CN111974026B - Oil-water separation filter screen and preparation method thereof - Google Patents
Oil-water separation filter screen and preparation method thereof Download PDFInfo
- Publication number
- CN111974026B CN111974026B CN202010896339.XA CN202010896339A CN111974026B CN 111974026 B CN111974026 B CN 111974026B CN 202010896339 A CN202010896339 A CN 202010896339A CN 111974026 B CN111974026 B CN 111974026B
- Authority
- CN
- China
- Prior art keywords
- oil
- water separation
- filter screen
- separation filter
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Medicinal Chemistry (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Polymers & Plastics (AREA)
- Water Supply & Treatment (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention provides an oil-water separation filter screen and a preparation method thereof, wherein the preparation method comprises the following steps: a) uniformly mixing N, N-diethylacrylamide, [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide, a cross-linking agent and an initiator in water, introducing nitrogen to remove oxygen, and placing at 1-5 ℃ to obtain a gel pre-polymerization solution; b) immersing a copper mesh into the gel pre-polymerization liquid obtained in the step a), and carrying out in-situ polymerization to obtain an oil-water separation filter screen. The oil-water separation filter screen is obtained by quickly modifying a copper mesh by using a hydrogel which is wide in salt domain, super-hydrophilic and constantly swelling, the preparation method is simple and efficient, the film forming stability is good, the prepared oil-water separation filter screen has wide salt domain applicability on the basis of having an excellent oil-water separation function, the oil-water separation range is widened to the field of salt solutions with different concentrations, meanwhile, the oil-water separation filter screen also has high recovery efficiency on oil pollutants with high viscosity, and the oil-water separation filter screen can be suitable for the field of industrial wastewater separation with complex changes.
Description
Technical Field
The invention relates to the technical field of high molecular substance separation, in particular to an oil-water separation filter screen and a preparation method thereof.
Background
In recent years, a large amount of domestic wastewater and industrial high-salinity oil stain wastewater is discharged to cause great damage to the living environment and the natural ecological environment of human beings; meanwhile, the heavy oil pollution caused by frequent occurrences of increasingly prosperous river shipping and marine oil leakage accidents poses a serious challenge to the ecological environment of rivers and oceans, and particularly, the local large-scale oil pollution of rivers and oceans needs to be rapidly solved in a short time so as to prevent the pollution range from being expanded. Therefore, in order to solve the problem of oil pollution in a complex and variable water body environment, the development of a technology for rapidly preparing oil-water separation equipment with high separation efficiency and wide applicability becomes a global topic of wide attention.
At present, the oil-water separation material with special wettability achieves high efficiency and high selectivity which are difficult to realize by the traditional materials and technologies, and becomes a new breakthrough for promoting the development of oil-water separation technology. The polymer-based, ceramic-based and carbon-based nanofiber membranes obtained based on the electrostatic spinning technology have the outstanding characteristics of adjustable wettability, good flexibility, communicated open pore structures and the like, and become an excellent choice of oil-water separation materials. However, the electrostatic spinning method has relatively complex preparation process, time-consuming large-area production and high cost, particularly has low separation recovery rate for high-viscosity oil stains, is easy to cause membrane blockage and generates secondary pollution. The oil-water separation membrane/net modified by the hydrogel based on the bionic marine organism surface has excellent super-hydrophilic surface and underwater super-oleophobic performance, so that the high-efficiency oil-water separation effect is realized; particularly, the separation and the quick recovery of high-viscosity oil are realized, the secondary pollution of the separation is effectively prevented, and the tedious post-treatment process and the waste of oily materials are avoided. However, due to the wide source of oily wastewater, besides containing a large amount of low-polarity organic matters with different molecular weights, the high-salt environment of seawater and the complex acid, alkali and high-salt environment in industrial wastewater put higher demands on the applicability of oil-water separation materials.
Disclosure of Invention
In view of the above, the invention aims to provide an oil-water separation filter screen and a preparation method thereof, the preparation method provided by the invention is simple and efficient, the film forming stability is good, the prepared oil-water separation filter screen has wide salt domain applicability on the basis of having an excellent oil-water separation function, has high recovery efficiency on oil pollutants with high viscosity, and can be applied to the field of separation of industrial wastewater with complex changes.
