CN116392972B - Forward osmosis membrane applied to emergency water treatment, preparation method and application - Google Patents
Forward osmosis membrane applied to emergency water treatment, preparation method and application Download PDFInfo
- Publication number
- CN116392972B CN116392972B CN202310658615.2A CN202310658615A CN116392972B CN 116392972 B CN116392972 B CN 116392972B CN 202310658615 A CN202310658615 A CN 202310658615A CN 116392972 B CN116392972 B CN 116392972B
- Authority
- CN
- China
- Prior art keywords
- layer
- water
- water outlet
- forward osmosis
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 313
- 239000012528 membrane Substances 0.000 title claims abstract description 79
- 238000009292 forward osmosis Methods 0.000 title claims abstract description 74
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 129
- 239000002994 raw material Substances 0.000 claims abstract description 66
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 49
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 49
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 49
- 238000000034 method Methods 0.000 claims description 36
- 229920002492 poly(sulfone) Polymers 0.000 claims description 28
- 229920000728 polyester Polymers 0.000 claims description 26
- 229920000642 polymer Polymers 0.000 claims description 26
- 238000010041 electrostatic spinning Methods 0.000 claims description 24
- 238000009987 spinning Methods 0.000 claims description 23
- 239000011148 porous material Substances 0.000 claims description 21
- 229920001610 polycaprolactone Polymers 0.000 claims description 15
- 239000004632 polycaprolactone Substances 0.000 claims description 15
- 239000002121 nanofiber Substances 0.000 claims description 10
- 239000004952 Polyamide Substances 0.000 claims description 9
- 239000002798 polar solvent Substances 0.000 claims description 9
- 229920002647 polyamide Polymers 0.000 claims description 9
- 239000004753 textile Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- 239000004695 Polyether sulfone Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 229920006393 polyether sulfone Polymers 0.000 claims description 6
- 238000001523 electrospinning Methods 0.000 claims description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 4
- 229920002401 polyacrylamide Polymers 0.000 claims description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 4
- 230000004048 modification Effects 0.000 claims description 3
- 238000012986 modification Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims 1
- 230000009471 action Effects 0.000 abstract description 11
- 230000003204 osmotic effect Effects 0.000 abstract description 8
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 239000000243 solution Substances 0.000 description 166
- 238000005266 casting Methods 0.000 description 118
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 32
- GLUUGHFHXGJENI-UHFFFAOYSA-N Piperazine Chemical compound C1CNCCN1 GLUUGHFHXGJENI-UHFFFAOYSA-N 0.000 description 28
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 26
- 239000011248 coating agent Substances 0.000 description 25
- 238000000576 coating method Methods 0.000 description 25
- 238000003756 stirring Methods 0.000 description 25
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 24
- 229910052782 aluminium Inorganic materials 0.000 description 24
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 24
- 239000011888 foil Substances 0.000 description 24
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 22
- UWCPYKQBIPYOLX-UHFFFAOYSA-N benzene-1,3,5-tricarbonyl chloride Chemical compound ClC(=O)C1=CC(C(Cl)=O)=CC(C(Cl)=O)=C1 UWCPYKQBIPYOLX-UHFFFAOYSA-N 0.000 description 15
- 230000007613 environmental effect Effects 0.000 description 11
- 239000011780 sodium chloride Substances 0.000 description 11
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 9
- DTQVDTLACAAQTR-UHFFFAOYSA-N Trifluoroacetic acid Chemical compound OC(=O)C(F)(F)F DTQVDTLACAAQTR-UHFFFAOYSA-N 0.000 description 8
- 239000013535 sea water Substances 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 150000004985 diamines Chemical class 0.000 description 6
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 230000004907 flux Effects 0.000 description 5
- 238000001471 micro-filtration Methods 0.000 description 5
- 239000012527 feed solution Substances 0.000 description 4
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 description 4
- 238000001728 nano-filtration Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000000108 ultra-filtration Methods 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000012466 permeate Substances 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 238000001223 reverse osmosis Methods 0.000 description 3
- -1 salt ions Chemical class 0.000 description 3
- WZCQRUWWHSTZEM-UHFFFAOYSA-N 1,3-phenylenediamine Chemical compound NC1=CC=CC(N)=C1 WZCQRUWWHSTZEM-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000001112 coagulating effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 235000020188 drinking water Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- ZSIAUFGUXNUGDI-UHFFFAOYSA-N hexan-1-ol Chemical compound CCCCCCO ZSIAUFGUXNUGDI-UHFFFAOYSA-N 0.000 description 2
- 229940018564 m-phenylenediamine Drugs 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000008213 purified water Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 230000032895 transmembrane transport Effects 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 238000012695 Interfacial polymerization Methods 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 240000004808 Saccharomyces cerevisiae Species 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000000614 phase inversion technique Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000001338 self-assembly Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
- 238000001132 ultrasonic dispersion Methods 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
Classifications
-
- 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
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/002—Forward osmosis or direct osmosis
-
- 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
- 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
- B01D67/0011—Casting solutions therefor
-
- 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
- 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
- C02F1/445—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
- B01D2323/39—Electrospinning
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Water Supply & Treatment (AREA)
- Dispersion Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides a forward osmosis membrane applied to emergency water treatment, a preparation method and application thereof, belongs to the technical field of water treatment, and relates to the technical field of forward osmosis membranes. The forward osmosis membrane comprises a first active layer, a first supporting layer, a middle water outlet layer, a second supporting layer and a second active layer which are sequentially arranged along the permeation direction of water molecules, and the forward osmosis membrane can outlet water from the middle water outlet layer on the circumferential side edge of the forward osmosis membrane. When the device is used, water in the raw material liquid sequentially passes through the first active layer and the first support layer under the action of osmotic pressure and then enters the middle water outlet layer, one part of water flows out of the middle water outlet layer, and the other part of water sequentially passes through the second support layer and the second active layer and then enters the drawing liquid. On the one hand, clean water can be directly obtained; on the other hand, the water amount absorbed by the drawing liquid can be reduced, and the service period of the drawing liquid can be prolonged. The forward osmosis membrane is particularly useful in emergency water treatment scenarios where it is difficult to use external equipment and power.
Description
Technical Field
The invention belongs to the technical field of water treatment, relates to the technical field of forward osmosis membranes, and particularly relates to a forward osmosis membrane applied to emergency water treatment, a preparation method and application.
Background
Water is an important resource for all life, including humans, to survive and is also the most important component of organisms. In disasters, accidents or field operations, most drinking water supplies need to be prepared on site. However, a clean water source is often not obtained, and organic matters, inorganic matters, heavy metals, bacteria, viruses and the like harmful to human bodies often exist in the obtained water source. Therefore, it is important to find a portable emergency water treatment device that can accommodate various water sources.
Currently, the most used membrane emergency water treatment equipment is membrane method, and the used membranes comprise micro-filtration membranes, ultrafiltration membranes, nanofiltration membranes, reverse osmosis membranes and forward osmosis membranes. The microfiltration membrane mainly intercepts particles with the particle size of 50-500 nm, and comprises reserved yeast, fungus substances and the like; the ultrafiltration membrane mainly intercepts macromolecules such as colloidal solids, proteins, polysaccharides and the like with the particle size of 2-50 nm; the nanofiltration membrane is mainly used for intercepting small molecular organic matters and high-valence salt ions with the particle size less than 2 nm; reverse osmosis and forward osmosis membranes are used primarily to retain monovalent and divalent ions in water, generally allowing only water molecules to pass through. In these membranes, other techniques, in addition to forward osmosis techniques, require the use of externally applied pressure provided by external equipment. The operating pressure of Microfiltration (MF) is within the range of 0.01-0.1 MPa, the operating pressure of Ultrafiltration (UF) is within the range of 0.1-0.5 MPa, the operating pressure of Nanofiltration (NF) is within the range of 0.5-1 MPa, and Reverse Osmosis (RO) is required to realize the liquid separation process under a larger external pressure (1-10 MPa). Forward Osmosis (FO) technology is a spontaneous transmembrane transport process that utilizes the osmotic pressure difference across a solution to achieve water molecules, and is a naturally occurring osmotic process. Forward osmosis does not require the use of external equipment and power and is therefore well suited for emergency water treatment.
The prior art forward osmosis membrane generally comprises a supporting layer and an active layer, wherein the drawing liquid and the raw material liquid are respectively positioned at two sides of the forward osmosis membrane, and under the action of osmotic pressure, water in the raw material liquid enters the drawing liquid through the forward osmosis membrane, and if the drawing liquid is to be reused, the drawing liquid can only be concentrated. And in this process, clean water cannot be directly obtained.
The invention patent CN 110563087A discloses a preparation method of a forward osmosis emergency drinking water bag based on a layer-by-layer self-assembly method, wherein the water bag uses a drawing liquid to draw water in raw material liquid, a purified water solution containing the drawing liquid is obtained, and the method cannot directly separate the drawing liquid and water to obtain clean water.
Disclosure of Invention
In view of the above-mentioned drawbacks or shortcomings of the prior art, the present invention provides a forward osmosis membrane, a method of preparation and use thereof, which can be used for emergency water treatment with clean water directly obtained.
It is an object of the present invention to provide a forward osmosis membrane for emergency water treatment, which comprises a first active layer, a first support layer, a middle water outlet layer, a second support layer and a second active layer sequentially arranged in the permeation direction of water molecules, and which can outlet water from the middle water outlet layer on the circumferential side thereof.
The middle water outlet layer comprises a reticular textile layer made of polyester or polycaprolactone, and the thickness of the middle water outlet layer is 40-60 mu m.
The first active layer and the second active layer are polyamide layers, and the first support layer and the second support layer are each independently polysulfone layers or polyethersulfone layers.
Preferably, the intermediate water-out layer comprises blend modification of polyester or polycaprolactone with the first polymer.
Preferably, the middle water outlet layer is a nanofiber mesh textile layer formed by adopting an electrostatic spinning method.
Preferably, the first support layer is blend modified with a second polymer and the second support layer is blend modified with a third polymer.
The thickness of the first supporting layer is 20-40 mu m, and the thickness of the second supporting layer is 20-40 mu m.
Preferably, the thicknesses of the first active layer and the second active layer are 2-8 μm, the pore diameters of the first active layer and the second active layer are 3-25 nm, and the first active layer and the second active layer are polyamide layers with regular stripe structures.
Another object of the present invention is to provide a method for producing a forward osmosis membrane, comprising: first, a middle water outlet layer is formed, then a first support layer and a second support layer are formed on two sides of the middle water outlet layer, and then a first active layer is formed on the first support layer and a second active layer is formed on the second support layer at the same time.
Preferably, an intermediate water-out layer is formed by an electrospinning method.
The method for forming the intermediate water outlet layer by adopting the electrostatic spinning method comprises the following steps:
firstly, dissolving polyester or polycaprolactone in a polar solvent to prepare a solute spinning solution, after defoaming, carrying out electrostatic spinning on the spinning solution to form a nanofiber reticular spinning layer, and then drying.
It is a further object of the present invention to provide a use of the forward osmosis membrane for emergency water bags.
The emergency water bag comprises the forward osmosis membrane.
Preferably, the emergency water bag further comprises:
the raw material liquid cavity is arranged on one side of a first active layer of the forward osmosis membrane, the cavity wall of the raw material liquid cavity is bonded with the periphery of one side of the first active layer, which is far away from the middle part, and a first liquid inlet is formed in the raw material liquid cavity;
the liquid sucking cavity is arranged on one side of the second active layer of the forward osmosis membrane, the cavity wall of the liquid sucking cavity is bonded with the periphery of one side of the second active layer, which is far away from the middle part, and a second liquid inlet is formed in the liquid sucking cavity;
the raw material liquid cavity is communicated with the drawing liquid cavity through the middle part of the forward osmosis membrane;
the water purifying cavity is arranged around the raw material liquid cavity and the drawing liquid cavity, the circumferential side edge part of the forward osmosis membrane is arranged in the water purifying cavity, and a first water outlet is arranged on the water purifying cavity.
Preferably, a first supporting part is further arranged in the raw material liquid cavity, and through dense-mesh holes are formed in the first supporting part.
The beneficial effects of the invention include:
through setting up first active layer, first supporting layer, middle play water layer, second supporting layer and the second active layer of arranging in proper order along the infiltration direction of water, middle play water layer can be in go out water on the side all around of forward osmosis membrane. When the device is used, the raw material liquid is positioned on one side of the first active layer, the drawing liquid is positioned on one side of the second active layer, water in the raw material liquid sequentially passes through the first active layer and the first support layer under the action of osmotic pressure and then enters the middle water outlet layer, one part of water flows out from the middle water outlet layer, and the other part of water sequentially passes through the second support layer and the second active layer and then enters the drawing liquid. On the one hand, purified water can be directly obtained; on the other hand, as a portion of the water is removed from the intermediate water outlet layer, the water entering the draw solution is reduced, and the service life of the draw solution can be prolonged. The forward osmosis membrane is particularly suitable for application in emergency water treatment scenarios where the use of external equipment and power is difficult.
Drawings
FIG. 1 is a schematic cross-sectional structure of a forward osmosis membrane;
FIG. 2 is a schematic perspective view of an emergency water bag;
FIG. 3 is a schematic sectional view of an emergency water bag;
fig. 4 is a schematic cross-sectional view of an emergency water bag having a liquid drawing chamber.
Wherein, the label is as follows: 10. a forward osmosis membrane; 11. a first active layer; 12. a first support layer; 13. a middle water outlet layer; 14. a second support layer; 15. a second active layer; 20. a raw material liquid cavity; 21. a first support portion; 22. a first raw material liquid cavity; 23. a second raw material liquid cavity; 24. a first liquid inlet; 30. a draw solution chamber; 31. a second liquid inlet; 40. a water purifying cavity; 41. a first water outlet; 42. a raw material liquid cavity wall.
Detailed Description
In the following description, certain specific details are included to provide a thorough understanding of various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details, or with other methods, components, materials, etc.
Unless otherwise required by the present invention, the words "comprise" and "comprising" are to be interpreted in an open, inclusive sense, i.e. "including but not limited to.
Reference throughout this specification to "one embodiment" or "an embodiment" or "one preferred embodiment" or "certain embodiments" means that a particular reference element, structure, or feature described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrase "in one embodiment" or "in an embodiment" or "in a preferred embodiment" or "in certain embodiments" appearing in various places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular elements, structures, or features may be combined in any suitable manner in one or more embodiments.
According to a first aspect of the present invention, there is provided a forward osmosis membrane for emergency water treatment, as shown in fig. 1, comprising a first active layer 11, a first support layer 12, a middle water outlet layer 13, a second support layer 14 and a second active layer 15 sequentially arranged in the permeation direction of water molecules, the forward osmosis membrane being capable of discharging water from the middle water outlet layer 13 on the circumferential side thereof.
When the device is used, the raw material liquid is positioned on one side of the first active layer 11, the drawing liquid is positioned on one side of the second active layer 15, water in the raw material liquid sequentially passes through the first active layer 11 and the first support layer 12 under the action of osmotic pressure and then enters the middle water outlet layer 13, one part of water flows out of the middle water outlet layer 13, and the other part of water sequentially passes through the second support layer 14 and the second active layer 15 and then enters the drawing liquid.
Further, as water flows out from the middle water outlet layer, a certain pressure difference can be formed at different positions of the middle water outlet layer, water molecules are further promoted to enter the middle water outlet layer from the raw material liquid at one side of the first active layer 11 under the action of osmotic pressure, and the water flux is increased.
Preferably, the middle water outlet layer 13 comprises a mesh textile layer made of polyester or polycaprolactone, and the thickness of the middle water outlet layer 13 is 40-60 μm.
Preferably, the first active layer 11 and the second active layer 15 are polyamide layers, and the first support layer 12 and the second support layer 14 are each independently a polysulfone layer or a polyethersulfone layer.
On the one hand, the middle water outlet layer is made of polyester or polycaprolactone with better flexibility, the composite strength between the first support layer and the second support layer made of polysulfone or polyethersulfone and the middle water outlet layer is stronger, and the service life is prolonged; in the second aspect, the middle water outlet layer of the net-shaped textile structure has no small holes or a structure for closing the holes, so that the transmission resistance of water molecules in the vertical direction is small, and the water molecules can smoothly flow out from the middle water outlet layer.
In the present invention, when the thickness of the middle water outlet layer is less than 40 μm, the resistance of water flowing in the vertical direction is too large, and the flux of water outlet from the middle water outlet layer is small; when the thickness of the middle water outlet layer is larger than 60 mu m, the resistance of water in the horizontal permeation direction is larger, so that the forward permeation process of the water under the action of osmotic pressure is greatly influenced, and the efficiency of the whole permeation process is low. Thus, the thickness of the intermediate water-out layer is 40 to 60 μm, for example 40 μm, 42 μm, 44 μm, 46 μm, 48 μm, 50 μm, 52 μm, 56 μm, 58 μm, 60 μm.
In a preferred embodiment of the invention, the intermediate water outlet layer 13 comprises blend modification of polyester or polycaprolactone with the first polymer.
Preferably, the first polymer comprises one or more of polyacrylamide, polyvinyl alcohol or polyvinylpyrrolidone, preferably polyvinylpyrrolidone.
The middle water outlet layer is modified, so that the composite strength between the middle water outlet layer and the first support layer and the second support layer can be increased on the one hand; on the other hand, the transmission resistance of water molecules can be weakened, and the water can flow out of the middle water outlet layer more smoothly.
In a preferred embodiment of the present invention, the intermediate water outlet layer 13 is a nanofiber mesh textile layer formed by an electrospinning method.
Electrostatic spinning means that the spinning solution overcomes the surface tension of the solution under the action of a high-voltage electric field to form jet flow, and flies to the low-voltage electric field, the charged jet flow is drawn under the action of repulsive force of the electric field, and simultaneously the organic solvent volatilizes, the jet flow is formed, and the nanofiber is deposited on a receiver. When a flat plate receiver is used, a random arrangement of nanofiber mesh textile layers is obtained.
In the invention, the electrostatic spinning method is used for forming the nanofiber reticular textile layer as the middle water outlet layer, which is beneficial to precisely controlling the thickness of the middle water outlet layer on one hand; on the other hand, the internal structure of the middle water outlet layer obtained by the electrostatic spinning method is more uniform, which is beneficial to reducing the resistance of water molecules when the middle water outlet layer flows.
In a preferred embodiment of the present invention, the first support layer 12 is blend modified with a second polymer and the second support layer 14 is blend modified with a third polymer.
In the invention, the first support layer and the second support layer are modified, on one hand, the pore size distribution state and the porosity of the internal structure can be optimized, and the transportation of water molecules can be promoted; in the second aspect, the composite strength of the first supporting layer and the second supporting layer and the middle water outlet layer is improved. The surfaces of the modified first supporting layer and the modified second supporting layer are uniform pore structures, the cross section is a uniform and compact spongy structure, the substrates with uniform pore structure distribution can provide favorable attachment sites for the load of the active layer, and the active layer with lower roughness is generated on the surface of the porous supporting layer.
Preferably, the thickness of the first supporting layer 12 is 20-40 μm, and the pore diameter of the first supporting layer 12 is 5-20 nm.
Preferably, the thickness of the second supporting layer 14 is 20-40 μm, and the pore diameter of the second supporting layer 14 is 5-20 nm.
The smaller the thickness of the supporting layer is, the shorter the water molecule transmembrane transport path is, the smaller the mass transfer resistance is, and the water flux is improved. In the present invention, when the thicknesses of the first support layer and the second support layer are greater than 40 μm, the water flux decrease tendency of the membrane becomes large; when the thicknesses of the first support layer and the second support layer are less than 20 μm, the support strength is significantly reduced. Therefore, the thickness of the first support layer and the second support layer is preferably 20 to 40 μm, for example, 21 μm, 23 μm, 25 μm, 28 μm, 31 μm, 33 μm, 35 μm, 38 μm or 40 μm, independently of each other.
The thickness of the first support layer 12 and the second support layer 14 may be the same or different.
Preferably, the second polymer and the third polymer each independently comprise one or more of polyacrylamide, polyvinyl alcohol or polyvinylpyrrolidone, preferably polyvinylpyrrolidone.
Preferably, in order to obtain a better water outlet effect, the thickness of the first supporting layer is smaller than that of the second supporting layer.
In a preferred embodiment of the present invention, the first polymer, the second polymer and the third polymer use the same polymer.
In a preferred embodiment of the present invention, the thickness of the first active layer 11 and the second active layer 15 is 2-8 μm.
In the present invention, the thickness of the first active layer 11 and the second active layer 15 is, for example, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm or 8 μm.
Preferably, the pore diameters of the first active layer 11 and the second active layer 15 are 3-25 nm.
In the present invention, the pore diameters of the first active layer 11 and the second active layer 15 are, for example, 3nm, 5nm, 8nm, 10nm, 12nm, 15nm, 17nm, 20nm, 22nm or 25nm.
Preferably, the porosity of the forward osmosis membrane is 70% -90%.
In the present invention, the porosity of the forward osmosis membrane is, for example, 70%, 72%, 75%, 77%, 80%, 82%, 85%, 88% or 90%.
Preferably, the first active layer 11 and the second active layer 15 are polyamide layers with regular stripe structures, and polyamide as the active layer has the advantages of good hydrophilicity, high rejection rate, excellent biodegradability and the like, and the polyamide active layer with the regular stripe structures can further increase the water flux and the rejection performance of the membrane.
According to a second aspect of the present invention, there is provided a method for producing a forward osmosis membrane, the method comprising: first, a middle water outlet layer is formed, then a first support layer and a second support layer are formed on two sides of the middle water outlet layer, and then a first active layer is formed on the first support layer and a second active layer is formed on the second support layer at the same time.
In a preferred embodiment of the present invention, an intermediate water-out layer is formed by electrospinning.
In the invention, the electrostatic spinning method is used for forming the middle water outlet layer of the nanofiber, which is beneficial to precisely controlling the thickness of the middle water outlet layer on one hand; on the other hand, the obtained internal structure of the middle water outlet layer is more uniform, which is beneficial to reducing the resistance of water molecules when the middle water outlet layer flows.
Preferably, the method for forming the intermediate water-out layer by using the electrospinning method comprises the steps of:
Firstly, dissolving polyester or polycaprolactone in a polar solvent to prepare a solute spinning solution, after defoaming, carrying out electrostatic spinning on the spinning solution to form a nanofiber reticular spinning layer, and then drying.
Preferably, the polar solvent comprises one or more of dichloromethane, chloroform, carbon tetrachloride or trifluoroacetic acid.
In the present invention, the polar solvent is, for example, methylene chloride, chloroform, carbon tetrachloride, trifluoroacetic acid, methylene chloride and chloroform, chloroform and trifluoroacetic acid, or a combination of chloroform, carbon tetrachloride and trifluoroacetic acid.
Preferably, the spinning solution comprises the following raw materials in parts by weight: 15-20 parts of polyester or polycaprolactone, 80-85 parts of polar solvent and 0-5 parts of first polymer.
In the present invention, the polyester or polycaprolactone is, for example, 15.2 parts, 15.5 parts, 16 parts, 16.5 parts, 17 parts, 17.5 parts, 18 parts, 18.5 parts, 19 parts, 19.5 parts, or 19.9 parts.
The polar solvent is, for example, 80.1 parts, 80.5 parts, 81 parts, 81.5 parts, 82 parts, 82.5 parts, 83 parts, 83.5 parts, 84 parts, 84.5 parts, or 84.9 parts.
The first polymer is, for example, 0.1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, or 4.9 parts.
Specifically, the method for forming the intermediate water outlet layer by adopting the electrostatic spinning method comprises the following steps: and (3) dissolving polyester or polycaprolactone and optionally a first polymer in a polar solvent, stirring at room temperature for 3-4 hours, and then adopting a needle head with the thickness of 0.2-0.6 mm, the voltage of 16-20 KV, the temperature of 20-28 ℃, controlling the spinning speed to be 0.05-0.15 mm/min and the environment humidity to be 40% -60%, and carrying out electrostatic spinning by taking an aluminum foil as a receiver.
Preferably, the method of forming an intermediate water outlet layer further comprises: transferring the aluminum foil into a vacuum drying oven, and drying for 12-24 hours at the temperature of 25-60 ℃.
Preferably, the method for forming the intermediate water outlet layer further comprises stirring at room temperature, performing ultrasonic dispersion, and defoaming.
Specifically, polyester or polycaprolactone is dissolved in a polar solvent, stirred at room temperature for 3-4 hours, and then placed in an ultrasonic cleaner for ultrasonic vibration for 15-30 minutes, so that the polyester or polycaprolactone is more fully dissolved.
Preferably, the first support layer and the second support layer are formed on both sides of the middle water outlet layer, respectively, using a phase inversion method, including: the method comprises the steps of uniformly coating a casting solution on one side of a middle water outlet layer, immersing the casting solution in a coagulating bath to form a first supporting layer, drying, uniformly coating the casting solution on the other side of the middle water outlet layer, immersing the casting solution in the coagulating bath to form a second supporting layer, and drying.
Specifically, the casting film liquid comprises the following raw materials in parts by weight: 10-20 parts of polysulfone and/or polyethersulfone, 0-5 parts of a first polymer or a second polymer and 100 parts of N-methylpyrrolidone.
Specifically, after heating N-methyl pyrrolidone to 50-60 ℃, adding polysulfone and/or polyether sulfone and optionally a first polymer or optionally a second polymer, stirring for 5-10 hours to obtain yellowish uniform and transparent casting solution, defoaming the casting solution, uniformly coating the casting solution on the outer wall of the reinforcing layer, and then soaking in water to form a first supporting layer or a second supporting layer.
Preferably, the first active layer and the second active layer are simultaneously formed using an interfacial polymerization method, which comprises immersing the film after the formation of the first support layer and the second support layer in a diamine solution, taking out the film, air-drying the surface of the film, immersing in a trimesic chloride solution, and forming the first active layer and the second active layer after the reaction.
The diamine solution is an aqueous solution of m-phenylenediamine, piperazine or hexamethylenediamine, and the solvent of the trimesoyl chloride solution is one or more of n-hexane, cyclohexane and n-hexanol.
Preferably, the diamine solution comprises 100 parts of water and 1.5-2.5 parts of m-phenylenediamine, piperazine or hexamethylenediamine, and the trimesoyl chloride solution comprises 100 parts of n-hexane and 0.08-0.15 part of solvent.
Preferably, the diamine solution further comprises 0-7.5 parts of polyvinylpyrrolidone.
In the invention, the hydrogen bond formed by polyvinylpyrrolidone and diamine has stronger interaction force, and the diffusion rate of anhydrous piperazine in aqueous solution can be weakened, so that the polyamide active layer with a regular stripe structure is formed.
Preferably, the reaction temperature for forming the first active layer and the second active layer is 15 ℃ to 45 ℃.
Specifically, the membrane after forming the first support layer and the second support layer is soaked in an aqueous solution of diamine for 1-3 min, the membrane is taken out, the surface of the membrane is air-dried, then the membrane is soaked in a solution of trimesic chloride, the reaction is carried out for 0.5-1.5 min at 15-45 ℃, and then the forward osmosis membrane forming the first active layer and the second active layer is taken out and dried.
According to a third aspect of the present invention there is provided the use of the forward osmosis membrane in an emergency water bag.
The emergency water bag includes the forward osmosis membrane 10.
In a preferred embodiment of the present invention, the emergency water bag further includes:
the raw material liquid cavity 20 is arranged on the side of the first active layer 11 of the forward osmosis membrane 10, the cavity wall of the raw material liquid cavity 20 is adhered to the periphery of the side of the first active layer away from the middle part, and a first liquid inlet 24 is arranged on the raw material liquid cavity 20.
The drawing liquid cavity 30 is arranged on one side of the second active layer 15 of the forward osmosis membrane 10, the cavity wall of the drawing liquid cavity 30 is bonded with the periphery of one side of the second active layer, which is far away from the middle part, and a second liquid inlet 31 is arranged on the drawing liquid cavity 30.
The feed solution chamber 20 and the draw solution chamber 30 communicate through the middle portion of the forward osmosis membrane 10.
A water purifying cavity 40 is arranged around the raw material liquid cavity 20 and the drawing liquid cavity 30, the circumferential side edge part of the forward osmosis membrane 10 is arranged inside the water purifying cavity 40, and a first water outlet 41 is arranged on the water purifying cavity 40.
The feed solution chamber 20 is used for holding feed solution derived from available unclean water. The draw solution chamber 30 is used for containing draw solution, which can be prepared from draw solution solute and unclean water, or directly contained in the second chamber. In particular, the draw solution may be a high strength brine or a high strength beverage formulated from electrolytes and nutrients that is directly drinkable after dilution with water that permeates into the draw solution chamber. The clean water chamber 40 is used for containing filtered clean water, and the clean water can be directly drunk.
In a specific application scenario, raw material liquid is added into the raw material liquid cavity 20, drawing liquid is added into the drawing liquid cavity 30, the water permeation process is started by shaking the emergency water bag, then the water permeation effect is started under the action of the drawing liquid, water in the raw material liquid sequentially permeates through the first active layer 11 and the first supporting layer 12 from the raw material liquid cavity 20 and then enters the middle water outlet layer 13, one part of water enters the water purification cavity 40 from the middle water outlet layer 13 of the circumferential side wall of the permeable membrane 10 under the action of static pressure, and the other part of water enters the drawing liquid cavity 30 under the action of the drawing liquid.
Preferably, the walls of the feed solution chamber 20 and the walls of the draw solution chamber 30 are each made of a flexible material. The flexible material is for example polyethylene or polypropylene.
Specifically, as shown in fig. 3, the middle portion of the forward osmosis membrane 10 is bonded between the raw material liquid chamber 20 and the drawing liquid chamber 30. The water purifying chamber 40 is disposed around the raw material liquid chamber 20 and the drawing liquid chamber 30, and as shown in fig. 3, the water purifying chamber 40 is formed by a portion near the edge of the outside of the chamber wall of the raw material liquid chamber 20 and a portion near the edge of the inside of the chamber wall of the drawing liquid chamber 30. The part of the outer side of the cavity wall of the raw material liquid cavity 20, which is close to the edge, is the peripheral outer side part of the bonding part of the cavity wall of the raw material liquid cavity and the forward osmosis membrane. The part of the inner side of the cavity wall of the drawing liquid cavity 30, which is close to the edge, is the peripheral outer side part of the bonding part of the cavity wall of the drawing liquid cavity and the forward osmosis membrane.
As shown in fig. 3, the circumferential side of the forward osmosis membrane 10 is located inside the water purification chamber 40, and the circumferential side of the forward osmosis membrane 10 protrudes into the water purification chamber 40. Clean water is discharged from the circumferential side wall of the forward osmosis membrane 10 through the intermediate water discharge layer 13 into the clean water chamber 40.
As shown in fig. 2, the first water outlet 41 of the water purifying chamber 40 is opened and closed by a cap with threads.
The first water outlet 41 may be further connected to a direct suction pipe, so that in the process of drinking the clean water in the clean water cavity 40, the clean water in the middle water outlet layer 13 is promoted to enter the clean water cavity 40 along with the suction of the clean water, and a pressure difference is further formed in the middle water outlet layer, so that the water is further promoted to permeate from the raw material liquid cavity 20 into the middle water outlet layer 13.
As shown in fig. 2, the first inlet 24 and the second inlet 31 are opened and closed by a threaded cap.
As shown in fig. 3 and 4, the number of the drawing liquid chambers 30 is one or two, and the number of the water purifying chambers 40 is one or two.
As shown in fig. 3, when the number of the drawing liquid chambers 30 and the water purifying chambers 40 is two, one drawing liquid chamber 30 and one water purifying chamber 40 are located at one side of the raw material liquid chamber 20, and the other drawing liquid chamber 30 and the other water purifying chamber 40 are located at the other side of the raw material liquid chamber 20. The filter area is increased, so that the filter efficiency is increased.
As shown in fig. 4, when the number of the drawing liquid chamber 30 and the water purifying chamber 40 is one, the drawing liquid chamber 30 and the water purifying chamber 40 are located on the same side of the raw material liquid chamber 20, and the raw material liquid chamber wall 42 is on the other side of the raw material liquid chamber 20.
The emergency water bag can be adhered to clothes and used for filtering by collecting sweat.
In a preferred embodiment of the present invention, as shown in fig. 3, a first supporting portion 21 is further disposed in the raw material liquid chamber 20, and the first supporting portion 21 plays a certain role in supporting the emergency water bag. The raw material liquid cavity 20 is divided into a first raw material liquid cavity 22 and a second raw material liquid cavity 23 by the supporting part, a plurality of through dense-mesh holes are formed in the first supporting part 21, and the first raw material liquid cavity 22 and the second raw material liquid cavity 23 are mutually communicated through the dense-mesh holes.
In a preferred embodiment of the present invention, as shown in fig. 3, the dense pore portion is a primary filtration membrane, for example, a microfiltration membrane, and the raw material liquid can be subjected to primary filtration, so that the pollution of the raw material liquid to the forward osmosis membrane is reduced, and the service life is prolonged.
Examples
The present invention will be described in further detail with reference to examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the following examples, each raw material component was a commercially available product unless otherwise specified.
Example 1
17 parts of polyester and 2.5 parts of polyvinylpyrrolidone are dissolved in 83 parts of chloroform, stirred for 3 hours at room temperature, placed in an ultrasonic cleaner, subjected to ultrasonic vibration for 20 minutes, and subjected to electrostatic spinning by using a needle head with the thickness of 0.6mm, the voltage of 19KV, the temperature of 25 ℃ and the spinning speed of 0.1mm/min under the condition that the environmental humidity is 50%, and using an aluminum foil as a receiver, so that an intermediate water outlet layer with the thickness of about 40 mu m is prepared. The aluminum foil was then transferred to a vacuum oven and dried at 25 ℃ for 15h.
100 parts of N-methylpyrrolidone, 16 parts of polysulfone and 3 parts of polyvinylpyrrolidone are added, stirring is carried out for 8 hours, after the temperature is raised to 60 ℃, light yellow uniform transparent casting solution is obtained, after the defoaming of the casting solution is carried out, the casting solution is uniformly coated on one side of a middle water outlet layer, the coating thickness of the casting solution is controlled to be 40 mu m, and then the casting solution is soaked in water to form a first supporting layer.
100 parts of N-methylpyrrolidone, 16 parts of polysulfone and 3 parts of polyvinylpyrrolidone are added, stirring is carried out for 8 hours, after the temperature is raised to 60 ℃, light yellow uniform transparent casting solution is obtained, after the defoaming of the casting solution is carried out, the casting solution is uniformly coated on the other side of the middle water outlet layer, the coating thickness of the casting solution is controlled to be 40 mu m, and then the casting solution is soaked in water, so that a second supporting layer is formed.
The film after forming the first and second support layers was immersed in a solution comprising 100 parts of water, 2 parts of anhydrous piperazine and 6 parts of polyvinylpyrrolidone for 1.5min, the surface of the film was air-dried after the film was taken out, and then immersed in a solution comprising 100 parts of n-hexane and 0.1 part of trimesic acid chloride, reacted at 15 ℃ for 1.5min, the forward osmosis film forming the first and second active layers was taken out and dried, the thickness of the first and second active layers was 4 μm, and the average pore diameter was 15nm.
After finishing, preparing the emergency water bag shown in fig. 2-3.
Using 4 mol.L -1 NaCl is used as a drawing liquid, seawater is used as a raw material liquid, and the water yield of the middle water outlet layer is measured to be 4.4L.m -2 。
Example 2
17 parts of polyester and 2.5 parts of polyvinylpyrrolidone are dissolved in 83 parts of chloroform, stirred for 3 hours at room temperature, placed in an ultrasonic cleaner, subjected to ultrasonic vibration for 20 minutes, and subjected to electrostatic spinning by using a needle head with the thickness of 0.6mm, the voltage of 19KV, the temperature of 25 ℃ and the spinning speed of 0.1mm/min under the condition that the environmental humidity is 50%, and using an aluminum foil as a receiver, so that an intermediate water outlet layer with the thickness of about 40 mu m is prepared. The aluminum foil was then transferred to a vacuum oven and dried at 25 ℃ for 15h.
100 parts of N-methylpyrrolidone, 16 parts of polysulfone and 3 parts of polyvinylpyrrolidone are added, stirring is carried out for 8 hours, after the temperature is raised to 60 ℃, light yellow uniform transparent casting solution is obtained, after the casting solution is defoamed, the casting solution is uniformly coated on one side of a middle water outlet layer, the coating thickness of the casting solution is controlled to be 20 mu m, and then the casting solution is soaked in water to form a first supporting layer.
100 parts of N-methylpyrrolidone, 16 parts of polysulfone and 3 parts of polyvinylpyrrolidone are added, stirring is carried out for 8 hours, after the temperature is raised to 60 ℃, light yellow uniform transparent casting solution is obtained, after the defoaming of the casting solution is carried out, the casting solution is uniformly coated on the other side of the middle water outlet layer, the coating thickness of the casting solution is controlled to be 20 mu m, and then the casting solution is soaked in water, so that a second supporting layer is formed.
The film after forming the first and second support layers was immersed in a solution comprising 100 parts of water, 2 parts of anhydrous piperazine and 6 parts of polyvinylpyrrolidone for 1.5min, the surface of the film was air-dried after the film was taken out, and then immersed in a solution comprising 100 parts of n-hexane and 0.1 part of trimesic acid chloride, reacted at 15 ℃ for 1.5min, the forward osmosis film forming the first and second active layers was taken out and dried, the thickness of the first and second active layers was 4 μm, and the average pore diameter was 15nm.
After finishing, preparing the emergency water bag shown in fig. 2-3.
Using 4 mol.L -1 NaCl is used as a drawing liquid, seawater is used as a raw material liquid, and the water yield of the middle water outlet layer is measured to be 4.6L.m -2 。
Example 3
17 parts of polyester and 2.5 parts of polyvinylpyrrolidone are dissolved in 83 parts of chloroform, stirred for 3 hours at room temperature, placed in an ultrasonic cleaner, subjected to ultrasonic vibration for 20 minutes, and subjected to electrostatic spinning by using a needle head with the thickness of 0.6mm, the voltage of 19KV, the temperature of 25 ℃ and the spinning speed of 0.1mm/min under the condition that the environmental humidity is 50%, and using an aluminum foil as a receiver, so that an intermediate water outlet layer with the thickness of about 60 mu m is prepared. The aluminum foil was then transferred to a vacuum oven and dried at 25 ℃ for 15h.
100 parts of N-methylpyrrolidone, 16 parts of polysulfone and 3 parts of polyvinylpyrrolidone are added, stirring is carried out for 8 h, after the temperature is raised to 60 ℃, light yellow uniform transparent casting solution is obtained, after the casting solution is defoamed, the casting solution is uniformly coated on one side of a middle water outlet layer, the coating thickness of the casting solution is controlled to be 40 mu m, and then the casting solution is soaked in water to form a first supporting layer.
100 parts of N-methylpyrrolidone, 16 parts of polysulfone and 3 parts of polyvinylpyrrolidone are added, stirring is carried out for 8 h, after the temperature is raised to 60 ℃, light yellow uniform transparent casting solution is obtained, after the casting solution is defoamed, the casting solution is uniformly coated on the other side of the middle water outlet layer, the coating thickness of the casting solution is controlled to be 40 mu m, and then the casting solution is soaked in water to form a second supporting layer.
The film after forming the first and second support layers was immersed in a solution comprising 100 parts of water, 2 parts of anhydrous piperazine and 6 parts of polyvinylpyrrolidone for 1.5min, the surface of the film was air-dried after the film was taken out, and then immersed in a solution comprising 100 parts of n-hexane and 0.1 part of trimesic acid chloride, reacted at 15 ℃ for 1.5min, the forward osmosis film forming the first and second active layers was taken out and dried, the thickness of the first and second active layers was 4 μm, and the average pore diameter was 15nm.
After finishing, preparing the emergency water bag shown in fig. 2-3.
Using 4 mol.L -1 NaCl is used as a drawing liquid, seawater is used as a raw material liquid, and the water yield of the middle water outlet layer is measured to be 3.5 L.m -2 。
Example 4
17 parts of polyester and 2.5 parts of polyvinylpyrrolidone are dissolved in 83 parts of chloroform, stirred for 3 hours at room temperature, placed in an ultrasonic cleaner, subjected to ultrasonic vibration for 20 minutes, and subjected to electrostatic spinning by using a needle head with the thickness of 0.6mm, the voltage of 19KV, the temperature of 25 ℃ and the spinning speed of 0.1mm/min under the condition that the environmental humidity is 50%, and using an aluminum foil as a receiver, so that an intermediate water outlet layer with the thickness of 46 mu m is prepared. The aluminum foil was then transferred to a vacuum oven and dried at 25 ℃ for 15h.
100 parts of N-methylpyrrolidone, 16 parts of polysulfone and 3 parts of polyvinylpyrrolidone are added, stirring is carried out for 8 h, after the temperature is raised to 60 ℃, light yellow uniform transparent casting solution is obtained, after the casting solution is defoamed, the casting solution is uniformly coated on one side of a middle water outlet layer, the coating thickness of the casting solution is controlled to be 40 mu m, and then the casting solution is soaked in water to form a first supporting layer.
100 parts of N-methylpyrrolidone, 16 parts of polysulfone and 3 parts of polyvinylpyrrolidone are added, stirring is carried out for 8 h, after the temperature is raised to 60 ℃, light yellow uniform transparent casting solution is obtained, after the casting solution is defoamed, the casting solution is uniformly coated on the other side of the middle water outlet layer, the coating thickness of the casting solution is controlled to be 30 mu m, and then the casting solution is soaked in water to form a second supporting layer.
The film after forming the first and second support layers was immersed in a solution comprising 100 parts of water, 2 parts of anhydrous piperazine and 6 parts of polyvinylpyrrolidone for 1.5min, the surface of the film was air-dried after the film was taken out, and then immersed in a solution comprising 100 parts of n-hexane and 0.1 part of trimesic acid chloride, reacted at 15 ℃ for 1.5min, the forward osmosis film forming the first and second active layers was taken out and dried, the thickness of the first and second active layers was 4 μm, and the average pore diameter was 15nm.
After finishing, preparing the emergency water bag shown in fig. 2-3.
Using 4 mol.L -1 NaCl is used as a drawing liquid, seawater is used as a raw material liquid, and the water yield of the middle water outlet layer is measured to be 5.1 L.m -2 。
Example 5
17 parts of polyester and 2.5 parts of polyvinylpyrrolidone are dissolved in 83 parts of chloroform, stirred for 3 hours at room temperature, placed in an ultrasonic cleaner, subjected to ultrasonic vibration for 20 minutes, and subjected to electrostatic spinning by using a needle head with the thickness of 0.6mm, the voltage of 19KV, the temperature of 25 ℃ and the spinning speed of 0.1mm/min under the condition that the environmental humidity is 50%, and using an aluminum foil as a receiver, so that an intermediate water outlet layer with the thickness of about 50 mu m is prepared. The aluminum foil was then transferred to a vacuum oven and dried at 25 ℃ for 15h.
100 parts of N-methylpyrrolidone, 16 parts of polysulfone and 3 parts of polyvinylpyrrolidone are added, stirring is carried out for 8 h, after the temperature is raised to 60 ℃, light yellow uniform transparent casting solution is obtained, after the casting solution is defoamed, the casting solution is uniformly coated on one side of a middle water outlet layer, the coating thickness of the casting solution is controlled to be 30 mu m, and then the casting solution is soaked in water to form a first supporting layer.
100 parts of N-methylpyrrolidone, 16 parts of polysulfone and 3 parts of polyvinylpyrrolidone are added, stirring is carried out for 8 h, after the temperature is raised to 60 ℃, light yellow uniform transparent casting solution is obtained, after the casting solution is defoamed, the casting solution is uniformly coated on the other side of the middle water outlet layer, the coating thickness of the casting solution is controlled to be 30 mu m, and then the casting solution is soaked in water to form a second supporting layer.
The film after forming the first and second support layers was immersed in a solution comprising 100 parts of water, 2 parts of anhydrous piperazine and 6 parts of polyvinylpyrrolidone for 1.5min, the surface of the film was air-dried after the film was taken out, and then immersed in a solution comprising 100 parts of n-hexane and 0.1 part of trimesic acid chloride, reacted at 15 ℃ for 1.5min, the forward osmosis film forming the first and second active layers was taken out and dried, the thickness of the first and second active layers was 4 μm, and the average pore diameter was 15nm.
After finishing, preparing the emergency water bag shown in fig. 2-3.
Using 4 mol.L -1 NaCl is used as a drawing liquid, seawater is used as a raw material liquid, and the water yield of the middle water outlet layer is measured to be 5.5 L.m -2 ·h -1 。
Example 6
17 parts of polyester and 2.5 parts of polyvinylpyrrolidone are dissolved in 83 parts of chloroform, stirred for 3 hours at room temperature, placed in an ultrasonic cleaner, subjected to ultrasonic vibration for 20 minutes, and subjected to electrostatic spinning by using a needle head with the thickness of 0.6mm, the voltage of 19KV, the temperature of 25 ℃ and the spinning speed of 0.1mm/min under the condition that the environmental humidity is 50%, and using an aluminum foil as a receiver, so that an intermediate water outlet layer with the thickness of about 50 mu m is prepared. The aluminum foil was then transferred to a vacuum oven and dried at 25 ℃ for 15h.
100 parts of N-methylpyrrolidone, 16 parts of polysulfone and 3 parts of polyvinylpyrrolidone are added, stirring is carried out for 8 hours, after the temperature is raised to 60 ℃, light yellow uniform transparent casting solution is obtained, after the defoaming of the casting solution is carried out, the casting solution is uniformly coated on one side of a middle water outlet layer, the coating thickness of the casting solution is controlled to be 40 mu m, and then the casting solution is soaked in water to form a first supporting layer.
100 parts of N-methylpyrrolidone, 16 parts of polysulfone and 3 parts of polyvinylpyrrolidone are added, stirring is carried out for 8h, after the temperature is raised to 60 ℃, light yellow uniform transparent casting solution is obtained, after the casting solution is defoamed, the casting solution is uniformly coated on the other side of the middle water outlet layer, the coating thickness of the casting solution is controlled to be 30 mu m, and then the casting solution is soaked in water to form a second supporting layer.
The film after forming the first and second support layers was immersed in a solution comprising 100 parts of water, 2 parts of anhydrous piperazine and 6 parts of polyvinylpyrrolidone for 1.5min, the surface of the film was air-dried after the film was taken out, and then immersed in a solution comprising 100 parts of n-hexane and 0.1 part of trimesic acid chloride, reacted at 15 ℃ for 1.5min, the forward osmosis film forming the first and second active layers was taken out and dried, the thickness of the first and second active layers was 4 μm, and the average pore diameter was 15nm.
After finishing, preparing the emergency water bag shown in fig. 2-3.
Using 4 mol.L -1 NaCl is used as a drawing liquid, water is used as a raw material liquid, and the water yield of the middle water outlet layer is measured to be 5.3 L.m -2 。
Example 7
17 parts of polyester and 2.5 parts of polyvinylpyrrolidone are dissolved in 83 parts of chloroform, stirred for 3 hours at room temperature, placed in an ultrasonic cleaner, subjected to ultrasonic vibration for 20 minutes, and subjected to electrostatic spinning by using a needle head with the thickness of 0.6mm, the voltage of 19KV, the temperature of 25 ℃ and the spinning speed of 0.1mm/min under the condition that the environmental humidity is 50%, and using an aluminum foil as a receiver, so that an intermediate water outlet layer with the thickness of about 50 mu m is prepared. The aluminum foil was then transferred to a vacuum oven and dried at 25 ℃ for 15h.
100 parts of N-methylpyrrolidone, 16 parts of polysulfone and 3 parts of polyvinylpyrrolidone are added, stirring is carried out for 8 h, after the temperature is raised to 60 ℃, light yellow uniform transparent casting solution is obtained, after the casting solution is defoamed, the casting solution is uniformly coated on one side of a middle water outlet layer, the coating thickness of the casting solution is controlled to be 30 mu m, and then the casting solution is soaked in water to form a first supporting layer.
100 parts of N-methylpyrrolidone, 16 parts of polysulfone and 3 parts of polyvinylpyrrolidone are added, stirring is carried out for 8 h, after the temperature is raised to 60 ℃, light yellow uniform transparent casting solution is obtained, after the casting solution is defoamed, the casting solution is uniformly coated on the other side of the middle water outlet layer, the coating thickness of the casting solution is controlled to be 40 mu m, and then the casting solution is soaked in water to form a second supporting layer.
The film after forming the first and second support layers was immersed in a solution comprising 100 parts of water, 2 parts of anhydrous piperazine and 6 parts of polyvinylpyrrolidone for 1.5min, the surface of the film was air-dried after the film was taken out, and then immersed in a solution comprising 100 parts of n-hexane and 0.1 part of trimesic acid chloride, reacted at 15 ℃ for 1.5min, the forward osmosis film forming the first and second active layers was taken out and dried, the thickness of the first and second active layers was 4 μm, and the average pore diameter was 15nm.
After finishing, preparing the emergency water bag shown in fig. 2-3.
Using 4 mol.L -1 NaCl is used as a drawing liquid, water is used as a raw material liquid, and the water yield of the middle water outlet layer is measured to be 4.9L.m -2 。
Example 8
17 parts of polyester and 2.5 parts of polyvinylpyrrolidone are dissolved in 83 parts of chloroform, stirred for 3 hours at room temperature, placed in an ultrasonic cleaner, subjected to ultrasonic vibration for 20 minutes, and subjected to electrostatic spinning by using a needle head with the thickness of 0.6mm, the voltage of 19KV, the temperature of 25 ℃ and the spinning speed of 0.1mm/min under the condition that the environmental humidity is 50%, and using an aluminum foil as a receiver, so that an intermediate water outlet layer with the thickness of about 50 mu m is prepared. The aluminum foil was then transferred to a vacuum oven and dried at 25 ℃ for 15h.
100 parts of N-methylpyrrolidone, 16 parts of polysulfone and 3 parts of polyvinylpyrrolidone are added, stirring is carried out for 8 h, after the temperature is raised to 60 ℃, light yellow uniform transparent casting solution is obtained, after the casting solution is defoamed, the casting solution is uniformly coated on one side of a middle water outlet layer, the coating thickness of the casting solution is controlled to be 40 mu m, and then the casting solution is soaked in water to form a first supporting layer.
100 parts of N-methylpyrrolidone, 16 parts of polysulfone and 3 parts of polyvinylpyrrolidone are added, stirring is carried out for 8 h, after the temperature is raised to 60 ℃, light yellow uniform transparent casting solution is obtained, after the casting solution is defoamed, the casting solution is uniformly coated on the other side of the middle water outlet layer, the coating thickness of the casting solution is controlled to be 40 mu m, and then the casting solution is soaked in water to form a second supporting layer.
The film after forming the first and second support layers was immersed in a solution comprising 100 parts of water, 2 parts of anhydrous piperazine and 6 parts of polyvinylpyrrolidone for 1.5min, the surface of the film was air-dried after the film was taken out, and then immersed in a solution comprising 100 parts of n-hexane and 0.1 part of trimesic acid chloride, reacted at 15 ℃ for 1.5min, the forward osmosis film forming the first and second active layers was taken out and dried, the thickness of the first and second active layers was 4 μm, and the average pore diameter was 15nm.
After finishing, preparing the emergency water bag shown in fig. 2-3.
Using 4 mol.L -1 NaCl is used as a drawing liquid, seawater is used as a raw material liquid, and the water yield of the middle water outlet layer is measured to be 4.8L.m -2 。
Example 9
15 parts of polyester is dissolved in 85 parts of chloroform, stirred for 3 hours at room temperature, placed in an ultrasonic cleaner, subjected to ultrasonic vibration for 20 minutes, subjected to electrostatic spinning by using an aluminum foil as a receiver under the conditions of voltage of 19KV, temperature of 25 ℃, spinning speed of 0.1mm/min and environmental humidity of 50%, and prepared into an intermediate water outlet layer with the thickness of about 50 mu m. The aluminum foil was then transferred to a vacuum oven and dried at 25 ℃ for 15h.
100 parts of N-methylpyrrolidone, 16 parts of polysulfone and 3 parts of polyvinylpyrrolidone are added, stirring is carried out for 8 h, after the temperature is raised to 60 ℃, light yellow uniform transparent casting solution is obtained, after the casting solution is defoamed, the casting solution is uniformly coated on one side of a middle water outlet layer, the coating thickness of the casting solution is controlled to be 30 mu m, and then the casting solution is soaked in water to form a first supporting layer.
100 parts of N-methylpyrrolidone, 16 parts of polysulfone and 3 parts of polyvinylpyrrolidone are added, stirring is carried out for 8 h, after the temperature is raised to 60 ℃, light yellow uniform transparent casting solution is obtained, after the casting solution is defoamed, the casting solution is uniformly coated on the other side of the middle water outlet layer, the coating thickness of the casting solution is controlled to be 30 mu m, and then the casting solution is soaked in water to form a second supporting layer.
The film after forming the first and second support layers was immersed in a solution comprising 100 parts of water, 2 parts of anhydrous piperazine and 6 parts of polyvinylpyrrolidone for 1.5min, the surface of the film was air-dried after the film was taken out, and then immersed in a solution comprising 100 parts of n-hexane and 0.1 part of trimesic acid chloride, reacted at 15 ℃ for 1.5min, the forward osmosis film forming the first and second active layers was taken out and dried, the thickness of the first and second active layers was 4 μm, and the average pore diameter was 15nm.
After finishing, preparing the emergency water bag shown in fig. 2-3.
Using 4 mol.L -1 NaCl is used as a drawing liquid, water is used as a raw material liquid, and the water yield of the middle water outlet layer is measured to be 3.8L.m -2 ·h -1 。
Comparative example 1
15 parts of polyester is dissolved in 85 parts of chloroform, stirred for 3 hours at room temperature, placed in an ultrasonic cleaner, subjected to ultrasonic vibration for 20 minutes, subjected to electrostatic spinning by using an aluminum foil as a receiver under the conditions of voltage of 19KV, temperature of 25 ℃, spinning speed of 0.1mm/min and environmental humidity of 50%, and prepared into an intermediate water outlet layer with thickness of about 70 mu m. The aluminum foil was then transferred to a vacuum oven and dried at 25 ℃ for 15h.
100 parts of N-methylpyrrolidone, 16 parts of polysulfone and 3 parts of polyvinylpyrrolidone are added, stirring is carried out for 8 h, after the temperature is raised to 60 ℃, light yellow uniform transparent casting solution is obtained, after the casting solution is defoamed, the casting solution is uniformly coated on one side of a middle water outlet layer, the coating thickness of the casting solution is controlled to be 30 mu m, and then the casting solution is soaked in water to form a first supporting layer.
100 parts of N-methylpyrrolidone, 16 parts of polysulfone and 3 parts of polyvinylpyrrolidone are added, stirring is carried out for 8 h, after the temperature is raised to 60 ℃, light yellow uniform transparent casting solution is obtained, after the casting solution is defoamed, the casting solution is uniformly coated on the other side of the middle water outlet layer, the coating thickness of the casting solution is controlled to be 30 mu m, and then the casting solution is soaked in water to form a second supporting layer.
The film after forming the first and second support layers was immersed in a solution comprising 100 parts of water, 2 parts of anhydrous piperazine and 6 parts of polyvinylpyrrolidone for 1.5min, the surface of the film was air-dried after the film was taken out, and then immersed in a solution comprising 100 parts of n-hexane and 0.1 part of trimesic acid chloride, reacted at 15 ℃ for 1.5min, the forward osmosis film forming the first and second active layers was taken out and dried, the thickness of the first and second active layers was 4 μm, and the average pore diameter was 15nm.
After finishing, preparing the emergency water bag shown in fig. 2-3.
Using 4 mol.L -1 NaCl is used as a drawing liquid, seawater is used as a raw material liquid, and the water yield of the middle water outlet layer is measured to be 0.5 L.m -2 。
Comparative example 2
15 parts of polyester is dissolved in 85 parts of chloroform, stirred for 3 hours at room temperature, placed in an ultrasonic cleaner, subjected to ultrasonic vibration for 20 minutes, subjected to electrostatic spinning by using an aluminum foil as a receiver under the conditions of voltage of 19KV, temperature of 25 ℃, spinning speed of 0.1mm/min and environmental humidity of 50%, and prepared into an intermediate water outlet layer with thickness of about 30 mu m. The aluminum foil was then transferred to a vacuum oven and dried at 25 ℃ for 15h.
100 parts of N-methylpyrrolidone, 16 parts of polysulfone and 3 parts of polyvinylpyrrolidone are added, stirring is carried out for 8 h, after the temperature is raised to 60 ℃, light yellow uniform transparent casting solution is obtained, after the casting solution is defoamed, the casting solution is uniformly coated on one side of a middle water outlet layer, the coating thickness of the casting solution is controlled to be 30 mu m, and then the casting solution is soaked in water to form a first supporting layer.
100 parts of N-methylpyrrolidone, 16 parts of polysulfone and 3 parts of polyvinylpyrrolidone are added, stirring is carried out for 8 hours, after the temperature is raised to 60 ℃, light yellow uniform transparent casting solution is obtained, after the defoaming of the casting solution is carried out, the casting solution is uniformly coated on the other side of the middle water outlet layer, the coating thickness of the casting solution is controlled to be 30 mu m, and then the casting solution is soaked in water, so that a second supporting layer is formed.
The film after forming the first and second support layers was immersed in a solution comprising 100 parts of water, 2 parts of anhydrous piperazine and 6 parts of polyvinylpyrrolidone for 1.5min, the surface of the film was air-dried after the film was taken out, and then immersed in a solution comprising 100 parts of n-hexane and 0.1 part of trimesic acid chloride, reacted at 15 ℃ for 1.5min, the forward osmosis film forming the first and second active layers was taken out and dried, the thickness of the first and second active layers was 4 μm, and the average pore diameter was 15nm.
After finishing, preparing the emergency water bag shown in fig. 2-3.
Using 4 mol.L -1 NaCl is used as a drawing liquid, seawater is used as a raw material liquid, and the water yield of the middle water outlet layer is measured to be 0.9L.m -2 。
Claims (7)
1. A forward osmosis membrane applied to emergency water treatment, characterized in that the forward osmosis membrane comprises a first active layer (11), a first support layer (12), a middle water outlet layer (13), a second support layer (14) and a second active layer (15) which are sequentially arranged along the water permeation direction, wherein the forward osmosis membrane can be used for discharging water from the middle water outlet layer (13) on the circumferential side edge;
The middle water outlet layer (13) comprises a reticular textile layer made of polyester or polycaprolactone, and the thickness of the middle water outlet layer (13) is 40-60 mu m;
the first active layer (11) and the second active layer (15) are polyamide layers, and the first support layer (12) and the second support layer (14) are respectively and independently polysulfone layers or polyether sulfone layers;
the intermediate water outlet layer (13) comprises blending modification of polyester or polycaprolactone with a first polymer;
the middle water outlet layer (13) is a nanofiber reticular textile layer formed by adopting an electrostatic spinning method;
the first support layer (12) is blend modified with a second polymer, and the second support layer (14) is blend modified with a third polymer;
the thickness of the first supporting layer (12) is 20-40 mu m, and the thickness of the second supporting layer (14) is 20-40 mu m;
the first polymer comprises one or more of polyacrylamide, polyvinyl alcohol or polyvinylpyrrolidone;
the second polymer and the third polymer each independently comprise one or more of polyacrylamide, polyvinyl alcohol or polyvinylpyrrolidone;
the first supporting layer (12) and the second supporting layer (14) are coated on two sides of the middle water outlet layer (13) step by step.
2. The forward osmosis membrane according to claim 1, characterized in that the thickness of the first active layer (11) and the second active layer is 2-8 μm, the pore diameter of the first active layer (11) and the second active layer (15) is 3-25 nm, and the first active layer (11) and the second active layer (15) are polyamide layers having a regular stripe structure.
3. A method of producing the forward osmosis membrane according to claim 1 or 2, comprising: first, a middle water outlet layer is formed, then a first support layer and a second support layer are formed on two sides of the middle water outlet layer, and then a first active layer is formed on the first support layer and a second active layer is formed on the second support layer at the same time.
4. The method of claim 3, wherein the intermediate water outlet layer is formed by electrospinning;
the method for forming the intermediate water outlet layer by adopting the electrostatic spinning method comprises the following steps:
firstly, dissolving polyester or polycaprolactone in a polar solvent to prepare a spinning solution, after defoaming, carrying out electrostatic spinning on the spinning solution to form a nanofiber reticular spinning layer, and then drying.
5. Use of a forward osmosis membrane according to claim 1 or 2 for emergency water bags.
6. Use of the forward osmosis membrane according to claim 5 for an emergency water bag, wherein the emergency water bag comprises:
a raw material liquid cavity (20) arranged on one side of a first active layer (11) of the forward osmosis membrane (10), wherein the periphery of the cavity wall of the raw material liquid cavity (20) away from the middle part on one side of the first active layer is bonded, and a first liquid inlet (24) is arranged on the raw material liquid cavity (20);
the liquid sucking cavity (30) is arranged on one side of the second active layer (15) of the forward osmosis membrane (10), the cavity wall of the liquid sucking cavity (30) is bonded with the periphery of one side of the second active layer, which is far away from the middle part, and a second liquid inlet (31) is formed in the liquid sucking cavity (30);
the raw material liquid cavity (20) and the drawing liquid cavity (30) are communicated through the middle part of the forward osmosis membrane (10);
the water purifying cavity (40) is arranged around the raw material liquid cavity (20) and the drawing liquid cavity (30), the circumferential side edge part of the forward osmosis membrane (10) is arranged in the water purifying cavity (40), and a first water outlet (41) is arranged on the water purifying cavity (40).
7. The application of the forward osmosis membrane for the emergency water bag according to claim 6, wherein the interior of the raw material liquid cavity (20) is further provided with a first supporting part (21), and the first supporting part (21) is provided with through dense holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310658615.2A CN116392972B (en) | 2023-06-06 | 2023-06-06 | Forward osmosis membrane applied to emergency water treatment, preparation method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310658615.2A CN116392972B (en) | 2023-06-06 | 2023-06-06 | Forward osmosis membrane applied to emergency water treatment, preparation method and application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116392972A CN116392972A (en) | 2023-07-07 |
| CN116392972B true CN116392972B (en) | 2023-08-08 |
Family
ID=87016432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310658615.2A Active CN116392972B (en) | 2023-06-06 | 2023-06-06 | Forward osmosis membrane applied to emergency water treatment, preparation method and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116392972B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103055713A (en) * | 2012-12-28 | 2013-04-24 | 中国海洋大学 | Double layered forward osmosis membrane and preparation method thereof |
| CN103537200A (en) * | 2013-10-25 | 2014-01-29 | 华南理工大学 | Cellulose acetate forward osmotic membrane and preparation method thereof |
| CN105617885A (en) * | 2016-03-25 | 2016-06-01 | 北京碧水源膜科技有限公司 | Device and method for continuously preparing forward osmosis composite membrane |
| WO2017094473A1 (en) * | 2015-11-30 | 2017-06-08 | 帝人株式会社 | Method for manufacturing composite film |
| CN109276998A (en) * | 2018-08-28 | 2019-01-29 | 中国科学院宁波材料技术与工程研究所 | A kind of high-performance Janus forward osmosis membrane and preparation method thereof |
| WO2020241860A1 (en) * | 2019-05-31 | 2020-12-03 | 旭化成株式会社 | Forward osmosis membrane, forward osmosis membrane module, and manufacturing method thereof |
| CN114307646A (en) * | 2021-12-31 | 2022-04-12 | 北京建筑大学 | Preparation method of high-water-flux composite forward osmosis membrane beneficial to permeation of driving agent |
-
2023
- 2023-06-06 CN CN202310658615.2A patent/CN116392972B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103055713A (en) * | 2012-12-28 | 2013-04-24 | 中国海洋大学 | Double layered forward osmosis membrane and preparation method thereof |
| CN103537200A (en) * | 2013-10-25 | 2014-01-29 | 华南理工大学 | Cellulose acetate forward osmotic membrane and preparation method thereof |
| WO2017094473A1 (en) * | 2015-11-30 | 2017-06-08 | 帝人株式会社 | Method for manufacturing composite film |
| CN105617885A (en) * | 2016-03-25 | 2016-06-01 | 北京碧水源膜科技有限公司 | Device and method for continuously preparing forward osmosis composite membrane |
| CN109276998A (en) * | 2018-08-28 | 2019-01-29 | 中国科学院宁波材料技术与工程研究所 | A kind of high-performance Janus forward osmosis membrane and preparation method thereof |
| WO2020241860A1 (en) * | 2019-05-31 | 2020-12-03 | 旭化成株式会社 | Forward osmosis membrane, forward osmosis membrane module, and manufacturing method thereof |
| CN114307646A (en) * | 2021-12-31 | 2022-04-12 | 北京建筑大学 | Preparation method of high-water-flux composite forward osmosis membrane beneficial to permeation of driving agent |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116392972A (en) | 2023-07-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Ladewig et al. | Fundamentals of membrane processes | |
| EP2859939B1 (en) | Reverse osmosis membrane with high permeation flux comprising surface-treated zeolite, and method for preparing same | |
| CN104548952B (en) | A kind of preparation method of antibacterial composite nanometer filtering film | |
| CN104874304A (en) | Composite Porous Polymeric Membrane With High Void Volume | |
| Kumarage et al. | A comprehensive review on electrospun nanohybrid membranes for wastewater treatment | |
| KR101757859B1 (en) | Dual-layer hollow fiber membrane containing nanoparticles and manufacturing method thereof | |
| Cheng et al. | Electrospun nanofibers for water treatment | |
| KR101972172B1 (en) | Polyamide composite membrane having high quality and manufacturing method thereof | |
| Tang et al. | Leaf vein-inspired microfiltration membrane based on ultrathin nanonetworks | |
| KR102211659B1 (en) | Good with Antiviral and antibacterial Filter cartridgeand method of manufacturing them | |
| CN116392972B (en) | Forward osmosis membrane applied to emergency water treatment, preparation method and application | |
| KR20160121987A (en) | Monomer Limited Interfacial Polymerization Method and Separation Membrane Prepared by the Same | |
| TWI321487B (en) | ||
| JP2009011913A (en) | Membrane separation method and membrane separation apparatus | |
| JP5120006B2 (en) | Manufacturing method of composite semipermeable membrane | |
| Ran et al. | Polyethersulfone fiber | |
| KR101537446B1 (en) | Porous complex media, method of Porous complex media and Filter cartridge using that | |
| KR101946983B1 (en) | Method for manufacturing water-treatment membrane, water-treatment membrane manufactured by thereof, and water treatment module comprising membrane | |
| KR101611675B1 (en) | Positive electric charge- filter cartridge and Preparing method thereof | |
| KR101511232B1 (en) | Forward Osmosis membrane packed with draw material, the preparing method thereof and the forward osmosis apparatus comprising the same | |
| KR20180038695A (en) | Positive electric charge-media for water stream type water purifier, Manufacturing method of the same and Filter cartridge for water stream type water purifier containing the same | |
| US20240058754A1 (en) | Super-high-permeance thin-film composite nanofiltration membrane incorporating silk nanofiber interlayer | |
| KR101611676B1 (en) | Positive electric charge- filter cartridge and Preparing method thereof | |
| Merati et al. | Electrospun Nanofibers for Water Purification | |
| KR20180040962A (en) | Composition for preparing reverse osmosis membrane, method for preparing reverse osmosis membrane using the same, and reverse osmosis membrane and water treatment module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |