CN114192001A - Anti-pollution composite reverse osmosis membrane for sewage treatment and preparation method thereof - Google Patents
Anti-pollution composite reverse osmosis membrane for sewage treatment and preparation method thereof Download PDFInfo
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- CN114192001A CN114192001A CN202111531135.7A CN202111531135A CN114192001A CN 114192001 A CN114192001 A CN 114192001A CN 202111531135 A CN202111531135 A CN 202111531135A CN 114192001 A CN114192001 A CN 114192001A
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- 239000012528 membrane Substances 0.000 title claims abstract description 109
- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 108
- 239000002131 composite material Substances 0.000 title claims abstract description 43
- 239000010865 sewage Substances 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000004952 Polyamide Substances 0.000 claims abstract description 60
- 229920002647 polyamide Polymers 0.000 claims abstract description 60
- 210000004379 membrane Anatomy 0.000 claims abstract description 59
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229920002873 Polyethylenimine Polymers 0.000 claims abstract description 21
- 239000000243 solution Substances 0.000 claims abstract description 19
- 239000007864 aqueous solution Substances 0.000 claims abstract description 17
- WZCQRUWWHSTZEM-UHFFFAOYSA-N 1,3-phenylenediamine Chemical compound NC1=CC=CC(N)=C1 WZCQRUWWHSTZEM-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000004593 Epoxy Substances 0.000 claims abstract description 14
- UWCPYKQBIPYOLX-UHFFFAOYSA-N benzene-1,3,5-tricarbonyl chloride Chemical compound ClC(=O)C1=CC(C(Cl)=O)=CC(C(Cl)=O)=C1 UWCPYKQBIPYOLX-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229940018564 m-phenylenediamine Drugs 0.000 claims abstract description 14
- 210000002469 basement membrane Anatomy 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000001035 drying Methods 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 8
- 239000008367 deionised water Substances 0.000 claims abstract description 8
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 8
- 230000002194 synthesizing effect Effects 0.000 claims abstract description 8
- 238000007654 immersion Methods 0.000 claims abstract description 3
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 150000001263 acyl chlorides Chemical group 0.000 claims description 6
- 238000006116 polymerization reaction Methods 0.000 claims description 6
- 230000035484 reaction time Effects 0.000 claims description 2
- 230000004048 modification Effects 0.000 abstract description 7
- 238000012986 modification Methods 0.000 abstract description 7
- 239000003607 modifier Substances 0.000 abstract description 2
- 238000005406 washing Methods 0.000 abstract description 2
- 238000011109 contamination Methods 0.000 description 5
- 238000000576 coating method Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 229920000587 hyperbranched polymer Polymers 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 238000009285 membrane fouling Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- 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
- B01D71/76—Macromolecular material not specifically provided for in a single one of groups B01D71/08 - B01D71/74
- B01D71/82—Macromolecular material not specifically provided for in a single one of groups B01D71/08 - B01D71/74 characterised by the presence of specified groups, e.g. introduced by chemical after-treatment
-
- 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
- B01D67/0002—Organic membrane manufacture
-
- 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
- B01D67/0081—After-treatment of organic or inorganic membranes
- B01D67/0093—Chemical modification
-
- 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
-
- 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
- B01D69/125—In situ manufacturing by polymerisation, polycondensation, cross-linking or chemical reaction
-
- 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
- B01D71/56—Polyamides, e.g. polyester-amides
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention belongs to the technical field of reverse osmosis membranes, and particularly relates to an anti-pollution composite reverse osmosis membrane for sewage treatment and a preparation method thereof, wherein the preparation method comprises the following steps: synthesizing and preparing a polyamide reverse osmosis basement membrane by utilizing m-phenylenediamine and trimesoyl chloride; placing the obtained base film in a container, pouring the polyethyleneimine aqueous solution into the container, and completely immersing the base film; pouring out the solution after immersion, draining the base film, and then adding deionized water for washing; placing the cleaned base film in a reactor, and drying at low temperature; and adding the epoxy butanol aqueous solution into the reactor, and reacting to obtain the anti-pollution composite reverse osmosis membrane. According to the method, the surface of the polyamide reverse osmosis base membrane is modified by using the polyethyleneimine as a connecting agent and the epoxy butanol as a modifier, so that the anti-pollution composite reverse osmosis membrane is obtained after modification, and compared with the polyamide reverse osmosis base membrane before modification, the surface hydrophilicity and the anti-pollution performance of the anti-pollution composite reverse osmosis membrane are greatly improved.
Description
Technical Field
The invention belongs to the technical field of reverse osmosis membranes, and particularly relates to an anti-pollution composite reverse osmosis membrane for sewage treatment and a preparation method thereof.
Background
The reverse osmosis membrane filtration technology is a liquid separation technology with high efficiency, low energy and easy operation, has better effect than the traditional water treatment method, and can realize seawater desalination, cyclic utilization of waste water and effective recovery of useful substances. The reverse osmosis membrane is very easy to be attacked by biological pollution in the using process, so that the membrane performance is irreversibly reduced, and the prepared reverse osmosis membrane with the sterilization function can effectively relieve the problem of membrane biological pollution. General membrane fouling refers to irreversible membrane flux reduction caused by blocking membrane pore channels by pollutants, reversible membrane flux reduction caused by concentration polarization and filter cake compression, and separation rate reduction caused by physical damage and chemical damage of membranes caused by other factors. The pollution can be divided into two types of organic matter adsorption pollution and inorganic matter precipitation pollution, and the two types are accompanied and acted together in actual operation. At present, the development of pollution-resistant membranes is mainly divided into two main types, namely composite coatings and membrane surface modification. The composite coating is formed by coating a film on the surface of the reverse osmosis membrane by utilizing high molecules such as polyvinyl alcohol, polyether and the like.
Patent specification with publication number CN108246129A discloses an anti-pollution composite reverse osmosis membrane for sewage treatment and a preparation method thereof. The composite reverse osmosis membrane is prepared by the following steps: a. mixing water-soluble hyperbranched polymer and hydrophilic nano TiO2And surfactant are dissolved in water to prepare mixed solution; b. coating the mixed solution on the surface of a polyamide substrate reverse osmosis membrane to prepare a composite reverse osmosis membrane; c. after the amphiphilic modification is realized by ultraviolet irradiation treatment, the anti-pollution composite reverse osmosis membrane for sewage treatment can be obtained.
However, the anti-pollution composite reverse osmosis membrane has the defects that the surface hydrophilicity and the anti-pollution performance are not ideal enough, and optimization and improvement are needed.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides an anti-pollution composite reverse osmosis membrane for sewage treatment and a preparation method thereof.
In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:
a preparation method of an anti-pollution composite reverse osmosis membrane for sewage treatment comprises the following steps:
1) synthesizing m-phenylenediamine and trimesoyl chloride to prepare a polyamide reverse osmosis basement membrane, wherein unreacted acyl chloride groups are formed on the surface of the polyamide reverse osmosis basement membrane after the polymerization of the m-phenylenediamine and trimesoyl chloride interface is completed;
2) placing the obtained polyamide reverse osmosis basal membrane in a container, pouring a polyethyleneimine water solution serving as a connecting agent into the container, and completely immersing the polyamide reverse osmosis basal membrane; pouring out the solution after immersing for a period of time, draining the polyamide reverse osmosis base membrane, adding deionized water to wash the surface of the polyamide reverse osmosis base membrane for 2-3 times, and removing unreacted polyethyleneimine;
3) placing the cleaned polyamide reverse osmosis base membrane in a reactor, and then placing the reactor in a drying oven to dry the base membrane at a low temperature;
4) and adding an epoxy butanol aqueous solution with a certain concentration into the reactor, increasing the temperature of the oven to the reaction temperature, and reacting for a period of time at the temperature to obtain the anti-pollution composite reverse osmosis membrane.
Further, in the method for preparing the anti-pollution composite reverse osmosis membrane for sewage treatment, in the step 2), the mass fraction of the polyethyleneimine aqueous solution is 0.6%.
Further, in the preparation method of the anti-pollution composite reverse osmosis membrane for sewage treatment, in the step 2), the immersion time is 4-8 min.
Further, in the preparation method of the anti-pollution composite reverse osmosis membrane for sewage treatment, in the step 3), the low-temperature drying temperature is 60-80 ℃, and the low-temperature drying is carried out until the water content on the surface of the polyamide reverse osmosis base membrane is lower than 5%.
Further, in the preparation method of the anti-pollution composite reverse osmosis membrane for sewage treatment, in the step 4), the reaction temperature is 92-96 ℃, and the reaction time is 20-40 min.
Further, in the method for preparing the anti-pollution composite reverse osmosis membrane for sewage treatment, in the step 4), the mass fraction of the epoxy butanol aqueous solution is 1.2%.
Further, in the method for preparing the anti-pollution composite reverse osmosis membrane for sewage treatment as described above, in the step 4), the excess epoxy butanol aqueous solution is poured out after the reaction is finished.
An anti-pollution composite reverse osmosis membrane for sewage treatment is prepared by the preparation method.
The invention has the beneficial effects that:
according to the method, the surface of the polyamide reverse osmosis base membrane is modified by using the polyethyleneimine as a connecting agent and the epoxy butanol as a modifier, so that the anti-pollution composite reverse osmosis membrane is obtained after modification, and compared with the polyamide reverse osmosis base membrane before modification, the surface hydrophilicity and the anti-pollution performance of the anti-pollution composite reverse osmosis membrane are greatly improved.
Of course, it is not necessary for any one product that embodies the invention to achieve all of the above advantages simultaneously.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
A preparation method of an anti-pollution composite reverse osmosis membrane for sewage treatment comprises the following steps:
1) synthesizing m-phenylenediamine and trimesoyl chloride to prepare a polyamide reverse osmosis basement membrane, wherein unreacted acyl chloride groups are formed on the surface of the polyamide reverse osmosis basement membrane after the polymerization of the m-phenylenediamine and trimesoyl chloride interface is completed;
2) placing the obtained polyamide reverse osmosis basal membrane in a container, pouring a polyethyleneimine water solution serving as a connecting agent into the container, and completely immersing the polyamide reverse osmosis basal membrane, wherein the mass fraction of the polyethyleneimine water solution is 0.6%; immersing for 4-8min, pouring out the solution, draining the polyamide reverse osmosis base membrane, adding deionized water to wash the surface of the polyamide reverse osmosis base membrane for 2-3 times, and removing unreacted polyethyleneimine;
3) placing the cleaned polyamide reverse osmosis base membrane in a reactor, then placing the reactor in a drying oven to dry the base membrane at a low temperature of 60-80 ℃ until the water content of the surface of the polyamide reverse osmosis base membrane is lower than 5%;
4) adding 1.2 mass percent of epoxy butanol aqueous solution into a reactor, increasing the temperature of an oven to 92-96 ℃, and reacting for 20-40min at the temperature to obtain the anti-pollution composite reverse osmosis membrane; after the reaction, the excess aqueous solution of epoxybutanol was poured out.
The following embodiments are relevant to the present invention:
example 1
A preparation method of an anti-pollution composite reverse osmosis membrane for sewage treatment comprises the following steps:
1) synthesizing m-phenylenediamine and trimesoyl chloride to prepare a polyamide reverse osmosis basement membrane, wherein unreacted acyl chloride groups are formed on the surface of the polyamide reverse osmosis basement membrane after the polymerization of the m-phenylenediamine and trimesoyl chloride interface is completed;
2) placing the obtained polyamide reverse osmosis basal membrane in a container, pouring a polyethyleneimine water solution serving as a connecting agent into the container, and completely immersing the polyamide reverse osmosis basal membrane, wherein the mass fraction of the polyethyleneimine water solution is 0.6%; immersing for 4min, pouring out the solution, draining the polyamide reverse osmosis base membrane, adding deionized water to wash the surface of the polyamide reverse osmosis base membrane for 2 times, and removing unreacted polyethyleneimine;
3) placing the cleaned polyamide reverse osmosis base membrane in a reactor, then placing the reactor in a drying oven to dry the base membrane at a low temperature of 60 ℃ until the water content of the surface of the polyamide reverse osmosis base membrane is lower than 5%;
4) adding an epoxy butanol aqueous solution with the mass fraction of 1.2% into a reactor, increasing the temperature of an oven to 94 ℃, and reacting for 30min at the temperature to obtain the anti-pollution composite reverse osmosis membrane; after the reaction, the excess aqueous solution of epoxybutanol was poured out.
Example 2
A preparation method of an anti-pollution composite reverse osmosis membrane for sewage treatment comprises the following steps:
1) synthesizing m-phenylenediamine and trimesoyl chloride to prepare a polyamide reverse osmosis basement membrane, wherein unreacted acyl chloride groups are formed on the surface of the polyamide reverse osmosis basement membrane after the polymerization of the m-phenylenediamine and trimesoyl chloride interface is completed;
2) placing the obtained polyamide reverse osmosis basal membrane in a container, pouring a polyethyleneimine water solution serving as a connecting agent into the container, and completely immersing the polyamide reverse osmosis basal membrane, wherein the mass fraction of the polyethyleneimine water solution is 0.6%; immersing for 6min, pouring out the solution, draining the polyamide reverse osmosis base membrane, adding deionized water to wash the surface of the polyamide reverse osmosis base membrane for 3 times, and removing unreacted polyethyleneimine;
3) placing the cleaned polyamide reverse osmosis base membrane in a reactor, then placing the reactor in a drying oven to dry the base membrane at a low temperature of 70 ℃ until the water content of the surface of the polyamide reverse osmosis base membrane is lower than 5%;
4) adding an epoxy butanol aqueous solution with the mass fraction of 1.2% into a reactor, increasing the temperature of an oven to 96 ℃, and reacting for 20min at the temperature to obtain the anti-pollution composite reverse osmosis membrane; after the reaction, the excess aqueous solution of epoxybutanol was poured out.
Example 3
A preparation method of an anti-pollution composite reverse osmosis membrane for sewage treatment comprises the following steps:
1) synthesizing m-phenylenediamine and trimesoyl chloride to prepare a polyamide reverse osmosis basement membrane, wherein unreacted acyl chloride groups are formed on the surface of the polyamide reverse osmosis basement membrane after the polymerization of the m-phenylenediamine and trimesoyl chloride interface is completed;
2) placing the obtained polyamide reverse osmosis basal membrane in a container, pouring a polyethyleneimine water solution serving as a connecting agent into the container, and completely immersing the polyamide reverse osmosis basal membrane, wherein the mass fraction of the polyethyleneimine water solution is 0.6%; immersing for 8min, pouring out the solution, draining the polyamide reverse osmosis base membrane, adding deionized water to wash the surface of the polyamide reverse osmosis base membrane for 2 times, and removing unreacted polyethyleneimine;
3) placing the cleaned polyamide reverse osmosis base membrane in a reactor, then placing the reactor in a drying oven to dry the base membrane at a low temperature of 80 ℃, and drying at the low temperature until the water content on the surface of the polyamide reverse osmosis base membrane is lower than 5%;
4) adding an epoxy butanol aqueous solution with the mass fraction of 1.2% into a reactor, increasing the temperature of an oven to 92 ℃, and reacting for 40min at the temperature to obtain the anti-pollution composite reverse osmosis membrane; after the reaction, the excess aqueous solution of epoxybutanol was poured out.
Comparative example
A reverse osmosis membrane is prepared by synthesizing m-phenylenediamine and trimesoyl chloride to prepare a polyamide reverse osmosis membrane, and washing the surface of the polyamide reverse osmosis membrane for 3 times by deionized water.
When the anti-pollution composite reverse osmosis membrane prepared in the example 1-3 is used as a sample to be subjected to an infrared test, a hydroxyl (-OH) stretching vibration peak appears at 3420cm < -1 >, which indicates that the epoxy butanol is successfully grafted to the surface of the polyamide membrane.
The anti-contamination composite reverse osmosis membranes prepared in examples 1 to 3 and the polyamide reverse osmosis membrane provided in the comparative example were used as samples to conduct the hydrophilic property test, and the results are shown in the following table 1:
TABLE 1
| Detecting items | Comparative example | Example 1 | Example 2 | Example 3 |
| Contact angle | 74.5° | 47.3° | 46.8° | 47.7° |
As can be seen from the contact angle test data in Table 1, the contact angle of the anti-pollution composite reverse osmosis membrane is reduced by nearly 40% relative to the polyamide reverse osmosis membrane, and the hydrophilicity of the anti-pollution composite reverse osmosis membrane is remarkably improved.
The anti-contamination performance was measured using the anti-contamination composite reverse osmosis membranes prepared in examples 1 to 3 and the polyamide reverse osmosis membrane provided in the comparative example as samples, and the results are shown in the following table 2:
TABLE 2
Protein is used as turbid matter to carry out an anti-pollution test, and water flux detection is carried out according to a GB/T32373-2015 reverse osmosis membrane test method. As can be seen from Table 2, the water flux recovery rate of the anti-contamination composite reverse osmosis membrane was improved, and the anti-contamination performance was improved.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (8)
1. A preparation method of an anti-pollution composite reverse osmosis membrane for sewage treatment is characterized by comprising the following steps:
1) synthesizing m-phenylenediamine and trimesoyl chloride to prepare a polyamide reverse osmosis basement membrane, wherein unreacted acyl chloride groups are formed on the surface of the polyamide reverse osmosis basement membrane after the polymerization of the m-phenylenediamine and trimesoyl chloride interface is completed;
2) placing the obtained polyamide reverse osmosis basal membrane in a container, pouring a polyethyleneimine water solution serving as a connecting agent into the container, and completely immersing the polyamide reverse osmosis basal membrane; pouring out the solution after immersing for a period of time, draining the polyamide reverse osmosis base membrane, adding deionized water to wash the surface of the polyamide reverse osmosis base membrane for 2-3 times, and removing unreacted polyethyleneimine;
3) placing the cleaned polyamide reverse osmosis base membrane in a reactor, and then placing the reactor in a drying oven to dry the base membrane at a low temperature;
4) and adding an epoxy butanol aqueous solution with a certain concentration into the reactor, increasing the temperature of the oven to the reaction temperature, and reacting for a period of time at the temperature to obtain the anti-pollution composite reverse osmosis membrane.
2. The method of claim 1, wherein: in the step 2), the mass fraction of the polyethyleneimine water solution is 0.6%.
3. The method of claim 1, wherein: in the step 2), the immersion time is 4-8 min.
4. The method of claim 1, wherein: in the step 3), the low-temperature drying temperature is 60-80 ℃, and the low-temperature drying is carried out until the water content on the surface of the polyamide reverse osmosis base membrane is lower than 5%.
5. The method of claim 1, wherein: in the step 4), the reaction temperature is 92-96 ℃, and the reaction time is 20-40 min.
6. The method of claim 1, wherein: in the step 4), the mass fraction of the epoxy butanol aqueous solution is 1.2%.
7. The method of claim 1, wherein: in the step 4), pouring out the redundant epoxy butanol aqueous solution after the reaction is finished.
8. An anti-pollution composite reverse osmosis membrane for sewage treatment, which is prepared by the preparation method of any one of claims 1 to 7.
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| KR20130008916A (en) * | 2011-07-13 | 2013-01-23 | 한남대학교 산학협력단 | Chlorine resistant and fouling resistant polyamide reverse osmosis composite membrane and manufacturing method thereof |
| CN109621752A (en) * | 2019-01-08 | 2019-04-16 | 哈尔滨工业大学 | A kind of preparation method of hydrophilic anti-pollution aromatic polyamides reverse osmosis membrane |
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- 2021-12-14 CN CN202111531135.7A patent/CN114192001A/en active Pending
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| KR100781625B1 (en) * | 2006-12-11 | 2007-12-05 | 주식회사 새 한 | Producing method of the polyamide reverse osmosis membrane having fouling resistence and improved durability |
| KR20130008916A (en) * | 2011-07-13 | 2013-01-23 | 한남대학교 산학협력단 | Chlorine resistant and fouling resistant polyamide reverse osmosis composite membrane and manufacturing method thereof |
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Non-Patent Citations (1)
| Title |
|---|
| 林晓红;张红梨;高玉冰;伍丽萍;陈立业;盖景刚;: "抗污染环氧丙醇复合反渗透膜", 高分子材料科学与工程, vol. 34, no. 08, pages 124 - 128 * |
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