The invention provides a preparation method of an oil-water separation filter screen, which comprises the following steps:
a) uniformly mixing N, N-diethylacrylamide, [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide, a cross-linking agent and an initiator in water, introducing nitrogen to remove oxygen, and placing at 1-5 ℃ to obtain a gel pre-polymerization solution;
b) immersing a copper mesh into the gel pre-polymerization liquid obtained in the step a), and carrying out in-situ polymerization to obtain an oil-water separation filter screen.
Preferably, the molar ratio of the N, N-diethylacrylamide and the [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide in the step a) is (3-5): 1.
preferably, the cross-linking agent in step a) is selected from one or more of methylene bisacrylamide, polyethylene glycol dimethacrylate and magnesium aluminum silicate.
Preferably, the amount of the cross-linking agent used in step a) is 0.1 to 0.5% by mass of the total mass of N, N-diethylacrylamide and [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide.
Preferably, the initiator in step a) is selected from one or more of ammonium persulfate, potassium persulfate and azobisisobutylamidine hydrochloride.
Preferably, the amount of the initiator used in step a) is 0.6 to 1.2% of the total mass of N, N-diethylacrylamide and [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide.
Preferably, the amount of water used in step a) is 200 to 400% of the total mass of N, N-diethylacrylamide and [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide.
Preferably, before the step b) of immersing the copper mesh into the gel pre-polymerization solution obtained in the step a), the method further comprises the following steps:
pretreating the copper mesh; the pretreatment process specifically comprises the following steps:
soaking the copper net in 0.5-2 wt% dilute hydrochloric acid for 1-5 min to remove surface oxides, then washing with water and naturally drying to obtain the pretreated copper net.
Preferably, the temperature of the in-situ polymerization in the step b) is 20-30 ℃ and the time is 1-10 min.
The invention also provides an oil-water separation filter screen which is prepared by the preparation method of the technical scheme.
The invention provides an oil-water separation filter screen and a preparation method thereof, wherein the preparation method comprises the following steps: a) uniformly mixing N, N-diethylacrylamide, [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide, a cross-linking agent and an initiator in water, introducing nitrogen to remove oxygen, and placing at 1-5 ℃ to obtain a gel pre-polymerization solution; b) immersing a copper mesh into the gel pre-polymerization liquid obtained in the step a), and carrying out in-situ polymerization to obtain an oil-water separation filter screen. Compared with the prior art, the oil-water separation filter screen provided by the invention is obtained by quickly modifying a copper screen by a hydrogel which is wide in salt domain, super-hydrophilic and constant in swelling, the preparation method is simple and efficient, the film forming stability is good, the prepared oil-water separation filter screen has wide salt domain applicability on the basis of having an excellent oil-water separation function, the oil-water separation range is widened to the field of salt solutions with different concentrations, meanwhile, the oil pollutant with high viscosity is recovered with high efficiency, and the oil-water separation filter screen can be applied to the field of separation of industrial wastewater with complex change. Experimental results show that the oil-water separation filter screen prepared by the preparation method provided by the invention has good effect and tolerance on separation of different types of oil stains in pure water, 1 wt% of calcium chloride, 10 wt% of calcium chloride and saturated calcium chloride solvents, the separation efficiency of various oil/water mixtures can reach more than 98%, and particularly the separation recovery rate of high-viscosity oil stains is very high.
In addition, the preparation method provided by the invention also has the advantages of cheap and easily available raw materials, simple and convenient process, easy operation, capability of being carried out at room temperature and the like; the product also has good cyclic usability, and can be suitable for the fields of fresh water surface oil pollution, ocean pollution, chemical food production and the like; therefore, the oil-water separation filter screen and the preparation method thereof have wide application prospects.
Drawings
FIG. 1 is a schematic diagram showing a brief process of a preparation method provided in example 1 of the present invention and performance results of a corresponding product;
FIG. 2 is a schematic diagram of results of oil adhesion resistance of the oil-water separation filter screen provided in example 1 of the present invention and the hydrogel-modified hydrophilic filter screens provided in comparative examples 1 to 2;
FIG. 3 is a schematic diagram of the separation efficiency results of the oil-water separation filter screen provided in example 1 of the present invention and the hydrogel-modified hydrophilic filter screens provided in comparative examples 1 to 2;
fig. 4 is a schematic diagram of the film forming stability results of the oil-water separation filter screen provided in example 1 of the present invention and the hydrogel-modified hydrophilic filter screens provided in comparative examples 1 to 2.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a preparation method of an oil-water separation filter screen, which comprises the following steps:
a) uniformly mixing N, N-diethylacrylamide, [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide, a cross-linking agent and an initiator in water, introducing nitrogen to remove oxygen, and placing at 1-5 ℃ to obtain a gel pre-polymerization solution;
b) immersing a copper mesh into the gel pre-polymerization liquid obtained in the step a), and carrying out in-situ polymerization to obtain an oil-water separation filter screen.
The invention firstly mixes N, N-diethyl acrylamide, [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide, cross linker and initiator in water, and puts them at 1-5 deg.C after nitrogen is introduced to remove oxygen, to obtain the gel pre-polymerization liquid. In the present invention, the N, N-Diethylacrylamide (DEA) and [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide (DMAPS) are polymeric monomers, and the structural formula is as follows:
DMAPS：
the hydrogel in the oil-water separation filter screen obtained by the invention is a copolymer based on two monomers of DEA and DMAPS. The source of the DEA and DMAPS in the present invention is not particularly limited, and commercially available products known to those skilled in the art may be used. In the present invention, the molar ratio of N, N-diethylacrylamide and [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide is preferably (3 to 5): 1, more preferably 4: 1.
in the present invention, the crosslinking agent is preferably selected from one or more of methylene bisacrylamide, polyethylene glycol dimethacrylate and magnesium aluminum silicate, and more preferably methylene bisacrylamide. The source of the crosslinking agent is not particularly limited in the present invention, and commercially available products known to those skilled in the art may be used. In a preferred embodiment of the invention, the crosslinking agent is methylene Bisacrylamide (BIS) having the following structural formula:
BIS：
in the present invention, the amount of the crosslinking agent is preferably 0.1 to 0.5% by mass of the total mass of N, N-diethylacrylamide and [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide, and more preferably 0.2 to 0.4% by mass of the total mass of N, N-diethylacrylamide and [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide.
In the present invention, the initiator is preferably selected from one or more of ammonium persulfate, potassium persulfate, and azobisisobutylamidine hydrochloride, and more preferably ammonium persulfate. The source of the initiator is not particularly limited in the present invention, and commercially available products known to those skilled in the art may be used. In the present invention, the amount of the initiator to be used is preferably 0.6 to 1.2% by mass of the total mass of N, N-diethylacrylamide and [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide, and more preferably 0.8 to 1% by mass of the total mass of N, N-diethylacrylamide and [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide.
The water is not particularly limited in the present invention, and deionized water well known to those skilled in the art may be used. In the present invention, the amount of water used is preferably 200 to 400% by mass of the total mass of N, N-diethylacrylamide and [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide, and more preferably 290 to 310% by mass of the total mass of N, N-diethylacrylamide and [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide.
In the present invention, the process of mixing N, N-diethylacrylamide, [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide, the cross-linking agent and the initiator in water is preferably embodied as follows:
dissolving N, N-diethyl acrylamide and [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide, a cross-linking agent and an initiator in water, and stirring at 20-30 ℃ until the cross-linking agent and the initiator are fully dissolved to obtain a mixed solution.
After the mixed solution is obtained, the mixed solution is put at 1-5 ℃, preferably 4 ℃ after being deaerated by introducing nitrogen, so as to obtain the gel pre-polymerization solution.
After the gel pre-polymerization liquid is obtained, the copper mesh is immersed into the obtained gel pre-polymerization liquid for in-situ polymerization, and the oil-water separation filter screen is obtained. The source of the copper mesh is not particularly limited in the present invention, and commercially available products known to those skilled in the art may be used. In the present invention, the mesh size of the copper mesh is preferably 50 to 200 mesh, and more preferably 100 mesh.
In the present invention, before immersing the copper mesh in the gel pre-polymerization solution obtained in step a), it is preferable that the method further comprises:
pretreating the copper mesh; the purpose of the pretreatment is to obtain a clean and dry copper mesh.
In the present invention, the pretreatment process preferably includes:
soaking the copper mesh in 0.5-2 wt% dilute hydrochloric acid for 1-5 min to remove surface oxides, then washing with water, and naturally drying to obtain a pretreated copper mesh;
more preferably:
and (3) soaking the copper mesh in 1 wt% of dilute hydrochloric acid for 2min to remove surface oxides, cleaning with water, and naturally airing to obtain the pretreated copper mesh.
In the present invention, the temperature of the in-situ polymerization is preferably 20 ℃ to 30 ℃, more preferably 25 ℃; the time for the in-situ polymerization is preferably 1min to 10min, and more preferably 2min to 5 min.
