CN105921029A - Technology for preparing composite nanofiltration membrane for water treatment - Google Patents
Technology for preparing composite nanofiltration membrane for water treatment Download PDFInfo
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- CN105921029A CN105921029A CN201610319966.0A CN201610319966A CN105921029A CN 105921029 A CN105921029 A CN 105921029A CN 201610319966 A CN201610319966 A CN 201610319966A CN 105921029 A CN105921029 A CN 105921029A
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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
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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
- 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
- B01D2325/00—Details relating to properties of membranes
- B01D2325/30—Chemical resistance
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Abstract
The invention provides a technology for preparing a composite nanofiltration membrane for water treatment. The selectivity of the prepared nanofiltration membrane can be improved by adjusting the content of polysulfone resin, dichloroethane, chloromethylether and stannic chloride. A membrane is added to hydrochloric acid solution of 1% to be treated for 24-48 h after amination so as to remove redundant ethidene diamine. Through acidproof treatment, the nanofiltration membrane has high separating property and excellent acid resistance. The composite nanofiltration membrane prepared with the technology has the advantages of being high in selectivity and separating property and excellent in acid resistance, and has great market potential and broad prospects.
Description
Technical field
The invention belongs to water treatment technology field, it is more particularly related at a kind of water
The preparation technology of reason composite nanometer filtering film.
Background technology
The aperture of NF membrane at more than 1nm, general 1-2nm.Be allow solvent molecule or some
The functional semipermeable membrane of one of low molecular weight solutes or at a low price ion permeable.It is a kind of special
And up-and-coming separation film kind, it obtains because the size that can retain material is about nanometer
Name, it retains organic molecular weight and is about about 150-500, retains dissolubility salt
Ability is between 2-98%, and the desalination to monovalent anion saline solution is less than high-valence anion salt
Solution.It is used to remove Organic substance and the colourity of surface water, removing underground hardness of water, part
Remove the utility etc. in dissolubility salt, concentrated fruit juice and separation medicine.NF membrane at present
There is solvent resistant and the inadequate problem of acid resistance.
Summary of the invention
Problem to be solved by this invention is to provide the preparation of a kind of water process composite nanometer filtering film
Technique.
To achieve these goals, the technical scheme that the present invention takes is:
(1) preparation of chloromethyl polysulphone
First the polysulfone resin and the dichloroethanes that are fully dried are joined in reaction bulb, and
Stir at a temperature of 30-50 DEG C to being completely dissolved, then chloromethyl ether and butter of tin are mixed
After be slowly added dropwise formation mixed liquor, then mixed liquor is poured in ethanol solution and analyses while stirring
Go out, obtain chloromethyl polysulphone；
(2) preparation of chloromethylation polyether sulfone
The concentrated sulphuric acid of polyethersulfone resin and 98% is joined in reaction bulb, and 30-50 DEG C of temperature
Reaction bulb, to being completely dissolved, is then placed in ice-water bath and is slowly added to ethylenediamine by the lower stirring of degree,
Obtaining reactant liquor, then reactant liquor is poured into Precipitation in mixture of ice and water, cyclic washing is extremely
Neutrality i.e. can get chloromethylation polyether sulfone；
(3) preparation of chloromethylation Phthalazinone polyether sulfone
The concentrated sulphuric acid of Phthalazinone polyethersulfone resin and 98% is joined in reaction bulb, and
Stir at a temperature of 20-40 DEG C to being completely dissolved, be then slowly added to ethylenediamine, obtain reactant liquor,
Then reactant liquor is poured into Precipitation in mixture of ice and water, and cyclic washing is the most available to neutrality
Chloromethylation Phthalazinone polyether sulfone；
(4) pre-treatment of masking
The chloromethyl polysulphone of preparation, chloromethylation polyether sulfone and chloromethylation Phthalazinone are gathered
Ether sulfone is dried 5-6h in vacuum drying oven, and described dry temperature is 100-120 DEG C；
(5) preparation of casting solution
Take dried chloromethyl polysulphone, chloromethylation polyether sulfone and chloromethylation Phthalazinone
Polyether sulfone is placed in reaction bulb with N,N-dimethylacetamide respectively and is stirred, and adds simultaneously
Butanone and anhydrous Lithium chloride continue heated and stirred, until stirring, form chloromethyl polysulphone
Casting solution, chloromethylation polyether sulfone casting solution and chloromethylation Phthalazinone polyether sulfone casting solution,
The time of described heated and stirred is 20-30min；
(6) knifing
Carry out casting solution filtering, deaeration, after standing, with the tape casting by chloromethyl polysulphone
Casting solution, chloromethylation polyether sulfone casting solution and chloromethylation Phthalazinone polyether sulfone casting solution incline
Pour on the glass plate of preheating, then spread to the thin layer of thickness 0.6-0.8um with scraper, then
Thin layer is placed in gel sizing in cold water together with glass plate, forms basement membrane；
(7) preparation of composite nanometer filtering film
The basement membrane obtained is put in the ethylenediamine solution that volume fraction is 20-30%,
Amination 36-60h at 30-50 DEG C, amination takes the film out after terminating, and i.e. obtains composite nanometer filtering film.
Preferably, polysulfone resin in described step (1), dichloroethanes, chloromethyl ether and
The content of butter of tin is 4-6g, 100-200ml, 4-6ml and 0.3-0.4ml.
Preferably, film is joined after amination by described step (7) in the solution of hydrochloric acid of 1%
Process 24-48h.
Preferably, in described step (7), composite nanometer filtering film carries out resistance to acid treatment.
Preferably, composite nanometer filtering film is soaked in the reaction tank fill sodium dodecyl sulfate solution
Bubble 20-28h, then cleans with deionized water, is clipped in masking folder, then toward slow in reaction tank
Slowly add aqueous phase solution so that it is the fully counterdie surface of submergence masking folder, remove after standing 3-5h
Remove aqueous phase solution, then organic phase solution is slowly fallen on film, react 2-4h, finally by film
Sheet is put at heat treatment in baking oven, then repeatedly cleans film surface with deionized water, obtains acidproof
Composite nanometer filtering film.
Preferably, described aqueous phase solution is piperazine, sodium hydroxide, sodium carbonate and sodium bicarbonate,
Described organic phase solution is naphthalene sulfonyl chloride, ethylene glycol monomethyl ether and carbon tetrachloride.
Beneficial effect: the invention provides the preparation technology of a kind of water process composite nanometer filtering film,
The content of described polysulfone resin, dichloroethanes, chloromethyl ether and butter of tin can make made
Standby NF membrane selectivity improves, in the solution of the hydrochloric acid that film joins after described amination 1%
Processing 24-48h, to remove unnecessary ethylenediamine, described composite nanometer filtering film carries out resistance to acid treatment,
NF membrane can be made to be provided simultaneously with good separation performance and excellent acid resistance.This kind is used to prepare
It is excellent that the composite nanometer filtering film that technique prepares has that selectivity is high, good separation is acidproof with excellence
Point, market potential is huge, has a extensive future.
Detailed description of the invention
Embodiment 1:
(1) preparation of chloromethyl polysulphone
First the polysulfone resin and the dichloroethanes that are fully dried are joined in reaction bulb, and
Stir at a temperature of 30 DEG C to being completely dissolved, slow after then chloromethyl ether and butter of tin being mixed
Slow dropping forms mixed liquor, is then poured in ethanol solution by mixed liquor and separates out while stirring,
Obtain chloromethyl polysulphone, described polysulfone resin, dichloroethanes, chloromethyl ether and four chlorinations
The content of stannum is 4g, 100ml, 4ml and 0.3ml；
(2) preparation of chloromethylation polyether sulfone
The concentrated sulphuric acid of polyethersulfone resin and 98% is joined in reaction bulb, and 30 DEG C of temperature
Reaction bulb, to being completely dissolved, is then placed in ice-water bath and is slowly added to ethylenediamine by lower stirring,
To reactant liquor into, then reactant liquor is poured Precipitation in mixture of ice and water, cyclic washing in
Property i.e. can get chloromethylation polyether sulfone；
(3) preparation of chloromethylation Phthalazinone polyether sulfone
The concentrated sulphuric acid of Phthalazinone polyethersulfone resin and 98% is joined in reaction bulb, and
Stir at a temperature of 20 DEG C to being completely dissolved, be then slowly added to ethylenediamine, obtain reactant liquor, so
After pour reactant liquor in mixture of ice and water Precipitation, cyclic washing to neutrality i.e. can get chlorine
Methylate Phthalazinone polyether sulfone；
(4) pre-treatment of masking
The chloromethyl polysulphone of preparation, chloromethylation polyether sulfone and chloromethylation Phthalazinone are gathered
Ether sulfone is dried 5h in vacuum drying oven, and described dry temperature is 100 DEG C；
(5) preparation of casting solution
Take dried chloromethyl polysulphone, chloromethylation polyether sulfone and chloromethylation Phthalazinone
Polyether sulfone is placed in reaction bulb with N,N-dimethylacetamide respectively and is stirred, and adds simultaneously
Butanone and anhydrous Lithium chloride continue heated and stirred, until stirring, form chloromethyl polysulphone
Casting solution, chloromethylation polyether sulfone casting solution and chloromethylation Phthalazinone polyether sulfone casting solution,
The time of described heated and stirred is 20min；
(6) knifing
Carry out casting solution filtering, deaeration, after standing, with the tape casting by chloromethyl polysulphone
Casting solution, chloromethylation polyether sulfone casting solution and chloromethylation Phthalazinone polyether sulfone casting solution incline
Pour on the glass plate of preheating, then spread to the thin layer of thickness 0.6um with scraper, then by thin
Layer is placed in gel sizing in cold water together with glass plate, forms basement membrane；
(7) preparation of composite nanometer filtering film
The basement membrane obtained is put in the ethylenediamine solution that volume fraction is 20%, at 30 DEG C
Lower amination 36h, amination terminates to process in the solution of the hydrochloric acid that caudacoria joins 1% 24h, then
Take the film out, i.e. obtain composite nanometer filtering film；
(8) the resistance to acid treatment of composite nanometer filtering film
Composite nanometer filtering film is soaked in the reaction tank fill sodium dodecyl sulfate solution 20h,
Then clean with deionized water, be clipped in masking folder, then in reaction tank, be slowly added to aqueous phase
Solution so that it is the fully counterdie surface of submergence masking folder, removes aqueous phase solution after standing 3h,
Then organic phase solution is slowly fallen on film, react 2h, finally diaphragm is put in baking oven
At heat treatment, then repeatedly clean film surface with deionized water, obtain acidproof composite nanometer filtering film,
Described aqueous phase solution is piperazine, sodium hydroxide, sodium carbonate and sodium bicarbonate, described organic mixes
Liquid is naphthalene sulfonyl chloride, ethylene glycol monomethyl ether and carbon tetrachloride.
Embodiment 2:
(1) preparation of chloromethyl polysulphone
First the polysulfone resin and the dichloroethanes that are fully dried are joined in reaction bulb, and
Stir at a temperature of 40 DEG C to being completely dissolved, slow after then chloromethyl ether and butter of tin being mixed
Slow dropping forms mixed liquor, is then poured in ethanol solution by mixed liquor and separates out while stirring,
Obtain chloromethyl polysulphone, described polysulfone resin, dichloroethanes, chloromethyl ether and four chlorinations
The content of stannum is 5g, 150ml, 5ml and 0.35ml；
(2) preparation of chloromethylation polyether sulfone
The concentrated sulphuric acid of polyethersulfone resin and 98% is joined in reaction bulb, and 40 DEG C of temperature
Reaction bulb, to being completely dissolved, is then placed in ice-water bath and is slowly added to ethylenediamine by lower stirring,
To reactant liquor into, then reactant liquor is poured Precipitation in mixture of ice and water, cyclic washing in
Property i.e. can get chloromethylation polyether sulfone；
(3) preparation of chloromethylation Phthalazinone polyether sulfone
The concentrated sulphuric acid of Phthalazinone polyethersulfone resin and 98% is joined in reaction bulb, and
Stir at a temperature of 30 DEG C to being completely dissolved, be then slowly added to ethylenediamine, obtain reactant liquor, so
After pour reactant liquor in mixture of ice and water Precipitation, cyclic washing to neutrality i.e. can get chlorine
Methylate Phthalazinone polyether sulfone；
(4) pre-treatment of masking
The chloromethyl polysulphone of preparation, chloromethylation polyether sulfone and chloromethylation Phthalazinone are gathered
Ether sulfone is dried 5.5h in vacuum drying oven, and described dry temperature is 110 DEG C；
(5) preparation of casting solution
Take dried chloromethyl polysulphone, chloromethylation polyether sulfone and chloromethylation Phthalazinone
Polyether sulfone is placed in reaction bulb with N,N-dimethylacetamide respectively and is stirred, and adds simultaneously
Butanone and anhydrous Lithium chloride continue heated and stirred, until stirring, form chloromethyl polysulphone
Casting solution, chloromethylation polyether sulfone casting solution and chloromethylation Phthalazinone polyether sulfone casting solution,
The time of described heated and stirred is 25min；
(6) knifing
Carry out casting solution filtering, deaeration, after standing, with the tape casting by chloromethyl polysulphone
Casting solution, chloromethylation polyether sulfone casting solution and chloromethylation Phthalazinone polyether sulfone casting solution incline
Pour on the glass plate of preheating, then spread to the thin layer of thickness 0.7um with scraper, then by thin
Layer is placed in gel sizing in cold water together with glass plate, forms basement membrane；
(7) preparation of composite nanometer filtering film
The basement membrane obtained is put in the ethylenediamine solution that volume fraction is 25%, at 40 DEG C
Lower amination 48h, amination terminates to process in the solution of the hydrochloric acid that caudacoria joins 1% 36h, then
Take the film out, i.e. obtain composite nanometer filtering film；
(8) the resistance to acid treatment of composite nanometer filtering film
Composite nanometer filtering film is soaked in the reaction tank fill sodium dodecyl sulfate solution, 24h,
Then clean with deionized water, be clipped in masking folder, then in reaction tank, be slowly added to aqueous phase
Solution so that it is the fully counterdie surface of submergence masking folder, removes aqueous phase solution after standing 4h,
Then organic phase solution is slowly fallen on film, react 3h, finally diaphragm is put in baking oven
At heat treatment, then repeatedly clean film surface with deionized water, obtain acidproof composite nanometer filtering film,
Described aqueous phase solution is piperazine, sodium hydroxide, sodium carbonate and sodium bicarbonate, described organic mixes
Liquid is naphthalene sulfonyl chloride, ethylene glycol monomethyl ether and carbon tetrachloride.
Embodiment 3:
(1) preparation of chloromethyl polysulphone
First the polysulfone resin and the dichloroethanes that are fully dried are joined in reaction bulb, and
Stir at a temperature of 50 DEG C to being completely dissolved, slow after then chloromethyl ether and butter of tin being mixed
Slow dropping forms mixed liquor, is then poured in ethanol solution by mixed liquor and separates out while stirring,
Obtain chloromethyl polysulphone, described polysulfone resin, dichloroethanes, chloromethyl ether and four chlorinations
The content of stannum is 6g, 200ml, 6ml and 0.4ml；
(2) preparation of chloromethylation polyether sulfone
The concentrated sulphuric acid of polyethersulfone resin and 98% is joined in reaction bulb, and 50 DEG C of temperature
Reaction bulb, to being completely dissolved, is then placed in ice-water bath and is slowly added to ethylenediamine by lower stirring,
To reactant liquor into, then reactant liquor is poured Precipitation in mixture of ice and water, cyclic washing in
Property i.e. can get chloromethylation polyether sulfone；
(3) preparation of chloromethylation Phthalazinone polyether sulfone
The concentrated sulphuric acid of Phthalazinone polyethersulfone resin and 98% is joined in reaction bulb, and
Stir at a temperature of 40 DEG C to being completely dissolved, be then slowly added to ethylenediamine, obtain reactant liquor, so
After pour reactant liquor in mixture of ice and water Precipitation, cyclic washing to neutrality i.e. can get chlorine
Methylate Phthalazinone polyether sulfone；
(4) pre-treatment of masking
The chloromethyl polysulphone of preparation, chloromethylation polyether sulfone and chloromethylation Phthalazinone are gathered
Ether sulfone is dried 6h in vacuum drying oven, and described dry temperature is 120 DEG C；
(5) preparation of casting solution
Take dried chloromethyl polysulphone, chloromethylation polyether sulfone and chloromethylation Phthalazinone
Polyether sulfone is placed in reaction bulb with N,N-dimethylacetamide respectively and is stirred, and adds simultaneously
Butanone and anhydrous Lithium chloride continue heated and stirred, until stirring, form chloromethyl polysulphone
Casting solution, chloromethylation polyether sulfone casting solution and chloromethylation Phthalazinone polyether sulfone casting solution,
The time of described heated and stirred is 30min；
(6) knifing
Carry out casting solution filtering, deaeration, after standing, with the tape casting by chloromethyl polysulphone
Casting solution, chloromethylation polyether sulfone casting solution and chloromethylation Phthalazinone polyether sulfone casting solution incline
Pour on the glass plate of preheating, then spread to the thin layer of thickness 0.8um with scraper, then by thin
Layer is placed in gel sizing in cold water together with glass plate, forms basement membrane；
(7) preparation of composite nanometer filtering film
The basement membrane obtained is put in the ethylenediamine solution that volume fraction is 30%, at 50 DEG C
Lower amination 60h, amination terminates to process 48h then in the solution of the hydrochloric acid that caudacoria joins 1%
Take the film out, i.e. obtain composite nanometer filtering film；
(8) the resistance to acid treatment of composite nanometer filtering film
Composite nanometer filtering film is soaked in the reaction tank fill sodium dodecyl sulfate solution 28h,
Then clean with deionized water, be clipped in masking folder, then in reaction tank, be slowly added to aqueous phase
Solution so that it is the fully counterdie surface of submergence masking folder, removes aqueous phase solution after standing 5h,
Then organic phase solution is slowly fallen on film, react 4h, finally diaphragm is put in baking oven
At heat treatment, then repeatedly clean film surface with deionized water, obtain acidproof composite nanometer filtering film,
Described aqueous phase solution is piperazine, sodium hydroxide, sodium carbonate and sodium bicarbonate, described organic mixes
Liquid is naphthalene sulfonyl chloride, ethylene glycol monomethyl ether and carbon tetrachloride.
After process above, taking out sample respectively, measurement result is as follows:
Can draw according to above table data, when embodiment 2 parameter, compound after technique is received
Filter membrane prepare than prior art after the sour transmitance of composite nanometer filtering film is high and solvent removal rate
Height, is now more beneficial for the preparation of NF membrane.
The invention provides the preparation technology of a kind of water process composite nanometer filtering film, described polysulfones tree
The content of fat, dichloroethanes, chloromethyl ether and butter of tin can make prepared NF membrane
Selectivity improves, and processes 24-48h in the solution of the hydrochloric acid that film joins after described amination 1%,
To remove unnecessary ethylenediamine, described composite nanometer filtering film carries out resistance to acid treatment, can make NF membrane
It is provided simultaneously with good separation performance and excellent acid resistance.This kind of preparation technology is used to prepare
Composite nanometer filtering film there is the advantage that selectivity is high, good separation is acidproof with excellence, market potential
Huge, have a extensive future.
The foregoing is only embodiments of the invention, not thereby limit the patent model of the present invention
Enclose, every equivalent structure utilizing description of the invention content to be made or equivalence flow process conversion, or
Directly or indirectly it is used in other relevant technical fields, is the most in like manner included in the patent of the present invention
In protection domain.
