CN114984779A - Preparation method of high-flux cellulose forward osmosis membrane - Google Patents
Preparation method of high-flux cellulose forward osmosis membrane Download PDFInfo
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- CN114984779A CN114984779A CN202210721144.0A CN202210721144A CN114984779A CN 114984779 A CN114984779 A CN 114984779A CN 202210721144 A CN202210721144 A CN 202210721144A CN 114984779 A CN114984779 A CN 114984779A
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- 229920002678 cellulose Polymers 0.000 title claims abstract description 112
- 239000001913 cellulose Substances 0.000 title claims abstract description 112
- 239000012528 membrane Substances 0.000 title claims abstract description 98
- 238000009292 forward osmosis Methods 0.000 title claims abstract description 54
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 108010059892 Cellulase Proteins 0.000 claims abstract description 42
- 229940106157 cellulase Drugs 0.000 claims abstract description 42
- 229920000875 Dissolving pulp Polymers 0.000 claims abstract description 11
- 239000011148 porous material Substances 0.000 claims abstract description 11
- 238000000614 phase inversion technique Methods 0.000 claims abstract description 7
- 238000005530 etching Methods 0.000 claims abstract description 4
- 239000011248 coating agent Substances 0.000 claims description 19
- 238000000576 coating method Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 15
- 238000005507 spraying Methods 0.000 claims description 5
- 238000004528 spin coating Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000013505 freshwater Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 22
- 238000000926 separation method Methods 0.000 abstract description 8
- 230000004907 flux Effects 0.000 abstract description 7
- 238000010612 desalination reaction Methods 0.000 abstract description 6
- 239000013535 sea water Substances 0.000 abstract description 4
- 239000002904 solvent Substances 0.000 abstract description 2
- 150000003839 salts Chemical class 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 14
- 238000005516 engineering process Methods 0.000 description 13
- 239000010408 film Substances 0.000 description 11
- LFTLOKWAGJYHHR-UHFFFAOYSA-N N-methylmorpholine N-oxide Chemical compound CN1(=O)CCOCC1 LFTLOKWAGJYHHR-UHFFFAOYSA-N 0.000 description 8
- 238000006116 polymerization reaction Methods 0.000 description 7
- IVNPXOUPZCTJAK-UHFFFAOYSA-N 4-methylmorpholin-4-ium;hydroxide Chemical compound O.CN1CCOCC1 IVNPXOUPZCTJAK-UHFFFAOYSA-N 0.000 description 6
- 230000008901 benefit Effects 0.000 description 6
- 238000005191 phase separation Methods 0.000 description 6
- -1 salt ions Chemical class 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 238000000108 ultra-filtration Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000012267 brine Substances 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 238000001223 reverse osmosis Methods 0.000 description 2
- 239000012266 salt solution Substances 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 150000001266 acyl halides Chemical class 0.000 description 1
- 230000003373 anti-fouling effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 238000010560 atom transfer radical polymerization reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000012621 metal-organic framework Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000002071 nanotube Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- GROMGGTZECPEKN-UHFFFAOYSA-N sodium metatitanate Chemical compound [Na+].[Na+].[O-][Ti](=O)O[Ti](=O)O[Ti]([O-])=O GROMGGTZECPEKN-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
Images
Classifications
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- 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
- B01D71/08—Polysaccharides
- B01D71/10—Cellulose; Modified cellulose
-
- 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
- B01D67/0009—Organic membrane manufacture by phase separation, sol-gel transition, evaporation or solvent quenching
- B01D67/0013—Casting processes
-
- 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
-
- 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
- C02F1/445—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by forward osmosis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/26—Spraying processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/02—Details relating to pores or porosity of the membranes
- B01D2325/022—Asymmetric membranes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Abstract
The invention discloses a preparation method of a high-flux cellulose forward osmosis membrane, and relates to the technical field of membrane separation and seawater desalination. The preparation method comprises the following steps: 1) dissolving cellulose in a solvent, and preparing a cellulose membrane by adopting a phase inversion method; 2) and carrying out single-side etching treatment on the cellulose membrane by using cellulase to obtain the cellulose forward osmosis membrane with an asymmetric structure. The cellulose forward osmosis membrane disclosed by the invention has an asymmetric pore structure, is excellent in water flux and salt rejection rate, is simple in preparation process, is environment-friendly, and can be produced in a large scale.
Description
Technical Field
The invention discloses a preparation method of a high-flux cellulose forward osmosis membrane, and relates to the technical field of membrane separation and seawater desalination.
Background
Currently, a severe shortage of clean water is challenging our survival and further development. Membrane-activated desalination strategies have been widely recognized as one of the effective methods for obtaining clean water due to their simple operation and high separation efficiency. Membrane-induced water separation techniques can be performed by external pressure differences or internal chemical potential differences, which form Reverse Osmosis (RO) and Forward Osmosis (FO) processes, respectively. Compared with the reverse osmosis process, the forward osmosis has the advantages of low energy requirement, strong anti-pollution capability and the like.
The membrane material is a key factor affecting the performance of the FO process. According to literature reports, current FO membranes typically have a bilayer structure (i.e., thin film composite, TFC) consisting of a porous support layer that provides strength and a dense active layer that achieves separation behavior. Such FO membranes are typically grown in situ with an aromatic polymer (as the active layer) on a polysulfone support layer material. Although the technology is mature, thin film composite membranes based on synthetic polymers still suffer from the disadvantages of low hydrophilicity, poor anti-fouling ability and difficulty in biodegradation. Therefore, some nanomaterials, such as sodium titanate nanotubes, carbon nanotubes, graphene oxide, and metal organic frameworks, etc., are introduced into the above FO membrane to enhance its hydrophilicity and desalination efficiency, however, this behavior increases the fabrication cost of the FO membrane and complicates the fabrication process.
Natural cellulose is used to construct separation membranes due to its excellent hydrophilicity, biocompatibility, and relatively low cost. Chinese patent CN106237875A discloses a preparation method of cellulose-based cation selective filtration membrane and its product. The method comprises the steps of dissolving or dispersing cellulose in a solvent by utilizing a homogeneous phase dissolving reagent or a heterogeneous phase reagent to prepare a porous cellulose film, then reacting an acyl halide reagent with the porous cellulose film to obtain a surface-modified cellulose-based macroinitiator, and then carrying out atom transfer radical polymerization on the prepared cellulose-based macroinitiator and a cationic monomer under the action of a catalyst and a ligand to obtain the cellulose-based cation selective filtration membrane. Chinese patent CN101007240A discloses a preparation method of a cellulose hollow fiber ultrafiltration membrane, which utilizes an immersion phase inversion method and a dry-wet method to obtain the cellulose hollow membrane, and the membrane is a finger-shaped hole supporting layer asymmetric structure and has good water treatment application prospect. Chinese patent CN103877867A discloses a method for preparing a cellulose ultrafiltration membrane, which is a cellulose ultrafiltration composite membrane consisting of a support layer and a nanopore cellulose skin layer is obtained under a low temperature condition. The above patents all use cellulose materials to prepare cellulose separation membranes, but the preparation processes are relatively complicated, the operability is poor, and the water flux of the membranes is low, so that there is a need to develop a simple method for preparing a high-flux cellulose separation membrane. In this study, we developed a low cost but ultra high water flux cellulose forward osmosis membrane from green cellulose material by a simple cellulase etching strategy. We coated cellulase on one surface of a cellulose film and allowed to react with cellulose. This behavior induces a unique asymmetric pore structure of the cellulose membrane, including the loose and dense layers. Wherein the porous loose layer supports high flux water transmission, and the compact structure is beneficial to trapping salt ions in the system.
Disclosure of Invention
The invention provides a preparation method of a high-flux cellulose forward osmosis membrane, aiming at the existing problems.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a preparation method of a high-flux cellulose forward osmosis membrane comprises the following steps:
1) dissolving the dissolving pulp in an aqueous solution of N-methylmorpholine-N-oxide (NMMO), and obtaining the cellulose membrane by a phase inversion method.
2) Coating a cellulose membrane with a cellulase solution on one side, and then placing the cellulose membrane into a constant-temperature incubator for treatment to obtain the cellulose forward osmosis membrane with the asymmetric pore structure.
Further, the cellulose content of the dissolving pulp in the step 1) is higher than 90%.
Further, the polymerization degree of the dissolving pulp in the step 1) is 400-600.
Further, the phase inversion method in the step 1) is used for forming the film in a blade coating mode.
Further, the cellulase in step 2) may be coated on the upper surface or the lower surface of the cellulose film.
Further, the dosage of the cellulase in the step 2) is 0.1-2 ml/m 2 。
Further, the cellulase in step 2) may be applied by spraying, blade coating, spin coating, or the like.
Further, the treatment condition of the constant temperature incubator in the step 2) is that the treatment time is 1 min-30 min.
The cellulose forward osmosis membrane prepared by the preparation method has an asymmetric pore structure, has excellent seawater desalination performance, is simple in preparation process and environment-friendly, and can be produced in a large scale.
The invention has the advantages that:
(1) the invention provides a preparation method of a high-flux cellulose forward osmosis membrane, which has the characteristics of simple operation, low cost and the like.
(2) The cellulose forward osmosis membrane prepared by the invention is constructed by a cellulose single-sided cellulose membrane etching strategy, has the characteristic of environmental protection, and is a low-carbon strategy.
(3) The cellulose forward osmosis membrane constructed by the invention has an asymmetric structure and comprises a compact layer and a porous conveying layer, so that the rapid transmission of water and the effective interception of salt ions are realized, and a choice can be provided for efficient seawater desalination.
Drawings
FIG. 1 is a field emission scanning electron microscope photograph of a raw cellulose film in example 1;
FIG. 2 is a field emission scanning electron microscope photograph of a cellulose forward osmosis membrane in example 1;
FIG. 3 is a graph comparing the filtration performance of the cellulose membrane and the cellulose forward osmosis membrane for a 1mol/L NaCl solution in example 1;
FIG. 4 is a graph showing the filtration performance of the cellulose forward osmosis membrane in example 1 against different salt solutions;
FIG. 5 is a field emission scanning electron microscope image of a cellulose forward osmosis membrane at different treatment times;
FIG. 6 is a photograph of a cellulose forward osmosis membrane at different treatment times;
FIG. 7 is the effect of cellulase treatment time on cellulose forward osmosis membrane performance.
Detailed Description
The invention provides a preparation method of a high-flux cellulose forward osmosis membrane, which comprises the following steps:
the present invention is further described below in conjunction with specific examples to enable those skilled in the art to better understand the present invention and to practice it, but the examples are not intended to limit the present invention.
Example 1
a. Dissolving pulp with the polymerization degree of 400 and the cellulose content of 90% in an NMMO/water solution, and then preparing an original cellulose membrane by adopting a phase separation technology through blade coating.
b. Coating cellulase solution on the upper surface of the cellulose membrane by adopting a spraying technology, wherein the dosage of the cellulase is 0.83 ml/m 2 。
c. Performing cellulase treatment in an incubator for the following treatment time: 30 min, treatment temperature: 40 ℃, treatment humidity: 60 percent.
The cellulose forward osmosis membrane obtained by the above steps, compared with the original cellulose membrane (fig. 1), the cellulose forward osmosis membrane treated by the cellulase presents a stacked structure (fig. 2), and is helpful for the transmission of water molecules and the retention of salt ions.
Example 2
a. Dissolving pulp with the polymerization degree of 500 and the cellulose content of 96% in an NMMO/water solution, and then preparing an original cellulose membrane by adopting a phase separation technology through blade coating.
b. Coating cellulase solution on the upper surface of the cellulose membrane by adopting a blade coating technology, wherein the dosage of the cellulase is 1.66 ml/m 2 。
c. And (3) performing cellulase treatment in an incubator for the following treatment time: 10 min, treatment temperature: 30 ℃, treatment humidity: 40 percent.
Compared with the original cellulose membrane, the cellulose forward osmosis membrane obtained by the steps has the advantages that the surface of the cellulose forward osmosis membrane treated by the cellulase presents a porous structure, and the transmission of water molecules and the interception of salt ions are facilitated.
Example 3
a. Dissolving pulp with the polymerization degree of 600 and the cellulose content of 94% in an NMMO/water solution, and then preparing an original cellulose film by adopting a phase separation technology through blade coating.
b. Coating cellulase solution on the upper surface of the cellulose membrane by adopting a spin coating technology, wherein the dosage of the cellulase is 1.66 ml/m 2 。
c. And (3) performing cellulase treatment in an incubator for the following treatment time: 10 min, treatment temperature: 60 ℃, treatment humidity: 60 percent.
Compared with the original cellulose membrane, the cellulose forward osmosis membrane obtained by the steps has the advantages that the surface of the cellulose forward osmosis membrane treated by the cellulase is in a porous structure, and the transmission of water molecules and the interception of salt ions are facilitated.
Example 4
a. Dissolving pulp with the polymerization degree of 400 and the cellulose content of 90% in an NMMO/water solution, and then preparing an original cellulose membrane by adopting a phase separation technology through blade coating.
b. Coating cellulase solution on the upper surface of the cellulose membrane by adopting a spin coating technology, wherein the dosage of the cellulase is 1.66 ml/m 2 。
c. And (3) performing cellulase treatment in an incubator for the following treatment time: 30 min, treatment temperature: 60 ℃, treatment humidity: 60 percent.
Compared with the original cellulose membrane, the cellulose forward osmosis membrane obtained by the steps has the advantage that the surface of the cellulose forward osmosis membrane presents more macropores by the excessive treatment of the cellulase.
Example 5
a. Dissolving pulp with the polymerization degree of 500 and the cellulose content of 96% in an NMMO/water solution, and then preparing an original cellulose membrane by adopting a phase separation technology through blade coating.
b. Coating cellulase solution on the upper surface of the cellulose membrane by adopting a spraying technology, wherein the dosage of the cellulase is 0.83 ml/m 2 。
c. And (3) performing cellulase treatment in an incubator for the following treatment time: 30 min, treatment temperature: 60 ℃, treatment humidity: 90 percent.
Compared with the original cellulose membrane, the cellulose forward osmosis membrane obtained by the steps has the advantages that the surface of the cellulose forward osmosis membrane treated by the cellulase presents pore structures with different sizes.
Example 6
a. Dissolving pulp with the polymerization degree of 600 and the cellulose content of 94% in an NMMO/water solution, and then preparing an original cellulose film by adopting a phase separation technology through blade coating.
b. Coating cellulase solution on the upper surface of the cellulose membrane by adopting a spraying technology, wherein the dosage of the cellulase is 0.83 ml/m 2 。
c. And (3) performing cellulase treatment in an incubator for the following treatment time: 10 min, treatment temperature: 30 ℃, treatment humidity: 40 percent.
Compared with the original cellulose membrane, the cellulose forward osmosis membrane obtained by the steps has a smaller pore structure on the surface.
FIGS. 1 and 2 are field emission scanning electron microscope images of a raw cellulose film and a cellulose forward osmosis film in example 1, respectively. The phase inversion method gives a special structure to the original cellulose membrane, the upper and lower surfaces are compact, and the middle part is porous (figure 1). The cellulase treatment in example 1 resulted in the disruption of the dense surface of the cellulose membrane, significantly increasing its pore size and porosity (fig. 2).
The invention only coats the cellulase on the upper surface of the original cellulose film to destroy the compact structure of the upper surface, but does not influence the compact structure of the lower surface. Such behavior ultimately initiates the asymmetric pore structure of the cellulosic material. The porous layer of the cellulose forward osmosis membrane can effectively transport water molecules, the compact layer of the cellulose forward osmosis membrane can reject salt ions in the system, and the water flux of the cellulose forward osmosis membrane reaches 135.75 LMH, which is 17 times that of the original cellulose membrane (figure 3).
The cellulose forward osmosis membrane also exhibited higher water flux (greater than 120 LMH) and lower brine ratio (less than 0.53 gL −1 ）。
The cellulose forward osmosis membrane has good desalting performance and is also suitable for separating other salt solutions. For example, 1M Na 2 SO 4 And MgCl 2 The system, also exhibiting a high water flux (167.75, 174.25 LMH), while maintaining a low brine ratio (0.14 g:. L:. mark) −1 ，0.12 g⋅L −1 ) (FIG. 4).
The appearance of the cellulose forward osmosis membrane was observed by different cellulase treatment times, and it was found that the pore size of the surface of the cellulose forward osmosis membrane gradually increased as the cellulase treatment time was prolonged (fig. 5). Too long cellulase treatment time can cause excessive damage to the cellulose forward osmosis membrane (figure 6), so that the structure of the cellulose forward osmosis membrane is broken, and the working stability of the cellulose forward osmosis membrane is reduced.
Appropriate extension of the cellulase treatment time can enhance the permeability of cellulose forward osmosis membranes (fig. 7).
Other reagents used in the present invention are commercially available or formulated in the prior art, and will not be described again.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitutions or changes made by the person skilled in the art on the basis of the present invention are all within the protection scope of the present invention. The protection scope of the invention is subject to the claims.
Claims (6)
1. A preparation method of a high-flux cellulose forward osmosis membrane is characterized by comprising the following steps: a cellulose forward osmosis membrane with an asymmetric pore structure is constructed by utilizing a cellulase etching method to realize high-performance fresh water collection, and the method comprises the following steps:
1) dissolving cellulose in the solution, and obtaining a cellulose membrane by a phase inversion method;
2) coating a cellulose membrane with a cellulase solution on one side, and then placing the cellulose membrane into a constant-temperature incubator for treatment to obtain the cellulose forward osmosis membrane with the asymmetric pore structure.
2. The method of claim 1, wherein: the phase inversion method of the cellulose membrane in the step 1) adopts a blade coating mode.
3. The method of claim 1, wherein: the cellulase in step 2) may be coated on the upper surface or the lower surface of the cellulose film.
4. The production method according to claim 1, characterized in that: the dosage of the cellulase in the step 2) is 0.1-2 ml/m 2 。
5. The method of claim 1, wherein: the cellulase in the step 2) is coated in a spraying, blade coating or spin coating mode.
6. The method of claim 1, wherein: the treatment condition of the constant-temperature incubator in the step 2) is 30-60 ℃, the treatment time is 1-30 min, and the treatment humidity is 40-90%.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001092382A1 (en) * | 2000-06-01 | 2001-12-06 | Ucb S.A. | Films and uses thereof |
| CN102228801A (en) * | 2011-05-16 | 2011-11-02 | 何涛 | Hydrophobically modified distillation membrane material of high throughout and high salt rejection rate and application thereof |
| CN103785301A (en) * | 2014-02-13 | 2014-05-14 | 中国科学院上海高等研究院 | Cellulose acetate forward osmosis film material and preparation method thereof |
| CN105597551A (en) * | 2015-10-16 | 2016-05-25 | 福建农林大学 | Production method of regenerated cellulose nanofiltration membrane |
| JP2016129220A (en) * | 2014-11-27 | 2016-07-14 | ユニバーシティ マラヤ | Manufacturing method of nanowire |
| CN107441960A (en) * | 2017-08-02 | 2017-12-08 | 同济大学 | The preparation method of high-performance Triafol T forward osmosis membrane |
| CN107855007A (en) * | 2017-07-13 | 2018-03-30 | 枫科(北京)膜技术有限公司 | A kind of asymmetric forward osmosis membrane and preparation method thereof |
| CN113084960A (en) * | 2021-04-26 | 2021-07-09 | 齐鲁工业大学 | Corn straw board and preparation method thereof |
| CN113201934A (en) * | 2021-04-27 | 2021-08-03 | 苏州大学 | Water-based super-hydrophobic coating and preparation method and application thereof |
-
2022
- 2022-06-24 CN CN202210721144.0A patent/CN114984779A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001092382A1 (en) * | 2000-06-01 | 2001-12-06 | Ucb S.A. | Films and uses thereof |
| CN102228801A (en) * | 2011-05-16 | 2011-11-02 | 何涛 | Hydrophobically modified distillation membrane material of high throughout and high salt rejection rate and application thereof |
| CN103785301A (en) * | 2014-02-13 | 2014-05-14 | 中国科学院上海高等研究院 | Cellulose acetate forward osmosis film material and preparation method thereof |
| JP2016129220A (en) * | 2014-11-27 | 2016-07-14 | ユニバーシティ マラヤ | Manufacturing method of nanowire |
| CN105597551A (en) * | 2015-10-16 | 2016-05-25 | 福建农林大学 | Production method of regenerated cellulose nanofiltration membrane |
| CN107855007A (en) * | 2017-07-13 | 2018-03-30 | 枫科(北京)膜技术有限公司 | A kind of asymmetric forward osmosis membrane and preparation method thereof |
| CN107441960A (en) * | 2017-08-02 | 2017-12-08 | 同济大学 | The preparation method of high-performance Triafol T forward osmosis membrane |
| CN113084960A (en) * | 2021-04-26 | 2021-07-09 | 齐鲁工业大学 | Corn straw board and preparation method thereof |
| CN113201934A (en) * | 2021-04-27 | 2021-08-03 | 苏州大学 | Water-based super-hydrophobic coating and preparation method and application thereof |
Non-Patent Citations (2)
| Title |
|---|
| YAN CHENG等: "A novel strategy for fabricating robust superhydrophobic fabrics by environmentally-friendly enzyme etching", CHEMICAL ENGINEERING JOURNAL, vol. 355, pages 291 * |
| YUAN HONGMEI等: "Engineered Janus cellulose membrane with the asymmetric-pore structure for the superhigh-water flux desalination", CARBOHYDRATE POLYMERS, vol. 291, no. 2022, pages 119601 * |
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