Polyamide reverse osmosis membrane with antifouling property and preparation method thereof

Abstract

The application relates to the technical field of water treatment membranes, in particular to a polyamide reverse osmosis membrane with anti-fouling performance and a preparation method thereof. The polyamide reverse osmosis membrane is prepared by the method. The method comprises the following steps: S1, a first membrane piece is prepared; S2, the first membrane piece is immersed in an amino compound solution to perform an interfacial polymerization reaction, and then, the second membrane piece, namely the polyamide reverse osmosis membrane, is obtained through cleaning treatment. The method further comprises the following step: S3, an alcohol polymer solution is coated on the second membrane piece, and then, the second drying treatment is performed to obtain the polyamide reverse osmosis membrane with a coating layer. The polyamide reverse osmosis membrane with the remarkable anti-fouling performance to cationic pollutants can be prepared.

Description

Technical Field

[0001] This invention relates to the field of water treatment membrane technology, and in particular to a polyamide reverse osmosis membrane with antifouling properties and its preparation method. Background Technology

[0002] In recent years, water treatment membrane products with reverse osmosis membranes at their core have become the primary choice for wastewater treatment and water purification and reuse across various industries. However, some pollutants in water, such as organic matter, inorganic salts, and bacteria, easily adhere and deposit on the surface of reverse osmosis membranes. This causes the water production and desalination performance of the reverse osmosis membranes to decrease over time, directly reducing the lifespan of the membranes. So, how can we reduce the deposition of pollutants on the surface of reverse osmosis membranes?

[0003] Current research indicates that the main factors affecting the antifouling performance of reverse osmosis membranes are membrane surface charge and membrane surface roughness. These factors can be altered through surface modification, coating, and interfacial polymerization control. Among these methods, surface-modified reverse osmosis membrane separation layers are not only simple to manufacture and relatively low in cost, but also allow for the most convenient control of membrane surface charge, thereby reducing contaminant adsorption on the membrane surface. This makes it an effective means to improve the antifouling performance of reverse osmosis membranes.

[0004] Therefore, it is necessary to provide a polyamide reverse osmosis membrane with antifouling properties and its preparation method to solve the problem that pollutants in water can easily adhere and deposit on the surface of the reverse osmosis membrane, thereby reducing the service life of the reverse osmosis membrane. Summary of the Invention

[0005] The purpose of this invention is to provide a polyamide reverse osmosis membrane with antifouling properties and its preparation method. The specific technical solution is as follows:

[0006] In a first aspect, the present invention provides a method for preparing a polyamide reverse osmosis membrane with antifouling properties, comprising:

[0007] Step S1: First, immerse the base membrane in an aqueous solution for a first soaking treatment, then remove the base membrane and remove excess aqueous solution from its surface; then immerse the base membrane in an oil solution for a second soaking treatment, then remove the base membrane and remove excess oil solution from its surface; finally, perform a first drying treatment on the base membrane to obtain a first membrane sheet.

[0008] The aqueous solution contains polyamine monomers;

[0009] The oil phase solution includes polyacrylamide chloride monomers;

[0010] Step S2: Immerse the first membrane in an amino compound solution for interfacial polymerization reaction, and then clean it to obtain the second membrane, namely a polyamide reverse osmosis membrane.

[0011] The amino compound used in the amino compound solution includes at least one first-type amino compound and at least one second-type amino compound; wherein the first-type amino compound includes a primary amine or a secondary amine; and the second-type amino compound includes a primary amine, a secondary amine, or a tertiary amine.

[0012] Optionally, the preparation method further includes: step S3, coating an alcohol polymer solution onto the second membrane, followed by a second drying process to obtain a polyamide reverse osmosis membrane with a coating.

[0013] Optionally, in step S2, the mass percentage of the amino compound in the amino compound solution is 0.001% to 5%, preferably 0.001% to 1%, and more preferably 0.005% to 0.05%.

[0014] The solvent used in the amino compound solution includes at least one of water, isopropanol, and cyclohexane;

[0015] The time for the interfacial polymerization reaction is less than or equal to 2 minutes;

[0016] The cleaning process includes water cleaning or acid cleaning; the cleaning time is 1 to 15 minutes.

[0017] In the acid cleaning process, the acid used includes at least one of hydrochloric acid, acetic acid, citric acid, and malic acid.

[0018] The acidic substance in the acid solution has a mass percentage of 2% to 15%, preferably 6% to 12%.

[0019] The solvent used in the acid solution is water.

[0020] Optionally, the amino compound comprises a general structural formula I:

[0021]

[0022] Wherein, when group L is a primary or secondary amine, group R is a primary, secondary, or tertiary amine; when group R is a primary or secondary amine, group L is a primary, secondary, or tertiary amine; group D1-group D4 are hydrogen, methyl, or ethyl;

[0023] Alternatively, the amino compound comprises a general structural formula II:

[0024]

[0025] Wherein, when group R1 is a primary or secondary amine, at least one of groups R2 to R6 is a primary, secondary, or tertiary amine, and the remaining groups are hydrogen, hydroxyl, methyl, ethyl, primary, secondary, or tertiary amine.

[0026] Optionally, the amino compound is a polyamine, including at least one of diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, and polyethyleneimine.

[0027] Optionally, the amino compound is an amino acid polyamine, including at least one of lysine, arginine, ornithine, 2,3-diaminopropionic acid, 2,4-diaminobutyric acid, histidine, citrulline, and 2,2′-diaminopentanoic acid.

[0028] Optionally, the amino compound is a cyclic polyamine, including imidazole, imidazoline, piperazine, 1-(2-aminoethyl)piperazine, pyrazole, 4-iodopyrazole, 3-bromopyrazole, 4-chloropyrazole, 3-methylpyrazole, 4-methylpyrazole, 3-nitropyrazole, 4-nitropyrazole, 5-amino-1-methylpyrazole-4-carboxylic acid ethyl ester, 5-chloro-3-methyl-4-nitro-1H-pyrazole, pyrazolin, sulfapyrazole, sulfabenzylpyrazole, 1,9-pyrazoloanthrone, 3-aminopyrazole, 4 At least one of the following: aminopyrazole, pyrazole-3-carboxylic acid, 1H-pyrazole-4-carboxylic acid, 1H-pyrazole-3-carboxaldehyde, (1H-pyrazole-4-yl)boronic acid, 1H-pyrazole-3-boronic acid, 3-phenylpyrazole, 5,7-dichloro-3-iodo-1H-pyrazolo[3,4-C]pyridine, dihydropyrazoleone, 1,4-cyclohexanediamine, 1,3-cyclohexanediamine, 1,2-diaminocyclohexane, 1-methyl-2,4-cyclohexanediamine, lamotrigine, melamine, and triazine ring.

[0029] Optionally, in step S3, the coating amount of the alcohol polymer solution on the second membrane is 500–1000 g / m². 2 ;

[0030] The alcohol polymers used in the alcohol polymer solution include polyethylene glycol and / or polyvinyl alcohol;

[0031] The solvent used in the alcohol polymer solution includes at least one of methanol, isopropanol, acetone, N,N-dimethylformamide, and pure water;

[0032] The mass percentage of alcohol polymers in the alcohol polymer solution is 0.005% to 6%, preferably 0.1% to 3%, and more preferably 1% to 3%.

[0033] The second drying process uses a drying temperature of 50-100℃ and a drying time of 30s-10min.

[0034] Optionally, the aqueous solution includes 0.5% to 10% by mass of a polyamine monomer, 0.001% to 10% by mass of an aqueous additive, and 0.001% to 1% by mass of an alkaline substance.

[0035] The polyamine monomer includes at least one selected from m-phenylenediamine, p-phenylenediamine, o-phenylenediamine, m-phenylenediamine, p-phenylenediamine, o-phenylenediamine, 3,5-diaminotoluene, 3,5-diaminobenzoic acid, 4,4'-diaminodiphenylmethane, and 4,4'-diaminobiphenyl.

[0036] The aqueous phase additive includes at least one of sodium dodecyl sulfate, camphor sulfonic acid, and N-methylpyrrolidone;

[0037] The alkaline substance includes at least one of sodium hydroxide, potassium hydroxide, and triethylamine, used to adjust the pH of the aqueous solution to 10.2–11.5;

[0038] The soaking time for the first soaking treatment is 10s to 2min, preferably 10s to 1min, and more preferably 15s to 30s;

[0039] The oil phase solution contains 0.08% to 0.2% by mass of polyacrylamide chloride monomer;

[0040] The polyacryl chloride monomer includes at least one of isophthaloyl chloride, terephthaloyl chloride, and 1,3,5-benzotrichloromethyl chloride;

[0041] The solvent used in the oil phase solution includes at least one of cyclohexane, n-decane, n-pentane, toluene, chlorobenzene, and m-xylene;

[0042] The soaking time for the second soaking treatment is 10s to 2min, preferably 10s to 1min, and more preferably 15s to 30s;

[0043] The first drying process uses a drying temperature of 10–80°C and a drying time of 30 s–10 min.

[0044] The time between the base membrane being removed from the aqueous solution and being immersed in the oil solution is 30 seconds to 3 minutes.

[0045] The time between the base film being removed from the oil phase solution and the first drying treatment is 30 seconds to 3 minutes.

[0046] The base film includes at least one of polyethersulfone, polysulfone, polyacrylonitrile, and polyvinylidene fluoride.

[0047] In a second aspect, the present invention provides a polyamide reverse osmosis membrane with antifouling properties, which is prepared by the method for preparing the polyamide reverse osmosis membrane with antifouling properties described above.

[0048] The application of the technical solution of the present invention has at least the following beneficial effects:

[0049] (1) The present invention provides a method for preparing a polyamide reverse osmosis membrane with antifouling properties, which can prepare a polyamide reverse osmosis membrane with significant antifouling properties against cationic pollutants. Specifically, in step S1, the present invention uses a polyamine monomer and a polyacrylamide chloride monomer to undergo an interfacial polymerization reaction on a base membrane to produce a polyamide layer; in step S2, the amino compound used (specifically, a primary or secondary amine of the first type of amino and the second type of amino) can further undergo an interfacial polymerization reaction with the unreacted acrylamide chloride groups in the polyamide layer to form amides, thereby reducing the negatively charged carboxyl groups generated by the hydrolysis of the acrylamide chloride groups, and thus reducing the electronegativity of the polyamide reverse osmosis membrane; in addition, some unreacted amino compounds (specifically, primary or secondary amines of the first type of amino and the second type of amino) or non-reacting amino compounds (specifically, tertiary amines of the second type of amino) exist in the form of conjugate acids in the aqueous environment, that is, they are positively charged, which will further reduce the electronegativity of the reverse osmosis membrane. This reduces the adhesion and binding ability of positively charged cationic organic matter on the membrane surface, thereby improving the membrane's resistance to cationic pollutants.

[0050] (2) The present invention provides a method for preparing a polyamide reverse osmosis membrane with antifouling properties. In step S3, the coating treatment with alcohol polymer solution can, on the one hand, cover and encapsulate some of the carboxyl functional groups on the polyamide layer, thereby playing a certain physical shielding role and weakening the adsorption effect of negatively charged carboxylate groups on cationic pollutants. On the other hand, the hydroxyl groups in the alcohol polymer solution can undergo a condensation reaction with the negatively charged carboxyl groups on the polyamide layer to generate ester bonds, thereby further improving the membrane's resistance to cationic pollutants.

[0051] (3) The polyamide reverse osmosis membrane prepared by the present invention has significant antifouling properties, which can slow down the rate of decline in permeate flux and extend the cleaning cycle and service life. Detailed Implementation

[0052] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] Example 1:

[0054] A method for preparing a polyamide reverse osmosis membrane with antifouling properties, comprising:

[0055] Step S1: First, immerse the base film (specifically polysulfone) in an aqueous solution for a first soaking treatment, then remove the base film and remove excess aqueous solution from its surface; then immerse the base film in an oil solution for a second soaking treatment, then remove the base film and remove excess oil solution from its surface; finally, perform a first drying treatment on the base film to obtain a first film sheet.

[0056] The aqueous solution comprises 3% by mass of a polyamine monomer (specifically m-phenylenediamine), 0.1% by mass of an aqueous additive (specifically sodium dodecyl sulfate), and 0.2% by mass of an alkaline substance (specifically sodium hydroxide); the pH of the aqueous solution is 10.5.

[0057] The oil phase solution contains 0.2% by mass of a polyacrylamide chloride monomer (specifically 1,3,5-benzenetricarboxyl chloride); the solvent used in the oil phase solution is cyclohexane.

[0058] The soaking time for the first soaking treatment is 20 seconds;

[0059] The second soaking treatment uses a soaking time of 20 seconds;

[0060] The first drying process is completed in an oven at a temperature of 30°C for 1 minute.

[0061] The base membrane is placed for 2 minutes after being taken out of the aqueous solution and before being immersed in the oil solution, so as to facilitate the removal of excess aqueous solution from the surface of the base membrane;

[0062] The base film is placed for 2 minutes after being taken out of the oil phase solution and before the first drying treatment, so as to facilitate the removal of excess oil phase solution from the surface of the base film.

[0063] Step S2: Immerse the first membrane in an amino compound solution for interfacial polymerization reaction, and then clean it to obtain the second membrane, namely a polyamide reverse osmosis membrane.

[0064] The amino compound used in the amino compound solution includes at least one first-type amino group and at least one second-type amino group; wherein, the first-type amino group includes a primary amine or a secondary amine; and the second-type amino group includes a primary amine, a secondary amine, or a tertiary amine.

[0065] The mass percentage of the amino compound (specifically m-phenylenediamine, see general structural formula II) in the amino compound solution is 0.5%.

[0066] The solvent used in the amino compound solution is pure water;

[0067] The time for the interfacial polymerization reaction is 1 minute;

[0068] The cleaning process includes acid cleaning; the cleaning time is 5 minutes.

[0069] In the acid cleaning process, the acid used is hydrochloric acid;

[0070] The acidic substance in the acid solution has a mass percentage of 2%;

[0071] The solvent used in the acid solution is water.

[0072] Example 2:

[0073] Unlike Example 1, isopropanol was used as the solvent in the amino compound solution.

[0074] Example 3:

[0075] Unlike Example 1, it also includes:

[0076] Step S3: Coat the second membrane with an alcohol polymer solution, and then perform a second drying process to obtain a polyamide reverse osmosis membrane with a coating.

[0077] The amount of the alcohol polymer solution coated on the second membrane is 500 g / m². 2 ;

[0078] The alcohol polymer used in the alcohol polymer solution is polyvinyl alcohol;

[0079] The solvent used in the alcohol polymer solution is pure water;

[0080] The mass percentage of alcohol polymers in the alcohol polymer solution is 1%.

[0081] The second drying process is completed in an oven at a temperature of 50°C for 1 minute.

[0082] Example 4:

[0083] Unlike Example 3, isopropanol was used as the solvent in the amino compound solution.

[0084] Example 5:

[0085] Unlike Example 3, the amino compound in the amino compound solution is N,N-dimethylethylenediamine (see general structural formula I).

[0086] Example 6:

[0087] Unlike Example 3, the amino compound in the amino compound solution is triethylenetetramine.

[0088] Example 7:

[0089] Unlike Example 3, the amino compound in the amino compound solution is polyethyleneimine.

[0090] Example 8:

[0091] Unlike Example 3, the amino compound in the amino compound solution is lysine.

[0092] Example 9:

[0093] Unlike Example 3, the amino compound in the amino compound solution is an imidazoline.

[0094] Example 10:

[0095] Unlike Example 3, the amino compound in the amino compound solution is 1,4-cyclohexanediamine.

[0096] Comparative Example 1:

[0097] Unlike Example 1, step S2 is omitted; the first membrane obtained in step S1 is first washed once in pure water, and then washed with the same acid solution as in Example 1.

[0098] Comparative Example 2:

[0099] Unlike Example 1, step S2 is omitted; the first membrane obtained in step S1 is first washed in isopropanol, and then washed with the same acid solution as in Example 1.

[0100] Comparative Example 3:

[0101] Unlike Comparative Example 1, step S3 from Example 3 is included after acid washing.

[0102] Comparative Example 4:

[0103] Unlike Comparative Example 2, step S3 from Example 3 is included after acid washing.

[0104] The polyamide reverse osmosis membranes prepared in Examples 1-10 and Comparative Examples 1-4 were sampled and tested as follows (test results are shown in Table 1):

[0105] Membrane initial flux and initial desalination rate test method: The initial test conditions are: pressure 15.5 bar, flow rate 4-4.5 L / min, sodium chloride concentration 2000 ppm, and temperature 25℃. After testing under these initial test conditions for 30 min, the membrane initial flux (i.e., permeate flux in Table 1) and initial desalination rate (i.e., sodium chloride rejection rate in Table 1) are measured.

[0106] Test method for DTAB (dodecyltrimethylammonium bromide) contamination by cationic pollutant: DTAB concentration 20 ppm. After adding DTAB under the above initial test conditions, the flux decay rate of the membrane was measured after running for 1 hour, and the flux recovery rate of the membrane was measured after washing with 0.1% hydrochloric acid aqueous solution for 15 minutes.

[0107] Test method for anionic contaminant SDS (sodium dodecyl sulfate): SDS concentration 150 ppm. After adding SDS under the above initial test conditions, the flux decay rate of the membrane was measured after running for 1 hour. The flux recovery rate of the membrane was measured after washing with 0.4% sodium hydroxide aqueous solution for 15 minutes.

[0108] Flux decay rate = [1 - (flux after contamination / initial flux)] × 100%.

[0109] Flux recovery rate = [flux after cleaning / initial flux] × 100%.

[0110] Table 1 Test Results

[0111]

[0112]

[0113] As shown in Table 1, compared with Comparative Examples 1-4, the polyamide reverse osmosis membranes prepared by the present invention using Examples 1-10 not only have comparable initial flux (i.e., permeate flux), initial desalination rate (i.e., sodium chloride rejection rate), SDS fouling flux decay rate, and SDS fouling flux recovery rate, but also significantly improved DTAB fouling flux decay rate and DTAB fouling flux recovery rate. They exhibit good comprehensive antifouling performance against both cationic and anionic pollutants, which facilitates extending the cleaning cycle, reducing the number of cleaning cycles, and extending the membrane life.

[0114] Compared with Example 1, Example 3 shows that combining steps S2 and S3 can further improve the anti-cationic contaminant performance of polyamide reverse osmosis membrane.

[0115] Compared with Example 1 and Example 2, and compared with Example 3, using isopropanol as a solvent in an amino compound solution can increase the initial flux (i.e., permeate flux) of the polyamide reverse osmosis membrane.

[0116] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the present invention's specification under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A method for preparing a polyamide reverse osmosis membrane with antifouling properties, characterized in that, include: Step S1: First, immerse the base film in an aqueous solution for a first soaking treatment, then remove the base film and remove excess aqueous solution from its surface; The base film is then immersed in an oil phase solution for a second soaking treatment, followed by removal of the base film and removal of excess oil phase solution from its surface; finally, the base film is subjected to a first drying treatment to obtain a first film sheet; The aqueous solution contains polyamine monomers; The oil phase solution includes polyacrylamide chloride monomers; Step S2: Immerse the first membrane in an amino compound solution for interfacial polymerization reaction, and then clean it to obtain the second membrane, namely a polyamide reverse osmosis membrane. The amino compound used in the amino compound solution includes at least one first-type amino group and at least one second-type amino group; wherein, the first-type amino group includes a primary amine or a secondary amine; and the second-type amino group includes a primary amine, a secondary amine, or a tertiary amine. It also includes: step S3, coating the second membrane with an alcohol polymer solution, followed by a second drying process to obtain a polyamide reverse osmosis membrane with a coating; In step S2, the mass percentage of the amino compound in the amino compound solution is 0.001% to 5%. The solvent used in the amino compound solution includes at least one of pure water, isopropanol, and cyclohexane; The time for the interfacial polymerization reaction is less than or equal to 2 minutes; The cleaning process includes water cleaning or acid cleaning; the cleaning time is 1 to 15 minutes. In the acid cleaning process, the acid used includes at least one of hydrochloric acid, acetic acid, citric acid, and malic acid. The acidic substance has a mass percentage of 2% to 15% in the acid solution; The solvent used in the acid solution is water; In step S3, the coating amount of the alcohol polymer solution on the second membrane is 500~1000 g / m². 2 ; The alcohol polymers used in the alcohol polymer solution include polyethylene glycol and / or polyvinyl alcohol; The solvent used in the alcohol polymer solution includes at least one of methanol, isopropanol, acetone, N,N-dimethylformamide, and pure water; The mass percentage of alcohol polymers in the alcohol polymer solution is 0.005%~6%; The second drying process uses a drying temperature of 50~100℃ and a drying time of 30s-10min; The aqueous solution comprises 0.5% to 10% by mass of polyamine monomer, 0.001% to 10% by mass of aqueous additive, and 0.001% to 1% by mass of alkaline substances.

2. The method for preparing the polyamide reverse osmosis membrane with antifouling properties as described in claim 1, characterized in that, The amino compound includes general structural formula I: ； Wherein, when group L is a primary or secondary amine, group R is a primary, secondary, or tertiary amine; when group R is a primary or secondary amine, group L is a primary, secondary, or tertiary amine; group D1-group D4 are hydrogen, methyl, or ethyl; Alternatively, the amino compound comprises a general structural formula II: ； When group R1 is a primary or secondary amine, at least one of groups R2 to R6 is a primary, secondary, or tertiary amine, and the remaining groups are hydrogen, hydroxyl, methyl, ethyl, primary, secondary, or tertiary amine.

3. The method for preparing the polyamide reverse osmosis membrane with antifouling properties as described in claim 1, characterized in that, The amino compound is a polyamine, including at least one of diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, and polyethyleneimine.

4. The method for preparing the polyamide reverse osmosis membrane with antifouling properties as described in claim 1, characterized in that, The amino compound is an amino acid polyamine, including at least one of lysine, arginine, ornithine, 2,3-diaminopropionic acid, 2,4-diaminobutyric acid, histidine, citrulline, and 2,2ʹ-diaminoglutaric acid.

5. The method for preparing the polyamide reverse osmosis membrane with antifouling properties as described in claim 1, characterized in that, The amino compound is a cyclic polyamine, including imidazole, imidazoline, piperazine, 1-(2-aminoethyl)piperazine, pyrazole, 4-iodopyrazole, 3-bromopyrazole, 4-chloropyrazole, 3-methylpyrazole, 4-methylpyrazole, 3-nitropyrazole, 4-nitropyrazole, 5-amino-1-methylpyrazole-4-carboxylic acid ethyl ester, 5-chloro-3-methyl-4-nitro-1H-pyrazole, pyrazolin, sulfapyrazole, sulfabenzylpyrazole, 1,9-pyrazoloanthrone, 3-aminopyrazole, 4-aminopyrazole, etc. The following is a list of at least one of the following: pyrazole, pyrazole-3-carboxylic acid, 1H-pyrazole-4-carboxylic acid, 1H-pyrazole-3-carboxaldehyde, (1H-pyrazole-4-yl)boronic acid, 1H-pyrazole-3-boronic acid, 3-phenylpyrazole, 5,7-dichloro-3-iodo-1H-pyrazolo[3,4-C]pyridine, dihydropyrazoleone, 1,4-cyclohexanediamine, 1,3-cyclohexanediamine, 1,2-diaminocyclohexane, 1-methyl-2,4-cyclohexanediamine, lamotrigine, melamine, and triazine ring.

6. The method for preparing the polyamide reverse osmosis membrane with antifouling properties as described in claim 1, characterized in that, The polyamine monomer includes at least one selected from m-phenylenediamine, p-phenylenediamine, o-phenylenediamine, m-phenylenediamine, p-phenylenediamine, o-phenylenediamine, 3,5-diaminotoluene, 3,5-diaminobenzoic acid, 4,4'-diaminodiphenylmethane, and 4,4'-diaminobiphenyl. The aqueous phase additive includes at least one of sodium dodecyl sulfate, camphor sulfonic acid, and N-methylpyrrolidone; The alkaline substance includes at least one of sodium hydroxide, potassium hydroxide, and triethylamine, used to adjust the pH of the aqueous solution to 10.2-11.5; The soaking time for the first soaking treatment is 10 seconds to 2 minutes; The oil phase solution contains 0.08% to 0.2% by mass of polyacrylamide chloride monomer; The polyacryl chloride monomer includes at least one of isophthaloyl chloride, terephthaloyl chloride, and 1,3,5-benzotrichloromethyl chloride; The solvent used in the oil phase solution includes at least one of cyclohexane, n-decane, n-pentane, toluene, chlorobenzene, and m-xylene; The second soaking treatment uses a soaking time of 10 seconds to 2 minutes; The first drying process uses a drying temperature of 10~80℃ and a drying time of 30s-10min; The time between the base membrane being removed from the aqueous solution and being immersed in the oil solution is 30 seconds to 3 minutes. The time from when the base film is taken out of the oil phase solution to when it is placed before the first drying treatment is 30s to 3min. The base film includes at least one of polyethersulfone, polysulfone, polyacrylonitrile, and polyvinylidene fluoride.

7. A polyamide reverse osmosis membrane with antifouling properties, characterized in that, It is prepared by the method for preparing a polyamide reverse osmosis membrane with antifouling properties as described in any one of claims 1 to 6.

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