CN104587840A - Preparation method of high-throughput nanofiltration membrane - Google Patents
Preparation method of high-throughput nanofiltration membrane Download PDFInfo
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- CN104587840A CN104587840A CN201410713485.9A CN201410713485A CN104587840A CN 104587840 A CN104587840 A CN 104587840A CN 201410713485 A CN201410713485 A CN 201410713485A CN 104587840 A CN104587840 A CN 104587840A
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- 239000012528 membrane Substances 0.000 title claims abstract description 63
- 238000002360 preparation method Methods 0.000 title claims abstract description 29
- 238000001728 nano-filtration Methods 0.000 title claims abstract description 19
- 239000008346 aqueous phase Substances 0.000 claims abstract description 30
- 239000012071 phase Substances 0.000 claims abstract description 14
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 8
- 229920002492 poly(sulfone) Polymers 0.000 claims abstract description 7
- 239000004033 plastic Substances 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 229920000570 polyether Polymers 0.000 claims description 14
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 14
- 229920000642 polymer Polymers 0.000 claims description 13
- GLUUGHFHXGJENI-UHFFFAOYSA-N Piperazine Chemical compound C1CNCCN1 GLUUGHFHXGJENI-UHFFFAOYSA-N 0.000 claims description 12
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 12
- WTFAGPBUAGFMQX-UHFFFAOYSA-N 1-[2-[2-(2-aminopropoxy)propoxy]propoxy]propan-2-amine Chemical class CC(N)COCC(C)OCC(C)OCC(C)N WTFAGPBUAGFMQX-UHFFFAOYSA-N 0.000 claims description 11
- 150000001263 acyl chlorides Chemical class 0.000 claims description 8
- -1 amino compound Chemical class 0.000 claims description 7
- DIOQZVSQGTUSAI-UHFFFAOYSA-N decane Chemical compound CCCCCCCCCC DIOQZVSQGTUSAI-UHFFFAOYSA-N 0.000 claims description 6
- 150000001412 amines Chemical class 0.000 claims description 4
- 229920002521 macromolecule Polymers 0.000 claims description 4
- RCEAADKTGXTDOA-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCCCCCC[Na] Chemical compound OS(O)(=O)=O.CCCCCCCCCCCC[Na] RCEAADKTGXTDOA-UHFFFAOYSA-N 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 150000004985 diamines Chemical class 0.000 claims description 2
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 2
- 238000010612 desalination reaction Methods 0.000 abstract description 4
- 238000007605 air drying Methods 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 229910001220 stainless steel Inorganic materials 0.000 abstract 1
- 239000010935 stainless steel Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 26
- 230000004907 flux Effects 0.000 description 13
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 9
- 150000003839 salts Chemical class 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000003373 anti-fouling effect Effects 0.000 description 3
- 229950005953 camsilate Drugs 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000011017 operating method Methods 0.000 description 3
- 230000009257 reactivity Effects 0.000 description 3
- 239000009261 D 400 Substances 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 125000003368 amide group Chemical group 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003204 osmotic effect Effects 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 230000010148 water-pollination Effects 0.000 description 2
- 238000012695 Interfacial polymerization Methods 0.000 description 1
- 238000011938 amidation process Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- IJOOHPMOJXWVHK-UHFFFAOYSA-N chlorotrimethylsilane Chemical compound C[Si](C)(C)Cl IJOOHPMOJXWVHK-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides a preparation method of a high-throughput nanofiltration membrane, wherein the preparation method comprises the following steps: fixing a polysulfone ultrafiltration membrane piece on a stainless steel or plastic board, pouring an aqueous-phase solution to the ultrafiltration membrane piece surface, placing for 30-90 s, then pouring away the aqueous-phase solution, air-drying an aqueous phase on the membrane surface; then pouring an oil-phase solution into the membrane surface, making the membrane piece surface immersed in the oil-phase solution, placing for 10-30 s, then pouring away an oil phase, after pouring away, immediately placing the membrane piece in an air box of an air blower, drying for 3-10 min, and then taking out to obtain the nanofiltration membrane. Under a condition of sacrificing the desalination rate, the nanofiltration membrane can have the throughput increased by about 50-100% on the basis of original throughput, and has the throughput increased significantly.
Description
Technical field
The present invention relates to antipollution Nanofiltration-membrane technique field, be specifically related to a kind of preparation method of high-flux nanofiltration membrane.
Background technology
Compare to milipore filter and reverse osmosis membrane, NF membrane is because it is compared with having the advantage of high water flux and high rejection under low operating pressure in water treatment, and the fields such as medicine, food and biology are widely used.
The preparation technology of current NF membrane has and comprises phase inversion, weak solution coating, interfacial polymerization, thermal induction phase inversion and chemic modified method, the preparation technology of current NF membrane takes into account salt rejection rate often and other performances such as factor such as flux, resistance tocrocking is determined, but, especially for the present situation of the current sewage disposal of China, under certain applied environment, for salt rejection rate less demanding of NF membrane, but there is very high requirement for resistance tocrocking, for above-mentioned intrinsic technical problem, the present invention is proposed.
Summary of the invention
In view of this, the invention provides a kind of preparation method of high-flux nanofiltration membrane, being intended to the water flux and the antifouling property that increase NF membrane by sacrificing salt rejection rate to a certain extent.
The technical solution used in the present invention is specially:
A preparation method for high-flux nanofiltration membrane, comprises following steps:
Polysulfones ultrafiltration membranes is immersed in 12-24h in the solution of the lauryl sodium sulfate of 0.05-2.5wt%, pure water cleaning subsequently;
After the piperazine of configuration 0.2-1.2wt% and the aqueous phase solution containing amino compound of 0.2-1.2wt% stir, the pH value of aqueous phase solution is adjusted to 9-11;
The n-decane solution of the polyfunctional group acyl chlorides of preparation 0.08-0.15wt%;
Polysulphone super-filter membrane sheet is fixed on corrosion resistant plate or plastic plate, pours the aqueous phase solution of 50-100ml into ultrafiltration membrane surface, make aqueous phase solution submergence membrane surface 1-2mm, place after 30-90s, aqueous phase solution is outwelled and dries the aqueous phase on film surface; Pour the oil-phase solution of 50-100ml into film surface again, make aqueous phase solution submergence membrane surface 1-2mm, oil phase is outwelled, after immediately diaphragm being placed in the 70-90 DEG C of dry 3-10min of air blast bellows after outwelling after placing 10-30s, take out i.e. obtained NF membrane, the dry film of preparation is steeped in pure water.
In the preparation method of above-mentioned high-flux nanofiltration membrane, described is diamine containing fragrant phenyl ring or aliphatic amine containing amino compound.
In the preparation method of above-mentioned high-flux nanofiltration membrane, described is micromolecular compound containing binary amino or high molecular polymer containing amino compound.
In the preparation method of above-mentioned high-flux nanofiltration membrane, described is the high molecular polymer containing two amino or polyamino containing amino compound.
In the preparation method of above-mentioned high-flux nanofiltration membrane, described is polyether monoamine high molecular polymer containing two high molecular polymer that is amino or polyamino.
In the preparation method of above-mentioned high-flux nanofiltration membrane, described polyether monoamine high molecular polymer is the JEFFAMINE series polyether amine of Huntsman company or other main chain has ehter bond, end group has amino macromolecular compound.
The beneficial effect that the present invention produces is:
By adding modifier in interface polymerization reaction aqueous phase solution, significantly improve the permeable amount of NF membrane.And the introducing of hydrophilic radical also improves the antifouling property of film; Realizing the production of different flux and desalination NF membrane product by controlling competition monomer, the reactivity of polymer, molecular chain structure and size, having widened kind and the application of NF membrane.
After carrying out interface polymerization reaction with the aqueous phase solution and acyl chloride oil phase that comprise polynary amine and polyetheramine, generate and there is high hydrophilic, antipollution, polyamide desalination layer containing the soft segment of polyethers.
Must take into full account that salt rejection rate is to a certain degree different from traditional NF membrane preparation technology, preparation method of the present invention, for specific water quality, to sacrifice salt rejection rate to a certain extent for cost, significantly increases water flux, improves the antifouling property of NF membrane.Compared with current NF membrane preparation technology, advantage of the present invention is mainly reflected in:
One is the polyether monoamine polymer of aqueous phase interpolation containing amino and the acyl chloride reaction of oil phase, after the anti-raw competitive reaction of the amino of additive and polyamine and acyl chlorides, the structure of polyethers is introduced in NF membrane desalination layer surface texture, therefore the hydrophily of film strengthens, show and flux significantly improves more before modified, about 50-100% can be promoted on the basis of evc flux;
Two is by the amino in additive molecule and residual active acyl chloride group generation amidation process, thus terminate the reactivity of acyl chlorides, greatly reduce the ratio of hydrolysis, the bear electric group that polyamide structure surface is contained significantly reduces, and the charge on NF membrane surface obviously reduces.
Detailed description of the invention
Below in conjunction with embodiment, technical scheme of the present invention is described in further detail.When considering in conjunction with the embodiments, more completely the present invention can be understood better.Embodiment described herein and explanation thereof, for explaining the present invention, do not form inappropriate limitation of the present invention.
Embodiment 1:
Polysulfones ultrafiltration membranes is immersed in 24h in the solution of the lauryl sodium sulfate of 0.1wt%, pure water cleaning subsequently; After the configuration piperazine of 0.2wt% and the aqueous phase solution of the JEFFAMINE ED2003 of 0.2wt% stir, with NaOH, the pH value of aqueous phase solution is adjusted to 11; Prepare the n-decane solution (oil-phase solution) of the polyfunctional group acyl chlorides of 0.08wt% again; The polysulphone super-filter membrane sheet (molecular cut off about 80000) of about A4 paper size is fixed on corrosion resistant plate, pour the aqueous phase solution of 50ml into ultrafiltration membrane surface, make the thickness that aqueous phase solution submergence membrane surface is certain, place after 30s, aqueous phase solution is outwelled and dries the aqueous phase on film surface; Pour the oil-phase solution of 50ml into film surface again, make the thickness that aqueous phase solution submergence membrane surface is certain, place after 10s and oil phase is outwelled, outwell after diaphragm is placed in 88 DEG C of dry 3min of air blast bellows by rear horse back, take out i.e. obtained NF membrane, the film bubble of preparation is entered in pure water to be measured.Preparation principle is summarised as simply:
Preferred as one, mainly have employed polyether monoamine macromolecule containing amino high molecular polymer, comprise but be not limited only to the JEFFAMINE D-230 of Huntsman company, JEFFAMINE D-400, JEFFAMINE ED-2003 and JEFFAMINE T-5000.
Above-mentioned JEFFAMINE series polyether amine or other main chain have ehter bond, end group has amino macromolecular compound, therefore can be used as concrete synthesis material and carry out example.Polyetheramine is a class main chain is polyether structure, and end active functional group is the polymer of amido.Amido has good chemical reactivity, can with pyromellitic trimethylsilyl chloride generation condensation reaction, polyether structure has good hydrophily; By regulating and controlling the length of polyether segment, effectively can change the compactness extent of formed three-dimensional crosslinking structure, thus realize the effective control to water flux and salt rejection rate.
Embodiment 2:
The aqueous phase solution of the triethylamine camsilate (NMF) of the configuration piperazine of 0.15wt%, JEFFAMINE D-400 and 3wt% of 0.2wt%, other operating procedures are with embodiment 1.
Embodiment 3:
The aqueous phase solution of the triethylamine camsilate of the configuration piperazine of 0.12wt%, JEFFAMINE M2070 and 0.3wt% of 0.2wt%, other operating procedures are with embodiment 1.
Embodiment 4:
The aqueous phase solution of the triethylamine camsilate of the configuration piperazine of 0.2wt%, JEFFAMINE T-5000 and 0.3wt% of 2wt%, other operating procedures are with embodiment 1.
The separating property of NF membrane
With the MgSO of 2000mg/L
4the aqueous solution for for feed liquid, NF membrane is adopted to evaluate the osmotic water flux of instrument mensuration Nano filtering composite membrane, related concentrations is released by the electrical conductivity of the electrical conductivity and diffusate that measure feeding liquid, then rejection is calculated according to formula (1), the osmotic water flux of film is calculated according to formula (2), wherein:
(C
f-feeding liquid concentration, C
p-diffusate concentration)
(volume of V-infiltration water, the effective area of A-film, t-time)
Be 22.89cm at film effective area
2, test pressure is 70psi, temperature is 25 DEG C, pH is 7-8, the rate of recovery is under the test condition of 15%, the NF membrane obtained to embodiment 1-4 is tested, its flux and to MgSO
4salt rejection rate numerical value as shown in table 1:
The flux of the NF membrane that table 1 embodiment 1-4 obtains and salt rejection rate
| Flux/LMH | MgSO 4/％ | |
| Example 1 | 120 | 87.5 |
| Example 2 | 89 | 97.3 |
| Example 3 | 145 | 78 |
| Example 4 | 230 | 45.3 |
As mentioned above, embodiments of the invention are explained, obviously, as long as do not depart from fact inventive point of the present invention and effect, will be readily apparent to persons skilled in the art distortion, is also all included within protection scope of the present invention.
