JPH07124452A - Gas-liquid separation membrane - Google Patents
Gas-liquid separation membraneInfo
- Publication number
- JPH07124452A JPH07124452A JP29448093A JP29448093A JPH07124452A JP H07124452 A JPH07124452 A JP H07124452A JP 29448093 A JP29448093 A JP 29448093A JP 29448093 A JP29448093 A JP 29448093A JP H07124452 A JPH07124452 A JP H07124452A
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- gas
- continuous
- holes
- porous structure
- 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
- 239000007788 liquid Substances 0.000 title claims abstract description 72
- 238000000926 separation method Methods 0.000 title claims abstract description 36
- 239000012528 membrane Substances 0.000 title claims abstract description 30
- 239000007791 liquid phase Substances 0.000 claims abstract description 26
- 239000000463 material Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 239000005871 repellent Substances 0.000 claims description 13
- 230000002940 repellent Effects 0.000 claims description 9
- 239000012808 vapor phase Substances 0.000 claims 1
- 239000011148 porous material Substances 0.000 abstract description 30
- 239000012071 phase Substances 0.000 abstract description 18
- 102000004169 proteins and genes Human genes 0.000 abstract description 6
- 108090000623 proteins and genes Proteins 0.000 abstract description 6
- 239000004094 surface-active agent Substances 0.000 abstract description 6
- 239000012466 permeate Substances 0.000 abstract description 5
- 239000007864 aqueous solution Substances 0.000 abstract description 4
- 238000009792 diffusion process Methods 0.000 abstract description 4
- -1 polytetrafluoroethylene Polymers 0.000 description 11
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 9
- 239000004810 polytetrafluoroethylene Substances 0.000 description 8
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 8
- 241000894006 Bacteria Species 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- 238000005273 aeration Methods 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Laminated Bodies (AREA)
Abstract
(57)【要約】
【目的】 蛋白質や界面活性剤等を含有する水溶液のよ
うに、多孔質構造体の表面に濡れを生じ易い液体を気液
分離の対象とする場合であっても、多孔質構造体の孔内
に液体が浸透しにくく、気相から液相への散気や気液分
離に支障を生じることがない気液分離膜を提供するこ
と。
【構成】 気相側の面が多孔質構造体であり、液相側の
面が連続貫通孔を持つ構造体である二層が接した構造を
含む多層構造からなることを特徴とする気液分離膜。(57) [Summary] [Purpose] Even when a liquid that easily wets the surface of the porous structure, such as an aqueous solution containing a protein or a surfactant, is targeted for gas-liquid separation, To provide a gas-liquid separation membrane in which a liquid hardly permeates into the pores of a porous structure and does not hinder air-liquid diffusion or gas-liquid separation from the gas phase. [Structure] A gas-liquid having a multi-layered structure including a structure in which two surfaces are in contact with each other, the surface on the gas phase side is a porous structure, and the surface on the liquid phase side is a structure having continuous through holes Separation membrane.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、気液分離膜に関し、さ
らに詳しくは、気相と液相とを分離し、必要に応じて、
液中に気泡を散気することのできる気液分離膜に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-liquid separation membrane, and more specifically, it separates a gas phase and a liquid phase, and if necessary,
The present invention relates to a gas-liquid separation membrane capable of diffusing bubbles in a liquid.
【０００２】[0002]
【従来の技術】現状の気液分離膜は、一般に、分離膜と
して多孔質体構造体を用いており、該多孔質構造体によ
って気相と液相とを仕切ると共に、気相より陽圧を加え
るか、あるいは液相より陰圧を加えることにより、多孔
質構造体を介して気相から液相へと気泡を圧送する散気
機能を有している。多孔質構造体としては、例えば、延
伸法によるポリテトラフルオロエチレン多孔質体のよう
に微細な繊維−結節構造を有するものや、造孔剤を用い
た溶出法によるもの、不織布構造を有するものなど各種
構造を有する多孔質膜が使用されている。また、これら
の多孔質構造体は、ゴミや雑菌が気相から液相に混入す
るのを防ぐ役割をも持っているため、一般に、平均孔径
０．１〜１０μｍ程度の微小孔径のものが汎用されてい
る。2. Description of the Related Art Current gas-liquid separation membranes generally use a porous structure as a separation membrane. The porous structure separates a gas phase from a liquid phase, and a positive pressure is applied from the gas phase. By adding or by applying a negative pressure from the liquid phase, it has a diffusing function of pumping bubbles from the gas phase to the liquid phase through the porous structure. As the porous structure, for example, one having a fine fiber-nodule structure such as polytetrafluoroethylene porous body by a stretching method, one by an elution method using a pore-forming agent, one having a non-woven fabric structure, etc. Porous membranes having various structures are used. Further, since these porous structures also have a role of preventing dust and miscellaneous bacteria from mixing from the gas phase into the liquid phase, generally, those having a micropore diameter of about 0.1 to 10 μm are generally used. Has been done.
