CN108246129A - A kind of sewage disposal antipollution complex reverse osmosis membrane and preparation method thereof - Google Patents
A kind of sewage disposal antipollution complex reverse osmosis membrane and preparation method thereof Download PDFInfo
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- CN108246129A CN108246129A CN201810192738.0A CN201810192738A CN108246129A CN 108246129 A CN108246129 A CN 108246129A CN 201810192738 A CN201810192738 A CN 201810192738A CN 108246129 A CN108246129 A CN 108246129A
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- reverse osmosis
- osmosis membrane
- sewage disposal
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- antipollution
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/025—Reverse osmosis; Hyperfiltration
-
- 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
- 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
-
- 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
Abstract
The invention discloses a kind of sewage disposal antipollution complex reverse osmosis membranes and preparation method thereof.The complex reverse osmosis membrane is made by following steps：A, by water-soluble ultrabranching polymer, hydrophilic nano TiO2It is soluble in water with surfactant, mixed liquor is made；B, mixed liquor is coated on to the surface of polyamide substrate reverse osmosis membrane, complex reverse osmosis membrane is made；C, it is realized using ultraviolet light irradiation processing amphiphilic modified, you can obtain sewage disposal antipollution complex reverse osmosis membrane.The method has the advantages that：Nano-titanium dioxide is uniformly dispersed and is embedded in dissaving polymer film, not easily to fall off securely coated on polyamide substrate, antifouling property is good, and preparation process is simple to operation, and technical process environmental protection, production cost is low, has fabulous application prospect.
Description
Technical field
The present invention relates to sewage treatment fields, and in particular to the preparation of reverse osmosis membrane, more particularly, to a kind of sewage disposal
With antipollution complex reverse osmosis membrane and preparation method thereof.
Background technology
Reverse osmosis membrane filtration technology is a kind of efficient, low energy and easy-operating liquid separation technology, than traditional water process
Method effect is good, it can be achieved that sea water desalination, waste water recycling and utility effectively recycled.By over half a century
Development, reverse osmosis membrane application field are expanded from traditional sea water desalination, bitter desalination to food processing, industrial extra-pure water life
The processing of the industrial wastewaters such as production and papermaking, plating, petrochemical industry, pharmacy, printing and dyeing and city domestic sewage.With its application neck
The expansion in domain, membrane pollution problem are shown especially increasingly.
Reverse osmosis membrane is highly prone to the invasion of biological pollution in use, causes the irreversible decline of film properties, prepares
Reverse osmosis membrane with sterilizing function can effectively alleviate membrane biological pollution problem.General fouling membrane refers to pollutant and blocks fenestra road
Caused irreversible flux depression, reversible flux depression and other factors cause caused by concentration polarization, filter cake compression
The physical damnification and chemical damage of film make separation rate decline etc..It can be divided into organic matter absorption pollution, inorganic matter precipitation pollution two
Type, mostly in actual motion is that both types occur together, collective effect.At present, the exploitation of anti-pollution film is broadly divided into
Two major class modes, i.e. composite coating class and film surface are modified class.Composite coating class is anti-using macromolecules such as polyvinyl alcohol, polyethers
Permeate film surface re-coating thin film.Simplification and the performance of preparation process are at present concentrated mainly on to the research of reverse osmosis membrane
It is promoted.
Number of patent application 201410419162.9 discloses a kind of preparation method of anti-pollution reverse osmosis membrane, including：（1）Make
With metal-plated embrane method by metallising on slide glass；（2）The slide glass for being coated with metal is placed in progress ultrasonic disperse in solvent to obtain
Nano metal suspension；（3）Reverse osmosis membrane is placed in step（2）In in obtained nano metal suspension and carry out ultrasound obtain it is described
Anti-pollution reverse osmosis membrane.The invention further relates to the anti-pollution reverse osmosis membrane that a kind of the method is prepared.
Number of patent application 201611122503.1 discloses a kind of preparation method of anti-pollution reverse osmosis membrane, including following step
Suddenly：By reverse osmosis membrane base material it is plasma treated after；By being reacted in trimethoxysilane coupling agent pretreatment fluid, pretreatment fluid
For trimethoxysilane coupling agent；It is handled using anti-pollution coating liquid, anti-pollution coating liquid is that solute is 17 fluorine decyl, three ethoxy
Base silane and/or tridecafluoro-n-octyltriethoxysilane and solvent are the solution of perfluoropolyether；Then to reverse osmosis membrane base material into
Row drying and processing obtains anti-pollution reverse osmosis membrane.The preparation facilities of the anti-pollution reverse osmosis membrane is also disclosed in the invention.Present invention system
Standby reverse osmosis membrane has good pure water flux and salt rejection rate, realizes the effect of efficient anti-pollution, extends the use of reverse osmosis membrane
Service life.
Number of patent application 201110267355.3 disclose it is a kind of strengthen reverse osmosis membrane contamination resistance method, including with
In the reverse osmosis membrane of Treated sewage reusing, tap water purifying, sea water desalination and various wastewater treatments, this method is by the ring containing heterocycle
Oxygen, polyether polyol or polyamine, curing agent, catalyst and crosslinking agent etc. are hybridly prepared into aqueous solution and coated on reverse osmosis membranes
Desalination layer surface.Be heat-treated at a certain temperature, make epoxy etc. reverse osmosis membrane surface carry out in-situ solidifying, and part with
The active site of reverse osmosis film surface carries out reaction and forms chemical graft, so as to form firm anti-pollution layer in reverse osmosis film surface.It is logical
The smoothness of film surface, hydrophily, resistant to washing can be effectively improved and reduce film surface by crossing the anti-pollution layer that is formed after in-situ solidifying grafting
Charged quantity enhances the contamination resistance of reverse osmosis membrane.Experiment shows that the anti-pollution layer can make the anti-pollution of corresponding reverse osmosis membrane
Contaminate capability improving about 50%.
Number of patent application 201210179678.1 discloses a kind of nano-porous ceramic complex reverse osmosis membrane and its preparation side
Method, nano-porous ceramic complex reverse osmosis membrane include high-molecular porous support membrane and are uniformly compounded in described high-molecular porous
The polyamide functional layer of film surface is supported, porous TiO is evenly distributed in polyamide functional layer2Ceramic nanoparticles.The invention
Preparation method：By porous TiO2Ceramic nanoparticles add in base soln, make the porous TiO2Ceramic nanoparticles uniformly disperse
In the base soln, function solution is made；The function is solution combined to high-molecular porous support film surface, it is received
Rice porous ceramics complex reverse osmosis membrane.The nano-porous ceramic complex reverse osmosis membrane membrane flux of the invention is big, rejection is high, resistant
Dye, easy cleaning；And the method for preparing nano-porous ceramic complex reverse osmosis membrane is simple, convenient and practical.
It can be seen that in the prior art in polyamide composite reverse osmosis membrane vulnerable to pollution, surface coating or crosslinked polyethylene
Alcohol can improve its antifouling property, but due to cross-linking polyvinyl alcohol dissolves difficulty, must be through higher temperature heat treatment etc., cause
Polyamide composite reverse osmosis membrane modified technique is complicated, and the feature of environmental protection is poor, the problems such as not meeting social development demand.
Invention content
Effectively to solve above-mentioned technical problem, the present invention propose a kind of sewage disposal antipollution complex reverse osmosis membrane and
Preparation method, while can effectively solving fouling membrane, simple for process and good environmental protection.
The specific technical solution of the present invention is as follows：
A kind of preparation method of sewage disposal antipollution complex reverse osmosis membrane, the antipollution complex reverse osmosis membrane is received by containing
Rice TiO2Water-soluble ultrabranching polymer solution, the surface of plasma treated polyamide substrate reverse osmosis membrane coat,
Dissaving polymer film is formed, further to nano-TiO2Coating carries out ultraviolet light irradiation processing and is made, specific to prepare step
Suddenly it is：
A, it is water-soluble ultrabranching polymer is soluble in water, add in hydrophilic nano TiO2It is mixed, is made with surfactant
Polymer molecular chain is in nano-TiO2Mixed liquor is made in surface wrap；
B, plasma treatment is carried out to polyamide substrate reverse osmosis membrane, then mixed liquor made from step a is coated on reverse osmosis membrane
Surface, formed dissaving polymer film, nano-TiO2It is uniformly embedded in dissaving polymer film, is made compound reverse osmosis
Film；
C, using ultraviolet light to the nano-TiO in complex reverse osmosis membrane made from step b2Coating carries out radiation treatment, realizes double
Parent's property is modified, and improves adhesion, then be dried, you can sewage disposal antipollution complex reverse osmosis membrane is made.
Preferably, the water-soluble ultrabranching polymer is ammonium salt class dissaving polymer or the hyperbranched polymerization of amino acid pattern
One kind in object.
Preferably, the hydrophilic nano TiO2Grain size be 5 ~ 20nm.
Preferably, the surfactant is at least one of sodium alkyl sulfonate, sodium alkyl sulfate.
Preferably, in the step a, 34 ~ 40 parts by weight of water-soluble ultrabranching polymer, hydrophilic nano TiO2 5 ~ 8 weights
Measure part, 1 ~ 2 parts by weight of surfactant, 50 ~ 60 parts by weight of water.
Preferably, a length of 280 ~ 315nm of the ultraviolet light wave of radiation treatment described in step c, irradiation distance be 0.8 ~ 1.2m, spoke
It is 10 ~ 15min according to the time.
Preferably, drying temperature described in step c is 60 ~ 70 DEG C, and the time is 10 ~ 12h.
Preferably, the thickness of the polyamide substrate reverse osmosis membrane is 0.04 ~ 0.06mm, and aperture is 0.5 ~ 1nm.
Preferably, the thickness of the dissaving polymer film is 0.02 ~ 0.05mm.
The present invention also proposes the sewage disposal antipollution complex reverse osmosis membrane that a kind of above-mentioned preparation method is prepared
The present invention is using the good dispersibility of water-soluble ultrabranching polymer solution and there are the advantages such as inner space, adds nanometer
TiO2It uniformly disperses and macromolecular chain is made it to be made uniformly to be embedded in dissaving polymer film in its surface wrap, not easily to fall off, tool
There is excellent resistance tocrocking, greatly improve circulation and filter effect.It is coated, it is acid molten without film layer is dissolved in
In liquid, easy to operate without heating, technical process is more environmentally-friendly, in terms of operation, production cost advantageously.
Beneficial effects of the present invention are：
1. propose a kind of sewage disposal antipollution complex reverse osmosis membrane.
2. propose a kind of preparation method of sewage disposal antipollution complex reverse osmosis membrane.
3. nano-titanium dioxide in preparing is uniformly dispersed and is embedded in dissaving polymer film by the present invention, securely coated on poly-
Amide base material, not easily to fall off, antifouling property is good.
4. preparation process of the present invention is simple to operation, technical process environmental protection, production cost is low, before having fabulous application
Scape.
Specific embodiment
In the following, the present invention will be further described in detail by way of specific embodiments, but this should not be interpreted as to the present invention
Range be only limitted to following example.Without departing from the idea of the above method of the present invention, according to ordinary skill
The various replacements or change that knowledge and customary means are made, should be included in the scope of the present invention.
Embodiment 1
A, it is water-soluble ultrabranching polymer is soluble in water, add in hydrophilic nano TiO2It is mixed, is made with surfactant
Polymer molecular chain is in nano-TiO2Mixed liquor is made in surface wrap；
B, plasma treatment is carried out to polyamide substrate reverse osmosis membrane, then mixed liquor made from step a is coated on reverse osmosis membrane
Surface, be made complex reverse osmosis membrane；
C, using ultraviolet light to the nano-TiO in complex reverse osmosis membrane made from step b2Coating carries out radiation treatment, then carries out
It is dry, you can sewage disposal antipollution complex reverse osmosis membrane is made.
Water-soluble ultrabranching polymer is ammonium salt class dissaving polymer；Hydrophilic nano TiO2Average grain diameter be
12nm；Surfactant is sodium alkyl sulfonate；
In step a, 36 parts by weight of water-soluble ultrabranching polymer, hydrophilic nano TiO2 6 parts by weight, 2 weight of surfactant
Part, 56 parts by weight of water.
The ultraviolet light wave a length of 300nm, irradiation distance 1m, exposure time 13min of radiation treatment；Drying temperature is 65
DEG C, time 11h；The average thickness of polyamide substrate reverse osmosis membrane is 0.05mm, average pore size 0.8nm；Hyperbranched polymerization
The average thickness of object film is 0.03mm.
Embodiment 2
A, it is water-soluble ultrabranching polymer is soluble in water, add in hydrophilic nano TiO2It is mixed, is made with surfactant
Polymer molecular chain is in nano-TiO2Mixed liquor is made in surface wrap；
B, plasma treatment is carried out to polyamide substrate reverse osmosis membrane, then mixed liquor made from step a is coated on reverse osmosis membrane
Surface, be made complex reverse osmosis membrane；
C, using ultraviolet light to the nano-TiO in complex reverse osmosis membrane made from step b2Coating carries out radiation treatment, then carries out
It is dry, you can sewage disposal antipollution complex reverse osmosis membrane is made.
Water-soluble ultrabranching polymer is amino acid pattern dissaving polymer；Hydrophilic nano TiO2Average grain diameter be
5nm；Surfactant is sodium alklyarylsulfonate；
In step a, 34 parts by weight of water-soluble ultrabranching polymer, hydrophilic nano TiO2 5 parts by weight, 1 weight of surfactant
Part, 60 parts by weight of water.
The ultraviolet light wave a length of 280nm, irradiation distance 0.8m, exposure time 15min of radiation treatment；Drying temperature is
60 DEG C, time 12h；The average thickness of polyamide substrate reverse osmosis membrane is 0.04mm, average pore size 0.5nm；Hyperbranched poly
The average thickness of compound film is 0.02mm.
Embodiment 3
A, it is water-soluble ultrabranching polymer is soluble in water, add in hydrophilic nano TiO2It is mixed, is made with surfactant
Polymer molecular chain is in nano-TiO2Mixed liquor is made in surface wrap；
B, plasma treatment is carried out to polyamide substrate reverse osmosis membrane, then mixed liquor made from step a is coated on reverse osmosis membrane
Surface, be made complex reverse osmosis membrane；
C, using ultraviolet light to the nano-TiO in complex reverse osmosis membrane made from step b2Coating carries out radiation treatment, then carries out
It is dry, you can sewage disposal antipollution complex reverse osmosis membrane is made.
Water-soluble ultrabranching polymer is ammonium salt class dissaving polymer；Hydrophilic nano TiO2Average grain diameter be
20nm；Surfactant is sodium alkyl sulfate；
In step a, 40 parts by weight of water-soluble ultrabranching polymer, hydrophilic nano TiO28 parts by weight, 2 weight of surfactant
Part, 50 parts by weight of water.
The ultraviolet light wave a length of 315nm, irradiation distance 1.2m, exposure time 10min of radiation treatment；Drying temperature is
70 DEG C, time 10h；The average thickness of polyamide substrate reverse osmosis membrane is 0.06mm, average pore size 1nm；Hyperbranched polymerization
The average thickness 0.05mm of object film.
Embodiment 4
A, it is water-soluble ultrabranching polymer is soluble in water, add in hydrophilic nano TiO2It is mixed, is made with surfactant
Polymer molecular chain is in nano-TiO2Mixed liquor is made in surface wrap；
B, plasma treatment is carried out to polyamide substrate reverse osmosis membrane, then mixed liquor made from step a is coated on reverse osmosis membrane
Surface, be made complex reverse osmosis membrane；
C, using ultraviolet light to the nano-TiO in complex reverse osmosis membrane made from step b2Coating carries out radiation treatment, then carries out
It is dry, you can sewage disposal antipollution complex reverse osmosis membrane is made.
Water-soluble ultrabranching polymer is amino acid pattern dissaving polymer；Hydrophilic nano TiO2Average grain diameter be
8nm；Surfactant is Teepol；
In step a, 36 parts by weight of water-soluble ultrabranching polymer, hydrophilic nano TiO2 6 parts by weight, 1 weight of surfactant
Part, 57 parts by weight of water.
The ultraviolet light wave a length of 290nm, irradiation distance 0.9m, exposure time 14min of radiation treatment；Drying temperature is
62 DEG C, time 11h；The average thickness of polyamide substrate reverse osmosis membrane is 0.04mm, average pore size 0.6nm；Hyperbranched poly
The average thickness of compound film is 0.04mm.
Embodiment 5
A, it is water-soluble ultrabranching polymer is soluble in water, add in hydrophilic nano TiO2It is mixed, is made with surfactant
Polymer molecular chain is in nano-TiO2Mixed liquor is made in surface wrap；
B, plasma treatment is carried out to polyamide substrate reverse osmosis membrane, then mixed liquor made from step a is coated on reverse osmosis membrane
Surface, be made complex reverse osmosis membrane；
C, using ultraviolet light to the nano-TiO in complex reverse osmosis membrane made from step b2Coating carries out radiation treatment, then carries out
It is dry, you can sewage disposal antipollution complex reverse osmosis membrane is made.
Water-soluble ultrabranching polymer is ammonium salt class dissaving polymer；Hydrophilic nano TiO2Average grain diameter be
12nm；Surfactant is sodium alkyl sulfonate；
In step a, 38 parts by weight of water-soluble ultrabranching polymer, hydrophilic nano TiO27 parts by weight, 2 weight of surfactant
Part, 53 parts by weight of water.
The ultraviolet light wave a length of 310nm, irradiation distance 0.9m, exposure time 14min of radiation treatment；Drying temperature is
66 DEG C, time 12h；The average thickness of polyamide substrate reverse osmosis membrane is 0.06mm, average pore size 0.7nm；Hyperbranched poly
The average thickness of compound film is 0.04mm.
Comparative example 1
A, it is water-soluble ultrabranching polymer is soluble in water, it adds in surfactant and is mixed, mixed liquor is made；
B, plasma treatment is carried out to polyamide substrate reverse osmosis membrane, then mixed liquor made from step a is coated on reverse osmosis membrane
Surface, be made complex reverse osmosis membrane；
C, complex reverse osmosis membrane made from step b is dried, you can sewage disposal antipollution complex reverse osmosis membrane is made.
Water-soluble ultrabranching polymer is ammonium salt class dissaving polymer；Surfactant is sodium alkyl sulfonate；
In step a, 36 parts by weight of water-soluble ultrabranching polymer, 2 parts by weight of surfactant, 62 parts by weight of water.
Drying temperature is 65 DEG C, time 11h；The average thickness of polyamide substrate reverse osmosis membrane is 0.05mm, average hole
Diameter is 0.8nm；The average thickness of dissaving polymer film is 0.03mm.
Comparative example 2
The polyamide substrate reverse osmosis membrane selected with embodiment 5 is directly as reverse osmosis membrane.
The complex reverse osmosis membrane of above-described embodiment 1 ~ 5 and comparative example 1-2 tests membrane flux rate of descent and organic pollution
Object removal rate, method or the condition for testing characterization are as follows：
Flux depression rate：Reverse osmosis membrane is placed in organic pollution sewage and is handled for 24 hours, membrane flux test is carried out, counts respectively
The rate of descent of membrane flux is calculated, characterizes resistance tocrocking.
Organic pollutant removal rate：Complex reverse osmosis membrane is put into organic matter sewage disposal organic matter, test organic matter removes
Go rate.
The sewage of the organic pollution of above-mentioned selection is the city domestic sewage with batch.
The results are shown in Table 1.
Table 1：
Claims (10)
1. a kind of sewage disposal preparation method of antipollution complex reverse osmosis membrane, it is characterised in that：The antipollution is compound anti-
Permeable membrane is by containing nano-TiO2Water-soluble ultrabranching polymer solution, it is reverse osmosis in plasma treated polyamide substrate
The surface coating of film, forms dissaving polymer film, further to nano-TiO2Coating carries out ultraviolet light irradiation processing and is made,
Specifically preparation process is：
A, it is water-soluble ultrabranching polymer is soluble in water, add in hydrophilic nano TiO2It is mixed with surfactant, makes to gather
Adduct molecule chain is in nano-TiO2Mixed liquor is made in surface wrap；
B, plasma treatment is carried out to polyamide substrate reverse osmosis membrane, then mixed liquor made from step a is coated on reverse osmosis membrane
Surface, formed dissaving polymer film, nano-TiO2It is uniformly embedded in dissaving polymer film, is made compound reverse osmosis
Film；
C, using ultraviolet light to the nano-TiO in complex reverse osmosis membrane made from step b2Coating carries out radiation treatment, realizes parents
Property be modified, improve adhesion, then be dried, you can sewage disposal antipollution complex reverse osmosis membrane is made.
2. a kind of preparation method of sewage disposal antipollution complex reverse osmosis membrane according to claim 1, it is characterised in that：
The water-soluble ultrabranching polymer is one kind in ammonium salt class dissaving polymer or amino acid pattern dissaving polymer.
3. a kind of preparation method of sewage disposal antipollution complex reverse osmosis membrane according to claim 1, it is characterised in that：
The hydrophilic nano TiO2Grain size be 5 ~ 20nm.
4. a kind of preparation method of sewage disposal antipollution complex reverse osmosis membrane according to claim 1, it is characterised in that：
The surfactant is at least one of sodium alkyl sulfonate, sodium alkyl sulfate.
5. a kind of preparation method of sewage disposal antipollution complex reverse osmosis membrane according to claim 1, it is characterised in that：
In the step a, 34 ~ 40 parts by weight of water-soluble ultrabranching polymer, hydrophilic nano TiO2 5 ~ 8 parts by weight, surfactant 1
~ 2 parts by weight, 50 ~ 60 parts by weight of water.
6. a kind of preparation method of sewage disposal antipollution complex reverse osmosis membrane according to claim 1, it is characterised in that：
A length of 280 ~ the 315nm of the ultraviolet light wave of radiation treatment described in step c, irradiation distance are 0.8 ~ 1.2m, exposure time for 10 ~
15min。
7. a kind of preparation method of sewage disposal antipollution complex reverse osmosis membrane according to claim 1, it is characterised in that：
Drying temperature described in step c is 60 ~ 70 DEG C, and the time is 10 ~ 12h.
8. a kind of preparation method of sewage disposal antipollution complex reverse osmosis membrane according to claim 1, it is characterised in that：
The thickness of the polyamide substrate reverse osmosis membrane is 0.04 ~ 0.06mm, and aperture is 0.5 ~ 1nm.
9. a kind of preparation method of sewage disposal antipollution complex reverse osmosis membrane according to claim 1, it is characterised in that：
The thickness of the dissaving polymer film is 0.02 ~ 0.05mm.
10. a kind of sewage disposal antipollution that any one of claim 1~9 preparation method is prepared is compound reverse osmosis
Film.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111054215A (en) * | 2018-10-16 | 2020-04-24 | 天津天元新材料科技有限公司 | Method for enhancing pollution resistance of composite reverse osmosis membrane |
| CN114315024A (en) * | 2021-12-25 | 2022-04-12 | 广东台泉环保科技有限公司 | Emergency treatment process for garbage penetrating fluid |
| CN114405157A (en) * | 2021-12-27 | 2022-04-29 | 重庆再升科技股份有限公司 | High-strength fluid separation medium |
| CN117547974A (en) * | 2024-01-12 | 2024-02-13 | 河南师范大学 | Polyaiperazine amide nanofiltration membrane with high acid-base stability and preparation method thereof |
-
2018
- 2018-03-09 CN CN201810192738.0A patent/CN108246129A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111054215A (en) * | 2018-10-16 | 2020-04-24 | 天津天元新材料科技有限公司 | Method for enhancing pollution resistance of composite reverse osmosis membrane |
| CN114315024A (en) * | 2021-12-25 | 2022-04-12 | 广东台泉环保科技有限公司 | Emergency treatment process for garbage penetrating fluid |
| CN114405157A (en) * | 2021-12-27 | 2022-04-29 | 重庆再升科技股份有限公司 | High-strength fluid separation medium |
| CN117547974A (en) * | 2024-01-12 | 2024-02-13 | 河南师范大学 | Polyaiperazine amide nanofiltration membrane with high acid-base stability and preparation method thereof |
| CN117547974B (en) * | 2024-01-12 | 2024-04-12 | 河南师范大学 | Polyaiperazine amide nanofiltration membrane with high acid-base stability and preparation method thereof |
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