JP2008062127A5 - Separation membrane manufacturing method and separation membrane for water treatment - Google Patents
Separation membrane manufacturing method and separation membrane for water treatment Download PDFInfo
- Publication number
- JP2008062127A5 JP2008062127A5 JP2006239964A JP2006239964A JP2008062127A5 JP 2008062127 A5 JP2008062127 A5 JP 2008062127A5 JP 2006239964 A JP2006239964 A JP 2006239964A JP 2006239964 A JP2006239964 A JP 2006239964A JP 2008062127 A5 JP2008062127 A5 JP 2008062127A5
- Authority
- JP
- Japan
- Prior art keywords
- separation membrane
- oxygen
- manufacturing
- perfluorocarbon
- containing substance
- 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.)
- Granted
Links
- 239000012528 membrane Substances 0.000 title claims description 22
- 238000000926 separation method Methods 0.000 title claims description 15
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 6
- 229910001868 water Inorganic materials 0.000 title claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 12
- 239000001301 oxygen Substances 0.000 claims description 12
- TXEYQDLBPFQVAA-UHFFFAOYSA-N Tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 8
- AKEJUJNQAAGONA-UHFFFAOYSA-N Sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 claims description 4
- 125000001153 fluoro group Chemical group F* 0.000 claims description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 4
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Chemical compound O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims description 4
- 125000004430 oxygen atoms Chemical group O* 0.000 claims description 4
- -1 polytetrafluoroethylene, ethylenetetrafluoroethylene copolymer Polymers 0.000 claims description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 4
- 229920002301 Cellulose acetate Polymers 0.000 claims description 2
- HCDGVLDPFQMKDK-UHFFFAOYSA-N Hexafluoropropylene Chemical group FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 claims description 2
- 239000002033 PVDF binder Substances 0.000 claims description 2
- 239000004952 Polyamide Substances 0.000 claims description 2
- 239000004695 Polyether sulfone Substances 0.000 claims description 2
- 229920001721 Polyimide Polymers 0.000 claims description 2
- 239000004642 Polyimide Substances 0.000 claims description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 2
- BFKJFAAPBSQJPD-UHFFFAOYSA-N Tetrafluoroethylene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims description 2
- 125000004432 carbon atoms Chemical group C* 0.000 claims description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 2
- 239000001569 carbon dioxide Substances 0.000 claims description 2
- 239000011203 carbon fibre reinforced carbon Substances 0.000 claims description 2
- 125000005843 halogen group Chemical group 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- CBENFWSGALASAD-UHFFFAOYSA-N ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 2
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 claims description 2
- 229920002496 poly(ether sulfone) Polymers 0.000 claims description 2
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 2
- 229920002647 polyamide Polymers 0.000 claims description 2
- 239000011528 polyamide (building material) Substances 0.000 claims description 2
- 229920000515 polycarbonate Polymers 0.000 claims description 2
- 239000004417 polycarbonate Substances 0.000 claims description 2
- 239000005023 polychlorotrifluoroethylene (PCTFE) polymer Substances 0.000 claims description 2
- 229920000098 polyolefin Polymers 0.000 claims description 2
- 229920003288 polysulfone Polymers 0.000 claims description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 229910052731 fluorine Inorganic materials 0.000 claims 1
- 238000000034 method Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Description
本発明者は上記課題を解決するべく鋭意検討し、多孔質膜の表面に、通常は互いに相容れない特性である、親水性と撥油性を併せ持つ表面特性を付与できる方法を見出した。そして、該方法を用いて多孔質膜の表面に親水撥油性を付与することにより、優れた透水性、耐ファウリング性および易洗浄性を兼ね備えた分離膜を実現できることを知見して本発明を完成するに至った。
すなわち本発明の分離膜の製造方法は、多孔質膜の表面を、（Ａ）パーフルオロカーボンと、（Ｂ）酸素原子を有し、Ｃ−Ｈ結合およびハロゲン原子のいずれも有しない酸素含有物質とが存在する雰囲気中で放電処理する工程を有することを特徴とする。
前記（Ａ）パーフルオロカーボンが重合性炭素−炭素二重結合を有していることが好ましい。
前記（Ａ）パーフルオロカーボンにおけるフッ素原子と炭素原子の存在比（Ｆ／Ｃ）が１．５以上であることが好ましい。
前記（Ｂ）酸素含有物質が、酸素、オゾン、二酸化炭素、水、一酸化窒素、二酸化窒素、二酸化硫黄および三酸化硫黄からなる群から選択される１種以上であることが好ましい。
前記（Ａ）パーフルオロカーボンがテトラフルオロエチレンまたはヘキサフルオロプロピレンであり、前記（Ｂ）酸素含有物質が酸素であることが好ましい。
前記雰囲気中に存在する酸素原子の原子数とフッ素原子の原子数の比（Ｏ／Ｆ比）が０．０５〜１００であることが好ましい。
前記雰囲気中における（Ａ）パーフルオロカーボンおよび（Ｂ）酸素含有物質の含有割合の合計が５０モル％以上であることが好ましい。
前記多孔質膜の孔径が０．０１〜５μｍであることが好ましい。
前記多孔質膜の材質が、ポリオレフィン、ポリスルホン、ポリエーテルスルホン、ポリカーボネート、ポリアミド、ポリイミド、ポリアクリロニトリル、ポリビニルアルコール、酢酸セルロース、ポリテトラフルオロエチレン、エチレンテトラフルオロエチレン共重合体、ポリクロロトリフルオロエチレン、またはポリフッ化ビニリデンであることが好ましい。
本発明は、本発明の方法で製造される水処理用分離膜を提供する。
The present inventor has intensively studied to solve the above problems, and has found a method capable of imparting surface characteristics having both hydrophilicity and oil repellency, which are usually incompatible characteristics, to the surface of the porous membrane. The present invention is based on the knowledge that a separation membrane having excellent water permeability, fouling resistance and easy washing can be realized by imparting hydrophilic oil repellency to the surface of the porous membrane using the method. It came to be completed.
That is, in the method for producing a separation membrane of the present invention, the surface of the porous membrane comprises (A) perfluorocarbon and (B) an oxygen-containing substance having oxygen atoms and having neither C—H bonds nor halogen atoms. It has the process of carrying out an electrical discharge treatment in the atmosphere which exists.
The (A) perfluorocarbon preferably has a polymerizable carbon-carbon double bond.
The abundance ratio (F / C) of fluorine atoms to carbon atoms in the (A) perfluorocarbon is preferably 1.5 or more.
The (B) oxygen-containing substance is preferably at least one selected from the group consisting of oxygen, ozone, carbon dioxide, water, nitric oxide, nitrogen dioxide, sulfur dioxide and sulfur trioxide.
The (A) perfluorocarbon is preferably tetrafluoroethylene or hexafluoropropylene, and the (B) oxygen-containing substance is preferably oxygen.
The ratio of the number of oxygen atoms and the number of fluorine atoms (O / F ratio) in the atmosphere is preferably 0.05 to 100.
The total content of (A) perfluorocarbon and (B) oxygen-containing substance in the atmosphere is preferably 50 mol% or more.
It is preferable that the porous membrane has a pore diameter of 0.01 to 5 μm.
The material of the porous membrane is polyolefin, polysulfone, polyethersulfone, polycarbonate, polyamide, polyimide, polyacrylonitrile, polyvinyl alcohol, cellulose acetate, polytetrafluoroethylene, ethylenetetrafluoroethylene copolymer, polychlorotrifluoroethylene, Or it is preferable that it is a polyvinylidene fluoride.
The present invention provides a separation membrane for water treatment produced by the method of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006239964A JP5082347B2 (en) | 2006-09-05 | 2006-09-05 | Separation membrane manufacturing method and separation membrane for water treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006239964A JP5082347B2 (en) | 2006-09-05 | 2006-09-05 | Separation membrane manufacturing method and separation membrane for water treatment |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2008062127A JP2008062127A (en) | 2008-03-21 |
| JP2008062127A5 true JP2008062127A5 (en) | 2009-08-13 |
| JP5082347B2 JP5082347B2 (en) | 2012-11-28 |
Family
ID=39285293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2006239964A Expired - Fee Related JP5082347B2 (en) | 2006-09-05 | 2006-09-05 | Separation membrane manufacturing method and separation membrane for water treatment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5082347B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106574166B (en) | 2014-07-30 | 2018-10-02 | 三菱综合材料株式会社 | Surface covering material, coated film and hydrophilic oil repellent material |
| WO2016017754A1 (en) | 2014-07-30 | 2016-02-04 | 三菱マテリアル株式会社 | Filter medium, method for producing filter medium, water treatment module, and water treatment device |
| WO2016017686A1 (en) | 2014-07-30 | 2016-02-04 | 三菱マテリアル株式会社 | Hydrophilic oil repellent agent and method for manufacturing same, and surface covering material, coating film, resin composition, oil-water separation filter medium, and porous body |
| JP6461573B2 (en) | 2014-07-30 | 2019-01-30 | 三菱マテリアル株式会社 | Oil / water separator / collector |
| JP6384843B2 (en) * | 2017-08-21 | 2018-09-05 | 国立大学法人弘前大学 | Fluorine-containing nanocomposite particles and method for producing the same, coating agent containing the same, oil-water separation membrane, and resin composition |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6099326A (en) * | 1983-11-04 | 1985-06-03 | Agency Of Ind Science & Technol | Separation film for gas |
| JPS6223401A (en) * | 1985-07-22 | 1987-01-31 | Nok Corp | Ultrafiltration membrane |
| AU7135087A (en) * | 1986-04-11 | 1987-10-15 | Applied Membrane Technology Inc. | Preparation of a hydrophilic microfiltration membrane by means of plasma treatment |
| JPH0761434B2 (en) * | 1988-03-18 | 1995-07-05 | セントラル硝子株式会社 | Material permeable membrane |
| US5073175A (en) * | 1988-08-09 | 1991-12-17 | Air Products And Chemicals, Inc. | Fluorooxidized polymeric membranes for gas separation and process for preparing them |
| JP2926869B2 (en) * | 1990-04-20 | 1999-07-28 | エヌオーケー株式会社 | Hollow fiber surface treatment method for hollow fiber module |
| JPH05329342A (en) * | 1992-05-29 | 1993-12-14 | Dainippon Ink & Chem Inc | Production of polymeric separation membrane |
-
2006
- 2006-09-05 JP JP2006239964A patent/JP5082347B2/en not_active Expired - Fee Related
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