CN105457506A - Anti-oxidation ultrafiltration membrane and preparation method thereof - Google Patents
Anti-oxidation ultrafiltration membrane and preparation method thereof Download PDFInfo
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- CN105457506A CN105457506A CN201610019502.8A CN201610019502A CN105457506A CN 105457506 A CN105457506 A CN 105457506A CN 201610019502 A CN201610019502 A CN 201610019502A CN 105457506 A CN105457506 A CN 105457506A
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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
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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
- B01D67/0009—Organic membrane manufacture by phase separation, sol-gel transition, evaporation or solvent quenching
- B01D67/0013—Casting processes
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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
- B01D2325/00—Details relating to properties of membranes
- B01D2325/30—Chemical resistance
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Abstract
The invention discloses an anti-oxidation ultrafiltration membrane and a preparation method thereof and belongs to the field of material preparation. The anti-oxidation ultrafiltration membrane is prepared from, by mass, 100 parts of PVDF powder, 40-60 parts of a solvent and 0.5-1 part of an anti-oxidation agent. The anti-oxidation agent is obtained through a reaction of dendritic polyethylene imine, long-chain alkyl amine substance and a phenol or ester compound. The long-chain alkyl amine substance in the anti-oxidation ultrafiltration membrane can neutralize and adsorb HC1 released in the PVDF decomposition process, and carries out an addition reaction with double bonds formed through PVDF decomposition, and therefore the anti-oxidation performance of PVDF materials is improved.
Description
Technical field
The invention belongs to field of material preparation, more particularly, relate to a kind of resistance to oxidation milipore filter and preparation method thereof.
Background technology
The maximum milipore filter of current employing is PVDF material.What conventional film materials industry promoted is hydrophily and the high flux of film, but day by day improves along with water quality requirement and recycle-water ratio, and the materialized pretreatment means such as oxidation, also in continuous reinforcement, cause the oxidative resistance requirement of milipore filter also more and more higher.
At present, existing document and patent report by adding oxidation resistant material in PVDF material, thus reach the object improving film oxidation resistent susceptibility.Such as, Chinese Patent Application No. is CN201310097069, and application publication date is that the patent application document of on 03 25th, 2013 discloses a kind of polyvinyl alcohol formal layer and poly-bipropenyl phthalic acid ester layer promotes membrane material antioxidant performance.Chinese Patent Application No. is CN200910220545, and application publication date is that the patent application document (publication number CN101721927B) on December 01st, 2009 discloses a kind of doping naphthyridine ketone structure copolymerization aryl ether sulfone lifting membrane material antioxidant performance.Chinese Patent Application No. is CN200510011473, and application publication date is that the patent application document (publication number CN1695778B) of on 03 25th, 2005 discloses a kind of doping polyether sulphone or PAEK promotes membrane material antioxidant performance.
But the composite antioxidant of dendroid of adulterating in PVDF polymine, chain alkyl amine substance and phenols or ester type compound, the method preparing resistance to oxidation milipore filter have not been reported.
Summary of the invention
1. the problem that will solve
For the problem that existing milipore filter is oxidizable in the use procedure of high oxidative water body, the invention provides a kind of resistance to oxidation milipore filter and preparation method thereof.
2. technical scheme
In order to solve the problems of the prior art, the key component of the raw material of the milipore filter prepared by the present invention comprises PVDF powder, solvent and antioxidant, and particularly, technical scheme of the present invention is as follows:
A kind of resistance to oxidation milipore filter, the parts by weight of the key component and each key component of preparing the raw material of this resistance to oxidation milipore filter are: PVDF powder: 100 parts; Solvent: 40-60 part; Antioxidant: 0.5-1 part.
Preferably, described solvent is one or more in dimethylacetylamide, dimethyl formamide, dimethyl sulfoxide (DMSO) or 1-METHYLPYRROLIDONE.
Preferably, described antioxidant is formed by monomer A, monomers B and monomer C copolymerzation with cross-linking, and wherein monomer A is dendroid polymine; Monomers B is chain alkyl amine substance; Monomer C is phenols or ester type compound.
