CN115282789A - ABS-Ni composite separation membrane and preparation method and application thereof - Google Patents
ABS-Ni composite separation membrane and preparation method and application thereof Download PDFInfo
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- CN115282789A CN115282789A CN202210080856.9A CN202210080856A CN115282789A CN 115282789 A CN115282789 A CN 115282789A CN 202210080856 A CN202210080856 A CN 202210080856A CN 115282789 A CN115282789 A CN 115282789A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0079—Manufacture of membranes comprising organic and inorganic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/12—Composite membranes; Ultra-thin membranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/02—Inorganic material
- B01D71/022—Metals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y80/00—Products made by additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/36—Hydrophilic membranes
Abstract
The invention relates to an ABS-Ni composite separation membrane and a preparation method and application thereof, wherein the preparation method comprises the following steps: carrying out pretreatment including etching treatment on the ABS film, and immersing the pretreated ABS film into a silver ion water solution to obtain an ABS-Ag film adsorbed with silver ions; and (3) immersing the ABS-Ag film into a chemical nickel plating solution, and performing chemical plating reaction to obtain the ABS-Ni composite separation film. According to the invention, the ABS-Ni composite separation membrane is prepared by chemically plating the metal nickel layer on the 3D printing base membrane, so that the ABS-Ni composite separation membrane has excellent anti-fouling performance, hydrophilicity and underwater super-oleophobic property. The preparation method is simple to operate, mild in reaction process conditions, free of energy consumption, high in adaptability and easy to realize large-scale industrial application.
Description
Technical Field
The invention relates to the technical field of polymer film surface modification, in particular to an ABS-Ni composite separation film and a preparation method and application thereof.
Background
The membrane technology is the most widely used technology for oil-water separation due to its advantages of high separation efficiency, low cost, no secondary pollution and the like. However, the membrane fouling problem and the limitations of the membrane preparation process become huge challenges during membrane application. Membrane fouling can result in a substantial reduction in filtration rate, thereby increasing energy consumption and cost. The separation efficiency of the membrane is limited by the mutual restriction of selectivity and permeability of the common membrane preparation process. Therefore, there is a need in the art to improve the conventional film-making process and to develop a better alternative process. Currently, rapidly developed nano electrostatic spinning membranes, two-dimensional layered structure membranes and the like have made certain progress in the preparation and modification of membranes, and 3D printing technology is also gradually applied to membrane preparation.
The 3D printing technology can precisely design and control the macro structure of the film through a computer and has the advantage of realizing one-time film forming. The 3D printing technology is mainly classified into four categories, i.e., photo-polymerization, powder fusion, material extrusion, and sheet lamination, and Fused Deposition Manufacturing (FDM) is widely used because it has advantages of low cost, simple operation, high speed, and the like. The FDM technology extrudes thermoplastic plastic wires on a tray according to coordinates preset by software, and a film structure is formed after two layers of plastic wires are stacked.
As a model material of the 3D printing technology, acrylonitrile-butadiene-styrene (ABS) has the common performance of three components, is a non-toxic material, and has good impact resistance, heat resistance, low temperature resistance and the like. Therefore, the 3D printed film not only has the advantages of being tougher and more resistant to acids and alkalis, but also has significantly reduced toxicity, as compared to conventional commercial films. 3D printed films offer new possibilities for optimization of the materials and structures of commercial films. However, the 3D printed film cannot be directly used as a separation film, and is still to be modified to improve its hydrophilicity, conductivity, contamination resistance, and the like.
Disclosure of Invention
The invention aims to provide an ABS-Ni composite separation membrane and a preparation method and application thereof.
To this end, in a first aspect, the present invention provides a method for preparing an ABS-Ni composite separation membrane, comprising the steps of:
the ABS film was pretreated as follows: etching the ABS film;
immersing the pretreated ABS film into a silver ion water solution to obtain an ABS-Ag film adsorbed with silver ions;
and (3) immersing the ABS-Ag film into a chemical nickel plating solution, and performing chemical plating reaction to obtain the ABS-Ni composite separation film.
Further, the ABS film may be prepared by 3D printing, such as melt-stacking technique 3D printing.
Further, the pore diameter of the ABS film is 100-400 μm, such as 100 μm, 150 μm, 200 μm, 250 μm, 300 μm, 350 μm, 400 μm, and the like.
Further, the preprocessing step further includes, before the etching process: an ABS film is degreased with an alkaline solution.