Claims (6)
1. a preparation method for high-flux nanofiltration membrane, is characterized in that, comprises following steps:
Polysulfones ultrafiltration membranes is immersed in 12-24h in the solution of the lauryl sodium sulfate of 0.05-2.5wt%, pure water cleaning subsequently;
After the piperazine of configuration 0.2-1.2wt% and the aqueous phase solution containing amino compound of 0.2-1.2wt% stir, the pH value of aqueous phase solution is adjusted to 9-11;
The n-decane solution of the polyfunctional group acyl chlorides of preparation 0.08-0.15wt%;
Polysulphone super-filter membrane sheet is fixed on corrosion resistant plate or plastic plate, pours the aqueous phase solution of 50-100ml into ultrafiltration membrane surface, make aqueous phase solution submergence membrane surface 1-2mm, place after 30-90s, aqueous phase solution is outwelled and dries the aqueous phase on film surface; Pour the oil-phase solution of 50-100ml into film surface again, make aqueous phase solution submergence membrane surface 1-2mm, oil phase is outwelled, after immediately diaphragm being placed in the 70-90 DEG C of dry 3-10min of air blast bellows after outwelling after placing 10-30s, take out i.e. obtained NF membrane, the dry film of preparation is steeped in pure water.
2. the preparation method of high-flux nanofiltration membrane according to claim 1, is characterized in that, described is diamine containing fragrant phenyl ring or aliphatic amine containing amino compound.
3. the preparation method of high-flux nanofiltration membrane according to claim 1, is characterized in that, described is the high molecular polymer containing two amino or polyamino containing amino compound.
4. the preparation method of high-flux nanofiltration membrane according to claim 3, is characterized in that, described is polyether monoamine high molecular polymer containing two high molecular polymer that is amino or polyamino.
5. the preparation method of high-flux nanofiltration membrane according to claim 4, it is characterized in that, described polyether monoamine high molecular polymer is the JEFFAMINE series polyether amine of Huntsman company or other main chain has ehter bond, end group has amino macromolecular compound.
6. the preparation method of high-flux nanofiltration membrane according to claim 1, is characterized in that, the described compound containing amino is the micromolecular compound containing binary amino.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107158981A (en) * | 2017-06-29 | 2017-09-15 | 中国石油大学(华东) | A kind of high-flux nanofiltration membrane and preparation method thereof |
| KR20190050496A (en) * | 2017-11-03 | 2019-05-13 | 주식회사 엘지화학 | Composition for interfacial polymerizing polyamide, method for manufacturing water-treatment membrane using the same and water-treatment membrane |
| CN109745878A (en) * | 2018-12-29 | 2019-05-14 | 北京碧水源膜科技有限公司 | Polypiperazine-amide/amphiphilic block macromolecular nanofiltration membrane preparation method |
| CN112755812A (en) * | 2020-12-18 | 2021-05-07 | 中化(宁波)润沃膜科技有限公司 | High-flux cross-linked composite nanofiltration membrane with intermediate layer and preparation method thereof |
| CN113019148A (en) * | 2021-04-08 | 2021-06-25 | 南阳师范学院 | Preparation method of positively charged composite nanofiltration membrane |
| CN113398784A (en) * | 2021-05-28 | 2021-09-17 | 北京碧水源分离膜科技有限公司 | Preparation method of novel nanofiltration membrane |
| US11247179B2 (en) | 2015-11-20 | 2022-02-15 | Applied Biomimetic A/S | Method of preparing membranes |
| CN114573171A (en) * | 2022-01-21 | 2022-06-03 | 广东台泉环保科技有限公司 | Salt lake lithium extraction intelligent energy-saving system equipment |
