CN1377725A - Macroporous polymer filtering membrane and its prepn. - Google Patents
Macroporous polymer filtering membrane and its prepn. Download PDFInfo
- Publication number
- CN1377725A CN1377725A CN 01110076 CN01110076A CN1377725A CN 1377725 A CN1377725 A CN 1377725A CN 01110076 CN01110076 CN 01110076 CN 01110076 A CN01110076 A CN 01110076A CN 1377725 A CN1377725 A CN 1377725A
- Authority
- CN
- China
- Prior art keywords
- preparation
- solvent
- filtering membrane
- macroporous polymer
- membrane according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The present invention provides a macroporous polymer filtering membrane and its preparation. The membrane has thickness of 70-100 micron, pore size of 10-20 micron and bubbling point pressure of 0.005 MPa. The membrane is prepared through dry and wet process by using hydrophobic polymer as base material and adding hydrophilic polymer and non-solvent. It is used in processing suspension without particle staying in pores to produce pollution and is easy to regenerate through back washing. When used in purifying blood,blood cells may pass freely without damage and some pathogenetic factors may be eliminated selectively by means of modification of the membrane.
Description
The invention belongs to a kind of macroporous polymer filtering membrane and preparation method.
The polymer filter membrane that uses has the height asymmetry at present, the aperture is mainly 1-5 μ m, two surperficial perforate aperture ratios reach 10: 1 or are higher, it between the surface asymmetrical supporting layer, on film-forming process, be intended to immerse in the water when moisture absorption phase-splitting gel is not really complete in the air, to form cortex, form the height unsymmetric structure, such as US Pat.6110369, the invention of US Pat.5979670 and US Pat.5846422, these patented technologies are with polymer (being mainly polysulfones), be dissolved in dimethyl formamide, dimethylacetylamide, the N-methyl pyrrolidone, in the dimethyl sulfoxide (DMSO) equal solvent, add an amount of non-solvent (alcohol, alkane, ketone), with the polymer of 7-28%, the non-solvent of 0-30% (w/v), absorbent gelling immerses in the water again in air, and preparation has the macroporous membrane of height asymmetry, and two surperficial perforate aperture ratios of film can reach 10: 1 or be higher, be asymmetrical porous support structure between two surfaces, its main aperture of cortex perforate is 1-5 μ m; US Pat.6045899 is with hydrophilic hydrophobic polymer blend, make micro-filtration membrane with certain hydrophilic height unsymmetric structure, cortex perforate aperture is 0.1-10 μ m, cortex is the porous supporting layer of unsymmetric structure down, the aperture constantly increases downwards, and the 5-1000 that is the cortex aperture in another surperficial perforate aperture doubly.For obtaining unsymmetric structure, film forming procedure is to stop in air 2-20 second, promptly immerses in the water and floods, to obtain the height unsymmetric structure.Made its cortex hole of film of these methods generally is lower than 10 μ m, painstakingly pursues the unsymmetric structure of height.
The purpose of this invention is to provide a kind of macroporous polymer filtering membrane and preparation method, this preparation method's advantage is easy and simple to handle, gained membrane structure uniqueness.
The present invention realizes above-mentioned purpose by the following technical solutions:
Macroporous polymer filtering membrane provided by the invention is made of the macropore duct of porous zone and perforation, and the porous zone is communicated with or is not communicated with aperture, and perforate is cylindrical hole substantially, and slightly tortuous, the aperture is extended constant substantially with the duct.
Preparation method provided by the invention is: form (mass percent) with hydrophobic polymer membrane material, solvent and non-solvent and be respectively hydrophobic polymer 7-15%, solvent 50-80%, non-solvent 5-30%, and interpolation hydrophilic macromolecule additive 1-3%, scrape coating liquid on the atresia supporting layer, thickness 300-500 μ m, to do the wet method film forming, promptly in 30-60 ℃, moisture absorption precipitation 15-30min in the air of relative humidity 50-80%, treat to immerse after phase-splitting is finished substantially and exchange solvent in the water and remove unnecessary component, the cured film structure.
In above-mentioned preparation method, the hydrophobic polymer membrane material is polyether sulfone, polysulfones or PEI hydrophobic polymer; Solvent is dimethyl formamide or N-methyl pyrrolidone; Non-solvent is the polyalcohols of volatile ketone, alcohols and fixedness; The hydrophilic macromolecule additive is PVP or polyvinyl alcohol.
More particularly, in above-mentioned preparation method, volatile ketone is an acetone; Volatile alcohols is an ethanol; Nonvolatile polyalcohols is glycerine or diglycol.