Further, the alkaline solution comprises one or a combination of more than two of sodium hydroxide solution, potassium hydroxide solution and lithium hydroxide solution.
In some embodiments, the alkaline solution comprises: sodium carbonate, sodium phosphate, sodium hydroxide and an emulsifier.
Further, in the alkaline solution, the concentration of the sodium carbonate is 30-40g/L, such as 30g/L, 35g/L, 40g/L and the like; the concentration of the sodium phosphate is 20-30g/L, such as 20g/L, 25g/L, 30g/L and the like; the concentration of the sodium hydroxide is 20-30g/L, such as 20g/L, 25g/L, 30g/L and the like.
In one embodiment, the emulsifier is an OP emulsifier, and the concentration of OP emulsifier in the alkaline solution is 0.2-0.5% (V/V), e.g., 0.2%, 0.3%, 0.4%, 0.5%, etc.
Further, the reaction temperature of the pretreatment is 60 to 80 ℃, for example, 60 ℃, 70 ℃, 80 ℃ and the like.
Further, the reaction time of the pretreatment is 5-25min, such as 5min, 10min, 15min, 20min, 25min, and the like.
Further, the solution for the etching treatment includes a potassium permanganate solution.
In some embodiments, the solution for the etching process comprises: potassium permanganate, phosphoric acid and sulfuric acid.
Further, in the solution for the etching treatment, the concentration of the potassium permanganate is 75-85g/L, such as 75g/L, 80g/L, 85g/L and the like; the concentration of phosphoric acid is 0.5-2% (V/V), e.g., 0.5%, 1%, 1.5%, 2%, etc.; the concentration of sulfuric acid is 0.5-2% (V/V), e.g., about 0.5%, 1%, 1.5%, 2%, etc.
In another embodiment, the solution for the etching process is formulated as follows: slowly adding phosphoric acid into the potassium permanganate solution, and fully and uniformly stirring to obtain solution A; preparing a sulfuric acid solution as a solution B; and slowly pouring the liquid B into the liquid A and fixing the volume.
Further, the silver ion solution is a silver nitrate solution or a silver chloride solution.
Further, the concentration of silver ions in the silver ion solution is 5 to 15mmol/L, for example, 5mmol/L, 8mmol/L, 9.4mmol/L, 10mmol/L, 15mmol/L, etc.
According to the technical scheme of the invention, silver ions adsorbed by the ABS film are used as a catalyst for subsequent chemical plating. The reaction for adsorbing silver ions can be carried out at room temperature.
Further, the time for immersing the pretreated ABS film into the silver ion aqueous solution is more than 40min, such as 40min, 50min, 60min, 100min, 120min and the like.
Further, the electroless nickel plating solution comprises: nickel salt, metal complexing agent and reducing agent.
Further, the nickel salt is one or a combination of more than two of nickel sulfate, nickel chloride, nickel acetate, nickel hypophosphite and nickel sulfamate.
Further, the metal complexing agent is one or the combination of two of sodium ethylene diamine tetracetate and sodium pyrophosphate.
Further, the reducing agent is dimethylamino borane.
Further, the chemical nickel plating solution also comprises ammonia water.
In some embodiments, the electroless nickel plating solution comprises nickel sulfate, sodium pyrophosphate, ammonia, and dimethylaminoborane.
In other embodiments, the electroless nickel plating solution comprises nickel sulfate hexahydrate, sodium pyrophosphate decahydrate, ammonia, dimethylaminoborane.
In still other embodiments, the electroless nickel plating solution has a concentration of nickel sulfate hexahydrate of 20 to 30g/L, e.g., 20g/L, 25g/L, 30g/L, etc.; the concentration of sodium pyrophosphate decahydrate is 45-55g/L, such as 45g/L, 50g/L, 55g/L and the like; ammonia concentrations of 1-2%, e.g., about 1%, 1.1%, 1.2%, 1.5%, 2%, etc.; the concentration of the dimethylaminoborane is 1 to 2g/L, for example, 1g/L, 1.5g/L, 2g/L, etc.
Further, the temperature of the electroless plating reaction is 20 to 40 ℃, such as 20 ℃, 25 ℃, 30 ℃, 35 ℃, 40 ℃ and the like; the time of the chemical plating reaction is 3-10min, such as 3min, 4min, 5min, 6min, 8min, 10min, and the like.
In a second aspect of the invention, an ABS-Ni composite separation membrane is provided, which is prepared by the preparation method of the invention.