Preferably, the structural formula of described dendroid polymine is:
Wherein, n is 100-1000, and the molecular weight of dendroid polymine is 50000-500000.
Preferably, the structural formula of described chain alkyl amine substance is:
In formula, m is 10-12, R is methyl or ethyl, and X is halogens.
Preferably, described chain alkyl amine substance is one or more in DTAC, DTAB, dodecyl dimethyl ethyl phosphonium bromide ammonium, dodecyldimethylamine base ethyl phosphonium bromide ammonium, dodecyldimethylamine base ethyl ammonium chloride, tridecyl trimethylammonium bromide etc.; Described monomer C is that butylhydroxy fennel phenol, tetrapentaerythritol ester and the tert-butyl group are to the one in two benzenediols.
The preparation method of above-mentioned a kind of resistance to oxidation milipore filter, concrete preparation process is:
(1) in proportion antioxidant is prepared in monomer A, monomers B and monomer C reaction;
(2) in proportion PVDF powder is dissolved in solvent, adds antioxidant, stir, after deaeration slaking, adopt traditional phase transition method by casting solution leave standstill, gel, knifing, can polyvinylidene fluoride (PVDF) ultrafiltration membrane be synthesized.
Preferably, in step (1), the preparation method of antioxidant is: by monomer A, monomers B and monomer C polymerization reaction take place in a kettle., reaction temperature is 40 ~ 80 DEG C, and the reaction time is 24 ~ 48h; Reaction terminates rear decompression distillation and can obtain described antioxidant.
Preferably, the mol ratio of monomer A, monomers B and monomer C is 1:(0.1-0.4): (0.01-0.05).
Polymine (PEI) is a kind of macromolecule organic, usually has linearity and dendroid two kinds of forms, is one of maximum family macromolecule organic matter of positive charge density; Simultaneously dendritic structure can play the effect of crosslinking agent, can form high crosslinked space net structure, this structural molecule amount is large, stable performance, not easily to run off, can stably be present in PVDF with other macromolecule.But at present, bibliographical information is there is not yet by being applied in the preparation of PVDF ultrafiltration membrane by this for PEI dendrimer crosslinking agent, antioxidant dendroid polymine and chain alkyl amine substance and phenols or ester type compound reaction being prepared a kind of space height cross-linked structure of the present invention's original creation, and this antioxidant is prepared a kind of sludge proof milipore filter as the additive of milipore filter.It is simple that the modification PVDF ultrafiltration membrane of synthesizing in the present invention has preparation process, and needed raw material kind is few, product percent of pass advantages of higher, and its oxidation resistent susceptibility is obvious simultaneously.
3. beneficial effect
(1) the present invention synthesis antioxidant be space height cross-linked structure, can be stable be present in PVDF, not easily run off, there is good oxidation resistent susceptibility;
(2) in the antioxidant of the present invention's synthesis, long chain alkane amine substance can neutralize and adsorb the HCl discharged in PVDF decomposable process, and carries out addition reaction with the double bond formed, thus improves the antioxygenic property of PVDF material;
(3) the C=C double bond produced in building-up process of the present invention and and phenols functional group can also absorb the harmful energy with masked segment ultraviolet region, catch by the living radical of ultraviolet excitation, quencher excited state molecule, decompose the peroxide that ultraviolet light produces, therefore, resistance to oxidation aeration flexible pipe of the present invention has the advantages such as oxidation resistance is strong, long service life;
(4) the resistance to oxidation milipore filter synthesis technique prepared by the present invention is simple, and raw material is cheap and easy to get, and yield rate is high, function admirable, environmental protection.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described further.
Embodiment 1
A kind of preparation method of resistance to oxidation milipore filter is:
Step (1): example is that the PEI of 50000-100000 scope (is mixed with the aqueous solution after weighing for 1:0.1:0.01 gets molecular weight in molar ratio, hereinafter referred to as PEI solution), DTAB and butylhydroxy fennel phenol, DTAB and butylhydroxy fennel phenol are placed in reactor, slowly drip PEI solution wherein, be heated to 80 DEG C of hybrid reaction 24h, after reaction terminates, obtain antioxidant by decompression distillation;
Step (2): get PVDF powder: 100 parts; Solvent dimethylacetylamide: 40 parts; Antioxidant: 0.5 part, stir, after deaeration slaking, adopt traditional phase transition method by casting solution leave standstill, gel, knifing, resistance to oxidation polyvinylidene fluoride (PVDF) ultrafiltration membrane can be synthesized.
