CN108114616A - It is a kind of for polysulfones composite nanometer filtering film of sewage disposal and preparation method thereof - Google Patents
It is a kind of for polysulfones composite nanometer filtering film of sewage disposal and preparation method thereof Download PDFInfo
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- CN108114616A CN108114616A CN201711238644.4A CN201711238644A CN108114616A CN 108114616 A CN108114616 A CN 108114616A CN 201711238644 A CN201711238644 A CN 201711238644A CN 108114616 A CN108114616 A CN 108114616A
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- polysulfones
- basement membrane
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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
- B01D71/66—Polymers having sulfur in the main chain, with or without nitrogen, oxygen or carbon only
- B01D71/68—Polysulfones; Polyethersulfones
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
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- 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
- B01D69/12—Composite membranes; Ultra-thin membranes
- B01D69/125—In situ manufacturing by polymerisation, polycondensation, cross-linking or chemical reaction
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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
- B01D71/76—Macromolecular material not specifically provided for in a single one of groups B01D71/08 - B01D71/74
- B01D71/82—Macromolecular material not specifically provided for in a single one of groups B01D71/08 - B01D71/74 characterised by the presence of specified groups, e.g. introduced by chemical after-treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/36—Hydrophilic membranes
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Abstract
The present invention relates to environmental technology fields, disclose a kind of for polysulfones composite nanometer filtering film of sewage disposal and preparation method thereof.The composite nanometer filtering film includes hydrophilic polysulfones basement membrane and the composite bed being covered in above basement membrane, and the preparation method of the hydrophilic polysulfones basement membrane comprises the following steps:(1)Ethyl alcohol is uniformly mixed with deionized water, then adds in citric acid and polyvinyl alcohol is uniformly mixed, obtain hydrophilic agent;(2)Hydrophobic polysulfones basement membrane is impregnated in hydrophilic agent, impregnates polysulfones basement membrane transparent, obtains intermediate coat 1;(3)Intermediate coat 1 is put into baking oven and is heat-treated, obtains intermediate coat 2;(4)Intermediate coat 2 is put into deionized water and is impregnated, is put into baking oven and dries after taking-up, obtains hydrophilic polysulfones basement membrane.Composite nanometer filtering film of the present invention has higher rejection and water flux simultaneously.
Description
Technical field
The present invention relates to environmental technology field, more particularly, to a kind of polysulfones composite nanometer filtering film for sewage disposal and its
Preparation method.
Background technology
The aperture of NF membrane or separation accuracy between ultrafiltration and it is reverse osmosis between, to the interception of molecule 200 ~
Between 1000Da, and the aperture of film can be used for separating small molecule organic material and ion in 1 ran, and with behaviour
It is low to make pressure, the characteristics of low energy consumption.NF membrane is widely used to sewage disposal, water demineralization and food, dyestuff etc. at present
Industry isolates and purifies process etc..The technology of preparing of NF membrane includes phase inversion, blending method, composite algorithm, thermal induction phase and turns
Change method, chemic modified method, plasma method and the sol-gel method for inoranic membrane.Wherein, composite algorithm is current preparation nanofiltration
The most and most efficient method of film.The compound aperture ultra-thin parting with Nano grade typically on the basement membrane with micropore
Sublayer, common complex method have surface cladding process, interfacial polymerization, situ aggregation method, Plasma Polymerization, uv photo initiated grafting
Method and power formation method etc..Up to now, section polymerization is still to prepare the most important method of composite nanometer filtering film, it can be with
One layer of ultra-thin separating layer is formed on porous basement membrane, and can be realized by optimizing the structure of basement membrane and both separating layers
The optimal separating property of composite membrane.However presently, there are the problem of be composite nanometer filtering film water flux and both rejections it is Bu Tong same
Shi Youhua, when the composite bed compactness of composite nanometer filtering film is good, membrane aperture is smaller, rejection better performances, but its water leads to
Amount reduces.
China Patent Publication No. discloses a kind of positively charged nanofiltration membranes and preparation method thereof, the invention for CN103007791A
Using polyethyleneimine, chitosan quaternary amine, nano-titanium dioxide as water phase filmogen.Pyromellitic trimethylsilyl chloride has organic phase film forming
Basement membrane is submerged initially in aqueous phase solution by material, then is immersed in organic phase solution, obtains composite nanometer filtering film, although this NF membrane has
There is higher rejection, but its water flux is low, reduces UF membrane efficiency.
The content of the invention
The present invention is to overcome the problems, such as that prior art nanometer filtering film water flux is low, provides and a kind of has simultaneously to organic molecule
There is the composite nanometer filtering film of high flux and high retention ratio.
The present invention also provides a kind of preparation methods of the polysulfones NF membrane for sewage disposal.
To achieve these goals, the present invention uses following technical scheme:A kind of polysulfones for sewage disposal is compound to be received
Filter membrane, including hydrophilic polysulfones basement membrane and the composite bed being covered in above basement membrane, the preparation method of the hydrophilic polysulfones basement membrane includes
Following steps:
(1)The ethyl alcohol of 40 ~ 60mL is uniformly mixed with the deionized water of 90 ~ 130mL, then add in 0.2 ~ 0.3mol citric acids and
0.3 ~ 0.6mol polyvinyl alcohol is uniformly mixed, and obtains hydrophilic agent;
(2)Hydrophobic polysulfones basement membrane is impregnated into 15 ~ 20h in hydrophilic agent, impregnates polysulfones basement membrane transparent, obtains intermediate coat 1;
(3)Intermediate coat 1 is put into baking oven and carries out 10 ~ 20min of heat treatment, obtains intermediate coat 2;
(4)Intermediate coat 2 is put into deionized water impregnate 2 ~ 3 it is small when, be put into baking oven and dry after taking-up, drying time for 15 ~
20min obtains hydrophilic polysulfones basement membrane.
Citric acid has more carboxyl, has more hydroxyl in polyvinyl alcohol, and carboxyl and hydroxyl have preferable parent
It is aqueous, it is adhered on polysulfones, makes polysulfones that there is preferable hydrophilicity, so as to improve the hydrophily of basement membrane, increase its water
Flux.Even if composite bed is comparatively dense, its water flux is adversely affected, but relies on the hydrophily for improving basement membrane that can make up
This defect improves its water flux, so that composite nanometer filtering film has higher rejection and water flux simultaneously.
Preferably, the step(3)Middle heat treatment temperature is 45 ~ 60 DEG C.
Preferably, the step(4)Middle drying temperature is 50 ~ 70 DEG C.
A kind of preparation method for sewage disposal polysulfones composite nanometer filtering film comprises the following steps:
(a)Organic phase solution is prepared:Pyromellitic trimethylsilyl chloride and n-hexane are added in conical flask, then heating water bath 40 ~
60min, bath temperature are controlled at 40 ~ 50 DEG C, obtain the pyromellitic trimethylsilyl chloride solution that mass fraction is 0.3% ~ 0.5%;
(b)Aqueous phase solution is prepared:Di-sec-butylamine is added in deionized water, obtains the di-sec-butylamine that mass fraction is 0.5 ~ 3%
Solution;
(c)It is prepared by composite bed:Dry hydrophilic polysulfones basement membrane is dipped into 30 ~ 40min in aqueous phase solution, uses roller after taking-up rapidly
The extra aqueous phase solution of membrane surface is removed, is then placed in 20 ~ 50s of immersion in organic phase solution, obtains preliminary crosslinked nanofiltration
Film;
(d)Cure crosslinking:Preliminary crosslinked NF membrane is placed in oven and dried 30 ~ 50min, obtains polysulfones composite nanometer filtering film;
(e)Cleaning preserves:Polysulfones composite nanometer filtering film is put into deionized water and is cleaned, be then stored in mass fraction for 0.3 ~
It is spare in 0.6% sodium bicarbonate solution.
Separating layer prepared by methyl n-amylamine and pyromellitic trimethylsilyl chloride is more secured, is not easy occur damaged, system under hydraulic pressure
Standby composite nanometer filter film properties are relatively stable.
Preferably, the step(d)Middle curing crosslinking temperature is 40 ~ 60 DEG C.
Therefore, the present invention has the advantages that:(1)Basement membrane has preferable hydrophily, is conducive to improve composite nanometer filter
The water flux of film;(2)Composite nanometer filtering film has higher rejection and water flux simultaneously;(3)Composite bed is more secured, be not easy from
It comes off on basement membrane.
Specific embodiment
Below by specific embodiment, technical scheme is described further.
In the present invention, if not refering in particular to, used raw material and equipment etc. are commercially available or commonly used in the art,
Method in embodiment is the conventional method of this field unless otherwise instructed.
Embodiment 1
A kind of polysulfones composite nanometer filtering film for sewage disposal including hydrophilic polysulfones basement membrane and is covered in compound above basement membrane
Layer, the preparation method of the hydrophilic polysulfones basement membrane comprise the following steps:
(1)The ethyl alcohol of 40mL with the deionized water of 90mL is uniformly mixed, then adds in 0.2mol citric acids and the poly- second of 0.3mol
Enol is uniformly mixed, and obtains hydrophilic agent;
(2)Hydrophobic polysulfones basement membrane is impregnated into 15h in hydrophilic agent, impregnates polysulfones basement membrane transparent, obtains intermediate coat 1;
(3)Intermediate coat 1 is put into baking oven and carries out heat treatment 10min, heat treatment temperature is 45 DEG C, obtains intermediate coat 2;
(4)By intermediate coat 2 be put into deionized water impregnate 2 it is small when, be put into baking oven and dry after taking-up, drying time 15min,
Drying temperature is 50 DEG C, obtains hydrophilic polysulfones basement membrane.
A kind of preparation method of polysulfones composite nanometer filtering film for sewage disposal, comprises the following steps:
(a)Organic phase solution is prepared:Pyromellitic trimethylsilyl chloride and n-hexane are added in conical flask, then heating water bath 40min,
Bath temperature is controlled at 40 DEG C, obtains the pyromellitic trimethylsilyl chloride solution that mass fraction is 0.3%;
(b)Aqueous phase solution is prepared:Di-sec-butylamine is added in deionized water, it is molten to obtain the di-sec-butylamine that mass fraction is 0.5%
Liquid;
(c)It is prepared by composite bed:Dry hydrophilic polysulfones basement membrane is dipped into 30min in aqueous phase solution, is removed after taking-up with roller rapidly
The aqueous phase solution that membrane surface is extra is removed, is then placed in organic phase solution and impregnates 20s, obtains preliminary crosslinked NF membrane;
(d)Cure crosslinking:Preliminary crosslinked NF membrane is placed in oven and dried 30min, it is 40 DEG C to cure crosslinking temperature, is obtained
Polysulfones composite nanometer filtering film;
(e)Cleaning preserves:Polysulfones composite nanometer filtering film is put into deionized water and is cleaned, it is 0.3% to be then stored in mass fraction
It is spare in sodium bicarbonate solution.
Embodiment 2
A kind of polysulfones composite nanometer filtering film for sewage disposal including hydrophilic polysulfones basement membrane and is covered in compound above basement membrane
Layer, the preparation method of the hydrophilic polysulfones basement membrane comprise the following steps:
(1)The ethyl alcohol of 45mL with the deionized water of 100mL is uniformly mixed, then 0.22mol citric acids is added in and 0.4mol gathers
Vinyl alcohol is uniformly mixed, and obtains hydrophilic agent;
(2)Hydrophobic polysulfones basement membrane is impregnated into 16h in hydrophilic agent, impregnates polysulfones basement membrane transparent, obtains intermediate coat 1;
(3)Intermediate coat 1 is put into baking oven and carries out heat treatment 12min, heat treatment temperature is 48 DEG C, obtains intermediate coat 2;
(4)By intermediate coat 2 be put into deionized water impregnate 2.2 it is small when, be put into baking oven and dry after taking-up, drying time is
16min, drying temperature are 55 DEG C, obtain hydrophilic polysulfones basement membrane.
A kind of preparation method of polysulfones composite nanometer filtering film for sewage disposal, comprises the following steps:
(a)Organic phase solution is prepared:Pyromellitic trimethylsilyl chloride and n-hexane are added in conical flask, then heating water bath 45min,
Bath temperature is controlled at 42 DEG C, obtains the pyromellitic trimethylsilyl chloride solution that mass fraction is 0.35%;
(b)Aqueous phase solution is prepared:Di-sec-butylamine is added in deionized water, it is molten to obtain the di-sec-butylamine that mass fraction is 1%
Liquid;
(c)It is prepared by composite bed:Dry hydrophilic polysulfones basement membrane is dipped into 32min in aqueous phase solution, is removed after taking-up with roller rapidly
The aqueous phase solution that membrane surface is extra is removed, is then placed in organic phase solution and impregnates 30s, obtains preliminary crosslinked NF membrane;
(d)Cure crosslinking:Preliminary crosslinked NF membrane is placed in oven and dried 35min, it is 45 DEG C to cure crosslinking temperature, is obtained
Polysulfones composite nanometer filtering film;
(e)Cleaning preserves:Polysulfones composite nanometer filtering film is put into deionized water and is cleaned, it is 0.4% to be then stored in mass fraction
It is spare in sodium bicarbonate solution.
Embodiment 3
A kind of polysulfones composite nanometer filtering film for sewage disposal including hydrophilic polysulfones basement membrane and is covered in compound above basement membrane
Layer, the preparation method of the hydrophilic polysulfones basement membrane comprise the following steps:
(1)The ethyl alcohol of 50mL with the deionized water of 110mL is uniformly mixed, then 0.25mol citric acids is added in and 0.45mol gathers
Vinyl alcohol is uniformly mixed, and obtains hydrophilic agent;
(2)Hydrophobic polysulfones basement membrane is impregnated into 17h in hydrophilic agent, impregnates polysulfones basement membrane transparent, obtains intermediate coat 1;
(3)Intermediate coat 1 is put into baking oven and carries out heat treatment 15min, heat treatment temperature is 50 DEG C, obtains intermediate coat 2;
(4)By intermediate coat 2 be put into deionized water impregnate 2.5 it is small when, be put into baking oven and dry after taking-up, drying time is
17min, drying temperature are 60 DEG C, obtain hydrophilic polysulfones basement membrane.
A kind of preparation method of polysulfones composite nanometer filtering film for sewage disposal, comprises the following steps:
(a)Organic phase solution is prepared:Pyromellitic trimethylsilyl chloride and n-hexane are added in conical flask, then heating water bath 50min,
Bath temperature is controlled at 45 DEG C, obtains the pyromellitic trimethylsilyl chloride solution that mass fraction is 0.4%;
(b)Aqueous phase solution is prepared:Di-sec-butylamine is added in deionized water, it is molten to obtain the di-sec-butylamine that mass fraction is 1.5%
Liquid;
(c)It is prepared by composite bed:Dry hydrophilic polysulfones basement membrane is dipped into 35min in aqueous phase solution, is removed after taking-up with roller rapidly
The aqueous phase solution that membrane surface is extra is removed, is then placed in organic phase solution and impregnates 35s, obtains preliminary crosslinked NF membrane;
(d)Cure crosslinking:Preliminary crosslinked NF membrane is placed in oven and dried 40min, it is 50 DEG C to cure crosslinking temperature, is obtained
Polysulfones composite nanometer filtering film;
(e)Cleaning preserves:Polysulfones composite nanometer filtering film is put into deionized water and is cleaned, is then stored in mass fraction as 0.45%
Sodium bicarbonate solution in it is spare.
Embodiment 4
A kind of polysulfones composite nanometer filtering film for sewage disposal including hydrophilic polysulfones basement membrane and is covered in compound above basement membrane
Layer, the preparation method of the hydrophilic polysulfones basement membrane comprise the following steps:
(1)The ethyl alcohol of 55mL with the deionized water of 120mL is uniformly mixed, then 0.28mol citric acids is added in and 0.5mol gathers
Vinyl alcohol is uniformly mixed, and obtains hydrophilic agent;
(2)Hydrophobic polysulfones basement membrane is impregnated into 18h in hydrophilic agent, impregnates polysulfones basement membrane transparent, obtains intermediate coat 1;
(3)Intermediate coat 1 is put into baking oven and carries out heat treatment 18min, heat treatment temperature is 55 DEG C, obtains intermediate coat 2;
(4)By intermediate coat 2 be put into deionized water impregnate 2.8 it is small when, be put into baking oven and dry after taking-up, drying time is
18min, drying temperature are 65 DEG C, obtain hydrophilic polysulfones basement membrane.
A kind of preparation method of polysulfones composite nanometer filtering film for sewage disposal, comprises the following steps:
(a)Organic phase solution is prepared:Pyromellitic trimethylsilyl chloride and n-hexane are added in conical flask, then heating water bath 55min,
Bath temperature is controlled at 48 DEG C, obtains the pyromellitic trimethylsilyl chloride solution that mass fraction is 0.45%;
(b)Aqueous phase solution is prepared:Di-sec-butylamine is added in deionized water, it is molten to obtain the di-sec-butylamine that mass fraction is 2%
Liquid;
(c)It is prepared by composite bed:Dry hydrophilic polysulfones basement membrane is dipped into 38min in aqueous phase solution, is removed after taking-up with roller rapidly
The aqueous phase solution that membrane surface is extra is removed, is then placed in organic phase solution and impregnates 40s, obtains preliminary crosslinked NF membrane;
(d)Cure crosslinking:Preliminary crosslinked NF membrane is placed in oven and dried 45min, it is 55 DEG C to cure crosslinking temperature, is obtained
Polysulfones composite nanometer filtering film;
(e)Cleaning preserves:Polysulfones composite nanometer filtering film is put into deionized water and is cleaned, it is 0.5% to be then stored in mass fraction
It is spare in sodium bicarbonate solution.
Embodiment 5
A kind of polysulfones composite nanometer filtering film for sewage disposal including hydrophilic polysulfones basement membrane and is covered in compound above basement membrane
Layer, the preparation method of the hydrophilic polysulfones basement membrane comprise the following steps:
(1)The ethyl alcohol of 60mL with the deionized water of 130mL is uniformly mixed, then adds in 0.3mol citric acids and the poly- second of 0.6mol
Enol is uniformly mixed, and obtains hydrophilic agent;
(2)Hydrophobic polysulfones basement membrane is impregnated into 20h in hydrophilic agent, impregnates polysulfones basement membrane transparent, obtains intermediate coat 1;
(3)Intermediate coat 1 is put into baking oven and carries out heat treatment 20min, heat treatment temperature is 60 DEG C, obtains intermediate coat 2;
(4)By intermediate coat 2 be put into deionized water impregnate 3 it is small when, be put into baking oven and dry after taking-up, drying time 20min,
Drying temperature is 70 DEG C, obtains hydrophilic polysulfones basement membrane.
A kind of preparation method of polysulfones composite nanometer filtering film for sewage disposal, comprises the following steps:
(a)Organic phase solution is prepared:Pyromellitic trimethylsilyl chloride and n-hexane are added in conical flask, then heating water bath 60min,
Bath temperature is controlled at 50 DEG C, obtains the pyromellitic trimethylsilyl chloride solution that mass fraction is 0.5%;
(b)Aqueous phase solution is prepared:Di-sec-butylamine is added in deionized water, it is molten to obtain the di-sec-butylamine that mass fraction is 3%
Liquid;
(c)It is prepared by composite bed:Dry hydrophilic polysulfones basement membrane is dipped into 40min in aqueous phase solution, is removed after taking-up with roller rapidly
The aqueous phase solution that membrane surface is extra is removed, is then placed in organic phase solution and impregnates 50s, obtains preliminary crosslinked NF membrane;
(d)Cure crosslinking:Preliminary crosslinked NF membrane is placed in oven and dried 50min, it is 60 DEG C to cure crosslinking temperature, is obtained
Polysulfones composite nanometer filtering film;
(e)Cleaning preserves:Polysulfones composite nanometer filtering film is put into deionized water and is cleaned, it is 0.6% to be then stored in mass fraction
It is spare in sodium bicarbonate solution.
The above described is only a preferred embodiment of the present invention, not make limitation in any form to the present invention, though
So the present invention is disclosed above with preferred embodiment, however is not limited to the present invention, any to be familiar with this professional technology people
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification
For the equivalent embodiment of equivalent variations, as long as being without departing from technical solution of the present invention content, technical spirit pair according to the invention
Any simple modification, equivalent change and modification that above example is made, in the range of still falling within technical solution of the present invention.
Claims (5)
1. a kind of polysulfones composite nanometer filtering film for sewage disposal including hydrophilic polysulfones basement membrane and is covered in compound above basement membrane
Layer, which is characterized in that the preparation method of the hydrophilic polysulfones basement membrane comprises the following steps:
(1)The ethyl alcohol of 40 ~ 60mL is uniformly mixed with the deionized water of 90 ~ 130mL, then add in 0.2 ~ 0.3mol citric acids and
0.3 ~ 0.6mol polyvinyl alcohol is uniformly mixed, and obtains hydrophilic agent;
(2)Hydrophobic polysulfones basement membrane is impregnated into 15 ~ 20h in hydrophilic agent, impregnates polysulfones basement membrane transparent, obtains intermediate coat 1;
(3)Intermediate coat 1 is put into baking oven and carries out 10 ~ 20min of heat treatment, obtains intermediate coat 2;
(4)Intermediate coat 2 is put into deionized water impregnate 2 ~ 3 it is small when, be put into baking oven and dry after taking-up, drying time for 15 ~
20min obtains hydrophilic polysulfones basement membrane.
A kind of 2. polysulfones composite nanometer filtering film for sewage disposal according to claim 1, which is characterized in that the step
(3)Middle heat treatment temperature is 45 ~ 60 DEG C.
A kind of 3. polysulfones composite nanometer filtering film for sewage disposal according to claim 1, which is characterized in that the step
(4)Middle drying temperature is 50 ~ 70 DEG C.
4. a kind of preparation side for sewage disposal polysulfones composite nanometer filtering film as described in claim 1 ~ 3 any claim
Method, which is characterized in that comprise the following steps:
(a)Organic phase solution is prepared:Pyromellitic trimethylsilyl chloride and n-hexane are added in conical flask, then heating water bath 40 ~
60min, bath temperature are controlled at 40 ~ 50 DEG C, obtain the pyromellitic trimethylsilyl chloride solution that mass fraction is 0.3% ~ 0.5%;
(b)Aqueous phase solution is prepared:Di-sec-butylamine is added in deionized water, obtains the di-sec-butylamine that mass fraction is 0.5 ~ 3%
Solution;
(c)It is prepared by composite bed:Dry hydrophilic polysulfones basement membrane is dipped into 30 ~ 40min in aqueous phase solution, uses roller after taking-up rapidly
The extra aqueous phase solution of membrane surface is removed, is then placed in 20 ~ 50s of immersion in organic phase solution, obtains preliminary crosslinked nanofiltration
Film;
(d)Cure crosslinking:Preliminary crosslinked NF membrane is placed in oven and dried 30 ~ 50min, obtains polysulfones composite nanometer filtering film;
(e)Cleaning preserves:Polysulfones composite nanometer filtering film is put into deionized water and is cleaned, be then stored in mass fraction for 0.3 ~
It is spare in 0.6% sodium bicarbonate solution.
5. a kind of preparation method for sewage disposal polysulfones composite nanometer filtering film according to claim 4, which is characterized in that
The step(d)Middle curing crosslinking temperature is 40 ~ 60 DEG C.
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Cited By (2)
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RU2691369C1 (en) * | 2018-10-24 | 2019-06-11 | федеральное государственное автономное образовательное учреждение высшего образования "Российский государственный университет нефти и газа (национальный исследовательский университет) имени И.М. Губкина" | Method of producing filter material |
CN110292865A (en) * | 2019-06-27 | 2019-10-01 | 三达膜科技(厦门)有限公司 | A kind of automatically cleaning carbonitride/titanium dioxide/polyvinyl alcohol composite nanometer filtering film preparation method |
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CN103638832A (en) * | 2013-11-14 | 2014-03-19 | 株洲时代新材料科技股份有限公司 | Polyamide composite membrane and production method thereof |
CN105080352A (en) * | 2014-04-24 | 2015-11-25 | 中国石油化工股份有限公司 | Composite reverse osmosis membrane and preparation method thereof |
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