| JP7480449B2 (en) | 2020-11-27 | 2024-05-10 | 大成建設株式会社 | Gas Storage and Release Compounds |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020048803A (en) * | 2000-12-18 | 2002-06-24 | 조 정 래 | Process for preparing a Nano Filtration Membrane of excellent water permeability |
| CN101934201A (en) * | 2009-06-29 | 2011-01-05 | 北京时代沃顿科技有限公司 | High-selectivity composite nanofiltration membrane and preparation method thereof |
| US20110155660A1 (en) * | 2006-05-12 | 2011-06-30 | Mickols William E | Modified membrane |
| JP2013532054A (en) * | 2010-05-21 | 2013-08-15 | ブロゼル，エイドリアン | Self-assembled surfactant structure |
| CN104117296A (en) * | 2014-08-06 | 2014-10-29 | 哈尔滨工业大学 | Polyamide composite nanofiltration membrane with main chain containing ether oxygen structure, and preparation method thereof |
-
2014
- 2014-11-28 CN CN201410713485.9A patent/CN104587840A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020048803A (en) * | 2000-12-18 | 2002-06-24 | 조 정 래 | Process for preparing a Nano Filtration Membrane of excellent water permeability |
| US20110155660A1 (en) * | 2006-05-12 | 2011-06-30 | Mickols William E | Modified membrane |
| CN101934201A (en) * | 2009-06-29 | 2011-01-05 | 北京时代沃顿科技有限公司 | High-selectivity composite nanofiltration membrane and preparation method thereof |
| JP2013532054A (en) * | 2010-05-21 | 2013-08-15 | ブロゼル，エイドリアン | Self-assembled surfactant structure |
| CN104117296A (en) * | 2014-08-06 | 2014-10-29 | 哈尔滨工业大学 | Polyamide composite nanofiltration membrane with main chain containing ether oxygen structure, and preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| 康彦芳主编: "《化工分离技术》", 31 January 2014, article "化工分离技术" * |
| 彭跃莲: "《膜技术前沿及工程应用》", 31 March 2009, article "膜技术前沿及工程应用" * |
| 高从堦: "《海水淡化技术与工程手册》", 30 April 2004, article "反渗透与纳滤海水淡化技术与工程" * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11247179B2 (en) | 2015-11-20 | 2022-02-15 | Applied Biomimetic A/S | Method of preparing membranes |
| CN107158981A (en) * | 2017-06-29 | 2017-09-15 | 中国石油大学(华东) | A kind of high-flux nanofiltration membrane and preparation method thereof |
| KR20190050496A (en) * | 2017-11-03 | 2019-05-13 | 주식회사 엘지화학 | Composition for interfacial polymerizing polyamide, method for manufacturing water-treatment membrane using the same and water-treatment membrane |
| KR102150149B1 (en) * | 2017-11-03 | 2020-08-31 | 주식회사 엘지화학 | Composition for interfacial polymerizing polyamide, method for manufacturing water-treatment membrane using the same and water-treatment membrane |
| CN109745878A (en) * | 2018-12-29 | 2019-05-14 | 北京碧水源膜科技有限公司 | Polypiperazine-amide/amphiphilic block macromolecular nanofiltration membrane preparation method |
| CN109745878B (en) * | 2018-12-29 | 2021-07-27 | 北京碧水源膜科技有限公司 | Preparation method of polypiperazine amide/amphiphilic block polymer nanofiltration membrane |
| JP7480449B2 (en) | 2020-11-27 | 2024-05-10 | 大成建設株式会社 | Gas Storage and Release Compounds |
| CN112755812A (en) * | 2020-12-18 | 2021-05-07 | 中化(宁波)润沃膜科技有限公司 | High-flux cross-linked composite nanofiltration membrane with intermediate layer and preparation method thereof |
| CN113019148A (en) * | 2021-04-08 | 2021-06-25 | 南阳师范学院 | Preparation method of positively charged composite nanofiltration membrane |
| CN113398784A (en) * | 2021-05-28 | 2021-09-17 | 北京碧水源分离膜科技有限公司 | Preparation method of novel nanofiltration membrane |
| CN114573171A (en) * | 2022-01-21 | 2022-06-03 | 广东台泉环保科技有限公司 | Salt lake lithium extraction intelligent energy-saving system equipment |
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