The preparation method provided by the invention is simple and efficient, has good film forming stability, has the advantages of cheap and easily-obtained raw materials, simple and convenient process, easy operation, capability of being carried out at room temperature and the like, and has wide application prospect.
The invention also provides an oil-water separation filter screen which is prepared by the preparation method of the technical scheme. The oil-water separation filter screen provided by the invention is obtained by quickly modifying a copper screen by using a hydrogel which is wide in salt domain, super-hydrophilic and constantly swelling, and the prepared oil-water separation filter screen has wide salt domain applicability on the basis of having an excellent oil-water separation function, so that the oil-water separation range is widened to the field of salt solutions with different concentrations, and meanwhile, the oil pollutant with high viscosity is recovered with high efficiency, and the oil-water separation filter screen can be applied to the field of separation of industrial wastewater with complex change; in addition, the oil-water separation filter screen provided by the invention has good recycling performance and can be suitable for the fields of fresh water surface oil pollution, ocean pollution, chemical food production and the like.
The invention provides an oil-water separation filter screen and a preparation method thereof, wherein the preparation method comprises the following steps: a) uniformly mixing N, N-diethylacrylamide, [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide, a cross-linking agent and an initiator in water, introducing nitrogen to remove oxygen, and placing at 1-5 ℃ to obtain a gel pre-polymerization solution; b) immersing a copper mesh into the gel pre-polymerization liquid obtained in the step a), and carrying out in-situ polymerization to obtain an oil-water separation filter screen. Compared with the prior art, the oil-water separation filter screen provided by the invention is obtained by quickly modifying a copper screen by a hydrogel which is wide in salt domain, super-hydrophilic and constant in swelling, the preparation method is simple and efficient, the film forming stability is good, the prepared oil-water separation filter screen has wide salt domain applicability on the basis of having an excellent oil-water separation function, the oil-water separation range is widened to the field of salt solutions with different concentrations, meanwhile, the oil pollutant with high viscosity is recovered with high efficiency, and the oil-water separation filter screen can be applied to the field of separation of industrial wastewater with complex change. Experimental results show that the oil-water separation filter screen prepared by the preparation method provided by the invention has good effect and tolerance on separation of different types of oil stains in pure water, 1 wt% of calcium chloride, 10 wt% of calcium chloride and saturated calcium chloride solvents, particularly has high separation recovery rate on high-viscosity oil stains, and has separation efficiency higher than 98%.
In addition, the preparation method provided by the invention also has the advantages of cheap and easily available raw materials, simple and convenient process, easy operation, capability of being carried out at room temperature and the like; the product also has good cyclic usability, and can be suitable for the fields of fresh water surface oil pollution, ocean pollution, chemical food production and the like; therefore, the oil-water separation filter screen and the preparation method thereof have wide application prospects.
To further illustrate the present invention, the following examples are provided for illustration. The raw materials used in the following examples of the present invention are all commercially available; wherein the copper mesh is a commercially available 100-mesh brass mesh.
Example 1
(1) Mixing the components in a molar ratio of 4: 1 of N, N-Diethylacrylamide (DEA) (35.34g) and [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide (DMAPS) (64.42g), together with 0.3g of methylenebisacrylamide (BIS) and 0.9g of ammonium persulfate, were dissolved in 300mL of deionized water, stirred at room temperature (about 25 ℃) until fully dissolved, then purged with nitrogen to remove oxygen, and stored at 4 ℃ to obtain a gel prepolymer.
(2) Soaking the copper mesh in 1 wt% dilute hydrochloric acid for 2min to remove surface oxides, cleaning with deionized water, and naturally drying to obtain a pretreated copper mesh; and (2) immersing the pretreated copper mesh into the gel pre-polymerization solution obtained in the step (1), and carrying out in-situ polymerization reaction for 5min at room temperature (about 25 ℃) to obtain a hydrogel (D8S 2 for short) modified hydrophilic filter screen, namely an oil-water separation filter screen.
Comparative example 1
The preparation process provided in example 1 was used with the difference that: simply using DEA, i.e., replacing DMAPS with an equimolar amount of DEA; obtaining the hydrogel (PDEA for short) modified hydrophilic filter screen.
Comparative example 2
The preparation process provided in example 1 was used with the difference that: simply adopt DMAPS, namely, replace DEA with equimolar amount of DMAPS; obtaining the hydrogel (PDMAPS for short) modified hydrophilic filter screen.