In a third aspect of the invention, the ABS-Ni composite separation membrane is applied to oil-water separation.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
(1) According to the invention, the ABS-Ni composite separation membrane is prepared by chemically plating the metal nickel layer on the 3D printing base membrane, so that the ABS-Ni composite separation membrane has excellent anti-fouling performance, hydrophilicity and underwater super-oleophobic property, when oily wastewater is separated under gravity, the retention rate of the oily wastewater can reach 99.78% under the action of gravity, and the flux reaches 53366L m 2 h -1 。
(2) According to the invention, the ABS base film is directly printed by using the 3D printer, and the film with orderly arranged film holes and regular shape can be obtained only by inputting the design model into the printer and without manual operation of film making. The method is simple, convenient and quick in film making, simple in operation method, low in cost and obvious in popularization advantage.
(3) According to the invention, the adsorption of silver ions is realized through a simple soaking mode, and then the metal nickel is reduced in situ on the ABS base film under the catalytic action of the silver ions, so that the nickel is successfully coated on the 3D printing ABS film. The method is simple to operate, mild in reaction process conditions, free of energy consumption, strong in adaptability and easy to realize large-scale industrial application.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. In the drawings:
FIG. 1: a real object diagram of the ABS film and the ABS-Ni composite separation film provided by the invention; a is an ABS film, b is an ABS-Ni composite separation film;
FIG. 2: scanning electron microscope images of the ABS film and the ABS-Ni composite separation film provided by the invention; c and e are ABS films, d and f are ABS-Ni composite separation films;
FIG. 3: the flux contrast diagram of ABS membrane and ABS-Ni composite separation membrane with different apertures under the action of gravity;
FIG. 4: and the oil-water separation efficiency comparison graph of the ABS film and the ABS-Ni composite separation film with different apertures under the action of gravity.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Example 1
The embodiment provides an ABS-Ni composite separation membrane, and the preparation method comprises the following steps:
an industrial grade 3D printer (F170, stratasys, USA) prints ABS membranes with uniform and regular membrane pores by melt-stacking technique, resulting in ABS membranes with the following three pore sizes: 240X 400 μm, 100X 240 μm, 100X 150 μm; the membranes with the three pore diameters are respectively prepared into corresponding ABS-Ni composite separation membranes according to the following steps.
(I) pretreatment
(1) Oil removal treatment: 35g of Na 2 CO 3 、25g Na 3 PO 4 Dissolving 25g of NaOH and 3mL of OP emulsifier in 1L of water to prepare an alkaline solution; and (3) immersing the ABS film into the alkaline solution, and reacting for 5min at the temperature of 70 ℃.
(2) Preparing an etching solution: 40g of KMnO 4 Adding pure water for dissolving, slowly adding 5mL of phosphoric acid, and fully and uniformly stirring to prepare solution A; slowly pouring 5mL of concentrated sulfuric acid into 50mL of water, and uniformly stirring to prepare a solution B; and slowly pouring the solution B into the solution A, and fixing the volume to 500mL to prepare an etching solution.
(3) Etching treatment: and (3) soaking the degreased ABS film into the etching solution, and reacting for 15min at 70 ℃. 28g of H 2 C 2 O 4 Mix 25mL H 2 SO 4 And the volume is fixed to 1L, the etched ABS film is immersed in the solution for neutralization reaction, and the solution is taken out and then is cleaned by pure water.
(II) electroless nickel plating
(1) Adsorbing silver ions: the pretreated ABS film is immersed in 1.597g/L AgNO 3 And reacting in the solution at 25 ℃ for 40min to enable the ABS film to adsorb silver ions, thereby preparing the ABS-Ag film.
(2) Preparing a chemical plating solution: 25g of NiSO 4 ·6H 2 O、50g Na 4 P 2 O 7 ·10H 2 O, 45mL of 28% aqueous ammonia, 1.5g of C 2 H 10 BN uses pure water to fix the volume to 1L, and chemical plating solution is prepared.
(3) Chemical plating reaction: and (3) immersing the ABS-Ag film into the chemical plating solution for chemical plating reaction, and reacting for 4min at 25 ℃ to obtain the ABS-Ni composite separation film. Fully washing the ABS-Ni composite separation membrane and then storing in ionized water.
A physical diagram of the ABS film and the ABS-Ni composite separation film prepared as above is shown in FIG. 1, wherein FIG. 1a is the ABS film, and FIG. 1b is the ABS-Ni composite separation film. According to FIG. 1, the ABS film exhibited an opaque ivory color, while the ABS-Ni composite separation film exhibited a silvery-white metallic luster.
Further investigation of the film surface morphology by scanning electron microscopy imaging, as shown in fig. 2, the ABS film surface morphology was smoother (fig. 2c and 2 e), while the ABS-Ni composite separation film surface was rougher (fig. 2d and 2 f); and it can be obviously seen that the surface of the ABS-Ni composite separation membrane is uniformly distributed with metal nickel particles, which indicates that the surface of the ABS membrane is successfully plated with a metal nickel layer.
Example 2
The embodiment provides an ABS-Ni composite separation membrane, and the preparation method comprises the following steps:
an industrial grade 3D printer (F170, stratasys, USA) prints an ABS membrane with uniform and regular membrane pores by a melt-stacking technology, and a corresponding ABS-Ni composite separation membrane is prepared according to the following steps.
(I) pretreatment
(1) Oil removal treatment: 40g of Na 2 CO 3 、20g Na 3 PO 4 Dissolving 30g of NaOH and 5mL of OP emulsifier in 1L of water to prepare an alkaline solution; and (3) immersing the ABS film into the alkaline solution, and reacting for 5min at the temperature of 70 ℃.
(2) Preparing an etching solution: 37.5g of KMnO 4 Adding pure water for dissolving, slowly adding 8mL of phosphoric acid, and fully and uniformly stirring to prepare solution A; slowly pouring 5mL of concentrated sulfuric acid into 50mL of water, and uniformly stirring to prepare a solution B; and slowly pouring the solution B into the solution A, and fixing the volume to 500mL to prepare an etching solution.
(3) Etching treatment: and (3) soaking the degreased ABS film into the etching solution, and reacting for 15min at 70 ℃. 28g of H 2 C 2 O 4 Mix 25mL H 2 SO 4 And fixing the volume to 1L, immersing the etched ABS film in the solution for neutralization reaction, and taking out the filmThen the product is cleaned by pure water.
(II) electroless nickel plating
(1) Adsorbing silver ions: and (3) immersing the pretreated ABS film into 1.347g/L AgCl solution, and reacting for 50min at 25 ℃ to enable the ABS film to adsorb silver ions, thereby preparing the ABS-Ag film.
(2) Preparing a chemical plating solution: 30g of NiSO 4 ·6H 2 O、55g Na 4 P 2 O 7 ·10H 2 O, 45mL of 28% aqueous ammonia, 2g of C 2 H 10 BN is subjected to constant volume to 1L by pure water, and a chemical plating solution is prepared.
(3) Chemical plating reaction: and (3) immersing the ABS-Ag film into the chemical plating solution for chemical plating reaction, and reacting for 5min at the temperature of 30 ℃ to obtain the ABS-Ni composite separation film. Fully washing the ABS-Ni composite separation membrane and then storing in ionized water.
Example 3
The embodiment provides an ABS-Ni composite separation membrane, and the preparation method comprises the following steps:
an industrial grade 3D printer (F170, stratasys, USA) prints an ABS film with uniform and regular film pores by a melt stacking technology, and prepares a corresponding ABS-Ni composite separation membrane according to the following steps.
(I) pretreatment
(1) Oil removal treatment: mixing 30g of Na 2 CO 3 、30g Na 3 PO 4 Dissolving 20g of NaOH and 5mL of OP emulsifier in 1L of water to prepare an alkaline solution; and (3) immersing the ABS film into the alkaline solution, and reacting for 5min at the temperature of 70 ℃.
(2) Preparing an etching solution: 42.5g of KMnO 4 Adding pure water for dissolving, slowly adding 5mL of phosphoric acid, and fully and uniformly stirring to prepare solution A; slowly pouring 8mL of concentrated sulfuric acid into 50mL of water, and uniformly stirring to prepare solution B; and slowly pouring the solution B into the solution A, and fixing the volume to 500mL to prepare an etching solution.
(3) Etching treatment: and immersing the deoiled ABS film into the etching solution, and reacting for 15min at 70 ℃. 28g of H 2 C 2 O 4 Mix 25mL H 2 SO 4 And fixing the volume to 1L, and etchingThe etched ABS film is immersed in the solution for neutralization reaction, and is taken out and then is cleaned by pure water.
(II) electroless nickel plating
(1) Adsorbing silver ions: immersing the pretreated ABS film into 1.597g/L AgNO 3 And reacting in the solution for 50min at 25 ℃ to enable the ABS film to adsorb silver ions, thereby preparing the ABS-Ag film.
(2) Preparing a chemical plating solution: 25g of NiSO 4 ·6H 2 O、45g Na 4 P 2 O 7 ·10H 2 O, 45mL of 28% aqueous ammonia, 1g of C 2 H 10 BN is subjected to constant volume to 1L by pure water, and a chemical plating solution is prepared.
(3) Chemical plating reaction: and (3) immersing the ABS-Ag film into the chemical plating solution for chemical plating reaction, and reacting for 5min at the temperature of 30 ℃ to obtain the ABS-Ni composite separation film. Fully washing the ABS-Ni composite separation membrane and then storing in ionized water.
Examples of the experiments
The ABS-Ni composite separation membrane prepared in example 1 was subjected to a separation test of an oil-water mixture under the action of gravity only. The test results are shown in fig. 3 and 4. According to the test result, the flux of the ABS-Ni composite separation membrane is obviously improved compared with that of an ABS membrane. In the aspect of retention rate, the retention rate of the unmodified ABS membrane is 0% no matter the pore size, and the ABS membrane does not play any role in oil-water separation; the modified ABS-Ni composite separation membrane has good interception effect when filtering oil-water separation products, and particularly after the ABS-Ni composite separation membrane is modified by a membrane with the aperture of 100 multiplied by 150 mu m, the flux reaches 53366 L.m -2 h -1 Meanwhile, the retention rate is as high as 99.78%.
While the invention has been described with reference to specific preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A preparation method of an ABS-Ni composite separation membrane is characterized by comprising the following steps:
the ABS film was pretreated as follows: etching the ABS film;
immersing the pretreated ABS film into a silver ion water solution to obtain an ABS-Ag film adsorbed with silver ions;
and (3) immersing the ABS-Ag film into a chemical nickel plating solution, and performing chemical plating reaction to obtain the ABS-Ni composite separation film.
2. The production method according to claim 1, wherein the ABS film is produced by 3D printing;
preferably, the pore size of the ABS film is 100-400 μm.
3. The method according to claim 1, wherein the preprocessing step further includes, before the etching treatment: carrying out oil removal treatment on the ABS film by using an alkaline solution;
preferably, the alkaline solution comprises one or a combination of more than two of sodium hydroxide solution, potassium hydroxide solution and lithium hydroxide solution;
preferably, the alkaline solution comprises: sodium carbonate, sodium phosphate, sodium hydroxide and an emulsifier.
4. The production method according to any one of claims 1 to 3, wherein the reaction temperature of the pretreatment is 60 to 80 ℃.
5. The production method according to claim 1, wherein the solution used for the etching treatment comprises a potassium permanganate solution;
preferably, the solution for the etching treatment includes: potassium permanganate, phosphoric acid, sulfuric acid;
preferably, in the solution for the etching treatment, the concentration of the potassium permanganate is 75-85g/L, the concentration of the phosphoric acid is 0.5-2% (V/V), and the concentration of the sulfuric acid is 0.5-2% (V/V).
6. The production method according to claim 1, wherein the silver ion solution is a silver nitrate solution or a silver chloride solution;
preferably, the concentration of silver ions in the silver ion solution is 5-15mmol/L;
preferably, the time for immersing the pretreated ABS film into the silver ion aqueous solution is more than 40 min.
7. The method of claim 1, wherein said electroless nickel plating solution comprises: nickel salt, metal complexing agent and reducing agent;
preferably, the nickel salt is one or the combination of more than two of nickel sulfate, nickel chloride, nickel acetate, nickel hypophosphite and nickel sulfamate;
preferably, the metal complexing agent is one or a combination of two of sodium ethylene diamine tetracetate and sodium pyrophosphate;
preferably, the reducing agent is dimethylaminoborane;
preferably, the electroless nickel plating solution further comprises ammonia.
8. The method according to claim 1, wherein the electroless plating reaction is carried out at a temperature of 20 to 40 ℃ for 3 to 10min.
9. An ABS-Ni composite separation membrane, characterized in that the ABS-Ni composite separation membrane is prepared by the preparation method of any one of claims 1 to 8.
10. The ABS-Ni composite separation membrane prepared by the preparation method of any one of claims 1 to 8 is applied to oil-water separation.
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