CN105879714A - Anti-pollution hollow fiber ultrafiltration membrane and preparation process thereof - Google Patents
Anti-pollution hollow fiber ultrafiltration membrane and preparation process thereof Download PDFInfo
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- CN105879714A CN105879714A CN201410668935.7A CN201410668935A CN105879714A CN 105879714 A CN105879714 A CN 105879714A CN 201410668935 A CN201410668935 A CN 201410668935A CN 105879714 A CN105879714 A CN 105879714A
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- polymer
- hollow fiber
- ultrafiltration membrane
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- tetraethyl orthosilicate
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Abstract
The invention relates to an anti-pollution hollow fiber ultrafiltration membrane, in particular to a tetraethyl orthosilicate/polymer blended hollow fiber ultrafiltration membrane which is the anti-pollution hollow fiber ultrafiltration membrane obtained by blending an ethanol solution of tetraethyl orthosilicate and a polymer solution and then carrying out a high-temperature phase inversion method. The anti-pollution hollow fiber ultrafiltration membrane is characterized in that a three-dimensional interpenetrating network in which the polymer and the tetraethyl orthosilicate are microcrosslinked is formed during the high-temperature phase inversion process, wherein the polymer is one or two of polysulfone, poly(phthalazinone ether sulfone ketone) and poly(phthalazinone ether ether ketone); a solvent is one of dimethyl acetamide (DMAC), dimethyl formamide (DMF) and dimethyl sulfoxide (DMSO); a pore-forming agent is polyethylene glycol (PEG) of different molecular weights; and the mass fraction of the polymer is 15-25%, the mass fraction of the tetraethyl orthosilicate is 1-5%, the mass fraction of ethanol is 1-5%, the mass fraction of the solvent is 55-65%, and the mass fraction of the pore-forming agent is 10-15%. The tetraethyl orthosilicate/polymer blended hollow fiber ultrafiltration membrane has a permanent hydrophilic property and can resist biological pollution.
Description
Technical field
The present invention relates to technical field of membrane, relate to a kind of antipollution hollow fiber ultrafiltration membrane and preparation technology thereof.
Background technology
Hollow fiber ultrafiltration membrane is a kind of threadiness, has the film of self-supporting effect, is the one of anisotropic membrane.Hollow Fiber Ultrafiltration
Film has that packed density is big, floor space is little, flux is big, low power consumption and other advantages, is widely used in water process, pharmacy, food, change
The fields such as work.
Existing hollow fiber ultrafiltration membrane has the disadvantage that easily pollution, and flux decline speed is fast.
Cubic network can be formed after tetraethyl orthosilicate crosslinking, containing substantial amounts of hydroxyl, as being used for preparing hollow-fibre membrane, film can be improved
Hydrophilic and fracture strength, be efficiently modified contamination resistance and the toughness of hollow-fibre membrane.
Summary of the invention
For the existing shortcoming that hollow-fibre membrane resistance tocrocking is poor, fracture strength is low, the present invention provides a kind of tetraethyl orthosilicate/polymerization
Thing its mixed hollow fiber ultrafiltration membrane and technology of preparing thereof.Technical solutions according to the invention are:
1. an antipollution hollow fiber ultrafiltration membrane, specially tetraethyl orthosilicate/polymer blending hollow fiber ultrafiltration membrane, be by just
After the ethanol solution of silester and polymer solution blend, through the hollow fiber ultrafiltration membrane that high-temperature-phase conversion method obtains.Its feature exists
In: in high-temperature-phase conversion process, form the three-dimensional interpenetrating networks of polymer and the micro-crosslinking of tetraethyl orthosilicate.Wherein, described polymer
For one or both in polysulfones, inbred group breeding and Phthalazinone polyether-ether-ketone；Described solvent is dimethyl acetylamide
(DMAC), the one in dimethylformamide (DMF) and dimethyl sulfoxide (DMSO)；Described porogen is different molecular weight
Polyethylene Glycol (PEG).The mass fraction of polymer is 15-25%, and the mass fraction 1-5% of tetraethyl orthosilicate, ethanol mass fraction are
1-5%, the mass fraction of solvent is 55-65%, and porogen mass fraction is 10-15%.
The preparation method of a kind of antipollution hollow fiber ultrafiltration membrane, comprises the steps:
1) a certain amount of tetraethyl orthosilicate is dissolved in ethanol, obtains solution A.
2) a certain amount of polymer and porogen are dissolved in solvent (DMAC, DMF, DMSO), obtain solution B.
3) a certain amount of solution A and solution B are mixed to get casting solution.
4) casting solution described in is extruded by spinneret, enters in coagulating bath (100 DEG C), by inversion of phases formed tetraethyl orthosilicate/
Polymer blending hollow fiber ultrafiltration membrane, in this film, polymer and tetraethyl orthosilicate form three-dimensional interpenetrating networks.
2. compared with existing hollow fiber ultrafiltration membrane, tetraethyl orthosilicate of the present invention/polymer blending hollow fiber ultrafiltration membrane tool
There is permanent hydrophilic, can stable against biological contamination.
3., compared with tradition room temperature phase inversion, what high-temperature-phase conversion method of the present invention obtained tetraethyl orthosilicate/polymer is common
Mixed hollow fiber ultrafiltration membrane has three-dimensional inierpeneirating network structure, can be effectively improved the fracture strength of film.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further detail.
Embodiment
It is that 8% tetraethyl orthosilicate is dissolved in ethanol by mass fraction, obtains solution A；Mass fraction 20% polymer and 12% are caused
Hole agent is dissolved in 60%DMAC solvent, obtains solution B, and solution A obtains casting solution after mixing homogeneously with solution B.
By casting solution in spinneret enters coagulating bath (100 DEG C), form tetraethyl orthosilicate/polymer by inversion of phases and hollow is blended
Fiber ultrafiltration membrane.Test pure water flux and attenuation rate, the weight average molecular weight using deionized water preparation mass fraction to be 0.2% is
68000 bovine serum albumen solution.Testing result: pure water flux 530L m-2·h-1, attenuation rate is 10.43%.
Comparative example:
By mass fraction be 8% ethanol be solution A；Mass fraction 20% polymer and 12% porogen are dissolved in 60%DMAC solvent
In, obtain solution B.Solution A obtains casting solution after mixing homogeneously with solution B.
By casting solution in spinneret enters coagulating bath (100 DEG C), form tetraethyl orthosilicate/polymer by inversion of phases and hollow is blended
Fiber ultrafiltration membrane.Test pure water flux and attenuation rate, the weight average molecular weight using deionized water preparation mass fraction to be 0.2% is
68000 bovine serum albumen solution.Testing result: pure water flux 498L m-2·h-1, attenuation rate is 36.08%.
Finding out from above-mentioned correction data, the antipollution hollow fiber ultrafiltration membrane water flux prepared by the method for the present invention is improved, decay
Rate reduces substantially, improves the contamination resistance of hollow fiber ultrafiltration membrane.
Claims (4)
1. an antipollution hollow fiber ultrafiltration membrane, specially tetraethyl orthosilicate/polymer blending hollow fiber ultrafiltration membrane.It is characterized in that: polymer and the three-dimensional interpenetrating networks of the micro-crosslinking of tetraethyl orthosilicate.
2., according to claim 1, described polymer is the one in polysulfones, inbred group breeding and Phthalazinone polyether-ether-ketone；Described solvent is the one in dimethyl acetylamide (DMAC), dimethylformamide (DMF) and dimethyl sulfoxide (DMSO)；Described porogen is the Polyethylene Glycol (PEG) of different molecular weight.
3., according to claim 1, the mass fraction of described polymer is the mass fraction 1-5% of 15-25% tetraethyl orthosilicate, ethanol mass fraction is 1-5%, and the mass fraction of solvent is 55-65%, and porogen mass fraction is 10-15%.
4. according to claim 1, described preparation method: tetraethyl orthosilicate is dissolved in ethanol, obtains solution A；Polymer and porogen are dissolved in solvent (DMAC, DMF, DMSO), obtain solution B；Solution A and solution B are mixed to get casting solution.Casting solution is extruded by spinneret, enters in coagulating bath (100 DEG C), forms tetraethyl orthosilicate/polymer blending hollow fiber ultrafiltration membrane by inversion of phases.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410668935.7A CN105879714A (en) | 2014-11-17 | 2014-11-17 | Anti-pollution hollow fiber ultrafiltration membrane and preparation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410668935.7A CN105879714A (en) | 2014-11-17 | 2014-11-17 | Anti-pollution hollow fiber ultrafiltration membrane and preparation process thereof |
Publications (1)
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| CN105879714A true CN105879714A (en) | 2016-08-24 |
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| CN201410668935.7A Pending CN105879714A (en) | 2014-11-17 | 2014-11-17 | Anti-pollution hollow fiber ultrafiltration membrane and preparation process thereof |
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Cited By (2)
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| CN108704482A (en) * | 2018-06-28 | 2018-10-26 | 江苏泓膜业科技有限公司 | A kind of antipollution hollow fiber ultrafiltration membrane |
| CN112705054A (en) * | 2020-12-24 | 2021-04-27 | 健帆生物科技集团股份有限公司 | Hollow fiber membrane, preparation method thereof and dialyzer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108704482A (en) * | 2018-06-28 | 2018-10-26 | 江苏泓膜业科技有限公司 | A kind of antipollution hollow fiber ultrafiltration membrane |
| CN112705054A (en) * | 2020-12-24 | 2021-04-27 | 健帆生物科技集团股份有限公司 | Hollow fiber membrane, preparation method thereof and dialyzer |
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Application publication date: 20160824 |