CN107899440A - A kind of preparation method and application of ultra-low-pressure reverse osmosis film - Google Patents
A kind of preparation method and application of ultra-low-pressure reverse osmosis film Download PDFInfo
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- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- WZCQRUWWHSTZEM-UHFFFAOYSA-N 1,3-phenylenediamine Chemical compound NC1=CC=CC(N)=C1 WZCQRUWWHSTZEM-UHFFFAOYSA-N 0.000 claims abstract description 58
- 229940018564 m-phenylenediamine Drugs 0.000 claims abstract description 58
- 239000007864 aqueous solution Substances 0.000 claims abstract description 31
- IJOOHPMOJXWVHK-UHFFFAOYSA-N chlorotrimethylsilane Chemical compound C[Si](C)(C)Cl IJOOHPMOJXWVHK-UHFFFAOYSA-N 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 210000002469 basement membrane Anatomy 0.000 claims description 19
- 239000000178 monomer Substances 0.000 claims description 13
- 150000002220 fluorenes Chemical class 0.000 claims description 11
- 150000002469 indenes Chemical class 0.000 claims description 11
- 239000000243 solution Substances 0.000 claims description 9
- 150000001412 amines Chemical class 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 3
- 238000000643 oven drying Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 125000000524 functional group Chemical group 0.000 claims description 2
- 241000123859 Cyclea racemosa Species 0.000 claims 1
- 238000012696 Interfacial polycondensation Methods 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 claims 1
- 239000012528 membrane Substances 0.000 abstract description 19
- 239000003960 organic solvent Substances 0.000 abstract description 16
- 230000004907 flux Effects 0.000 abstract description 8
- 150000003839 salts Chemical class 0.000 abstract description 6
- 239000002131 composite material Substances 0.000 abstract description 3
- 229920002492 poly(sulfone) Polymers 0.000 abstract description 3
- 238000006068 polycondensation reaction Methods 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- 238000002955 isolation Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 33
- 238000002474 experimental method Methods 0.000 description 25
- 230000000052 comparative effect Effects 0.000 description 18
- 238000000034 method Methods 0.000 description 11
- 125000004203 4-hydroxyphenyl group Chemical group [H]OC1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 6
- ANOXEUSGZWSCQL-LOYHVIPDSA-N Cycleanine Chemical compound C([C@H]1N(C)CCC=2C=C(C(=C(OC3=CC=C(C=C3)C[C@H]3N(C)CCC=4C=C(OC)C(OC)=C(C3=4)O3)C=21)OC)OC)C1=CC=C3C=C1 ANOXEUSGZWSCQL-LOYHVIPDSA-N 0.000 description 6
- PEVPVMCJEMVCAS-UHFFFAOYSA-N Cycleanine Natural products COc1cc2CCN(C)C3Cc4ccc(Oc5cccc6CCN(C)C(Cc7ccc(Oc(c1OC)c23)cc7)c56)cc4 PEVPVMCJEMVCAS-UHFFFAOYSA-N 0.000 description 6
- ANOXEUSGZWSCQL-UHFFFAOYSA-N O-Methyl-isochondodendrin Natural products O1C(C2=3)=C(OC)C(OC)=CC=3CCN(C)C2CC(C=C2)=CC=C2OC(C=23)=C(OC)C(OC)=CC=2CCN(C)C3CC2=CC=C1C=C2 ANOXEUSGZWSCQL-UHFFFAOYSA-N 0.000 description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- -1 amine salt Chemical class 0.000 description 4
- 210000004379 membrane Anatomy 0.000 description 4
- 239000010410 layer Substances 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000010612 desalination reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- 239000002798 polar solvent Substances 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 101100207005 Caenorhabditis elegans tmc-2 gene Proteins 0.000 description 1
- 238000012695 Interfacial polymerization Methods 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000002346 layers by function Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 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
- B01D67/0006—Organic membrane manufacture by chemical reactions
-
- 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
- B01D69/10—Supported membranes; Membrane supports
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (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 present invention relates to a kind of ultra-low-pressure reverse osmosis membrane preparation method and application, belong to technical field of membrane separation.The present invention is to be coated with a layer function composite bed on porosity polysulfone supporting layer surface, feature composite bed is by the m-phenylene diamine (MPD) aqueous solution containing polyfunctional group rigid unitary, is formed with the pyromellitic trimethylsilyl chloride being dissolved in organic solvent in the surface polycondensation of porosity polysulfone supporting layer.Wherein, by adding polyfunctional group rigid unitary in m-phenylene diamine (MPD) aqueous solution, the higher reverse osmosis membrane of intensity is prepared.The present invention is prepared simply, and salt rejection rate is high, water flux is big, and the application of isolation technics can be achieved at normal temperatures and pressures.
Description
Technical field
The present invention relates to technical field of membrane separation, especially a kind of ultra-low-pressure reverse osmosis membrane preparation method and application.
Background technology
Reverse osmosis is current most advanced, most energy saving to efficiently separate one of technology.Reverse osmosis membrane passes through in trap water
The salts substances such as NaCl achieve the purpose that sea water desalination, bitter desalination and the purifying of domestic drinking water.Since John in 1979
Since Cadotte has the RO films that equipment with high desalinization is made in revolutionary invention (United States Patent (USP) 4277344), based on reverse osmosis membrane
The development that industrial rolled film (spiral wound element) industry is advanced by leaps and bounds.
At present, the main path for improving RO film properties is to change the reactant composition of interfacial polymerization, is substantially had following several
Method, technique：
1) additive is added in amine aqueous phase solution：Such as the United States Patent (USP) of Nitto Denko Hydranautics
5254261,6171497 describe addition amine salt and isopropanol；The United States Patent (USP) 6015495 of Saehan, 6245234 and
6368507 describe addition polar solvent or amine salt and polar solvent.
2) additive is added to TMC is organic：United States Patent (USP) 6337018 such as Dow Chemical disclose with TMC
2:1 amount adds phosphate；The United States Patent (USP) 6521130 of Toray, which discloses addition 3%, has total carbon atom number more than 8
Organic carbonate esters material.
3) post-processing approach：Dow adds amine when disclosing post processing in US Patents 5658460,5755964
Or amine salt sweller improves the flux of final RO films.CN1213985A coats PVA on the surface of reverse osmosis membrane, has electricity
Neutrality, can inhibit the Electrostatic Absorption of the fouling membrane material with electric charge in water, so as to improve the resistance tocrocking of polyamide composite film.
Above-mentioned improved RO films improve the various performances of diaphragm to varying degrees, and extend these products applies model
Enclose, but this area stills need membrane for water treatment of the exploitation with more dominance energy.
The content of the invention
In order to solve the above technical problems existing in the prior art, the present invention provides a kind of ultra-low-pressure reverse osmosis film preparation
Method, to improve polyamide-based complex reverse osmosis membrane functional layer intensity, strengthens its elasticity modulus, makes in reverse osmosis membrane coiling process
More pressure-resistant, service life is lifted.
The technical solution adopted by the present invention is specially：
A kind of ultra-low-pressure reverse osmosis membrane preparation method, it is characterised in that：Include the following steps：
1) m-phenylene diamine (MPD) (mPDA) aqueous solution is prepared；
2) pyromellitic trimethylsilyl chloride (TMC) organic solution is prepared；
3) the porous basement membrane using PET adhesive-bonded fabrics as supporting layer is immersed in above-mentioned m-phenylene diamine (MPD) aqueous solution；
4) basement membrane for submerging m-phenylene diamine (MPD) aqueous solution is contacted with above-mentioned pyromellitic trimethylsilyl chloride organic solution, carries out interface
Polycondensation reaction.
5) it is heat-treated, 60 DEG C of oven drying 3min.
6) pure water cleaning 10min.
The content range of mPDA is 0.10-10.0% in the mPDA aqueous solutions of the step 1), and preferably content range is
1.0-9.0%, the content range being more highly preferred to are 3.0-7.0%.
Polyfunctional group rigid unitary, the polyfunctional group rigid unitary bag are added in step 1) the m-phenylene diamine (MPD) aqueous solution
Include polyfunctional group rigidity amine monomers, polyfunctional group rigidity fluorenes monomer, polyfunctional group rigidity indenes monomer.Polyfunctional group rigid unitary contains
Amount scope is 0.01-10%.
One kind of the monomer of following species can be selected in more preferably scheme, the polyfunctional group rigid unitary：Polyfunctional group is firm
Property amine monomers, polyfunctional group rigidity fluorenes monomer or polyfunctional group rigidity indenes monomer；It is preferred that cycleanine, 9,9- are double (4- hydroxyphenyls)
Fluorenes or 5,5 ' -6,6 '-tetrahydroxy -3,3,3 ', the spiral double indenes of 3 '-tetramethyl.
In the pyromellitic trimethylsilyl chloride organic solution of the step 2) content range of pyromellitic trimethylsilyl chloride for 0.05~
1.0%, preferred content scope is 0.1~0.2%, and the content range being more highly preferred to is 0.14~0.18%.
Method of the present invention carries out under normal temperature and pressure (25 DEG C, an atmospheric pressure).
Beneficial effects of the present invention：
1st, by the addition polyfunctional group rigid unitary in m-phenylene diamine (MPD) aqueous solution, ultra-low-pressure reverse osmosis film is prepared, its
With higher elasticity modulus.
2nd, reverse osmosis membrane of the present invention effectively improves compound membrane flux and salt rejection rate.
Embodiment
Limited with reference to specific embodiment technical scheme is further, but claimed
Scope is not only limited to made description.
For convenience, in the statement of following embodiments and comparative example, water flux unit GFD is gallon/square English
Ruler/day.In all examples, reverse osmosis membrane test condition is：NaCl brine strengths are 1500ppm, pressure 150psi, temperature
Spend for 25 DEG C.This is the test condition of bitter general in industry.
Embodiment 1
0.01% cycleanine is added in 0.1% m-phenylene diamine (MPD) aqueous solution, under conditions of 0.05%TMC organic solvents
The performance of obtained ultra-low-pressure reverse osmosis film.In this group of embodiment, selected open support basement membrane, experimental procedure and side
Method, test condition are identical with described in comparative example.
Test result is shown in Table 1.
Embodiment 2
0.1% cycleanine is added in 0.5% m-phenylene diamine (MPD) aqueous solution, the institute under conditions of 0.1%TMC organic solvents
The performance of obtained high intensity reverse osmosis membrane.In this group of embodiment, selected open support basement membrane, experimental procedure and method,
Test condition is identical with described in comparative example.
Test result is shown in Table 1.
Embodiment 3
0.5% cycleanine is added in 1% m-phenylene diamine (MPD) aqueous solution, it is made under conditions of 0.2%TMC organic solvents
The performance of the ultra-low-pressure reverse osmosis film obtained.In this group of embodiment, selected open support basement membrane, experimental procedure and method, are surveyed
Strip part is identical with described in comparative example.
Test result is shown in Table 1.
Embodiment 4
1% cycleanine is added in 5% m-phenylene diamine (MPD) aqueous solution, it is obtained under conditions of 0.5%TMC organic solvents
Ultra-low-pressure reverse osmosis film performance.In this group of embodiment, selected open support basement membrane, experimental procedure and method, test
Condition is identical with described in comparative example.
Test result is shown in Table 1.
Embodiment 5
5% cycleanine is added in 10% m-phenylene diamine (MPD) aqueous solution, it is obtained under conditions of 1%TMC organic solvents
Ultra-low-pressure reverse osmosis film performance.In this group of embodiment, selected open support basement membrane, experimental procedure and method, test
Condition is identical with described in comparative example.
Test result is shown in Table 1.
Embodiment 6
Double (4- hydroxyphenyls) fluorenes of 0.01%9,9- are added in 0.1% m-phenylene diamine (MPD) aqueous solution, it is organic molten in 0.05%TMC
The performance of obtained ultra-low-pressure reverse osmosis film under conditions of agent.In this group of embodiment, selected open support basement membrane, experiment
Step and method, test condition are identical with described in comparative example.
Test result is shown in Table 1.
Embodiment 7
Double (4- hydroxyphenyls) fluorenes of 0.1%9,9- are added in 0.5% m-phenylene diamine (MPD) aqueous solution, in 0.1%TMC organic solvents
Under conditions of obtained ultra-low-pressure reverse osmosis film performance.In this group of embodiment, selected open support basement membrane, experiment step
Suddenly and method, test condition are identical with described in comparative example.
Test result is shown in Table 1.
Embodiment 8
Double (4- hydroxyphenyls) fluorenes of 1%9,9- are added in 1% m-phenylene diamine (MPD) aqueous solution, in the bar of 0.2%TMC organic solvents
The performance of obtained ultra-low-pressure reverse osmosis film under part.In this group of embodiment, selected open support basement membrane, experimental procedure with
Method, test condition are identical with described in comparative example.
Test result is shown in Table 1.
Embodiment 9
Double (4- hydroxyphenyls) fluorenes of 3%9,9- are added in 5% m-phenylene diamine (MPD) aqueous solution, in the bar of 0.5%TMC organic solvents
The performance of obtained ultra-low-pressure reverse osmosis film under part.In this group of embodiment, selected open support basement membrane, experimental procedure with
Method, test condition are identical with described in comparative example.
Test result is shown in Table 1.
Embodiment 10
Double (4- hydroxyphenyls) fluorenes of 5%9,9- are added in 10% m-phenylene diamine (MPD) aqueous solution, in the bar of 1%TMC organic solvents
The performance of obtained ultra-low-pressure reverse osmosis film under part.In this group of embodiment, selected open support basement membrane, experimental procedure with
Method, test condition are identical with described in comparative example.
Test result is shown in Table 1.
Embodiment 11
0.01%5,5 ' -6,6 '-tetrahydroxy -3,3,3 ', 3 '-tetramethyl spiral shell are added in 0.1% m-phenylene diamine (MPD) aqueous solution
The double indenes of rotation, the performance of obtained ultra-low-pressure reverse osmosis film under conditions of 0.05%TMC organic solvents.In this group of embodiment,
Selected open support basement membrane, experimental procedure and method, test condition are identical with described in comparative example.
Test result is shown in Table 1.
Embodiment 12
0.2%5,5 ' -6,6 '-tetrahydroxy -3,3,3 ' is added in 0.5% m-phenylene diamine (MPD) aqueous solution, 3 '-tetramethyl is spiral
Double indenes, the performance of obtained ultra-low-pressure reverse osmosis film under conditions of 0.1%TMC organic solvents.It is selected in this group of embodiment
Open support basement membrane, experimental procedure and method, test condition are identical with described in comparative example.
Test result is shown in Table 1.
Embodiment 13
0.8%5,5 ' -6,6 '-tetrahydroxy -3,3,3 ' is added in 1% m-phenylene diamine (MPD) aqueous solution, 3 '-tetramethyl is spiral double
Indenes, the performance of obtained ultra-low-pressure reverse osmosis film under conditions of 0.2%TMC organic solvents.It is selected in this group of embodiment
Open support basement membrane, experimental procedure and method, test condition are identical with described in comparative example.
Test result is shown in Table 1.
Embodiment 14
1%5,5 ' -6,6 '-tetrahydroxy -3,3,3 ' is added in 5% m-phenylene diamine (MPD) aqueous solution, 3 '-tetramethyl is spiral double
Indenes, the performance of obtained ultra-low-pressure reverse osmosis film under conditions of 0.5%TMC organic solvents.It is selected in this group of embodiment
Open support basement membrane, experimental procedure and method, test condition are identical with described in comparative example.
Test result is shown in Table 1.
Embodiment 15
5%5,5 ' -6,6 '-tetrahydroxy -3,3,3 ' is added in 10% m-phenylene diamine (MPD) aqueous solution, 3 '-tetramethyl is spiral double
Indenes, the performance of obtained ultra-low-pressure reverse osmosis film under conditions of 1%TMC organic solvents.It is selected in this group of embodiment
Open support basement membrane, experimental procedure and method, test condition are identical with described in comparative example.
Test result is shown in Table 1.
Comparative example：
It is water-soluble that polysulphone super-filter membrane using PET adhesive-bonded fabrics as supporting layer is completely infused in the mPDA containing 5.0%mPDA
In liquid, after submerging 30s, the aqueous solution of excess surface is removed.10-20s in the n-hexane organic solution of 0.5%TMC is impregnated in again,
After removing unnecessary remained on surface liquid, diaphragm is first placed in 60 DEG C of oven dryings 3 minutes.It is put into pure water and cleans 10min.Thus
Reverse osmosis membrane its water flux prepared by method is 11.41GFD, salt rejection rate 99.29%, elasticity modulus 3.43GPa.
1 ultra-low-pressure reverse osmosis film properties test table of table
A small amount of polyfunctional group rigid unitary is added in m-phenylene diamine (MPD) aqueous solution by experiment, enters back into TMC organic solvents
In, ultra-low-pressure reverse osmosis film is made.From table 1 to ultra-low-pressure reverse osmosis film properties test data, in m-phenylene diamine (MPD) aqueous solution
Polyfunctional group rigid unitary is added, is compared compared with comparative example, salt rejection rate, water flux and elasticity modulus are into significant difference, and with more
The increase of functional group's rigid unitary addition, salt rejection rate increase and water flux increase, elasticity modulus performance also accordingly strengthen.Thus
Understand, ultra-low-pressure reverse osmosis film prepared by the present invention significantly improves diaphragm flux desalting performance, while adds aramid layer
Intensity.
The above, is presently preferred embodiments of the present invention, not the present invention is imposed any restrictions, those skilled in the art's profit
A little simple modification, equivalent variations or modification are made with the content of the disclosure above, is all fallen within protection scope of the present invention.
Claims (8)
1. a kind of preparation method of ultra-low-pressure reverse osmosis film, it is characterised in that include the following steps：
1) m-phenylene diamine (MPD) (mPDA) aqueous solution containing polyfunctional group rigid unitary is prepared；
2) pyromellitic trimethylsilyl chloride (TMC) organic solution is prepared；
3) the porous basement membrane using PET adhesive-bonded fabrics as supporting layer is immersed in above-mentioned m-phenylene diamine (MPD) aqueous solution；
4) basement membrane for submerging m-phenylene diamine (MPD) aqueous solution is contacted with above-mentioned pyromellitic trimethylsilyl chloride organic solution, carries out interfacial polycondensation
Reaction；
5) it is heat-treated, 60 DEG C of oven drying 3min；
6) pure water cleaning 10min.
2. preparation method as claimed in claim 1, it is characterised in that mPDA matter in the m-phenylene diamine (MPD) aqueous solution of the step 1)
It is 0.1~10.0% to measure content range, and preferably content range is 1.0~9.0%, the content range being more highly preferred to for 3.0~
7.0%.
3. preparation method as claimed in claim 1, it is characterised in that in the pyromellitic trimethylsilyl chloride organic solution described in step 2)
TMC content ranges are 0.05~1.0%, and preferred content scope is 0.1~0.2%, the content range being more highly preferred to for 0.14~
0.18%.
4. preparation method as claimed in claim 1, it is characterised in that added in step 1) the m-phenylene diamine (MPD) aqueous solution more
Functional group's rigid unitary, the polyfunctional group rigid unitary include polyfunctional group rigidity amine monomers, polyfunctional group rigidity fluorenes monomer,
Polyfunctional group rigidity indenes monomer.
5. preparation method as claimed in claim 4, it is characterised in that the content range of the polyfunctional group rigid unitary is
0.01~5%.
6. preparation method as claimed in claim 4, it is characterised in that the polyfunctional group rigidity amine monomers can be Cyclea racemosa Oliv
Rather.
7. preparation method as claimed in claim 4, it is characterised in that the polyfunctional group rigidity fluorenes monomer is the double (4- of 9,9-
Hydroxyphenyl) fluorenes.
8. preparation method as claimed in claim 4, it is characterised in that the polyfunctional group rigidity indenes monomer is 5,5 ' -6,
6 '-tetrahydroxy -3,3,3 ', the spiral double indenes of 3 '-tetramethyl.
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| CN111712317A (en) * | 2018-05-10 | 2020-09-25 | 株式会社Lg化学 | Reverse osmosis membrane, method for producing same, and water treatment module |
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| CN103111191A (en) * | 2013-03-02 | 2013-05-22 | 汕头市奥斯博环保材料制造有限公司 | Preparation method of high-flux composite polyamide reverse osmosis membrane |
| CN103736404A (en) * | 2014-01-06 | 2014-04-23 | 北京碧水源膜科技有限公司 | Basal membrane of reverse osmosis membrane and preparation method of reverse osmosis membrane |
| CN104387336A (en) * | 2014-10-24 | 2015-03-04 | 上海应用技术学院 | Preparation methods of 1,4,7,10-tetraazacyclododecane and nanofiltration membrane |
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| CN111712317B (en) * | 2018-05-10 | 2022-10-11 | 株式会社Lg化学 | Reverse osmosis membrane, method for producing same, and water treatment module |
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