The present invention is membrane material with the hydrophobic polymer, add hydrophilic macromolecule and an amount of non-solvent, to do the macroporous membrane of wet method preparation, residual hydrophilic high mol makes film have certain hydrophily, and pore structure can't be divided with cortex, supporting layer, but constitute by the macropore duct of porous zone and perforation, the porous zone is communicated with or is not communicated with aperture, and perforate is cylindrical hole substantially, and is slightly tortuous, the aperture is extended constant substantially with the duct, slightly similar to nucleopore membranes.The gained film is used for the processing of suspension, can prevent that particle is stranded in the hole and the pollution that causes is easy to backwash and regeneration.Be used for blood purification, can make the haemocyte freedom by and do not cause infringement, to the group affine modification in addition of residual hydrophilic high mol, can from blood, selectivity remove virulence factor.The thickness 70-100 μ m of the present invention's preparation, the aperture is 5-20 μ m, bubble point pressure is 0.005MPa.
Below in conjunction with embodiment the present invention is elaborated.
Embodiment 1, poly (ether sulfone) film material 15%, mixed solvent 80%, acetone 30%, diglycol 30%, PVP 3%, join preparation liquid, scrape coating liquid on glass plate, thick is 500 μ m, in 60 ℃, moisture absorption precipitation 30min in the air of relative humidity 80% treats to immerse in the water after phase-splitting is finished substantially.
Embodiment 2, PS membrane material 7%, mixed solvent 50%, acetone 5%, 1: 1 mixed liquor 5% of glycerine and diglycol, PVP 1% is joined preparation liquid, scrapes coating liquid on glass plate, thick is 300 μ m, in 30 ℃, and moisture absorption precipitation 15min in the air of relative humidity 50%.All the other conditions are with implementing 1.
Embodiment 3, PEI membrane material 10%, mixed solvent 65%, acetone 18%, glycerine 18%, polyvinyl alcohol 2% is joined preparation liquid, scrapes coating liquid on glass plate, and thick is 400 μ m, in 45 ℃, moisture absorption precipitation 20min in the air of relative humidity 65%.All the other conditions are with implementing 1.
The present invention is with polyether sulfone, polysulfones, hydrophobic polymers such as PEI are membrane material, and interpolation hydrophilic macromolecule additive PVP, PVA etc. and the pore-foaming agent of non-solvent as macropore, and hydrophilic high mol residues in the hydrophily that increases film in the film, made certain hydrophilic macropore filter membrane, to become membrane aperture be 5-20 μ m, the structure uniqueness, the duct is cylindricality substantially, slightly tortuous, membrane structure has not been cortex generally speaking, the supporting layer structure, but constitute by the macropore duct of formed porous zone of the micella in film forming and perforation, wherein the porous zone has aperture to be communicated with or is not communicated with, the macropore diameter of film extends constant substantially with the duct, film is easy to backwash and regeneration, also can be to residual PVP, the active group of PVA carries out graft copolymerization and affine modification, fixing aglucon, be used to purify the blood, remove the virulence factor in the blood, and do not damage haemocyte.
Claims (9)
1, a kind of macroporous polymer filtering membrane is characterized in that, described membrane pore structure is to be made of porous zone and the macropore duct that connects, the porous zone is communicated with or is not communicated with aperture, and perforate is cylindrical hole substantially, and is slightly tortuous, the aperture is extended constant substantially with the duct, and the aperture is 5-20 μ m.
2, a kind of preparation method of macroporous polymer filtering membrane, it is characterized in that: form (mass percent) with hydrophobic polymer membrane material, solvent and non-solvent and be respectively hydrophobic polymer 7-15%, solvent 50-80%, non-solvent 5-30%, and interpolation hydrophilic macromolecule additive 1-3%, scrape coating liquid on the atresia supporting layer, thickness 300-500 μ m, to do the wet method film forming, promptly in 30-60 ℃, moisture absorption precipitation 15-30min in the air of relative humidity 50-80%, treat to immerse after phase-splitting is finished substantially and exchange solvent in the water and remove unnecessary component, the cured film structure.
3, the preparation method of a kind of macroporous polymer filtering membrane according to claim 2 is characterized in that: described hydrophobic polymer membrane material is polyether sulfone, polysulfones or PEI hydrophobic polymer.
4, the preparation method of a kind of macroporous polymer filtering membrane according to claim 2 is characterized in that: described solvent is dimethyl formamide or N-methyl pyrrolidone.
5, the preparation method of a kind of macroporous polymer filtering membrane according to claim 2 is characterized in that: described non-solvent is the polyalcohols of volatile ketone, alcohols and fixedness.
6, the preparation method of a kind of macroporous polymer filtering membrane according to claim 5 is characterized in that: described volatile ketone is an acetone.
7, the preparation method of a kind of macroporous polymer filtering membrane according to claim 5 is characterized in that: described volatile alcohols is an ethanol.
8, the preparation method of a kind of macroporous polymer filtering membrane according to claim 5 is characterized in that: described nonvolatile polyalcohols is glycerine or diglycol.
9, the preparation method of a kind of macroporous polymer filtering membrane according to claim 2 is characterized in that: described hydrophilic macromolecule additive is PVP or polyvinyl alcohol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01110076 CN1377725A (en) | 2001-03-29 | 2001-03-29 | Macroporous polymer filtering membrane and its prepn. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01110076 CN1377725A (en) | 2001-03-29 | 2001-03-29 | Macroporous polymer filtering membrane and its prepn. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1377725A true CN1377725A (en) | 2002-11-06 |
Family
ID=4658326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01110076 Pending CN1377725A (en) | 2001-03-29 | 2001-03-29 | Macroporous polymer filtering membrane and its prepn. |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1377725A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1314478C (en) * | 2005-01-20 | 2007-05-09 | 石油大学(华东) | Preparation of sodium polyimide filtering membranes for concentrated extracted liquid of antibionic solvent |
| CN113926316A (en) * | 2021-11-23 | 2022-01-14 | 江苏巨澜纳米科技有限公司 | Leak-proof humidifying composite hollow fiber membrane, preparation method and application thereof |
-
2001
- 2001-03-29 CN CN 01110076 patent/CN1377725A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1314478C (en) * | 2005-01-20 | 2007-05-09 | 石油大学(华东) | Preparation of sodium polyimide filtering membranes for concentrated extracted liquid of antibionic solvent |
| CN113926316A (en) * | 2021-11-23 | 2022-01-14 | 江苏巨澜纳米科技有限公司 | Leak-proof humidifying composite hollow fiber membrane, preparation method and application thereof |
| CN113926316B (en) * | 2021-11-23 | 2024-01-26 | 江苏巨澜纳米科技有限公司 | Leakage-proof humidifying composite hollow fiber membrane, preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5993661A (en) | Macroporous or microporous filtration membrane, method of preparation and use | |
| CA2788174C (en) | Multilayer microfiltration membrane | |
| KR100965108B1 (en) | Membranes with high water flux for water purification and Manufacturing method thereof | |
| JP2015163398A (en) | Separation membrane and separation membrane module, and method of producing separation membrane and method of manufacturing separation membrane module | |
| JPS6214905A (en) | Process of manufacturing microporous | |
| KR101240953B1 (en) | Method for manufacturing porous membrane and asymmetric porous membrane thereby | |
| KR100557264B1 (en) | Hollow fiber membrane and process for producing the same | |
| MXPA00002652A (en) | Solvent-resistant microporous polybenzimidazole membranes. | |
| JP2004290751A (en) | Method for manufacturing steam permeable membrane | |
| CN1377725A (en) | Macroporous polymer filtering membrane and its prepn. | |
| KR20070071832A (en) | Method for preparation of hydrophilic asymmetric utrafiltration and microfiltration membranes containing silvernano particles | |
| US4608172A (en) | Plasmapheresis membrane and process for the preparation thereof | |
| JPH05317664A (en) | Porous hollow fiber membrane | |
| KR101002597B1 (en) | Method for Manufacturing Porous membrane | |
| JPS61271003A (en) | Hydrophilic compound porous membrane and its preparation | |
| KR101434184B1 (en) | Forward osmosis membrane and manufacturing method thereof | |
| JP4015653B2 (en) | Method for producing porous separation membrane | |
| CN105126657A (en) | Preparation method of hydrophilic polyvinylidene fluoride hollow fiber membrane | |
| JPS6041503A (en) | Polyether sulfone microporous membrane and its manufacture | |
| CN1236844C (en) | Method for preparing hydrophilic microporous material | |
| JPH0561970B2 (en) | ||
| KR0170582B1 (en) | Hydrophobic resin separation membrane and manufacturing method thereof | |
| JPS6214904A (en) | Process of turning surface of hydrophobic microporous filter membrane hydrophilic | |
| CN111013411B (en) | Nanofiltration membrane for purifying water and preparation method and application thereof | |
| JPH0693980B2 (en) | Composite ultrafiltration membrane |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |