CN109675447A - A kind of enhancement type hollow fiber film and preparation method thereof for being not easy to strip off - Google Patents
A kind of enhancement type hollow fiber film and preparation method thereof for being not easy to strip off Download PDFInfo
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- CN109675447A CN109675447A CN201910004271.7A CN201910004271A CN109675447A CN 109675447 A CN109675447 A CN 109675447A CN 201910004271 A CN201910004271 A CN 201910004271A CN 109675447 A CN109675447 A CN 109675447A
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- easy
- hollow fiber
- enhancement type
- fiber film
- type hollow
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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
- B01D71/30—Polyalkenyl halides
- B01D71/32—Polyalkenyl halides containing fluorine atoms
- B01D71/34—Polyvinylidene fluoride
-
- 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
- B01D69/08—Hollow fibre membranes
Abstract
The invention discloses a kind of enhancement type hollow fiber film for being not easy to strip off, the casting solution by hollow internal lining pipe and on the outer surface coated on hollow internal lining pipe is prepared；The casting solution includes following component by weight: 8-45 parts of Kynoar, 1-12 parts of polyethylene glycol, 0.3-6 parts of Inorganic pore forming agents, 0.2-2 parts of adhesion promoter, 35-87 parts of solvent.The invention also discloses a kind of preparation methods of enhancement type hollow fiber film for being not easy to strip off.Hollow-fibre membrane of the invention has the characteristics that bonding force is good, high pressure backwash is not easy to strip off, easy cleaning, intensity are high, permeation flux is high, interception capacity is good, long service life and use cost are low.
Description
Technical field
The present invention relates to a kind of hollow-fibre membranes, and in particular to a kind of enhancement type hollow fiber film for being not easy to strip off and its system
Preparation Method.
Background technique
Membrane bioreactor (MBR) technology is the novel water treatment technology that membrane separation technique and biotechnology organically combine,
It using membrane separation plant by biochemical reaction tank activated sludge and larger molecular organics retain, save secondary settling tank.Film-life
Object reactor process enhances the function of bioreactor by the isolation technics of film significantly, mentions activated sludge concentration significantly
Height, hydraulic detention time (HRT) and sludge retention time (SRT) can be controlled separately.
Currently, the hollow-fibre membrane of embrane method processing sewage in the prior art, since fenestra is easily blocked up in sewage organic contamination,
When cleaning film, the film wire of hollow-fibre membrane is easily broken, not only influences the water quality of sewage treatment, but also needs replacing doughnut
Film improves operation cost.The case where in order to guarantee the water standard of sewage treatment and be not easy fracture of wire, big city is using enhanced
Pvdf Microporous Hollow Fiber Membrane, increase nylon internal lining pipe in enhancement type hollow fiber film film, coated in internal lining pipe appearance
The casting solution of one strata vinylidene, still there is many deficiencies: the adherency being mainly manifested between film and internal lining pipe
Power defective tightness, it is easy to fall off, since casting solution is easily stripped off with internal lining pipe, cause sewage treatment water quality is not up to standard not to be available.
Summary of the invention
For overcome the deficiencies in the prior art, one of the objects of the present invention is to provide it is a kind of be not easy to strip off it is enhanced in
Empty fiber membrane, the hollow-fibre membrane have bonding force is good, high pressure backwash is not easy to strip off, easy cleaning, intensity are high, permeation flux is high,
The feature that interception capacity is good, long service life and use cost are low.
The second object of the present invention is to provide a kind of preparation method of enhancement type hollow fiber film for being not easy to strip off.
An object of the present invention adopts the following technical scheme that realization:
A kind of enhancement type hollow fiber film for being not easy to strip off, by hollow internal lining pipe and the outer surface coated on hollow internal lining pipe
On casting solution be prepared；It is characterized in that, the casting solution includes following component by weight: Kynoar 8-
45 parts, 1-12 parts of polyethylene glycol, 0.3-6 parts of Inorganic pore forming agents, 0.2-2 parts of adhesion promoter, 35-87 parts of solvent.
Further, the Inorganic pore forming agents are aluminium oxide.
Further, the adhesion promoter is pyrrole network alkanone.
Further, the molecular weight of the pyrrole network alkanone is 3.8 × 104。
Further, the solvent is dimethyl acetamide.
Further, the molecular weight of the Kynoar is 300,000-80 ten thousand.
Further, the molecular weight of the polyethylene glycol is 200-40000.
The second object of the present invention adopts the following technical scheme that realization:
A kind of preparation method for the enhancement type hollow fiber film for being not easy to strip off characterized by comprising
Casting solution preparation step: the Kynoar of formula ratio, polyethylene glycol, Inorganic pore forming agents, solvent are added respectively
It into heatable agitating device, is stirred 40 minutes under the conditions of 25 DEG C of temperature, then is warming up to 45 DEG C and stirring 60 minutes, so
The adhesion promoter of formula ratio is added in agitating device afterwards and is stirred 4-8 hours, is finally successively cast by vacuum defoamation, filtering
Film liquid；
Forming step: casting solution is evenly applied on the outer surface of hollow internal lining pipe by spinning appts, is enhanced
Doughnut；The air gap for being 250-350mm by length by the doughnut of enhancing, is then immersed in 40 DEG C of hot water
Coagulation forming, then the immersion treatment in 25-35 DEG C of hot water obtain the enhancement type hollow fiber film for being not easy to strip off after dry.
Further, in forming step, the time of immersion treatment is 8 hours.
Further, in forming step, the length of the air gap is 300mm.
Compared with prior art, the beneficial effects of the present invention are:
Casting solution of the invention includes Kynoar, polyethylene glycol, Inorganic pore forming agents, adhesion promoter, solvent, optimizes and matches
Fang Zucheng and dosage, meanwhile, casting solution preparation step is using different temperatures and repeatedly stirring, optimization in preparation method of the invention
Processing step and parameter, so that the enhancement type hollow fiber film for being not easy to strip off that is prepared into has, bonding force is good, high pressure backwash
It is not easy the advantage stripped off, easy cleaning, intensity are high, permeation flux is high, interception capacity is good, long service life and use cost are low.
Specific embodiment
In the following, being described further in conjunction with specific embodiment to the present invention, it should be noted that is do not collided
Under the premise of, new embodiment can be formed between various embodiments described below or between each technical characteristic in any combination.This reality
Apply employed in example to material be commercially available.
A kind of enhancement type hollow fiber film for being not easy to strip off, by hollow internal lining pipe and the outer surface coated on hollow internal lining pipe
On casting solution be prepared；The casting solution includes following component by weight: 8-45 parts of Kynoar, poly- second two
1-12 parts of alcohol, 0.3-6 parts of Inorganic pore forming agents, 0.2-2 parts of adhesion promoter, 35-87 parts of solvent.
As preferred embodiment, the Inorganic pore forming agents are aluminium oxide.
As preferred embodiment, the adhesion promoter is pyrrole network alkanone.
As preferred embodiment, the molecular weight of the pyrrole network alkanone is 3.8 × 104。
As preferred embodiment, the solvent is dimethyl acetamide.
As preferred embodiment, the molecular weight of the Kynoar is 300,000-80 ten thousand.
As preferred embodiment, the molecular weight of the polyethylene glycol is 200-40000.
A kind of preparation method for the enhancement type hollow fiber film for being not easy to strip off, comprising:
Casting solution preparation step: the Kynoar of formula ratio, polyethylene glycol, Inorganic pore forming agents, solvent are added respectively
It into heatable agitating device, is stirred 40 minutes under the conditions of 25 DEG C of temperature, then is warming up to 45 DEG C and stirring 60 minutes, so
The adhesion promoter of formula ratio is added in agitating device afterwards and is stirred 4-8 hours, is finally successively cast by vacuum defoamation, filtering
Film liquid；
Forming step: casting solution is evenly applied on the outer surface of hollow internal lining pipe by spinning appts, is enhanced
Doughnut；The air gap for being 250-350mm by length by the doughnut of enhancing, is then immersed in 40 DEG C of hot water
Coagulation forming, then the immersion treatment in 25-35 DEG C of hot water obtain the enhancement type hollow fiber film for being not easy to strip off after dry.
As preferred embodiment, in forming step, the time of immersion treatment is 8 hours.
As preferred embodiment, in forming step, the length of the air gap is 300mm.
It is specific embodiment of the present invention below, used raw material, equipment etc. remove special limit in the following embodiments
It can be obtained by buying pattern outside fixed.
Embodiment 1:
A kind of enhancement type hollow fiber film for being not easy to strip off, by hollow internal lining pipe and the outer surface coated on hollow internal lining pipe
On casting solution be prepared；The casting solution includes following component by weight: 8 parts of Kynoar, polyethylene glycol 1
Part, 0.3 part of Inorganic pore forming agents, 0.2 part of adhesion promoter, 35 parts of solvent.
The Inorganic pore forming agents are aluminium oxide.The adhesion promoter is pyrrole network alkanone.The molecular weight of the pyrrole network alkanone is 3.8
×104.The solvent is dimethyl acetamide.The molecular weight of the Kynoar is 300,000.The molecule of the polyethylene glycol
Amount is 200.
A kind of preparation method for the enhancement type hollow fiber film for being not easy to strip off, comprising:
Casting solution preparation step: the Kynoar of formula ratio, polyethylene glycol, Inorganic pore forming agents, solvent are added respectively
It into heatable agitating device, is stirred 40 minutes under the conditions of 25 DEG C of temperature, then is warming up to 45 DEG C and stirring 60 minutes, so
The adhesion promoter of formula ratio is added in agitating device afterwards and is stirred 6 hours, finally successively obtains casting film by vacuum defoamation, filtering
Liquid；
Forming step: casting solution is evenly applied on the outer surface of hollow internal lining pipe by spinning appts, is enhanced
Doughnut；The air gap for being 300mm by length by the doughnut of enhancing, is then immersed in 40 DEG C of hot water and solidifies
Molding, then immersion treatment 8 hours in 30 DEG C of hot water obtain the enhancement type hollow fiber film for being not easy to strip off after dry.
Embodiment 2:
A kind of enhancement type hollow fiber film for being not easy to strip off, by hollow internal lining pipe and the outer surface coated on hollow internal lining pipe
On casting solution be prepared；The casting solution includes following component by weight: 20 parts of Kynoar, polyethylene glycol
4 parts, 2 parts of Inorganic pore forming agents, 0.5 part of adhesion promoter, 45 parts of solvent.
The Inorganic pore forming agents are aluminium oxide.The adhesion promoter is pyrrole network alkanone.The molecular weight of the pyrrole network alkanone is 3.8
×104.The solvent is dimethyl acetamide.The molecular weight of the Kynoar is 500,000.The molecule of the polyethylene glycol
Amount is 2000.
A kind of preparation method for the enhancement type hollow fiber film for being not easy to strip off, comprising:
Casting solution preparation step: the Kynoar of formula ratio, polyethylene glycol, Inorganic pore forming agents, solvent are added respectively
It into heatable agitating device, is stirred 40 minutes under the conditions of 25 DEG C of temperature, then is warming up to 45 DEG C and stirring 60 minutes, so
The adhesion promoter of formula ratio is added in agitating device afterwards and is stirred 4 hours, finally successively obtains casting film by vacuum defoamation, filtering
Liquid；
Forming step: casting solution is evenly applied on the outer surface of hollow internal lining pipe by spinning appts, is enhanced
Doughnut；The air gap for being 300mm by length by the doughnut of enhancing, is then immersed in 40 DEG C of hot water and solidifies
Molding, then immersion treatment 8 hours in 30 DEG C of hot water obtain the enhancement type hollow fiber film for being not easy to strip off after dry.
Embodiment 3:
A kind of enhancement type hollow fiber film for being not easy to strip off, by hollow internal lining pipe and the outer surface coated on hollow internal lining pipe
On casting solution be prepared；The casting solution includes following component by weight: 30 parts of Kynoar, polyethylene glycol
8 parts, 4 parts of Inorganic pore forming agents, 1.5 parts of adhesion promoter, 75 parts of solvent.
The Inorganic pore forming agents are aluminium oxide.The adhesion promoter is pyrrole network alkanone.The molecular weight of the pyrrole network alkanone is 3.8
×104.The solvent is dimethyl acetamide.The molecular weight of the Kynoar is 700,000.The molecule of the polyethylene glycol
Amount is 20000.
A kind of preparation method for the enhancement type hollow fiber film for being not easy to strip off, comprising:
Casting solution preparation step: the Kynoar of formula ratio, polyethylene glycol, Inorganic pore forming agents, solvent are added respectively
It into heatable agitating device, is stirred 40 minutes under the conditions of 25 DEG C of temperature, then is warming up to 45 DEG C and stirring 60 minutes, so
The adhesion promoter of formula ratio is added in agitating device afterwards and is stirred 7 hours, finally successively obtains casting film by vacuum defoamation, filtering
Liquid；
Forming step: casting solution is evenly applied on the outer surface of hollow internal lining pipe by spinning appts, is enhanced
Doughnut；The air gap for being 250mm by length by the doughnut of enhancing, is then immersed in 40 DEG C of hot water and solidifies
Molding, then immersion treatment 8 hours in 35 DEG C of hot water obtain the enhancement type hollow fiber film for being not easy to strip off after dry.
Embodiment 4:
A kind of enhancement type hollow fiber film for being not easy to strip off, by hollow internal lining pipe and the outer surface coated on hollow internal lining pipe
On casting solution be prepared；The casting solution includes following component by weight: 45 parts of Kynoar, polyethylene glycol
12 parts, 6 parts of Inorganic pore forming agents, 2 parts of adhesion promoter, 87 parts of solvent.
The Inorganic pore forming agents are aluminium oxide.The adhesion promoter is pyrrole network alkanone.The molecular weight of the pyrrole network alkanone is 3.8
×104.The solvent is dimethyl acetamide.The molecular weight of the Kynoar is 800,000.The molecule of the polyethylene glycol
Amount is 40000.
A kind of preparation method for the enhancement type hollow fiber film for being not easy to strip off, comprising:
Casting solution preparation step: the Kynoar of formula ratio, polyethylene glycol, Inorganic pore forming agents, solvent are added respectively
It into heatable agitating device, is stirred 40 minutes under the conditions of 25 DEG C of temperature, then is warming up to 45 DEG C and stirring 60 minutes, so
The adhesion promoter of formula ratio is added in agitating device afterwards and is stirred 8 hours, finally successively obtains casting film by vacuum defoamation, filtering
Liquid；
Forming step: casting solution is evenly applied on the outer surface of hollow internal lining pipe by spinning appts, is enhanced
Doughnut；The air gap for being 350mm by length by the doughnut of enhancing, is then immersed in 40 DEG C of hot water and solidifies
Molding, then immersion treatment 8 hours in 25 DEG C of hot water obtain the enhancement type hollow fiber film for being not easy to strip off after dry.
Performance test:
The doughnut film properties of embodiment 1-4 are tested respectively, test result is shown in Table 1:
Table 1
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Water flux | 1800L/㎡h | 1780L/㎡h | 1700L/㎡h | 1680L/㎡h |
| Average pore size | 0.01μm | 0.01μm | 0.01μm | 0.01μm |
| Rejection | 99.9% | 99.9% | 99.9% | 99.9% |
| Intensity | 410N | 410N | 410N | 410N |
| Cohesive force | 17mpa/mm2 | 17mpa/mm2 | 17mpa/mm2 | 17mpa/mm2 |
| High pressure backwash | It does not strip off | It does not strip off | It does not strip off | It does not strip off |
The above embodiment is only the preferred embodiment of the present invention, and the scope of protection of the present invention is not limited thereto,
The variation and replacement for any unsubstantiality that those skilled in the art is done on the basis of the present invention belong to institute of the present invention
Claimed range.
Claims (10)
1. a kind of enhancement type hollow fiber film for being not easy to strip off, by hollow internal lining pipe and on the outer surface coated on hollow internal lining pipe
Casting solution be prepared；It is characterized in that, the casting solution includes following component by weight: Kynoar 8-45
Part, 1-12 parts of polyethylene glycol, 0.3-6 parts of Inorganic pore forming agents, 0.2-2 parts of adhesion promoter, 35-87 parts of solvent.
2. being not easy the enhancement type hollow fiber film stripped off as described in claim 1, which is characterized in that the Inorganic pore forming agents are
Aluminium oxide.
3. being not easy the enhancement type hollow fiber film stripped off as described in claim 1, which is characterized in that the adhesion promoter is pyrrole network
Alkanone.
4. being not easy the enhancement type hollow fiber film stripped off as claimed in claim 3, which is characterized in that point of the pyrrole network alkanone
Son amount is 3.8 × 104。
5. being not easy the enhancement type hollow fiber film stripped off as described in claim 1, which is characterized in that the solvent is dimethyl
Acetamide.
6. being not easy the enhancement type hollow fiber film stripped off as described in claim 1, which is characterized in that the Kynoar
Molecular weight is 300,000-80 ten thousand.
7. being not easy the enhancement type hollow fiber film stripped off as described in claim 1, which is characterized in that point of the polyethylene glycol
Son amount is 200-40000.
8. a kind of preparation method of the enhancement type hollow fiber film for being not easy to strip off as described in claim 1-7 any one,
It is characterized in that, comprising:
Casting solution preparation step: being respectively added to the Kynoar of formula ratio, polyethylene glycol, Inorganic pore forming agents, solvent can
It in the agitating device of heating, is stirred 40 minutes under the conditions of 25 DEG C of temperature, then is warming up to 45 DEG C and stirs 60 minutes, then will
The adhesion promoter of formula ratio, which is added in agitating device, to be stirred 4-8 hours, finally successively obtains casting solution by vacuum defoamation, filtering；
Casting solution: being evenly applied on the outer surface of hollow internal lining pipe by forming step by spinning appts, is enhanced
Hollow fiber；The air gap for being 250-350mm by length by the doughnut of enhancing, is then immersed in 40 DEG C of hot water and solidifies
Molding, then the immersion treatment in 25-35 DEG C of hot water obtain the enhancement type hollow fiber film for being not easy to strip off after dry.
9. being not easy the preparation method of the enhancement type hollow fiber film stripped off as claimed in claim 8, which is characterized in that molding step
In rapid, the time of immersion treatment is 8 hours.
10. being not easy the preparation method of the enhancement type hollow fiber film stripped off as claimed in claim 8, which is characterized in that molding
In step, the length of the air gap is 300mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910004271.7A CN109675447A (en) | 2019-01-03 | 2019-01-03 | A kind of enhancement type hollow fiber film and preparation method thereof for being not easy to strip off |
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| CN201910004271.7A CN109675447A (en) | 2019-01-03 | 2019-01-03 | A kind of enhancement type hollow fiber film and preparation method thereof for being not easy to strip off |
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Cited By (1)
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| CN101632904A (en) * | 2009-08-19 | 2010-01-27 | 北京碧水源膜科技有限公司 | Polyvinylidene fluoride (PVDF) hollow-fiber membrane with base material and production method thereof |
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Application publication date: 20190426 |