CN107433139A - A kind of preparation method of anti-clogging antibacterial type charged nanofiltration membrane - Google Patents
A kind of preparation method of anti-clogging antibacterial type charged nanofiltration membrane Download PDFInfo
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- CN107433139A CN107433139A CN201710424371.6A CN201710424371A CN107433139A CN 107433139 A CN107433139 A CN 107433139A CN 201710424371 A CN201710424371 A CN 201710424371A CN 107433139 A CN107433139 A CN 107433139A
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- 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
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- 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
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/027—Nanofiltration
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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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- 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
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
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Abstract
The invention belongs to hyperfiltration technique field, and in particular to a kind of preparation method of anti-clogging antibacterial type charged nanofiltration membrane.Porous heterostructured material of the invention by the way that hectorite and surfactant and tetraethyl orthosilicate to be combined into stability, its backing material hectorite crystal is that the octahedra composition lamellar structure of one layer of magnesia is pressed from both sides among two layers of silicon-oxy tetrahedron, very strong electron deficient is formed in lamella and negatively charged, with excellent absorption, ion-exchange performance, simultaneously, nano phase ag_2 o is embedded in interlayer, prepare modified inorganic particles, by by inorganic particle dispersion and preparing charged nanofiltration membrane, silver-colored simple substance is decomposed into after silver oxide powder is fired, silver-colored simple substance is used for selective catalysis and reacts and reinforce charged nanofiltration membrane internal void, load of microorganisms is suppressed simultaneously, effective reinforced membrane hole strength, improve charged nanofiltration membrane anti-pollution characteristic, suppress microbial reproduction and form biomembrane, with wide prospect of the application.
Description
Technical field
The invention belongs to hyperfiltration technique field, and in particular to a kind of preparation method of anti-clogging antibacterial type charged nanofiltration membrane.
Background technology
Conventional membrane filtration separation process, is all based on a kind of principle of physics screening, i.e. film allows smaller than its aperture
Component passes through and retains component similar in or aperture bigger than its aperture.With the reduction of component media particle size to be separated, film used
Aperture also must accordingly reduce, this will certainly cause flux decline, operating cost rise the problems such as.Charged nanofiltration membrane is in recent years
The another new filter membrane to grow up, there is fixed charge on its surfaces externally and internally, according to its separating and filtering principle, except neutrality
Outside physics screening of the film based on pore size, also there are Electrostatic Absorption and the repulsive interaction of uniqueness.This allows for using UF membrane
The ion of different valence state is possibly realized, while also can separate the component that relative molecular mass is close and charging performance is different with it.
Due to introducing charged group in film, the hydrophily of film is strengthened, thus the water flux increase of film.Again due between film and solution
Electrostatic interaction, the osmotic pressure of solution reduces, and is consequently adapted to low pressure operation, and charged membrane also have resistance to compacting, acid and alkali-resistance and
The advantages that antimicrobial, bacterium.Charged membrane has not available for neutral film in terms of permeable, antipollution and selective penetrated property
Advantage and purposes.
Charged nanofiltration membrane is because its specific retention scope and charge effect have industrially been widely used, wherein main
What is wanted is sieve effect of the removal mainly by NF membrane of low molecule organic matter, such as natural organic matter, low molecule dyestuff, medicine
Deng.Because NF membrane is finer and close compared with milipore filter, its pore diameter range between 0.5~2nm, be mainly used in molecular weight 100~
The removal of 1000Da organic matters, and its operating pressure is less than reverse osmosis membrane, because power consumption and power cost are relatively low, has larger
Advantage.NF membrane is mainly used in water process and sewage disposal, is vulnerable to fouling membrane in use, and fouling membrane refers in reality
During the use of border, the pollutant absorption in feed liquid is deposited on film surface, or even blocks infiltration and separation property that fenestra causes film
The phenomenon that can decline.Pollutant is divided into inorganic, organic, biological pollutant three major types, common inorganic pollution have molecule,
The inorganic salts crystallization such as suspension, colloid, metal class sediment and calcium, magnesium, phosphorus, in filter process, inorganic pollution is easy
Deposited on film surface, block duct, colloidal type material is then readily adsorbed in film surface so as to reduce the effective filtration area of film.Most
Common are organic pollutants has protein, humus, lignin etc., and the main drive for causing protein contamination film surface is quiet
Electric attraction and hydrophobic effect, so protein is typically readily adsorbed in coarse and hydrophobic film surface, organic contamination is general in addition
Store-through and be very difficult to remove, so the polymeric membrane surface of the high hydrophilic low roughness of structure also turns into the pass of prevention film organic contamination
Where key.Common biological pollution material, mainly including bacterium, algae, fungi etc..It is difficult because it has stronger fertility
To remove biomembrane completely, the biological pollution for charged nanofiltration membrane is similar with milipore filter at present, mainly by introducing antibacterial
Agent reaches fungistatic effect.Prevent inorganic wastes heap membrane pores from blocking so preparing one kind, and it is numerous effectively to suppress film surface biological
The charged nanofiltration membrane grown is necessary.
The content of the invention
The technical problems to be solved by the invention：It is vulnerable to fouling membrane for existing charged nanofiltration membrane, causes inorganic matter to block up
Fenestra is filled in, biomass is supported on film surface and forms the problem of biomembrane reduces membrane flux, there is provided a kind of anti-clogging antibacterial type lotus
The preparation method of nanofiltration membrane.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
（1）Take 10~15g silver nitrates to be mixed with 60~70mL deionized waters, the ammonia spirit of 25~30mL mass fractions 10% is added dropwise
And be stirred, obtain silver ammino solution, in mass ratio 1:8, polyvinyl alcohol is added in the sodium hydroxide solution of mass fraction 8%, stirred
Mix and mix to obtain matrix liquid, in mass ratio 3:2, silver ammino solution is added dropwise in matrix liquid, centrifuged after being added dropwise to complete, under collection
Layer precipitation, scrubbed drying, is prepared into nano phase ag_2 o；
（2）Take hectorite to crush and mill, cross 200 mesh sieves and collect to obtain lithium soap stone powder, count in parts by weight, weigh 45~50 parts
Lauryl amine, nano phase ag_2 o, 15~20 parts of tetraethyl orthosilicates and 25~30 parts of lithium soap stone powders of 15~20 parts of above-mentioned preparations stir
Mix and mix to obtain mixed slurry, mixed slurry is poured into mould, stand curing and demolding and blank must be dried, blank will be dried
Milled 200 mesh sieve after roasting, obtain the porous isomery powder of hectorite；
（3）In mass ratio 1:10, the porous isomery powder of hectorite will be dried and mixed with DMA, ultrasonic disperse obtains
Modified dispersion liquid, then count in parts by weight, 45~50 parts of modified dispersion liquids, 15~20 parts of dry polyether sulfones and 1~2 are weighed respectively
Part polyvinylpyrrolidone is stirred, and is filtered to get filtrate, standing and defoaming obtains casting solution, and casting solution is coated to glass plate table
Face, it is 0.15~0.18mm to control coating thickness, is dried after the completion of to be coated, you can it is charged to be prepared into a kind of anti-clogging antibacterial type
NF membrane.
Step（2）Described drying blank sintering temperature is 800~1000 DEG C.
Step（3）Described filtering is filtered using 75~80 mesh filter clothes.
Compared with other method, advantageous effects are the present invention：
（1）Porous heterostructured material of the invention by the way that hectorite and surfactant and tetraethyl orthosilicate to be combined into stability,
Its backing material hectorite crystal structure, it is that the octahedra composition lamellar structure of one layer of magnesia is pressed from both sides among two layers of silicon-oxy tetrahedron,
Part magnesium ion is replaced with lithium ion in magnesia octahedron inside lamella, make to be formed very strong electron deficient in lamella and with bearing
Electric charge, there is excellent absorption, ion-exchange performance；
（2）Nano phase ag_2 o is embedded in hectorite crystal structure interlayer by the present invention, prepares modified inorganic particles, by will be inorganic
Particle disperses and prepares charged nanofiltration membrane, and silver-colored simple substance is decomposed into after silver oxide powder is fired, and silver-colored simple substance is used for selective catalysis
Reaction and reinforcing charged nanofiltration membrane internal void, while load of microorganisms is suppressed, effective reinforced membrane hole strength, improve lotus
Nanofiltration membrane anti-pollution characteristic, suppress microbial reproduction and form biomembrane.
Embodiment
10~15g silver nitrates are weighed first and 60~70mL deionized waters are placed in 500mL three-necked flasks, are being stirred
After 10~15min, to the ammonia spirit of 25~30mL mass fractions 10% is added dropwise in three-necked flask, it is 1~2mL/ to control drop rate
Min, after being added dropwise to complete, 10~15min of mixing is stirred at room temperature, is prepared into silver ammino solution；In mass ratio 1:8, by poly- second
Enol is added in the sodium hydroxide solution of mass fraction 8%, is stirred and is placed in being prepared into matrix liquid in conical flask, then
In mass ratio 3:2, silver ammino solution is added dropwise in matrix liquid, it is 1~2h to control time for adding, after being added dropwise to complete, then
10~15min is centrifuged under 1500~3000r/min, after collecting lower sediment and washing 3~5 times with absolute ethyl alcohol, 75
6~8h is dried at~80 DEG C, is prepared into nano phase ag_2 o；Hectorite is chosen, is crushed and milled, 200 mesh sieves is crossed and obtains lithium soap
Stone powder, then count in parts by weight, respectively weigh 45~50 parts of lauryl amines, 15~20 parts of nano phase ag_2 os, 15~20 parts just
Silester and 25~30 parts of lithium soap stone powders are placed in beaker, are stirred to obtain mixed slurry；Mixed slurry is poured into mould
In tool, after standing 6~8h of solidification at room temperature, blank must be dried by being stripped, and blank is placed in into 800~1000 DEG C of Muffle kiln roastings
3~5h, after standing is cooled to room temperature, mills and cross 200 mesh sieves, be prepared into the porous isomery powder of hectorite；Choose polyether sulfone and
The porous isomery powder of hectorite, which is placed at 95~100 DEG C, dries 20~24h, and it is porous with drying hectorite must to dry polyether sulfone respectively
Isomery powder, then in mass ratio 1:10, the dry porous isomery powder of hectorite is mixed with DMA and is placed in
In beaker, 25~30min of ultrasonic disperse under 200~300W, modified dispersion liquid is prepared into；Count, weigh respectively in parts by weight
45~50 parts of modified dispersion liquids, 15~20 parts of dry polyether sulfones and 1~2 part of polyvinylpyrrolidone are placed in beaker, in room temperature
Under be stirred 10~12h after, then with 75~80 mesh filter-cloth filterings, obtain filtrate and be placed in beaker, at room temperature standing and defoaming
10~12h, it is prepared into casting solution；Casting solution is coated to glass pane surface, it is 0.15~0.18mm to control coating thickness, to be coated
After the completion of covering, at room temperature after 3~5h of standing and drying, then 6~8h is dried in 25~30 DEG C of baking ovens, you can be prepared into a kind of anti-
Block antibacterial type charged nanofiltration membrane.
Example 1
Weigh 10g silver nitrates first to be placed in 500mL three-necked flasks with 60mL deionized waters, after 10min is stirred, to three
The ammonia spirit of 25mL mass fractions 10% is added dropwise in mouth flask, it is 1mL/min to control drop rate, after being added dropwise to complete, in room temperature
Under be stirred 10min, be prepared into silver ammino solution；In mass ratio 1:8, polyvinyl alcohol is added to the sodium hydroxide of mass fraction 8%
In solution, it is stirred and is placed in being prepared into matrix liquid in conical flask, then in mass ratio 3:2, silver ammino solution is added dropwise to
In matrix liquid, it is 1h to control time for adding, after being added dropwise to complete, then 10min is centrifuged under 1500r/min, collects lower floor
After precipitating and washing 3 times with absolute ethyl alcohol, 6h is dried at 75 DEG C, is prepared into nano phase ag_2 o；Hectorite is chosen, is crushed
And mill, cross 200 mesh sieves obtain lithium soap stone powder, then count in parts by weight, respectively weigh 45 parts of lauryl amines, 15 parts it is nano oxidized
Silver, 15 parts of tetraethyl orthosilicates and 25 parts of lithium soap stone powders are placed in beaker, are stirred to obtain mixed slurry；Mixed slurry is poured into a mould
Into mould, after standing solidification 6h at room temperature, blank must be dried by being stripped, and blank is placed in into 800 DEG C of Muffle kiln roasting 3h, quiet
Put after being cooled to room temperature, mill and cross 200 mesh sieves, be prepared into the porous isomery powder of hectorite；Choose polyether sulfone and hectorite is more
Hole isomery powder, which is placed at 95 DEG C, dries 20h, must dry polyether sulfone respectively and dry the porous isomery powder of hectorite, then by quality
Than 1:10, the dry porous isomery powder of hectorite is mixed with DMA and is placed in beaker, is surpassed under 200W
Sound disperses 25min, is prepared into modified dispersion liquid；Count in parts by weight, weigh 45 parts of modified dispersion liquids, 15 parts of dry polyethers respectively
Sulfone and 1 part of polyvinylpyrrolidone are placed in beaker, after mixing 10h is stirred at room temperature, then with 75 mesh filter-cloth filterings, obtain filtrate
It is placed in beaker, at room temperature standing and defoaming 10h, is prepared into casting solution；Casting solution is coated to glass pane surface, control and applied
It is 0.15mm to cover thickness, after the completion of to be coated, at room temperature after standing and drying 3h, then 6h is dried in 25 DEG C of baking ovens, you can system
It is standby to obtain a kind of anti-clogging antibacterial type charged nanofiltration membrane.
Anti-clogging antibacterial type charged nanofiltration membrane prepared by the present invention be can be widely applied into the treatment technologies such as waste water from dyestuff neck
Domain, an anti-clogging antibacterial type charged nanofiltration membrane is chosen first, secures it in pressure vessel formula plate and frame module, then exists
Under magnetic stirrer, waste water is pumped in pressure vessel formula plate and frame module, control waste water from dyestuff flow velocity cause into
The post pressure of sample post maintains 3MPa, and waste water from dyestuff filtration treatment can be completed by receiving permeate after press filtration processing 25min.
Example 2
Weigh 13g silver nitrates first to be placed in 500mL three-necked flasks with 65mL deionized waters, after 13min is stirred, to three
The ammonia spirit of 28mL mass fractions 10% is added dropwise in mouth flask, it is 2mL/min to control drop rate, after being added dropwise to complete, in room temperature
Under be stirred 13min, be prepared into silver ammino solution；In mass ratio 1:8, polyvinyl alcohol is added to the sodium hydroxide of mass fraction 8%
In solution, it is stirred and is placed in being prepared into matrix liquid in conical flask, then in mass ratio 3:2, silver ammino solution is added dropwise to
In matrix liquid, it is 2h to control time for adding, after being added dropwise to complete, then 13min is centrifuged under 2200r/min, collects lower floor
After precipitating and washing 4 times with absolute ethyl alcohol, 7h is dried at 78 DEG C, is prepared into nano phase ag_2 o；Hectorite is chosen, is crushed
And mill, cross 200 mesh sieves obtain lithium soap stone powder, then count in parts by weight, respectively weigh 48 parts of lauryl amines, 18 parts it is nano oxidized
Silver, 18 parts of tetraethyl orthosilicates and 28 parts of lithium soap stone powders are placed in beaker, are stirred to obtain mixed slurry；Mixed slurry is poured into a mould
Into mould, after standing solidification 7h at room temperature, blank must be dried by being stripped, and blank is placed in into 900 DEG C of Muffle kiln roasting 4h, quiet
Put after being cooled to room temperature, mill and cross 200 mesh sieves, be prepared into the porous isomery powder of hectorite；Choose polyether sulfone and hectorite is more
Hole isomery powder, which is placed at 98 DEG C, dries 22h, must dry polyether sulfone respectively and dry the porous isomery powder of hectorite, then by quality
Than 1:10, the dry porous isomery powder of hectorite is mixed with DMA and is placed in beaker, is surpassed under 250W
Sound disperses 28min, is prepared into modified dispersion liquid；Count in parts by weight, weigh 48 parts of modified dispersion liquids, 18 parts of dry polyethers respectively
Sulfone and 2 parts of polyvinylpyrrolidones are placed in beaker, after mixing 11h is stirred at room temperature, then with 78 mesh filter-cloth filterings, obtain filtrate
It is placed in beaker, at room temperature standing and defoaming 11h, is prepared into casting solution；Casting solution is coated to glass pane surface, control and applied
It is 0.16mm to cover thickness, after the completion of to be coated, at room temperature after standing and drying 4h, then 7h is dried in 28 DEG C of baking ovens, you can system
It is standby to obtain a kind of anti-clogging antibacterial type charged nanofiltration membrane.
Anti-clogging antibacterial type charged nanofiltration membrane prepared by the present invention be can be widely applied into the treatment technologies such as waste water from dyestuff neck
Domain, an anti-clogging antibacterial type charged nanofiltration membrane is chosen first, secures it in pressure vessel formula plate and frame module, then exists
Under magnetic stirrer, waste water is pumped in pressure vessel formula plate and frame module, control waste water from dyestuff flow velocity cause into
The post pressure of sample post maintains 4MPa, and waste water from dyestuff filtration treatment can be completed by receiving permeate after press filtration processing 27min.
Example 3
Weigh 15g silver nitrates first to be placed in 500mL three-necked flasks with 70mL deionized waters, after 15min is stirred, to three
The ammonia spirit of 30mL mass fractions 10% is added dropwise in mouth flask, it is 2mL/min to control drop rate, after being added dropwise to complete, in room temperature
Under be stirred 15min, be prepared into silver ammino solution；In mass ratio 1:8, polyvinyl alcohol is added to the sodium hydroxide of mass fraction 8%
In solution, it is stirred and is placed in being prepared into matrix liquid in conical flask, then in mass ratio 3:2, silver ammino solution is added dropwise to
In matrix liquid, it is 2h to control time for adding, after being added dropwise to complete, then 15min is centrifuged under 3000r/min, collects lower floor
After precipitating and washing 5 times with absolute ethyl alcohol, 8h is dried at 80 DEG C, is prepared into nano phase ag_2 o；Hectorite is chosen, is crushed
And mill, cross 200 mesh sieves obtain lithium soap stone powder, then count in parts by weight, respectively weigh 50 parts of lauryl amines, 20 parts it is nano oxidized
Silver, 20 parts of tetraethyl orthosilicates and 30 parts of lithium soap stone powders are placed in beaker, are stirred to obtain mixed slurry；Mixed slurry is poured into a mould
Into mould, after standing solidification 8h at room temperature, blank must be dried by being stripped, and blank is placed in into 1000 DEG C of Muffle kiln roasting 5h,
After standing is cooled to room temperature, mills and cross 200 mesh sieves, be prepared into the porous isomery powder of hectorite；Choose polyether sulfone and hectorite
Porous isomery powder, which is placed at 100 DEG C, dries 24h, must dry polyether sulfone respectively and dry the porous isomery powder of hectorite, then press
Mass ratio 1:10, the dry porous isomery powder of hectorite is mixed with DMA and is placed in beaker, in 300W
Lower ultrasonic disperse 30min, is prepared into modified dispersion liquid；Count in parts by weight, weigh 50 parts of modified dispersion liquids, 20 parts of dryings respectively
Polyether sulfone and 2 parts of polyvinylpyrrolidones are placed in beaker, after mixing 12h is stirred at room temperature, then with 80 mesh filter-cloth filterings, are obtained
Filtrate is placed in beaker, at room temperature standing and defoaming 12h, is prepared into casting solution；Casting solution is coated to glass pane surface, control
Coating thickness processed is 0.18mm, after the completion of to be coated, at room temperature after standing and drying 5h, then 8h is dried in 30 DEG C of baking ovens, i.e.,
A kind of anti-clogging antibacterial type charged nanofiltration membrane can be prepared into.
Anti-clogging antibacterial type charged nanofiltration membrane prepared by the present invention be can be widely applied into the treatment technologies such as waste water from dyestuff neck
Domain, an anti-clogging antibacterial type charged nanofiltration membrane is chosen first, secures it in pressure vessel formula plate and frame module, then exists
Under magnetic stirrer, waste water is pumped in pressure vessel formula plate and frame module, control waste water from dyestuff flow velocity cause into
The post pressure of sample post maintains 5MPa, and waste water from dyestuff filtration treatment can be completed by receiving permeate after press filtration processing 30min.
Table one：
Remarks：Table one is anti-clogging antibacterial type charged nanofiltration membrane of the embodiment of the present invention and lotus positive electricity composite membrane in waste water from dyestuff
Crystal violet, methyl orange, Coomassie brilliant blue rejection and pure water flux, the contrast table of bacteriostasis rate.
As seen from the above table, anti-clogging antibacterial type charged nanofiltration membrane membrane flux of the present invention is high, and film antipollution is strong, can effectively prevent
Inorganic wastes heap membrane pores block, and suppress the breeding of film surface biological.
Claims (3)
1. a kind of preparation method of anti-clogging antibacterial type charged nanofiltration membrane, it is characterised in that specifically preparation process is：
（1）Take 10~15g silver nitrates to be mixed with 60~70mL deionized waters, the ammonia spirit of 25~30mL mass fractions 10% is added dropwise
And be stirred, obtain silver ammino solution, in mass ratio 1:8, polyvinyl alcohol is added in the sodium hydroxide solution of mass fraction 8%, stirred
Mix and mix to obtain matrix liquid, in mass ratio 3:2, silver ammino solution is added dropwise in matrix liquid, centrifuged after being added dropwise to complete, under collection
Layer precipitation, scrubbed drying, is prepared into nano phase ag_2 o；
（2）Take hectorite to crush and mill, cross 200 mesh sieves and collect to obtain lithium soap stone powder, count in parts by weight, weigh 45~50 parts
Lauryl amine, nano phase ag_2 o, 15~20 parts of tetraethyl orthosilicates and 25~30 parts of lithium soap stone powders of 15~20 parts of above-mentioned preparations stir
Mix and mix to obtain mixed slurry, mixed slurry is poured into mould, stand curing and demolding and blank must be dried, blank will be dried
Milled 200 mesh sieve after roasting, obtain the porous isomery powder of hectorite；
（3）In mass ratio 1:10, the porous isomery powder of hectorite will be dried and mixed with DMA, ultrasonic disperse obtains
Modified dispersion liquid, then count in parts by weight, 45~50 parts of modified dispersion liquids, 15~20 parts of dry polyether sulfones and 1~2 are weighed respectively
Part polyvinylpyrrolidone is stirred, and is filtered to get filtrate, standing and defoaming obtains casting solution, and casting solution is coated to glass plate table
Face, it is 0.15~0.18mm to control coating thickness, is dried after the completion of to be coated, you can it is charged to be prepared into a kind of anti-clogging antibacterial type
NF membrane.
A kind of 2. preparation method of anti-clogging antibacterial type charged nanofiltration membrane according to claim 1, it is characterised in that：
Step（2）Described drying blank sintering temperature is 800~1000 DEG C.
A kind of 3. preparation method of anti-clogging antibacterial type charged nanofiltration membrane according to claim 1, it is characterised in that：
Step（3）Described filtering is filtered using 75~80 mesh filter clothes.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108854587A (en) * | 2018-06-28 | 2018-11-23 | 山东大学 | A kind of high-throughput, antibacterial type doping hectorite-metal ion reverse osmosis composite membrane preparation method |
| CN110038452A (en) * | 2019-04-23 | 2019-07-23 | 东南大学 | Load the ceramic nanofibers base compound purifying film and its preparation method and application of silver |
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