JPH06134269A - Flat separation membrane - Google Patents
Flat separation membraneInfo
- Publication number
- JPH06134269A JPH06134269A JP31647692A JP31647692A JPH06134269A JP H06134269 A JPH06134269 A JP H06134269A JP 31647692 A JP31647692 A JP 31647692A JP 31647692 A JP31647692 A JP 31647692A JP H06134269 A JPH06134269 A JP H06134269A
- Authority
- JP
- Japan
- Prior art keywords
- membrane
- polysulfone
- separation membrane
- glass fiber
- flat separation
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、平膜状分離膜に関す
る。更に詳しくは、水透過性を向上せしめたポリスルホ
ン製平膜状分離膜に関する。FIELD OF THE INVENTION The present invention relates to a flat membrane separation membrane. More specifically, it relates to a flat membrane separation membrane made of polysulfone having improved water permeability.
【０００２】[0002]
【従来の技術】ポリスルホン製平膜状分離膜は、精密ロ
過膜、限外ロ過膜などとして用いられているが、ポリス
ルホンが疎水性のため、水透過性が悪いという欠点を有
している。2. Description of the Related Art Polysulfone flat membrane separation membranes are used as precision filtration membranes and ultrafiltration membranes, but have the disadvantage of poor water permeability due to the hydrophobic nature of polysulfone. There is.
【０００３】[0003]
【発明が解決しようとする課題】本発明の目的は、精密
ロ過膜、限外ロ過膜などとして用いられる多孔質のポリ
スルホン製平膜状分離膜であって、それの水透過性を向
上せしめたものを提供することにある。An object of the present invention is a porous polysulfone flat membrane separation membrane used as a precision filtration membrane, an ultrafiltration membrane, etc., which has improved water permeability. It's about providing the best.
【０００４】[0004]
【課題を解決するための手段】かかる本発明の目的は、
膜中にガラス繊維を分散させたポリスルホン製平膜状分
離膜によって達成される。The object of the present invention is as follows.
This is achieved by a flat membrane separation membrane made of polysulfone in which glass fibers are dispersed in the membrane.
【０００５】膜中にガラス繊維を分散させたポリスルホ
ン製平膜状分離膜は、ポリスルホンを水溶性有機溶媒中
に溶解させた製膜原液中にガラス繊維を分散させ、この
ガラス繊維分散製膜原液を基質上に流延した後、水性凝
固浴中でゲル化させることにより製造される。A flat membrane separation membrane made of polysulfone in which glass fibers are dispersed is a glass fiber dispersion prepared by dissolving polysulfone in a water-soluble organic solvent. Is cast on a substrate and then gelled in an aqueous coagulation bath.
【０００６】製膜原液は、ジメチルホルムアミド、ジメ
チルアセトアミド、N-メチル-2-ピロリドン、ジオキサ
ンなどの水溶性有機溶媒中にポリスルホンを約10〜28重
量%の濃度で溶解させたものが用いられる。これに添加
されるガラス繊維は、径が約1〜30μmのものがポリスル
ホン量に対して約0.5〜20重量%、好ましくは約1〜10重
量%の割合で用いられる。ガラス繊維の添加割合がこれ
より少ないと、水透過性の向上効果がみられず、一方こ
れより多い割合で用いられると、膜の成形性が損なわれ
るようになる。添加されたガラス繊維は、製膜原液中に
撹拌混合されるので、その長さは元の長さより更に短く
なる。The membrane-forming stock solution is prepared by dissolving polysulfone in a water-soluble organic solvent such as dimethylformamide, dimethylacetamide, N-methyl-2-pyrrolidone or dioxane at a concentration of about 10 to 28% by weight. The glass fiber to be added thereto has a diameter of about 1 to 30 μm and is used at a ratio of about 0.5 to 20% by weight, preferably about 1 to 10% by weight, based on the amount of polysulfone. If the proportion of glass fiber added is less than this range, the effect of improving water permeability will not be observed, while if the proportion of glass fiber used is greater than this range, the formability of the membrane will be impaired. Since the added glass fiber is stirred and mixed in the film-forming stock solution, its length becomes shorter than the original length.
【０００７】ガラス繊維を添加した製膜原液は、アプリ
ケータなどを用いて、ガラス板などの基質上に流延した
後、一般に水が用いられる水性凝固浴中に基質ごと浸漬
してゲル化させることにより、多孔質の平膜状分離膜を
形成させる。The stock solution for film formation containing glass fibers is cast on a substrate such as a glass plate using an applicator or the like, and then the substrate is immersed in an aqueous coagulation bath where water is generally used for gelation. As a result, a porous flat membrane separation membrane is formed.
【０００８】[0008]
【発明の効果】ポリスルホン製平膜状分離膜の膜中にガ
ラス繊維を分散させることにより、それの水透過性を大
幅に向上させることができる。EFFECT OF THE INVENTION By dispersing glass fiber in the membrane of the polysulfone flat membrane separation membrane, the water permeability thereof can be greatly improved.
【０００９】[0009]
【実施例】次に、実施例について本発明を説明する。EXAMPLES The present invention will now be described with reference to examples.
【００１０】実施例１〜２ ポリスルホンのジメチルホルムアミド溶液(濃度15重量
%)よりなる製膜原液中に、ポリスルホン量に対して2重
量%(実施例１)または5重量%(実施例２)となる量のガラ
ス繊維(径約10μm、長さ10〜20mm)を加え、撹拌混合し
た。このガラス繊維分散製膜原液を、200μmギャップの
アプリケータを用いて、ガラス板上に流延した後、ガラ
ス板ごと水凝固浴中に浸漬し、ゲル化させた。Examples 1 and 2 Polysulfone in dimethylformamide solution (concentration: 15% by weight)
%) In an amount of 2% by weight (Example 1) or 5% by weight (Example 2) with respect to the amount of polysulfone in a film-forming stock solution. The mixture was added and mixed with stirring. This glass fiber dispersion film-forming stock solution was cast on a glass plate using an applicator with a 200 μm gap, and then the glass plate was immersed in a water coagulation bath to gel.
【００１１】得られた平膜状分離膜について、印加圧１
kg/cm2の条件下での純水透過試験を行うと、透水量は約
2.5ml/分・cm2(実施例１)または約4ml/分・cm2(実施例
２)であり、ガラス繊維を用いなかった平膜状分離膜の
透水量約0.2ml/分・cm2を大幅に上廻った。An applied pressure of 1 was applied to the obtained flat membrane-like separation membrane.
When the pure water permeation test is performed under the condition of kg / cm 2 , the water permeation rate is about
2.5 ml / min · cm 2 (Example 1) or about 4 ml / min · cm 2 (Example 2), and the water permeation rate of the flat membrane separation membrane without glass fiber was about 0.2 ml / min · cm 2 Greatly exceeded.
Claims (1)
リスルホン製平膜状分離膜。1. A flat membrane separation membrane made of polysulfone in which glass fibers are dispersed in the membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31647692A JPH06134269A (en) | 1992-10-30 | 1992-10-30 | Flat separation membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31647692A JPH06134269A (en) | 1992-10-30 | 1992-10-30 | Flat separation membrane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06134269A true JPH06134269A (en) | 1994-05-17 |
Family
ID=18077525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31647692A Pending JPH06134269A (en) | 1992-10-30 | 1992-10-30 | Flat separation membrane |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06134269A (en) |
-
1992
- 1992-10-30 JP JP31647692A patent/JPH06134269A/en active Pending
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