And (3) performance testing:
(1) respectively carrying out performance tests on the oil-water separation filter screen provided by the embodiment 1 of the invention in water, dilute salt (1 wt% of calcium chloride) and concentrated salt (25 wt% of calcium chloride); the results are shown in FIG. 1, wherein a is a schematic diagram of a brief process of the preparation method of example 1 of the present invention, and b-d are graphs of the test results of the oil-water separation filter screen prepared in example 1 of the present invention in water, dilute salt (1 wt% calcium chloride) and concentrated salt (25 wt% calcium chloride), respectively; as can be seen from fig. 1, the oil-water separation filter screen provided in example 1 of the present invention shows significant underwater oleophobic and even super oleophobic properties in water, dilute salt (1 wt% calcium chloride) and concentrated salt (25 wt% calcium chloride).
(2) N-dodecane is used as oil for detecting the oil adhesion resistance, and the oil adhesion resistance of the oil-water separation filter screen provided in the embodiment 1 and the hydrogel-modified hydrophilic filter screens provided in the comparative examples 1-2 are respectively tested; the results are shown in fig. 2, wherein a is a graph of the test results of the oil-water separation filter screen provided in example 1 in water, dilute salt (1 wt% calcium chloride) and concentrated salt (25 wt% calcium chloride), and b is a graph of the oil-water separation filter screen provided in example 1 and the hydrogel-modified hydrophilic filter screens provided in comparative examples 1-2 for comparing the oil-adhesion resistance; as can be seen from fig. 2, the oil-water separation strainer provided in example 1 of the present invention has low adhesion, and has excellent oil adhesion resistance in water, dilute salt (1 wt% calcium chloride), and concentrated salt (25 wt% calcium chloride).
(3) An oil-water separation device is adopted to respectively test the separation efficiency of the oil-water separation filter screen provided by the embodiment 1 of the invention and the hydrogel modified hydrophilic filter screens provided by the comparative examples 1-2; the results are shown in fig. 3, wherein a to c are schematic diagrams of a separation process based on a simple oil-water separation device, d is a graph comparing separation efficiencies of the oil-water separation filter screen provided in example 1 and the hydrogel-modified hydrophilic filter screens provided in comparative examples 1 to 2, and e is a graph showing a separation effect of the oil-water separation filter screen prepared in example 1 on different organic solvents. As can be seen from fig. 3, compared with the pure PDEA-modified copper mesh and PDMAPS-modified copper mesh, the oil-water separation filter screen provided in embodiment 1 of the present invention has higher separation efficiency, and both the separation efficiency is greater than 98%; in addition, the oil-water separation filter screen provided by the embodiment 1 of the invention has a better separation effect on different organic solvents (such as n-decane and n-butyl methacrylate).
(4) Respectively carrying out a film forming stability test on the oil-water separation filter screen provided by the embodiment 1 of the invention and the hydrogel modified hydrophilic filter screens provided by the comparative examples 1-2; the results are shown in FIG. 4. As can be seen from fig. 4, the oil-water separation filter screen provided in example 1 of the present invention has very good film forming stability, and the integrity of the film layer is still maintained after the ultrasonic treatment for half an hour and then the heating in hot water at 90 ℃.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. A preparation method of an oil-water separation filter screen comprises the following steps:
a) uniformly mixing N, N-diethyl acrylamide, [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide, a cross-linking agent and an initiator in water, introducing nitrogen to remove oxygen, and then placing at 1-5 ℃ to obtain a gel pre-polymerization solution; the cross-linking agent is selected from one or more of methylene bisacrylamide, polyethylene glycol dimethacrylate and magnesium aluminum silicate; the dosage of the cross-linking agent is 0.1-0.5% of the total mass of N, N-diethyl acrylamide and [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide; the molar ratio of the N, N-diethylacrylamide to the [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide is (3-5): 1; the initiator is selected from one or more of ammonium persulfate, potassium persulfate and azodiisobutyl amidine hydrochloride;
b) immersing a copper mesh into the gel pre-polymerization liquid obtained in the step a), and carrying out in-situ polymerization to obtain an oil-water separation filter screen; the temperature of the in-situ polymerization is 20-30 ℃, and the time is 1-10 min.
2. The method of claim 1, wherein the amount of the initiator used in step a) is 0.6 to 1.2% by mass based on the total mass of N, N-diethylacrylamide and [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide.
3. The method according to claim 1, wherein the amount of water used in step a) is 200 to 400% by mass based on the total mass of N, N-diethylacrylamide and [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide.
4. The method according to claim 1, wherein before the step b) of immersing the copper mesh into the gel pre-polymerization solution obtained in step a), the method further comprises:
pretreating the copper mesh; the pretreatment process specifically comprises the following steps:
soaking the copper net in 0.5-2 wt% of dilute hydrochloric acid for 1-5 min to remove surface oxides, then cleaning with water, and naturally drying to obtain the pretreated copper net.
5. An oil-water separation filter screen, characterized by being prepared by the preparation method of any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010896339.XA CN111974026B (en) | 2020-08-31 | 2020-08-31 | Oil-water separation filter screen and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010896339.XA CN111974026B (en) | 2020-08-31 | 2020-08-31 | Oil-water separation filter screen and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111974026A CN111974026A (en) | 2020-11-24 |
| CN111974026B true CN111974026B (en) | 2022-03-01 |
Family
ID=73440464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010896339.XA Active CN111974026B (en) | 2020-08-31 | 2020-08-31 | Oil-water separation filter screen and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111974026B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117024673A (en) * | 2023-08-14 | 2023-11-10 | 西北师范大学 | Super absorbent polymer and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109294142B (en) * | 2018-11-15 | 2021-03-30 | 湖北大学 | Hydrogel and oil-water separator as well as preparation method and application thereof |
| CN110128596A (en) * | 2019-07-12 | 2019-08-16 | 苏州宏久航空防热材料科技有限公司 | A kind of stretchable self-healing ionic conduction Nanometer composite hydrogel of high transparency and preparation method thereof |
-
2020
- 2020-08-31 CN CN202010896339.XA patent/CN111974026B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111974026A (en) | 2020-11-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Haleem et al. | A systematic review on new advancement and assessment of emerging polymeric cryogels for environmental sustainability and energy production | |
| CN109092087A (en) | A kind of graphene oxide modified polyamide composite nanometer filtering film and preparation method thereof | |
| CN111974026B (en) | Oil-water separation filter screen and preparation method thereof | |
| CN105999768A (en) | Hydrophilic-oleophobic material, and preparation method and application thereof | |
| CN112744896B (en) | Photocatalytic oil-water separation material and preparation method thereof | |
| CN108339410B (en) | Polyion liquid modified three-dimensional structure net film and preparation method and application thereof | |
| CN105217781A (en) | A kind of natural polymer subbase material for water treatment and preparation method thereof | |
| Zhao et al. | Molecular design of chlorine-resistant polymer for pervaporation desalination | |
| CN116351254A (en) | Preparation method of solvent-resistant anion exchange membrane with cross-linked structure | |
| CN114669205A (en) | Ni-Fe bimetal MOF crystal layer polysulfone composite nanofiltration membrane and preparation method thereof | |
| CN108159902B (en) | Preparation method of chelate polyacrylonitrile hollow fiber membrane | |
| CN114426680B (en) | Thermal response polyionic liquid hydrogel for desalting brine | |
| CN111318181B (en) | Durable underwater super-oleophobic composite membrane and preparation method and application thereof | |
| CN110801739B (en) | Blending modification method of polyvinylidene fluoride membrane | |
| CN102580587A (en) | Capsaicin functional-group containing hydrophilic anti-biological-contamination ultrafiltration membrane and preparation method thereof | |
| CN105727770A (en) | Preparation method of fluorine-containing anti-pollution ultrafiltration membrane, fluorine-containing anti-pollution ultrafiltration membrane and application | |
| CN112044275B (en) | Charge gradient hydrogel film for thermal seawater desalination and preparation method thereof | |
| CN112047427A (en) | Oil-water separation membrane with ion responsiveness, and preparation method and application thereof | |
| CN115282794A (en) | Pollution-resistant reverse osmosis membrane for seawater desalination and preparation method thereof | |
| CN103157449B (en) | Composite film and preparation method thereof | |
| CN110585762B (en) | Polymer oil absorption material and preparation method thereof | |
| CN112646172A (en) | Nano titanium dioxide modified polyamide 6 composite filter membrane material and preparation method thereof | |
| CN113019160A (en) | Titanium dioxide modified film and preparation method thereof | |
| CN110642977A (en) | preparation and application of pH-responsive hydrophobic oleophobic-hydrophilic oleophobic reversible transition material | |
| CN111589426A (en) | Preparation method of hydroxyl-containing conjugated microporous polymer/melamine composite sponge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |