CN102166482A - Method for preparing nano functionalized high-molecular ultrafiltration membrane - Google Patents
Method for preparing nano functionalized high-molecular ultrafiltration membrane Download PDFInfo
- Publication number
- CN102166482A CN102166482A CN2011100538010A CN201110053801A CN102166482A CN 102166482 A CN102166482 A CN 102166482A CN 2011100538010 A CN2011100538010 A CN 2011100538010A CN 201110053801 A CN201110053801 A CN 201110053801A CN 102166482 A CN102166482 A CN 102166482A
- Authority
- CN
- China
- Prior art keywords
- nano
- inorganic
- ultrafiltration membrane
- preparation
- membrane
- 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 invention provides a method for preparing a nano functionalized high-molecular ultrafiltration membrane in order to fully use the nano effect of an inorganic nano material in the ultrafiltration membrane to improve the mechanical property, the hydrophillic nature and the anti-pollution performance of the membrane. The method comprises the following steps of: after completely dissolving film forming high molecules and a pore-forming additive, adding a pre-prepared inorganic nano sol; uniformly stirring and blending the mixture; directly spinning the mixture or performing curtain coating on the mixture to form a membrane; and soaking the spun mixture or the membrane in a coagulation bath to form the membrane. In the film forming process, a high-molecular gel split phase and a nano sol are hydrolyzed to form nano particles; and finally, the inorganic inorganic high-molecular ultrafiltration membrane with uniformly distributed nano particles is obtained.
Description
Technical field
The present invention discloses a kind of preparation method of nano functionalization polymer ultrafiltration membrane, belong to the nano modification technology field of membrane materials by International Patent Classification (IPC) (IPC) division, give full play to the nano effect of material, especially the preparation method who relates to the nano functionalization milipore filter can improve water flux, contamination resistance and the mechanical strength of hybridized film greatly.
Background technology
Film pollutes formation and the flux that macro manifestations mainly is fenestra obstruction, cake layer and descends.Pollution mechanism depends on the physics chemical action of material in film surface nature and the water, comprising protein contamination, and suspended solid pollution, colloid pollution, biological pollution etc.Along with deepening continuously of pollution mechanism research, the film pollution factor is also constantly excavated, and the film pollution control technology also constantly occurs thereupon.The most direct wherein the most effective film control technology is the hydrophilic modification at membrane material.The material of the most of films that use is polypropylene, polyethylene, Kynoar, polysulfones, polytetrafluoroethylene (PTFE), polyether sulfone and polyvinyl chloride etc. at present.The characteristics of these membrane materials are intensity height, the biological and chemical good stability, but hydrophilicity is relatively poor, causes the antifouling property difference of film and flux to be difficult for improving.Therefore, need carry out hydrophilic modification.Hydrophilic modification comprises modification physics, chemistry, and these modification technologies have improved flux to a certain extent, have reduced the film pollution.
The simplest method to the membrane material surface modification is the functional polymer that has certain functional group on the film surface-coated.Adopt surfactant to carry out surface-coated and also can improve and improve membrane flux within a certain period of time, but prolongation in time, surfactant comes off gradually, and flux descends, and final effect will completely lose.In addition, the fenestra obstruction that causes of coating procedure can cause declining to a great extent of membrane flux.
Chemical treatment modification method is to utilize hydrolysis, oxidation, graft copolymerization etc. to be reflected at the film surface directly to generate the hydrophily that hydrophilic radical for good and all improves the surface.Yet shortcomings such as productive rate is low, the bad and difficult industrialization of repeatability that chemical modification often exists.In addition, the mechanical strength and the chemical stability of film lost by chemical modification regular meeting.
A kind of simple method of modifying is a blending and modifying, is meant modifier and membrane material are dissolved in solvent jointly, and the casting solution that preparation mixes prepares film by inversion of phases then.Film has the characteristic of membrane material and modifier concurrently, when modifier has strongly hydrophilic, then can improve the hydrophily on film surface.This method adds hydrophilic substance just like PVA, PVP, PVP copolymer or supermolecule dendroid amphiphilic substance etc. in solvent.The hydrophilic parts of polymer is at the film surface enrichment, and the protein adsorption amount of Modified Membrane has obvious reduction, and flux is improved, and has improved strainability.Blending modification method is simple to operate, and mild condition is introduced hydroaropic substance to reduce the surface property of film, improves the hydrophily of hydrophobic polymer.But since strong-hydrophobicity high polymer such as Kynoar and hydroaropic substance exist compatibility poor in essence, make phase-splitting and reunion separately easily in the gel process, perhaps in the long-time running process, because snakelike effect runs off gradually, cause hydrophily to reduce, flux descends, and film properties worsens.
Hybrid organic-inorganic film is introduced inorganic component in organic matrix, make its toughness that has the machine film concurrently, the high hydrophily of selecting permeability and inoranic membrane, resistance tocrocking, advantage such as heat-resisting and corrosion-resistant, is one of membrane material modified focus of research at present.Bibliographical information has been carried out the preparation research of hybridized film at present, comprises the preparation method of hybridized film such as containing silica, zirconia, aluminium oxide and titanium oxide.But most method of modifying are directly to add to inorganic nano-particle in the casting solution, mix by ultrasonic and mechanical agitation mode, simply be dispersed in the macromolecule network, and inorganic nano-particle difficulties in dispersion, the energy consumption height, easily reunite, form uneven membrane structure, can not give full play to nano effect.Also have the collosol and gel of development to prepare hybridized film, but be mostly to add strong acid as catalyst, the dissolubility in casting solution is relatively poor, cause the nano material formation speed very fast, still there is local aggregation phenomenon in instability, can not well improve the film various aspects of performance.
Summary of the invention
At the deficiency of existing hybridized film technology of preparing, the invention provides a kind of method of nano modification membrane material, give full play to the nano effect of material, improve the hydrophily and the flux of hybridized film, and significantly improved the mechanical strength of film.
For achieving the above object, the present invention is achieved by the following technical solutions:
A kind of preparation method of nano functionalization polymer ultrafiltration membrane comprises the steps:
1), preparation inorganic nano colloidal sol, its composition comprises: inorganic precursor, dispersant, coupling agent, diluent, catalyst; Each component accounts for 30-50%, 0-10%, 0-5%, 35-50% and the 0-5% of Nano sol gross weight respectively;
2), preparation casting solution: organic polymer, additive and solvent is even, and wherein organic polymer accounts for 10-30%, additive 0-20%, solvent 50-90%;
3), the inorganic nano colloidal sol that will prepare in advance is added dropwise to above-mentioned casting solution, wherein inorganic nano colloidal sol accounts for the 0-30% of casting solution gross weight, mixes, direct fabrics or curtain coating knifing immerse the coagulation bath film forming again.
In the step 3), behind inorganic nano colloidal sol and casting solution blend spinning or the curtain coating knifing, prevapourising 0-120s in air puts into the coagulation bath film-forming then, puts into pure water again and soaks 1-2 days.
In the step 1), described inorganic precursor comprises: one or more in ethyl orthosilicate, aluminium isopropoxide, butyl titanate, butter of tin, zinc acetate, the zirconium oxychloride; Described dispersant comprises: polyethylene glycol, polyacrylic acid, di-2-ethylhexylphosphine oxide bitter edible plant sodium sulfonate one or more; Described coupling agent comprises: silane coupler, titanate coupling agent, aluminate coupling agent one or more; Described diluent comprises: dimethylacetylamide, dimethyl formamide, N-methyl pyrrolidone, dimethyl sulfoxide (DMSO), ethanol one or more; Described catalyst comprises: oxalic acid, acetic acid, butyric acid, naphthalene sulfonic acids one or more.
Step 2) in, described organic polymer is: Kynoar, polyvinyl chloride, polysulfones, polyether sulfone, polyacrylonitrile one or more; Described additive is: polyvinylpyrrolidone, polyethylene glycol, polyacrylic acid, lithium chloride, iron chloride, EGME, neopelex, n-butanol, Tween 80 one or more; Described solvent is: N, N-dimethylacetylamide, dimethyl formamide, N-methyl pyrrolidone, dimethyl sulfoxide (DMSO) one or more.
In the step 3), inorganic nano colloidal sol is added dropwise to above-mentioned casting solution, stirs 24h, full and uniform.
The invention provides a kind of preparation method of nano functionalization milipore filter, be intended to give full play to the nano effect of inorganic nano material in the milipore filter, improve the mechanical property of film, hydrophilicity and antifouling property.With the film forming macromolecule with become macroporous additive to dissolve fully after, add previously prepared inorganic nano colloidal sol, mix, direct fabrics or curtain coating knifing immerse the coagulation bath film forming again.In the process of film forming, except the high-molecular gel phase-splitting, Nano sol also hydrolysis forms nano particle, finally obtains the homodisperse inorganic nano polymer ultrafiltration membrane of nanometer.
The present invention joins previously prepared stable inorganic Nano sol in the casting solution, stirs, and adopts sol-gel process to prepare the nano functional film; In addition, the present invention adopts organic acid to replace inorganic acid, and it is slower to make that nano particle forms, and can progressively form along with the casting solution gel process, and nano particle is more stable, and dispersive property is better; The film that utilizes the method for the invention to handle, but dry state preservation, in the air drying process, under situation about handling without the hole protective agent, the flux of film still keeps high flux.
Utilize the nano functionalization polymer ultrafiltration membrane of method preparation of the present invention, exceed 2-4 doubly than corresponding unprocessed membrane flux.
The specific embodiment
Embodiment: a kind of preparation method of nano functionalization polymer ultrafiltration membrane comprises the steps:
1, the inorganic nano sol solution for preparing in advance, wherein precursor content is at 30-50%, and dispersant 0-10%, coupling agent 0-5%, diluent 35-50%, catalyst 0-5%, above-mentioned inorganic nano sol solution are the SiO that is generated by inorganic precursor and other additives
2, TiO
2, Al
2O
3, SnO
2Deng Nano sol solution;
2, organic polymer, additive and solvent evenly are made into casting solution, wherein organic polymer accounts for 10-30%, additive 0-20%, solvent 50-90%;
3, the above-mentioned 1 inorganic nano sol solution for preparing is progressively joined in the macromolecule casting solution 2, and stir;
4, above-mentioned casting solution is carried out spinning or curtain coating knifing, behind the prevapourising 0-120s, enter the coagulation bath film-forming then in air, gel forming is put into pure water again and was soaked 1-2 days, treats that the solvent non-solvent fully exchanges, and at room temperature dries again.
The film that utilizes the method for the invention to handle, but dry state preservation, in the air drying process, under situation about handling without the hole protective agent, the flux of film still keeps high flux.
The invention provides a kind of preparation method of nano functionalization milipore filter, be intended to give full play to the nano effect of inorganic nano material in the milipore filter, improve the mechanical property of film, hydrophilicity and antifouling property.With the film forming macromolecule with become macroporous additive to dissolve fully after, add previously prepared inorganic nano colloidal sol, mix, direct fabrics or curtain coating knifing immerse the coagulation bath film forming again.In the process of film forming, except the high-molecular gel phase-splitting, Nano sol also hydrolysis forms nano particle, finally obtains the homodisperse inorganic nano polymer ultrafiltration membrane of nanometer.
Utilize the film after method of the present invention is handled, exceed 2-4 doubly than corresponding unprocessed membrane flux, specifically as seen following (embodiment 1 and comparative example 2):
Embodiment 1
At first with PVDF(18%), N, N-dimethylacetylamide (69%), PEG600(6%), LiCl(3%), PVP(1%) dissolving stirs the SiO that will prepare in advance again
2Colloidal sol is got (3%) and is progressively joined above-mentioned casting solution, stirs 4h, waits fully scatteredly, and 10h is soaked in spinning (core liquid is pure water, and coagulation bath is a running water), dries.At ambient temperature, utilizing the stretching strength determination instrument that film is carried out fracture strength measures.Recording nano functionalization hollow film strength is 20Mpa.Pure water flux is 600LMH, bovine serum albumin rejection 90%;
The comparative example 2
With PVDF(18%), N, N-dimethylacetylamide (69%), PEG600(6%), LiCl(3%), PVP(1%) dissolving stir, do not add SiO
2Colloidal sol, 10h is soaked in spinning (core liquid is pure water, and coagulation bath is a running water), dries.At ambient temperature, utilizing the stretching strength determination instrument that film is carried out fracture strength measures.Recording nano functionalization hollow film strength is 6Mpa.Pure water flux is 300LMH, bovine serum albumin rejection 88%.
The above record only for utilizing the embodiment of this origination techniques content, anyly is familiar with modification, the variation that this skill person uses this creation to do, and all belongs to the claim of this creation opinion, and is not limited to those disclosed embodiments.
Claims (5)
1. the preparation method of a nano functionalization polymer ultrafiltration membrane is characterized in that comprising the steps:
1), preparation inorganic nano colloidal sol, its composition comprises: inorganic precursor, dispersant, coupling agent, diluent, catalyst; Each component accounts for 30-50%, 0-10%, 0-5%, 35-50% and the 0-5% of Nano sol gross weight respectively;
2), preparation casting solution: organic polymer, additive and solvent is even, and wherein organic polymer accounts for 10-30%, additive 0-20%, solvent 50-90%;
3), the inorganic nano colloidal sol that will prepare in advance is added dropwise to above-mentioned casting solution, wherein inorganic nano colloidal sol accounts for the 0-30% of casting solution gross weight, mixes, direct fabrics or curtain coating knifing immerse the coagulation bath film forming again.
2. the preparation method of nano functionalization polymer ultrafiltration membrane according to claim 1, it is characterized in that: in the step 3) behind inorganic nano colloidal sol and casting solution blend spinning or the curtain coating knifing, prevapourising 0-120s in air puts into the coagulation bath film-forming then, puts into pure water again and soaks.
3. the preparation method of nano functionalization polymer ultrafiltration membrane according to claim 1, it is characterized in that: in the step 1), described inorganic precursor comprises: one or more in ethyl orthosilicate, aluminium isopropoxide, butyl titanate, butter of tin, zinc acetate, the zirconium oxychloride; Described dispersant comprises: polyethylene glycol, polyacrylic acid, di-2-ethylhexylphosphine oxide bitter edible plant sodium sulfonate one or more; Described coupling agent comprises: silane coupler, titanate coupling agent, aluminate coupling agent one or more; Described diluent comprises: dimethylacetylamide, dimethyl formamide, N-methyl pyrrolidone, dimethyl sulfoxide (DMSO), ethanol one or more; Described catalyst comprises: oxalic acid, acetic acid, butyric acid, naphthalene sulfonic acids one or more.
4. the preparation method of nano functionalization polymer ultrafiltration membrane according to claim 1 is characterized in that: step 2) in, described organic polymer is: Kynoar, polyvinyl chloride, polysulfones, polyether sulfone, polyacrylonitrile one or more; Described additive is: polyvinylpyrrolidone, polyethylene glycol, polyacrylic acid, lithium chloride, iron chloride, EGME, neopelex, n-butanol, Tween 80 one or more; Described solvent is: N, N-dimethylacetylamide, dimethyl formamide, N-methyl pyrrolidone, dimethyl sulfoxide (DMSO) one or more.
5. the preparation method of nano functionalization polymer ultrafiltration membrane according to claim 1 is characterized in that: in the step 3), inorganic nano colloidal sol is added dropwise to above-mentioned casting solution, stirs full and uniform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100538010A CN102166482A (en) | 2011-03-07 | 2011-03-07 | Method for preparing nano functionalized high-molecular ultrafiltration membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100538010A CN102166482A (en) | 2011-03-07 | 2011-03-07 | Method for preparing nano functionalized high-molecular ultrafiltration membrane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102166482A true CN102166482A (en) | 2011-08-31 |
Family
ID=44487914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100538010A Pending CN102166482A (en) | 2011-03-07 | 2011-03-07 | Method for preparing nano functionalized high-molecular ultrafiltration membrane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102166482A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489180A (en) * | 2011-12-01 | 2012-06-13 | 中国科学院苏州纳米技术与纳米仿生研究所 | Preparation method for composite porous filter membrane made of high polymer/nano material |
| CN103087448A (en) * | 2012-12-18 | 2013-05-08 | 青岛博益特生物材料有限公司 | PVDF (Polyvinylidene Fluoride)/PVA (Polyvinyl Acetate)/nanometer SiO2 composite membrane |
| CN103521095A (en) * | 2013-10-31 | 2014-01-22 | 上海赛奥分离技术工程有限公司 | Method for preparing tubular ceramic membrane for oil-water separation |
| CN103877869A (en) * | 2012-12-19 | 2014-06-25 | 中国科学院大连化学物理研究所 | Porous membrane made of polytetrafluoroethylene hollow fibers, preparation method and application thereof in membrane contactor |
| CN106589715A (en) * | 2015-12-31 | 2017-04-26 | 罗道友 | Application and preparation method of functional TiO2 nanomaterial supported PVDF (polyvinylidene fluoride) master batch |
| US9663400B2 (en) | 2013-11-08 | 2017-05-30 | Corning Incorporated | Scratch-resistant liquid based coatings for glass |
| CN107596785A (en) * | 2017-10-26 | 2018-01-19 | 成都新柯力化工科技有限公司 | The filter cloth and preparation method of PM2.5 particles in a kind of purification air |
| CN107638817A (en) * | 2017-10-13 | 2018-01-30 | 中国科学院生态环境研究中心 | A kind of hydrophilic and oleophobic films of compound PTFE/PAN and preparation method thereof |
| CN108159888A (en) * | 2018-01-09 | 2018-06-15 | 贵阳时代沃顿科技有限公司 | A kind of preparation method of the super hydrophilic ultrafiltration membrane with photocatalysis performance |
| CN108786495A (en) * | 2018-06-13 | 2018-11-13 | 南通强生石墨烯科技有限公司 | A kind of antibacterial graphene oxide is modified PVDF hollow-fibre membranes and preparation method thereof |
| CN108854549A (en) * | 2018-06-28 | 2018-11-23 | 江苏泓膜业科技有限公司 | A kind of preparation method weaving tube enhancement type hollow fiber ultrafiltration membrane |
| CN110078240A (en) * | 2019-05-28 | 2019-08-02 | 浙江海印数码科技有限公司 | It is digital ink-jet printed to use ink processing method |
| CN114797803A (en) * | 2022-06-28 | 2022-07-29 | 南通纳爱斯环保科技有限公司 | Modified polyphenylsulfone filtering membrane applied to arsenic removal and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101164679A (en) * | 2007-08-10 | 2008-04-23 | 哈尔滨工业大学 | Polyvinylidene fluoride nanometer composite super low pressure ultrafiltering membrane and preparation method thereof |
| CN101695671A (en) * | 2009-10-26 | 2010-04-21 | 浙江大学 | Organic/inorganic photocatalytic compound film and preparation method thereof |
| CN101698141A (en) * | 2009-10-23 | 2010-04-28 | 华南理工大学 | Method for preparing polyvinylidene fluoride/aluminum oxide hybridization film |
-
2011
- 2011-03-07 CN CN2011100538010A patent/CN102166482A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101164679A (en) * | 2007-08-10 | 2008-04-23 | 哈尔滨工业大学 | Polyvinylidene fluoride nanometer composite super low pressure ultrafiltering membrane and preparation method thereof |
| CN101698141A (en) * | 2009-10-23 | 2010-04-28 | 华南理工大学 | Method for preparing polyvinylidene fluoride/aluminum oxide hybridization film |
| CN101695671A (en) * | 2009-10-26 | 2010-04-21 | 浙江大学 | Organic/inorganic photocatalytic compound film and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 杨亚楠等: "溶胶-凝胶法制备聚砜/二氧化钛有机-无机杂化超滤膜", 《化学学报》 * |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489180B (en) * | 2011-12-01 | 2014-04-16 | 中国科学院苏州纳米技术与纳米仿生研究所 | Preparation method for composite porous filter membrane made of high polymer/nano material |
| CN102489180A (en) * | 2011-12-01 | 2012-06-13 | 中国科学院苏州纳米技术与纳米仿生研究所 | Preparation method for composite porous filter membrane made of high polymer/nano material |
| CN103087448A (en) * | 2012-12-18 | 2013-05-08 | 青岛博益特生物材料有限公司 | PVDF (Polyvinylidene Fluoride)/PVA (Polyvinyl Acetate)/nanometer SiO2 composite membrane |
| CN103877869A (en) * | 2012-12-19 | 2014-06-25 | 中国科学院大连化学物理研究所 | Porous membrane made of polytetrafluoroethylene hollow fibers, preparation method and application thereof in membrane contactor |
| CN103521095A (en) * | 2013-10-31 | 2014-01-22 | 上海赛奥分离技术工程有限公司 | Method for preparing tubular ceramic membrane for oil-water separation |
| CN103521095B (en) * | 2013-10-31 | 2015-04-08 | 上海赛奥分离技术工程有限公司 | Method for preparing tubular ceramic membrane for oil-water separation |
| US10358383B2 (en) | 2013-11-08 | 2019-07-23 | Corning Incorporated | Wear-resistant liquid-based coatings for glass |
| US9663400B2 (en) | 2013-11-08 | 2017-05-30 | Corning Incorporated | Scratch-resistant liquid based coatings for glass |
| CN106589715A (en) * | 2015-12-31 | 2017-04-26 | 罗道友 | Application and preparation method of functional TiO2 nanomaterial supported PVDF (polyvinylidene fluoride) master batch |
| CN107638817A (en) * | 2017-10-13 | 2018-01-30 | 中国科学院生态环境研究中心 | A kind of hydrophilic and oleophobic films of compound PTFE/PAN and preparation method thereof |
| CN107596785A (en) * | 2017-10-26 | 2018-01-19 | 成都新柯力化工科技有限公司 | The filter cloth and preparation method of PM2.5 particles in a kind of purification air |
| CN107596785B (en) * | 2017-10-26 | 2020-06-16 | 上海盈兹无纺布有限公司 | Filter cloth for purifying PM2.5 particles in air and preparation method thereof |
| CN108159888A (en) * | 2018-01-09 | 2018-06-15 | 贵阳时代沃顿科技有限公司 | A kind of preparation method of the super hydrophilic ultrafiltration membrane with photocatalysis performance |
| WO2019137054A1 (en) * | 2018-01-09 | 2019-07-18 | 时代沃顿科技有限公司 | Preparation method for super-hydrophilic ultrafiltration membrane having photocatalytic properties |
| CN108159888B (en) * | 2018-01-09 | 2020-03-13 | 时代沃顿科技有限公司 | Preparation method of super-hydrophilic ultrafiltration membrane with photocatalytic performance |
| RU2751513C1 (en) * | 2018-01-09 | 2021-07-14 | Вонтрон Мембрейн Текнолоджи Ко., Лтд. | Method for producing a superhydrophylic ultrafiltration membrane with photocatalytic properties |
| CN108786495A (en) * | 2018-06-13 | 2018-11-13 | 南通强生石墨烯科技有限公司 | A kind of antibacterial graphene oxide is modified PVDF hollow-fibre membranes and preparation method thereof |
| CN108854549A (en) * | 2018-06-28 | 2018-11-23 | 江苏泓膜业科技有限公司 | A kind of preparation method weaving tube enhancement type hollow fiber ultrafiltration membrane |
| CN110078240A (en) * | 2019-05-28 | 2019-08-02 | 浙江海印数码科技有限公司 | It is digital ink-jet printed to use ink processing method |
| CN110078240B (en) * | 2019-05-28 | 2022-02-22 | 浙江海印数码科技有限公司 | Ink processing method for digital ink-jet printing |
| CN114797803A (en) * | 2022-06-28 | 2022-07-29 | 南通纳爱斯环保科技有限公司 | Modified polyphenylsulfone filtering membrane applied to arsenic removal and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102166482A (en) | Method for preparing nano functionalized high-molecular ultrafiltration membrane | |
| CN105749766B (en) | A kind of Kynoar/TiO2The preparation method of Nano sol composite hyperfiltration membrane | |
| CN100463712C (en) | Prepn process of reinforced hybrid organic-inorganic film | |
| CN104888623B (en) | A kind of super hydrophilic composite porous film of Kynoar and its preparation method carrying silver-colored super hydrophilic film | |
| CN102580560B (en) | Method for preparing nano-material-doped polymer film | |
| CN102527262B (en) | Method for preparing chemically perforated polyvinylidene fluoride hollow fiber ultrafiltration membrane | |
| CN107170942A (en) | A kind of high-temperature resistant aramid fiber lithium ion battery composite separation membrane and preparation method thereof | |
| CN102240510B (en) | Method for preparing super-hydrophilic polyvinylidene fluoride membrane | |
| CN102688705A (en) | Hydrophilic modification method of PVDF ultrafilter membrane by utilization of nano-TiO2 sol | |
| CN111760461B (en) | Preparation method of polyvinylidene fluoride mixed matrix membrane | |
| CN100577269C (en) | Method for preparing polyaniline and nano-fibre blend composite film | |
| CN109276998B (en) | High-performance Janus forward osmosis membrane and preparation method thereof | |
| CN102389722B (en) | Method for preparing nano composite ultrafiltration membrane by using polyaniline nano material | |
| CN102068925B (en) | Preparation method of polyaniline nano composite film | |
| CN103394293B (en) | A kind of preparation method of hydrophilia polyvinylidene fluoride hollow fiber membrane | |
| CN103861476A (en) | Preparation method of polyvinylidene fluoride (PVDF) composite mesoporous membrane | |
| CN101698141B (en) | Method for preparing polyvinylidene fluoride/aluminum oxide hybridization film | |
| WO2021258701A1 (en) | Preparation method of sustainable hydrophilic modified polyvinylidene fluoride hollow membrane | |
| CN108837714A (en) | A kind of poly-dopamine/manganese dioxide composite membrane and preparation method thereof | |
| CN1817419A (en) | Production of liquid separating film | |
| CN104415667A (en) | Method of modifying polyolefin ultrafiltration membrane through polyaniline in-situ polymerization method | |
| CN105032211A (en) | Novel hydrophobic membrane and preparation method thereof | |
| CN104383818A (en) | Composite microporous diaphragm, preparation method and application thereof | |
| CN105478020A (en) | MOFs/NaA molecular sieve composite membrane for acetic acid dehydration and preparation method for MOFs/NaA molecular sieve composite membrane | |
| CN110917905B (en) | Ultrafiltration membrane and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110831 |