The resistance to oxidation milipore filter prepared in the present embodiment is used for oxidation test, and resistance to oxidation milipore filter being positioned over chlorine residue is run 90 days in the recycle-water of 10000mg/L, and membrane flux reduces by 1%, shows that the antioxygenic property of resistance to oxidation milipore filter is good.
Embodiment 2
Other condition of this example is with embodiment 1, and difference is:
In step (1), example is that the PEI of 100000-500000 scope (is mixed with the aqueous solution after weighing for 1:0.2:0.03 gets molecular weight in molar ratio, hereinafter referred to as PEI solution), DTAB and tetrapentaerythritol ester, DTAB and tetrapentaerythritol ester are placed in reactor, slowly drip PEI solution wherein, be heated to 40 DEG C of hybrid reaction 48h, after reaction terminates, obtain antioxidant by decompression distillation;
Step (2) gets PVDF powder: 100 parts; Solvent dimethylformamide: 60 parts; Antioxidant: 1 part, stir, after deaeration slaking, adopt traditional phase transition method by casting solution leave standstill, gel, knifing, resistance to oxidation polyvinylidene fluoride (PVDF) ultrafiltration membrane can be synthesized.
The resistance to oxidation milipore filter prepared in the present embodiment is used for oxidation test, and resistance to oxidation milipore filter being positioned over chlorine residue is run 70 days in the recycle-water of 15000mg/L, and membrane flux reduces by 0.8%, shows that the antioxygenic property of resistance to oxidation milipore filter is good.
Embodiment 3
Other condition of this example is with embodiment 1, and difference is:
In step (1), example is that the PEI of 300000-500000 scope (is mixed with the aqueous solution after weighing for 1:0.4:0.05 gets molecular weight in molar ratio, hereinafter referred to as PEI solution), dodecyl dimethyl ethyl phosphonium bromide ammonium and the tert-butyl group be to two benzenediols, dodecyl dimethyl ethyl phosphonium bromide ammonium and the tert-butyl group are placed in reactor to two benzenediols, slowly drip PEI solution wherein, be heated to 50 DEG C of hybrid reaction 36h, after reaction terminates, can antioxidant be obtained by decompression distillation;
Step (2) gets PVDF powder: 100 parts; Solvent (dimethyl sulfoxide (DMSO): 1-METHYLPYRROLIDONE=1:1): 60 parts; Antioxidant: 0.6 part, stir, after deaeration slaking, adopt traditional phase transition method by casting solution leave standstill, gel, knifing, resistance to oxidation polyvinylidene fluoride (PVDF) ultrafiltration membrane can be synthesized.
The resistance to oxidation milipore filter prepared in the present embodiment is used for oxidation test, and resistance to oxidation milipore filter being positioned over chlorine residue is run 80 days in the recycle-water of 12000mg/L, and membrane flux reduces by 0.9%, shows that the antioxygenic property of resistance to oxidation milipore filter is good.
Embodiment 4
Other condition of this example is with embodiment 1, and difference is:
In step (1), example is that the PEI of 400000-500000 scope (is mixed with the aqueous solution after weighing for 1:0.2:0.02 gets molecular weight in molar ratio, hereinafter referred to as PEI solution), dodecyldimethylamine base ethyl tertiary amine and the tert-butyl group be to two benzenediols, dodecyldimethylamine base ethyl phosphonium bromide ammonium and the tert-butyl group are placed in reactor to two benzenediols, slowly drip PEI solution wherein, be heated to 45 DEG C of hybrid reaction 42h, after reaction terminates, can antioxidant be obtained by decompression distillation;
Step (2) gets PVDF powder: 100 parts; Solvent dimethyl sulfoxide (DMSO): 50 parts; Antioxidant: 0.7 part, stir, after deaeration slaking, adopt traditional phase transition method by casting solution leave standstill, gel, knifing, resistance to oxidation polyvinylidene fluoride (PVDF) ultrafiltration membrane can be synthesized.
The resistance to oxidation milipore filter prepared in the present embodiment is used for oxidation test, and resistance to oxidation milipore filter being positioned over chlorine residue is run 100 days in the recycle-water of 11000mg/L, and membrane flux reduces by 0.6%, shows that the antioxygenic property of resistance to oxidation milipore filter is good.
Embodiment 5
Other condition of this example is with embodiment 1, and difference is:
In step (1), example is that the PEI of 50000-500000 scope (is mixed with the aqueous solution after weighing for 1:0.1:0.02 gets molecular weight in molar ratio, hereinafter referred to as PEI solution), dodecyldimethylamine base ethyl ammonium chloride and tetrapentaerythritol ester, dodecyldimethylamine base ethyl ammonium chloride and tetrapentaerythritol ester are placed in reactor, slowly drip PEI solution wherein, be heated to 52 DEG C of hybrid reaction 28h, after reaction terminates, can antioxidant be obtained by decompression distillation;
Step gets PVDF powder in (2): 100 parts; Solvent N-methyl pyrilidone: 60 parts; Antioxidant: 0.5 part, stir, after deaeration slaking, adopt traditional phase transition method by casting solution leave standstill, gel, knifing, resistance to oxidation polyvinylidene fluoride (PVDF) ultrafiltration membrane can be synthesized.
The resistance to oxidation milipore filter prepared in the present embodiment is used for oxidation test, and resistance to oxidation milipore filter being positioned over chlorine residue is run 90 days in the recycle-water of 16000mg/L, and membrane flux reduces by 1%, shows that the antioxygenic property of resistance to oxidation milipore filter is good.
Embodiment 6
Other condition of this example is with embodiment 1, and difference is:
In step (1), example is that the PEI of 400000-500000 scope (is mixed with the aqueous solution after weighing for 1:0.3:0.04 gets molecular weight in molar ratio, hereinafter referred to as PEI solution), dodecyldimethylamine base ethyl phosphonium bromide ammonium and tridecyl trimethylammonium bromide mixture, tetrapentaerythritol ester, by dodecyldimethylamine base ethyl phosphonium bromide ammonium and tridecyl trimethylammonium bromide mixture, tetrapentaerythritol ester is placed in reactor, slowly drip PEI solution wherein, be heated to 45 DEG C of hybrid reaction 42h, wherein, dodecyldimethylamine base ethyl phosphonium bromide ammonium and tridecyl trimethylammonium bromide molar ratio are 1:1, antioxidant can be obtained by decompression distillation after reaction terminates,
Step gets PVDF powder in (2): 100 parts; Solvent N-methyl pyrilidone: 50 parts; Antioxidant: 0.6 part, stir, after deaeration slaking, adopt traditional phase transition method by casting solution leave standstill, gel, knifing, resistance to oxidation polyvinylidene fluoride (PVDF) ultrafiltration membrane can be synthesized.
The resistance to oxidation milipore filter prepared in the present embodiment is used for oxidation test, and resistance to oxidation milipore filter being positioned over chlorine residue is run 70 days in the recycle-water of 14000mg/L, and membrane flux reduces by 0.6%, shows that the antioxygenic property of resistance to oxidation milipore filter is good.
Claims (10)
1. a resistance to oxidation milipore filter, is characterized in that: the parts by weight of the key component and each key component of preparing the raw material of described resistance to oxidation milipore filter are: PVDF powder: 100 parts; Solvent: 40-60 part; Antioxidant: 0.5-1 part.
2. a kind of resistance to oxidation milipore filter according to claim 1, is characterized in that: described solvent is one or more the mixing in dimethylacetylamide, dimethyl formamide, dimethyl sulfoxide (DMSO) or 1-METHYLPYRROLIDONE; Described antioxidant is formed by monomer A, monomers B and monomer C copolymerzation with cross-linking; Described monomer A is dendroid polymine; Described monomers B is chain alkyl amine substance; Described monomer C is phenols or ester type compound.