Claims (6)
1. the preparation technology of a water process composite nanometer filtering film, it is characterised in that include as
Lower step:
(1) preparation of chloromethyl polysulphone
First the polysulfone resin and the dichloroethanes that are fully dried are joined in reaction bulb, and
Stir at a temperature of 30-50 DEG C to being completely dissolved, then chloromethyl ether and butter of tin are mixed
After be slowly added dropwise formation mixed liquor, then mixed liquor is poured in ethanol solution and analyses while stirring
Go out, obtain chloromethyl polysulphone；
(2) preparation of chloromethylation polyether sulfone
The concentrated sulphuric acid of polyethersulfone resin and 98% is joined in reaction bulb, and 30-50 DEG C of temperature
Reaction bulb, to being completely dissolved, is then placed in ice-water bath and is slowly added to ethylenediamine by the lower stirring of degree,
Obtaining reactant liquor, then reactant liquor is poured into Precipitation in mixture of ice and water, cyclic washing is extremely
Neutrality i.e. can get chloromethylation polyether sulfone；
(3) preparation of chloromethylation Phthalazinone polyether sulfone
The concentrated sulphuric acid of Phthalazinone polyethersulfone resin and 98% is joined in reaction bulb, and
Stir at a temperature of 20-40 DEG C to being completely dissolved, be then slowly added to ethylenediamine, obtain reactant liquor,
Then reactant liquor is poured into Precipitation in mixture of ice and water, and cyclic washing is the most available to neutrality
Chloromethylation Phthalazinone polyether sulfone；
(4) pre-treatment of masking
The chloromethyl polysulphone of preparation, chloromethylation polyether sulfone and chloromethylation Phthalazinone are gathered
Ether sulfone is dried 5-6h in vacuum drying oven, and described dry temperature is 100-120 DEG C；
(5) preparation of casting solution
Take dried chloromethyl polysulphone, chloromethylation polyether sulfone and chloromethylation Phthalazinone
Polyether sulfone is placed in reaction bulb with N,N-dimethylacetamide respectively and is stirred, and adds simultaneously
Butanone and anhydrous Lithium chloride continue heated and stirred, until stirring, form chloromethyl polysulphone
Casting solution, chloromethylation polyether sulfone casting solution and chloromethylation Phthalazinone polyether sulfone casting solution,
The time of described heated and stirred is 20-30min；
(6) knifing
Carry out casting solution filtering, deaeration, after standing, with the tape casting by chloromethyl polysulphone
Casting solution, chloromethylation polyether sulfone casting solution and chloromethylation Phthalazinone polyether sulfone casting solution incline
Pour on the glass plate of preheating, then spread to the thin layer of thickness 0.6-0.8um with scraper, then
Thin layer is placed in gel sizing in cold water together with glass plate, forms basement membrane；
(7) preparation of composite nanometer filtering film
The basement membrane obtained is put in the ethylenediamine solution that volume fraction is 20-30%,
Amination 36-60h at 30-50 DEG C, amination takes the film out after terminating, and i.e. obtains composite nanometer filtering film.
2. according to the preparation technology of a kind of water process composite nanometer filtering film described in claim 1,
It is characterized in that: polysulfone resin in described step (1), dichloroethanes, chloromethyl ether and
The content of butter of tin is 4-6g, 100-200ml, 4-6ml and 0.3-0.4ml.
3. according to the preparation technology of a kind of water process composite nanometer filtering film described in claim 1,
It is characterized in that: in the solution of the hydrochloric acid that after amination, film is joined in described step (7) 1%
Process 24-48h.
4. according to the preparation technology of a kind of water process composite nanometer filtering film described in claim 1,
It is characterized in that: in described step (7), composite nanometer filtering film carries out resistance to acid treatment.
5. according to the preparation technology of a kind of water process composite nanometer filtering film described in claim 4,
It is characterized in that: composite nanometer filtering film is soaked in the reaction tank fill sodium dodecyl sulfate solution
Bubble 20-28h, then cleans with deionized water, is clipped in masking folder, then toward slow in reaction tank
Slowly add aqueous phase solution so that it is the fully counterdie surface of submergence masking folder, remove after standing 3-5h
Remove aqueous phase solution, then organic phase solution is slowly fallen on film, react 2-4h, finally by film
Sheet is put at heat treatment in baking oven, then repeatedly cleans film surface with deionized water, obtains acidproof
Composite nanometer filtering film.
6. according to the preparation technology of a kind of water process composite nanometer filtering film described in claim 5,
It is characterized in that: described aqueous phase solution is piperazine, sodium hydroxide, sodium carbonate and sodium bicarbonate,
Described organic phase solution is naphthalene sulfonyl chloride, ethylene glycol monomethyl ether and carbon tetrachloride.
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| CN107158975A (en) * | 2017-06-01 | 2017-09-15 | 江苏天和制药有限公司 | A kind of positively charged nanofiltration membranes and preparation method thereof |
| CN108579472A (en) * | 2018-03-30 | 2018-09-28 | 冯婷婷 | A kind of separatory amphoteric ion membrane preparation method of biological medicine |
| CN108579472B (en) * | 2018-03-30 | 2021-10-22 | 安康市宝杰植化有限公司 | Preparation method of zwitterionic membrane for biomedical separation |
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Application publication date: 20160907 |