundamental factor in human life and indispensable, but with a growing population and rising industrial demand, about 2.7 billion people will face fresh water shortages in 2025, and one fifth of the world's countries are facing serious water shortages. The UN forecasts.

Acceleration of industrialization and urbanization has led to serious water pollution problems, according to the World Water Forum, where 1.1 billion people currently do not drink safe water and more than 5 million die each year from waterborne diseases.

In order to solve this problem of water shortage, research has been conducted on the development of a water filter capable of purifying contaminated water with drinking water.

In the case of the conventional reverse osmosis (RO) filter that can filter out all impurities, water is moved to a low concentration solution by applying more than osmotic pressure to the contaminated water or high concentration solution.

However, in the case of the above-described RO type water filter, the removal of contaminants is excellent, but the permeability is too low.

Because of this low water permeability, especially in industrial applications, the energy consumption is too high, and the amount of water to be discarded is also large.

An object of the present invention is to provide a water purification filter and a method for producing the same by forming a reverse osmosis membrane using an aquaporin-based membrane protein, and a high water permeability.

Water filter according to the present invention for achieving the above object, the support membrane; It is formed on the support membrane, the reverse osmosis membrane including aquaporin-based membrane protein; consists of.

In this case, the support layer may be formed using any one polymer-based material of polysulfone and Teflon.

In addition, the membrane protein may be a membrane protein of at least one of aquaporin 1 to 12, aquaporin-Z and aquaporin-M, and may be included in the reverse osmosis membrane at 0.1 to 50 wt%.

In addition, the membrane protein may be an aquaporin vesicle mixed with any one of a lipid bi-layer and a block copolymer.

In addition, the reverse osmosis membrane may be made of any one of m-phenylene diamine (m-phenylene diamine; hereinafter 'MPD') and trimesoyl chloride (hereinafter, 'TMC') and the membrane protein. It can be formed in thickness of 100-200 nm.

In addition, the method for producing a water filter according to the present invention includes the steps of forming a support membrane; And forming a reverse osmosis membrane including aquaporin-based membrane protein on the support membrane.

At this time, the reverse osmosis membrane forming step, preparing a first solution of m-phenylene diamine (m-phenylene diamine; hereinafter 'MPD') and the membrane protein mixed; Applying the mixed first solution onto the support film; Applying a second solution including trimesoyl chloride (hereinafter, 'TMC') on the first solution; And drying the coated first and second solutions.

The reverse osmosis membrane forming step may include preparing a first solution in which TMC and the membrane protein are mixed; Applying the mixed first solution onto the support film; Applying a second solution comprising MPD on the first solution; And drying the coated first and second solutions.

The water filter according to the present invention and a method for manufacturing the same are formed by using an aquaporin-based membrane protein to form a reverse osmosis membrane, thereby improving the ability to remove contaminants and providing high permeability.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of embodiments with reference to the accompanying drawings.

Hereinafter, preferred embodiments of the present invention, in which the above object can be specifically realized, are described with reference to the accompanying drawings.

In the accompanying drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity, and the thickness ratios of the layers in the drawings do not represent actual thickness ratios.

On the other hand, when a part such as a layer, film, region, plate, etc. is formed or positioned on another part, it is formed directly on the other part and not only in direct contact but also when another part exists in the middle thereof. It should also be understood to include.

In the present invention, a water filter is produced by using a membrane protein of Aquaporin series.

1 is a view showing aquaporin according to the present invention.

As shown in Figure 1, Aquaporin can exclude the passage of all contaminants, including bacteria, viruses, minerals, salts, and the like, and at the same time, its structural properties can selectively transfer only water. Can be.

Aquaporin is a membrane protein composed of about 300 amino acids and is symmetrical in and out of cells. The central part of the aquaporin is a very narrow hourglass. The narrowest part is about 3 mm 3, which is similar to the water (H ₂ O) molecule size. Two alanines in the NPA box are arranged side by side in the water passage to pass only water (H ₂ O) molecules but not hydrogen (H +) ions.

As described above, aquaporin induces the entry and exit of water molecules, while interfering with the passage of other ions or solutes. That is, it is a membrane protein, also known as a water channel.

Water movement can be a major advantage in commercialization because it is symmetrical, can go in any direction and does not consume energy.

Aquaporin is composed of six transmembrane α-helixes arranged clockwise and has amino acids and carboxy termini on the cytoplasmic surface of the membrane.

Amino acids and carboxy half show similarities with tandem repeats.

It is believed that this stems from the replication of genes of the first size in the early stages of evolution. There are also five (AE) loops inside and outside the cell, while loops B and E are non-hydrophobic but maintain the NPA motif of the Asn-Pro-Ala and occupy the middle of the lipid bilayer and are three-dimensional hourglasses. It is shaped to allow water to pass through here.

There are NPA motifs and narrower seletivity filters or ar / R seletivity filters.

Aquaporin as described above allows water and small uncharged solutes, ie glycerol, CO2, ammonia, urea, etc., to permeate according to the pore size.

Aquaporin depends on the peptide sequence, which varies in pore size in the protein. The size of the pore affects the size of the molecules passing through it. But water pores are not permeable to charged molecules, ie protons or those with electrochemical properties.

Hereinafter, the present invention will be described in detail with respect to the manufacturing process of the water filter having a high water permeability while showing the excellent ability to remove the contaminants by adding the above-mentioned aquaporin to the reverse osmosis membrane (RO) of the water filter.

2 to 5 is a view showing a manufacturing process of the water filter containing aquaporin according to the present invention.

First, as shown in FIG. 2, the water filter according to the present invention forms the support membrane 110 on the permeable membrane 110 through which water can pass.

The support membrane 120 may be formed of an ultrafilter or microfilter including polymer-based materials such as polysulfone and Teflon having a porosity, and may be formed of a ceramic other than the polymer. , Metal, carbon, or the like.

In addition, the permeable membrane 110 may be formed to a thickness of 80 to 120㎛, it may be formed using a nonwoven fabric or the like. Further, the support film 120 may be formed to a thickness of 40 to 60 占 퐉.

Next, as shown in FIG. 3, the reverse osmosis membrane 130 is formed on the above-described support membrane 120.

The reverse osmosis membrane 130 is a polyamide reverse osmosis membrane, and is formed to a thickness of 100 to 200 nm.

At this time, the reverse osmosis membrane 130 according to the present invention, as shown in Figures 4 and 5, is formed by the addition of aquaporin-based membrane protein.

That is, FIG. 4 illustrates a reverse osmosis membrane 130 in which aquaporin 140 is added, and FIG. 5 illustrates a reverse osmosis membrane 130 in which aquaporin vesicles 150 are added.

At this time, the aquaporin 140 according to the present invention may be a membrane protein of at least one of aquaporin 1 to 12, aquaporin-Z and aquaporin-M.

In addition, as shown in Figure 5, the aquaporin hydrophobic 130 according to the present invention is aquaporin 140 in the lipid bi-layer (141) or block copolymer (Block copolymer) (141) It is a mixed vesicle.

In this case, the block copolymer may be at least one polymer series of poly (ethylene oxide), poly (ethylene propylene), poly (2-methyloxazoline), poly (propylene sulfide), and poly (dimethylsiloxane).

6 and 7, a process of manufacturing the reverse osmosis membrane 130 containing the aquaporin-based membrane protein according to the present invention will be described in detail.

6 is a flowchart illustrating a process of preparing a reverse osmosis membrane containing aquaporin-based membrane protein according to the present invention.

Figure 7 is a cross-sectional view showing the manufacturing process of the reverse osmosis membrane containing aquaporin-based membrane protein according to the present invention.

Reverse osmosis membrane 130 according to the present invention can be formed using a monomer (monomer) solution for the production of a polyamide-based reverse osmosis-type nanofiltration membrane, the monomer solution in the polymerization reaction, The reverse osmosis membrane 130 may be prepared by using all kinds of polymer reactions such as interfacial polymerization reaction, emulsion reaction, temperature, heat, light, microwave, catalyst, oxidation / reduction, and the like.

6 and 7 illustrate a process of manufacturing the reverse osmosis membrane 130 using the interfacial polymerization reaction among the polymer reactions described above.

6 and 7, 0.1 to 50 wt% aquaporin-based membrane protein in a monomer solution for preparing a polyamide-based reverse osmosis-type nanofiltration membrane 130 according to the present invention ( A first solution to which 140 is added is prepared (S61), and the prepared first solution is applied onto the support film 120 (S62) (FIG. 7 (a)).

In this case, (a) of FIG. 7 illustrates that aquaporin 140 is added to the monomer solution, and aquaporin hydrophobic 150 may be added to the monomer solution.

The monomer solution is a polymer forming solution, which is m-phenylene diamine (hereinafter referred to as 'MPD') 131, which is a water-soluble monomer, and a tree that is a hydrophobic monomer. Mesoyl chloride (hereinafter, 'TMC') 132 may be included.

That is, in steps S61 to S62 of FIG. 6 and FIG. 7A, a first solution in which the water-soluble monomer-based MPD 131 and the aquaporin 140 are mixed is coated on the support layer 120. have.

At this time, when the first solution to which the aquaporin 140 is added is applied on the support membrane 120, the aquaporin 140 is seated in a minute hole of the support membrane 120 having a porosity to selectively permeate water. Can be.

Next, a second solution including TMC 132, which is a hydrophobic monomer series, is prepared (S63), and the prepared second solution is applied onto the first solution (S64) (FIG. 7). (b)].

Subsequently, when the support membrane 120 coated with the first and second solutions is heated and dried at approximately 80 to 100 ° C. (S65), the reverse osmosis membrane 130 containing the aquaporin-based membrane protein according to the present invention Is formed (Fig. 7 (c)).

As described above, when the aquaporin-based membrane protein is added to the monomer solution which is a polymer forming solution, the membrane protein is spontaneously trapped in the polymer network during the cross-linking reaction, thereby causing reverse osmosis according to the present invention. The film 130 is formed.

6 and 7 described above, the MPD 131 and the aquaporin 140 are mixed in the first solution, and the TMC 132 is included in the second solution, but the TMC 132 and the first solution are described. Aquaporin 140 is mixed, MPD 131 may be included in the second solution to prepare a reverse osmosis membrane (130).

6 and 7, the MPD 131 and the aquaporin 140 are mixed and the TMC 132 is included in the second solution, but only the MPD 131 is included in the first solution. TMC 132 and aquaporin 140 is mixed in the solution 2 may be prepared reverse osmosis membrane (130).

6 and 7, the MPD 131 and the aquaporin 140 are mixed in the first solution, and the TMC 132 is included in the second solution. However, only the TMC 132 is included in the first solution. Included, the reverse osmosis membrane 130 may be prepared by mixing the MPD 131 and the aquaporin 140 in the second solution.

6 and 7 illustrate that the aquaporin 140 is added to the reverse osmosis membrane 130, the reverse osmosis membrane 130 may be prepared by adding the aquaporin hydrophobic 150.

As described above, in the water filter according to the present invention, by adding aquaporin-based membrane protein in the reverse osmosis membrane, the ability to remove contaminants can be improved, and high permeability can be provided.

The above-described water filter according to the present invention can be applied to power generation systems such as pressure-retarded osmosis and general water treatment from domestic water purifiers to seawater desalination.

It will be apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit and essential features of the present invention.

Accordingly, the above detailed description should not be construed as limiting in all aspects and should be considered as illustrative.

The scope of the invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention.

1 is a view showing aquaporin according to the present invention.

2 to 5 is a view showing a manufacturing process of the water filter containing aquaporin according to the present invention.

6 is a flowchart illustrating a process of preparing a reverse osmosis membrane containing aquaporin-based membrane protein according to the present invention.

Figure 7 is a cross-sectional view showing the manufacturing process of the reverse osmosis membrane containing aquaporin-based membrane protein according to the present invention.

Claims (15)

Support membrane; And And a reverse osmosis membrane formed on the support membrane and including an aquaporin-based membrane protein. According to claim 1, The support membrane is a water filter, characterized in that formed using any one polymer-based material of polysulfone (Polysulfone) and Teflon (Teflon). According to claim 1, The membrane protein is a water filter, characterized in that the membrane protein of at least one of aquaporin 1 to 12, aquaporin-Z and aquaporin-M series. According to claim 1, The membrane protein is a water filter, characterized in that contained in the reverse osmosis membrane at 0.1 to 50 wt%. According to claim 1, The membrane protein is a water purification filter, characterized in that the aquaporin hydrophobic (Vesicle) mixed with any one of a lipid bi-layer (Block copolymer) and a lipid (Block copolymer). According to claim 1, The reverse osmosis membrane is a water filter comprising any one of m-phenylene diamine (hereinafter referred to as 'MPD') and trimesoyl chloride (hereinafter referred to as 'TMC') and the membrane protein. . According to claim 1, The reverse osmosis membrane is a water filter, characterized in that formed in a thickness of 100 to 200nm. Forming a support film; And Forming a reverse osmosis membrane including aquaporin-based membrane protein on the support membrane; The method of claim 8, The forming of the support film, the method of manufacturing a water filter, characterized in that formed using any one polymer-based material of polysulfone (Polysulfone) and Teflon (Teflon). The method of claim 8, The membrane protein is a method for producing a water filter, characterized in that the membrane protein of at least one of aquaporin 1 to 12, aquaporin-Z and aquaporin-M series. The method of claim 8, The membrane protein is a method of producing a water purification filter, characterized in that the aquaporin hydrophobic (Vesicle) mixed with any one of the lipid bi-layer (Lipid bi-layer) and block copolymer (Block copolymer). The method of claim 8, wherein the reverse osmosis membrane forming step, preparing a first solution in which m-phenylene diamine (hereinafter referred to as 'MPD') and the membrane protein are mixed; Applying the mixed first solution on the support film; Applying a second solution including trimesoyl chloride (hereinafter, 'TMC') on the first solution; And And drying the applied first and second solutions. The method of claim 8, wherein the reverse osmosis membrane forming step, Preparing a first solution in which TMC and the membrane protein are mixed; Applying the mixed first solution onto the support film; Applying a second solution comprising MPD on the first solution; And And drying the applied first and second solutions. The method according to claim 12 or 13, The sum of the thickness to which the said 1st solution and the 2nd solution are apply | coated is 100-200 nm, The manufacturing method of the water filter characterized by the above-mentioned. The method according to claim 12 or 13, The membrane protein is a method for producing a water filter, characterized in that added 0.1 to 50 wt%.

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