3. a kind of resistance to oxidation milipore filter according to claim 2, is characterized in that: the structural formula of described dendroid polymine is:
Wherein, n is 100-1000, and the molecular weight of described dendroid polymine is 50000-500000.
4. a kind of resistance to oxidation milipore filter according to claim 2, is characterized in that: the structural formula of described chain alkyl amine substance is:
In formula, m is 10-12, R is methyl or ethyl, and X is halogens.
5. a kind of resistance to oxidation milipore filter according to claim 4, is characterized in that: described chain alkyl amine substance is one or more in DTAC, DTAB, dodecyl dimethyl ethyl phosphonium bromide ammonium, dodecyldimethylamine base ethyl phosphonium bromide ammonium, dodecyldimethylamine base ethyl ammonium chloride, tridecyl trimethylammonium bromide etc.
6. a kind of resistance to oxidation milipore filter according to claim 2, is characterized in that: described monomer C is that butylhydroxy fennel phenol, tetrapentaerythritol ester or the tert-butyl group are to the one in two benzenediols.
7. a kind of resistance to oxidation milipore filter according to right 1 to 6, is characterized in that: it is run 70-100 days in the recycle-water of 10000-16000mg/L that described resistance to oxidation milipore filter is placed on chlorine residue, and membrane flux reduces 0.6%-1%.
8. a preparation method for resistance to oxidation milipore filter, main preparation process is:
(1) in proportion antioxidant is prepared in monomer A, monomers B and monomer C reaction;
(2) getting 100 parts of Kynoar powders is dissolved in 40-60 part solvent, get antioxidant 0.5-1 part that step (1) is obtained, stir, after deaeration slaking, adopt traditional phase transition method by casting solution leave standstill, gel, knifing, can polyvinylidene fluoride (PVDF) ultrafiltration membrane be synthesized.
9. the preparation method of a kind of resistance to oxidation milipore filter according to claim 8, it is characterized in that: in step (1), the preparation method of antioxidant is: by monomer A, monomers B and monomer C polymerization reaction take place in a kettle., reaction temperature is 40 ~ 80 DEG C, and the reaction time is 24 ~ 48h; Reaction terminates rear decompression distillation and can obtain described antioxidant.
10. the preparation method of a kind of resistance to oxidation milipore filter according to claim 9, is characterized in that: the mol ratio of monomer A, monomers B and monomer C is 1:(0.1-0.4): (0.01-0.05).
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| CN201610019502.8A CN105457506B (en) | 2016-01-12 | 2016-01-12 | A kind of resistance to oxidation milipore filter and preparation method thereof |
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| CN201610019502.8A CN105457506B (en) | 2016-01-12 | 2016-01-12 | A kind of resistance to oxidation milipore filter and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1695778A (en) * | 2005-03-25 | 2005-11-16 | 清华大学 | Ultrafiltration membrane of hollow fiber made form polyarylether sulfone or polyarylether ketone of containing phenolphthalein lateral group, and preparation method |
| US20060049102A1 (en) * | 2004-09-03 | 2006-03-09 | Miller Jeffrey T | Ionic polymer membranes |
| CN104174299A (en) * | 2014-07-30 | 2014-12-03 | 中国海洋大学 | High-flux positive osmosis membrane based on ultrathin support layer and preparation method thereof |
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- 2016-01-12 CN CN201610019502.8A patent/CN105457506B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060049102A1 (en) * | 2004-09-03 | 2006-03-09 | Miller Jeffrey T | Ionic polymer membranes |
| CN1695778A (en) * | 2005-03-25 | 2005-11-16 | 清华大学 | Ultrafiltration membrane of hollow fiber made form polyarylether sulfone or polyarylether ketone of containing phenolphthalein lateral group, and preparation method |
| CN104174299A (en) * | 2014-07-30 | 2014-12-03 | 中国海洋大学 | High-flux positive osmosis membrane based on ultrathin support layer and preparation method thereof |
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