【０００３】気液分離膜に使用される多孔質構造体は、
気相から液相への気泡の圧送を停止した際に、液体が多
孔質構造体の孔内に浸透しないことが望ましい。液体が
多孔質構造体の孔内に浸透すると、気相から液相への散
気に大きな圧力を必要としたり、場合によっては、気液
の分離ができなくなってしまうことがある。そこで、液
相が水系の場合、気液分離膜として、撥水性材料から形
成された多孔質構造体を使用するか、あるいは非撥水性
材料で形成された多孔質構造体の表面を撥水性材料で被
覆して撥水性を付与したものを使用している。The porous structure used for the gas-liquid separation membrane is
It is desirable that the liquid does not penetrate into the pores of the porous structure when the pumping of the bubbles from the gas phase to the liquid phase is stopped. When the liquid permeates into the pores of the porous structure, a large pressure may be required to diffuse gas from the gas phase into the liquid phase, or in some cases, the gas-liquid cannot be separated. Therefore, when the liquid phase is an aqueous phase, a porous structure formed of a water repellent material is used as the gas-liquid separation film, or the surface of the porous structure formed of a non-water repellent material is treated with a water repellent material. It is coated with to give water repellency.
【０００４】ところが、液相が水系であっても、蛋白質
や界面活性剤等を含有している場合には、気液分離膜と
して撥水性の材料で作成された多孔質構造体を使用して
も、多孔質構造体の表面に濡れが生じ、液相への気体の
圧送を停止した場合、液体が多孔質構造体の孔内に徐々
に浸透してしまう。その結果、液体の多孔質構造体の孔
に対する毛管力が発生するため、液中に気泡を散気する
のに非常に大きな圧力を要したり、ひどい場合には、気
相と液相との分離が完全には行えなくなるといった問題
が生じていた。However, even if the liquid phase is aqueous, if it contains proteins, surfactants, etc., a porous structure made of a water-repellent material is used as the gas-liquid separation membrane. However, when the surface of the porous structure is wetted and the pressure feeding of the gas to the liquid phase is stopped, the liquid gradually permeates into the pores of the porous structure. As a result, a capillary force is generated against the pores of the liquid porous structure, so it takes a very large pressure to diffuse the air bubbles into the liquid, or in the worst case, the gas phase and the liquid phase are separated from each other. There was a problem that the separation could not be completed completely.
【０００５】[0005]
【発明が解決しようとする課題】本発明の目的は、蛋白
質や界面活性剤等を含有する水溶液のように、多孔質構
造体の表面に濡れを生じ易い液体を気液分離の対象とす
る場合であっても、多孔質構造体の孔内に液体が浸透し
にくく、気相から液相への散気や気液分離に支障を生じ
ることがない気液分離膜を提供することにある。本発明
者は、前記従来技術の問題点を克服するために鋭意研究
した結果、気相側の面が多孔質構造体であり、液相側の
面が連続貫通孔を持つ構造体である二層構造を持つ気液
分離膜によって、前記目的を達成できることを見出し、
その知見に基づいて本発明を完成するに至った。SUMMARY OF THE INVENTION The object of the present invention is to provide a liquid which is liable to wet the surface of a porous structure, such as an aqueous solution containing a protein or a surfactant, as a target for gas-liquid separation. Even in such a case, it is an object of the present invention to provide a gas-liquid separation membrane in which a liquid hardly permeates into the pores of the porous structure, and does not cause gas diffusion from the gas phase to the liquid phase or hinder gas-liquid separation. The present inventor has conducted extensive studies to overcome the above-mentioned problems of the prior art. As a result, the surface on the gas phase side is a porous structure and the surface on the liquid phase side is a structure having continuous through holes. It was found that the gas-liquid separation membrane having a layered structure can achieve the above object,
The present invention has been completed based on the findings.
【０００６】[0006]
【課題を解決するための手段】かくして、本発明によれ
ば、気相側の面が多孔質構造体（ａ）であり、液相側の
面が連続貫通孔を持つ構造体（ｂ）である二層が接した
構造を含む多層構造からなることを特徴とする気液分離
膜が提供される。According to the present invention, the surface on the gas phase side is the porous structure (a) and the surface on the liquid phase side is the structure (b) having continuous through holes. There is provided a gas-liquid separation membrane having a multi-layer structure including a structure in which two layers are in contact with each other.
【０００７】以下、本発明について詳述する。撥水姓の
材料で作成された多孔質構造体は、液相が水系の場合、
通常、気液分離膜として十分に機能を発揮することがで
きるが、蛋白質や界面活性剤等を含有する液体に対して
は、接触角が低下し、濡れが生じ易くなる。一般に気液
分離膜として使用されている不織布構造や繊維−結節構
造等を有する多孔質膜では、界面張力が生じにくく、接
触角の低下に従って、徐々に溶液が孔内に浸透し易くな
る。これらの構造を有する多孔質構造体においては、孔
径を小さくしても、液体の多孔質構造体の孔内への浸透
を防ぐことは容易ではない。The present invention will be described in detail below. A porous structure made of water-repellent material, when the liquid phase is aqueous,
Usually, it can sufficiently function as a gas-liquid separation membrane, but a liquid containing a protein, a surfactant and the like has a reduced contact angle and is apt to wet. In a porous membrane having a non-woven fabric structure, a fiber-nodule structure or the like which is generally used as a gas-liquid separation membrane, interfacial tension is unlikely to occur and the solution gradually penetrates into the pores as the contact angle decreases. In the porous structure having these structures, it is not easy to prevent the liquid from permeating into the pores of the porous structure even if the pore size is reduced.
【０００８】一方、同じ材料でも連続貫通孔を持つ構造
であれば、界面張力が働き易く、また、孔径を小さくす
ることにより界面張力を大きくし、壁内への液体の浸透
を防ぐことができる。しかし、気液分離膜は、通常、気
相からのゴミや雑菌の混入の防御をも目的としており、
孔径の小さいことが求められる。ところが、微小孔径の
連続貫通孔を開けるには、コストがかかりすぎ、しか
も、微小孔径の連続貫通孔では、十分量の気体を散気す
ることができないという問題があり、連続貫通孔を持つ
構造体のみで気液分離を行うことは実用的ではない。On the other hand, if the same material has a structure having continuous through holes, the interfacial tension is likely to work, and the interfacial tension can be increased by decreasing the pore diameter to prevent the liquid from penetrating into the wall. . However, the gas-liquid separation membrane is usually also intended to prevent contamination of dust and miscellaneous bacteria from the gas phase,
A small pore size is required. However, there is a problem in that it takes too much cost to open a continuous through hole having a small hole diameter, and further, a continuous through hole having a small hole diameter cannot diffuse a sufficient amount of gas. It is not practical to perform gas-liquid separation only by the body.
【０００９】本発明では、連続貫通孔を持つ構造体は、
気液分離のために使用するのではなく、液相からの液体
が気液分離膜として使用する多孔質構造体の孔内に侵入
するのを防ぐために使用する。連続貫通孔を有する構造
体では、その孔径は、十分量の気体の液相への散気を行
うことができ、かつ、液体に対して界面張力を働かせ
て、多孔質構造体の孔内（分離膜壁内）への液の侵入が
起こらない程度の大きさとする。したがって、連続貫通
孔の孔径は、１０μｍ以上とすることが可能である。本
発明の多層構造の気液分離膜では、液相側に連続貫通孔
を持つ構造体を配し、一方、気相側には、ゴミや雑菌の
混入を防御できる微小孔径を持つ多孔質構造体を配した
構造を有しているため、濡れ性の高い液体に適用した場
合であっても、完全な気液分離を行うことができる。In the present invention, the structure having continuous through holes is
It is not used for gas-liquid separation, but is used for preventing the liquid from the liquid phase from entering the pores of the porous structure used as the gas-liquid separation membrane. In the structure having continuous through-holes, the pore size is such that a sufficient amount of gas can be diffused into the liquid phase, and the interfacial tension is exerted on the liquid so that the inside of the pores of the porous structure ( The size should be such that the liquid does not enter the separation membrane wall). Therefore, the diameter of the continuous through hole can be 10 μm or more. In the multi-layer gas-liquid separation membrane of the present invention, a structure having continuous through-holes is arranged on the liquid phase side, while on the gas phase side, a porous structure having a micropore diameter capable of preventing contamination of dust and miscellaneous bacteria. Since it has a structure in which the body is arranged, complete gas-liquid separation can be performed even when applied to a liquid having high wettability.
【００１０】液体中の蛋白質や界面活性剤等の含有量が
多い場合には、濡れ性が非常に増大するため、連続貫通
孔を持つ撥水性の構造体によって液体の侵入を防ぐに
は、連続貫通孔の孔径を非常に小さくして、界面張力を
高くしなければならない。しかし、連続貫通孔の孔径が
小さすぎると、十分量の気体を散気するのに非常に大き
な圧力を必要とする。ところが、本発明の多層構造から
なる気液分離膜では、連続貫通孔を持つ構造体の該連続
貫通孔を微小孔径にしなくても、気液分離機能や散気機
能が妨げられることはない。本発明の気液分離膜は、気
相側の面が多孔質構造体であり、液相側の面が連続貫通
孔を持つ構造体である二層が接した構造を有しているた
め、仮に、連続貫通孔を通して液体が多孔質構造体の孔
内に侵入しても、以下に述べるように、小さな圧力差で
十分量の気体を液中に散気することが可能である。When the content of protein, surfactant, etc. in the liquid is high, the wettability is greatly increased. Therefore, in order to prevent the liquid from entering with a water-repellent structure having continuous through holes, The diameter of the through hole must be made very small to increase the interfacial tension. However, if the diameter of the continuous through hole is too small, a very large pressure is required to diffuse a sufficient amount of gas. However, in the gas-liquid separation membrane having the multilayer structure of the present invention, the gas-liquid separation function and the air diffusion function are not hindered even if the continuous through-holes of the structure having the continuous through-holes are not made to have a minute hole diameter. The gas-liquid separation membrane of the present invention has a structure in which the surface on the gas phase side is a porous structure, and the surface on the liquid phase side is a structure having two continuous through-holes in contact with each other. Even if the liquid enters the pores of the porous structure through the continuous through holes, it is possible to diffuse a sufficient amount of gas into the liquid with a small pressure difference, as described below.
【００１１】多孔質構造体が直接液相に接して濡れが生
じると、多孔性の孔内に液体が侵入し、その結果、毛管
力が生じる。一般に、ゴミや雑菌の混入を防ぐため、気
液分離に用いられる多孔質構造体の孔径は、０．１〜１
０μｍ程度であり、このような小孔径における孔と液体
との間の毛管力は決して小さなものではない。一方、孔
径が１０μｍ以上の連続貫通孔を持つ構造体が液相に接
している場合には、その孔と液体との間の毛管力は、前
記に比して小さなものである。この連続孔を持つ構造体
と多孔質構造体が接しているとき、濡れ性の高い液体
は、まず連続貫通孔に侵入し、次いで、多孔質構造体の
孔に侵入すると共に、連続貫通孔を持つ構造体と多孔質
構造体との間に侵入していく。このときの連続貫通孔に
接する連続貫通孔を持つ構造体と多孔質構造体との接面
の隙間の一部が１０μｍ以上であれば、この隙間に侵入
した液体によって生じる毛管力は、連続貫通孔における
のと同等の力しかないことになる。When the porous structure comes into direct contact with the liquid phase to cause wetting, the liquid penetrates into the porous pores, resulting in a capillary force. Generally, in order to prevent contamination of dust and miscellaneous bacteria, the pore size of the porous structure used for gas-liquid separation is 0.1 to 1
It is about 0 μm, and the capillary force between the pore and the liquid in such a small pore size is not small at all. On the other hand, when a structure having continuous through holes having a pore diameter of 10 μm or more is in contact with the liquid phase, the capillary force between the holes and the liquid is smaller than the above. When the structure having the continuous pores and the porous structure are in contact with each other, the liquid having high wettability first enters the continuous through-holes, then the pores of the porous structure, and the continuous through-holes. It penetrates between the structure and the porous structure. At this time, if a part of the gap of the contact surface between the porous structure and the structure having the continuous through-hole in contact with the continuous through-hole is 10 μm or more, the capillary force generated by the liquid invading the gap will cause continuous penetration. There will be only as much force as in the holes.
【００１２】さらに、連続貫通孔を持つ構造体と多孔質
構造体とが共に撥水性であれば、それらの接面への液体
の侵入はある程度までしか進行しない。したがって、連
続貫通孔の数を調整すれば、連続貫通孔から離れた位置
では、連続貫通孔を持つ構造体と多孔質構造体との接面
には濡れは生じない。したがって、気体の散気は、濡れ
の生じていない多孔質構造体の部分から、連続貫通孔を
持つ構造体との液体が存在する接面へと、多孔質構造体
の液体の侵入した孔を通らず、行なうことができ、連続
貫通孔を持つ構造体と多孔質構造体との接面における液
体の毛管力及び連続貫通孔内における液体の毛管力に対
抗し得る程度の圧力を与えるだけで、散気が行えること
になる。Further, if both the structure having the continuous through holes and the porous structure are water repellent, the penetration of the liquid into their contact surfaces proceeds to some extent. Therefore, if the number of the continuous through holes is adjusted, the contact surface between the structure having the continuous through holes and the porous structure does not get wet at a position apart from the continuous through holes. Therefore, the gas diffuses from the part of the porous structure that is not wetted to the contact surface where the liquid with the structure having the continuous through-holes exists and the pores into which the liquid of the porous structure penetrates. It can be carried out without passing through, and only by applying a pressure sufficient to counter the capillary force of the liquid at the contact surface between the structure having the continuous through holes and the porous structure and the capillary force of the liquid in the continuous through holes. , Aeration will be possible.
【００１３】本発明で使用する多孔質構造体としては、
撥水性材料から形成されたものが好ましく、例えば、ポ
リエチレン、ポリプロピレン、シリコーン系の樹脂とゴ
ム、フッ素樹脂等を用いて、延伸法、造孔剤法等により
作成された多孔質構造や不織布構造等を有するものを用
いることができる。これらの多孔質構造体は、連続貫通
孔を有しないものである。また、撥水性を有しない材料
により作成された多孔質構造体であっても、表面にシリ
コーン樹脂、フッ素樹脂等を被覆して、撥水性を付与し
たものを用いることができる。As the porous structure used in the present invention,
Those formed of a water-repellent material are preferable, for example, a porous structure or a non-woven structure formed by a stretching method, a pore-forming method, etc., using polyethylene, polypropylene, a silicone-based resin and rubber, a fluororesin or the like. Can be used. These porous structures do not have continuous through holes. Further, even a porous structure made of a material having no water repellency can be used, which has water repellency obtained by coating the surface with a silicone resin, a fluororesin or the like.
【００１４】本発明で使用する連続貫通孔を持つ構造体
としては、撥水性材料から形成されたものが好ましい。
連続貫通孔は、通常、孔径１０μｍ以上とする。連続貫
通孔の孔径が小さすぎると、散気機能が低下する。連続
貫通孔の孔径の上限は、界面張力が働いて、濡れ性のあ
る液体が侵入し難い程度とする。したがって、この孔径
は、一般に、１０〜１５００μｍ、好ましくは５０〜１
０００μｍ、より好ましくは１００〜５００μｍ程度と
することが望ましい。孔径を大きくすれば、連続貫通孔
の数を少なくしても、散気機能が阻害されることはな
い。The structure having continuous through holes used in the present invention is preferably made of a water repellent material.
The diameter of the continuous through hole is usually 10 μm or more. If the diameter of the continuous through holes is too small, the air diffusing function deteriorates. The upper limit of the diameter of the continuous through-hole is set such that interfacial tension acts and a wettable liquid is unlikely to enter. Therefore, this pore size is generally 10 to 1500 μm, preferably 50 to 1 μm.
It is desirable that the thickness is 000 μm, more preferably about 100 to 500 μm. If the hole diameter is increased, the aeration function will not be hindered even if the number of continuous through holes is reduced.
【００１５】連続貫通孔を持つ構造体は、無孔質のフィ
ルムに連続貫通孔を開けたものや、１０μｍ以下の孔径
を持つ多孔質膜に連続貫通孔を開孔したもの等を用いる
ことができる。また、前記多孔質構造体と同様、撥水性
を有しない材料から作成された連続貫通孔を持つ構造体
であっても、表面に撥水性の材料を被覆することにより
撥水性を付与して使用することができる。撥水性材料及
び被覆材料としては、特に、ポリテトラフルオロエチレ
ン、テトラフルオロエチレン／ヘキサフルオロプロピレ
ン共重合体、及びテトラフルオロエチレン／パーフルオ
ロアルキルビニルエーテル共重合体が、水との接触角が
大きく適している。As the structure having continuous through-holes, it is possible to use a non-porous film having continuous through-holes or a porous film having a pore size of 10 μm or less and having continuous through-holes. it can. Further, similar to the porous structure, even a structure having continuous through holes made of a material having no water repellency is used by imparting water repellency by coating the surface with a water repellent material. can do. As the water repellent material and the coating material, polytetrafluoroethylene, tetrafluoroethylene / hexafluoropropylene copolymer, and tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer are particularly suitable because of their large contact angle with water. There is.
【００１６】多孔質構造体と連続貫通孔を持つ構造体の
二層は、接した状態とするが、連続貫通孔に接する接面
の一部に１０μｍ以上の間隙が開くようにすることが望
ましい。この間隔は、好ましくは１０〜１０００μｍ、
より好ましくは５０〜５００μｍ程度とすることが望ま
しい。このような多層構造を作成するには、単に連続貫
通孔を持つ構造体と多孔質構造体とを重ね、周囲をＯリ
ング等にて密着させるだけでもよいし、材料の融点以上
に加熱しながら圧着させるだけでもよく、これによっ
て、低い圧力での散気を行うことが可能である。この連
続貫通孔を持つ構造体と多孔質構造体は、各々気相側及
び液相側に接して二層構造をとっておればよく、強度保
持等の目的で不織布等をさらに気相側及び／または液相
側に重ねた多層構造としてもよい。The two layers of the porous structure and the structure having continuous through holes are in contact with each other, but it is desirable that a gap of 10 μm or more is opened in a part of the contact surface in contact with the continuous through holes. . This interval is preferably 10 to 1000 μm,
It is more preferable that the thickness is about 50 to 500 μm. In order to create such a multilayer structure, the structure having continuous through holes and the porous structure may simply be overlapped with each other and the periphery thereof may be adhered by an O-ring or the like, or while heating above the melting point of the material. Only crimping is required, which allows air to be diffused at a low pressure. The structure having the continuous through holes and the porous structure may have a two-layer structure in contact with the gas phase side and the liquid phase side, respectively. It may have a multi-layer structure in which the liquid phase side is stacked.
【００１７】[0017]
【実施例】以下に、実施例及び比較例を挙げて、本発明
についてさらに具体的に説明するが、本発明は、これら
の実施例のみに限定されるものではない。EXAMPLES The present invention will be described in more detail below with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples.
【００１８】［比較例１］孔径１μｍのポリテトラフル
オロエチレン多孔質膜（ポアフロン、住友電工社製）を
１３ｍｍφに打ち抜き、ステンレス製ホルダーにセット
した。このホルダーの上部に、濃度０．５ｍｇ／ｍｌの
プロピレングリコール（関東化学社製）水溶液が５００
ｍｌ入ったびんをセットし、１分後よりホルダーの下方
から陽圧を加えて、液中に散気が行われ始めた時点の圧
を測定したところ０．０５９ｋｇ／ｃｍ2であった。[Comparative Example 1] A polytetrafluoroethylene porous membrane (POREFLON, manufactured by Sumitomo Electric Industries, Ltd.) having a pore diameter of 1 µm was punched out to 13 mmφ and set in a stainless steel holder. On the top of this holder, 500 propylene glycol (Kanto Chemical Co., Inc.) aqueous solution with a concentration of 0.5 mg / ml was added
A bottle containing ml was set, and after 1 minute, a positive pressure was applied from the lower side of the holder to measure the pressure at the time when diffusing was started in the liquid, and it was 0.059 kg / cm 2 .
【００１９】［実施例１］５０μｍ厚のポリテトラフル
オロエチレンシート（テフロンテープ、ニチアス社製）
を１３ｍｍφに打ち抜き、１００μｍ孔２５個、２００
μｍ孔６個、及び２５０μｍ孔３個の連続貫通孔を各々
開孔した。各々の連続貫通孔を持つポリテトラフルオロ
エチレンシートを孔径１μｍのポリテトラフルオロエチ
レン多孔質膜の上に重ねてホルダーにセットした。この
ホルダーの上部に、濃度０．５ｍｇ／ｍｌのプロピレン
グリコールの入ったびんをセットし、１分後よりホルダ
ーの下方から陽圧を加え、液中に散気が行われ始めた時
点の圧を測定したところ、各々０．０３２、０．０３
２、及び０．０３５ｋｇ／ｃｍ2となり、比較例１に比
べ低い圧力差にて散気が行われることを確認した。[Example 1] Polytetrafluoroethylene sheet having a thickness of 50 µm (Teflon tape, manufactured by Nichias)
Punched to 13 mmφ, 25 holes of 100 μm, 200
Six continuous through holes each having 6 μm holes and three 250 μm holes were opened. A polytetrafluoroethylene sheet having continuous through holes was placed on a polytetrafluoroethylene porous membrane having a pore diameter of 1 μm and set in a holder. A bottle containing propylene glycol with a concentration of 0.5 mg / ml was set on the top of this holder, and after 1 minute, a positive pressure was applied from the bottom of the holder to adjust the pressure at the time when air diffused into the liquid. When measured, 0.032 and 0.03 respectively
It was 2 and 0.035 kg / cm 2 , and it was confirmed that air was diffused at a pressure difference lower than that of Comparative Example 1.
【００２０】［実施例２］孔径１μｍのポリテトラフル
オロエチレン多孔質膜を１３ｍｍφに打ち抜き、５００
μｍ孔３個の連続貫通孔を開孔した。この連続貫通孔を
持つポリテトラフルオロエチレン多孔質膜と、開孔して
いない孔径１μｍのポリテトラフルオロエチレン多孔質
膜とを圧着し、３２７℃以上の温度に３０秒間放置し
て、二層構造とした。この二層構造膜をホルダーにセッ
トした。このホルダーの上部に、濃度０．５ｍｇ／ｍｌ
のプロピレングリコールの入ったびんをセットし、１分
後よりホルダーの下方から陽圧を加え、液中に散気が行
われ始めた時点の圧を測定したところ、０．０３３ｋｇ
／ｃｍ2となり、比較例１に比べ低い圧力差にて散気が
行われることを確認した。[Example 2] A polytetrafluoroethylene porous membrane having a pore size of 1 µm was punched out to a diameter of 13 mm and 500
Three continuous through-holes were opened. The polytetrafluoroethylene porous membrane having the continuous through holes and the non-opened polytetrafluoroethylene porous membrane having a pore diameter of 1 μm are pressure-bonded and left at a temperature of 327 ° C. or higher for 30 seconds to form a two-layer structure. And This two-layer structure film was set in a holder. At the top of this holder, a concentration of 0.5 mg / ml
After setting the bottle containing the propylene glycol, the positive pressure was applied from the bottom of the holder from 1 minute later, and the pressure at the time when the air diffused into the liquid was measured.
/ Cm 2 , and it was confirmed that air was diffused with a lower pressure difference than in Comparative Example 1.
【００２１】[0021]
【発明の効果】本発明によれば、蛋白質や界面活性剤等
を含有する水溶液のように、多孔質構造体の表面に濡れ
を生じ易い液体を気液分離の対象とする場合であって
も、多孔質構造体の孔内に液体が浸透しにくく、気相か
ら液相への散気や気液分離に支障を生じることがない気
液分離膜が提供される。According to the present invention, even when a liquid which easily wets the surface of the porous structure, such as an aqueous solution containing a protein or a surfactant, is targeted for gas-liquid separation. Provided is a gas-liquid separation membrane in which liquid does not easily permeate into the pores of the porous structure and does not hinder air diffusion from the gas phase to the liquid phase or gas-liquid separation.
Claims (2)
り、液相側の面が連続貫通孔を持つ構造体（ｂ）である
二層が接した構造を含む多層構造からなることを特徴と
する気液分離膜。1. A multi-layer structure including a structure in which two layers are in contact with each other, wherein a surface on a vapor phase side is a porous structure (a) and a surface on a liquid phase side is a structure (b) having continuous through holes A gas-liquid separation membrane characterized in that
つ構造体（ｂ）が、撥水性材料によって形成されたもの
であるか、あるいは撥水性材料を被覆して撥水性を付与
したものである請求項１記載の気液分離膜。2. The porous structure (a) and the structure (b) having continuous through holes are formed of a water repellent material, or coated with a water repellent material to impart water repellency. The gas-liquid separation membrane according to claim 1, which is one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29448093A JPH07124452A (en) | 1993-10-29 | 1993-10-29 | Gas-liquid separation membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29448093A JPH07124452A (en) | 1993-10-29 | 1993-10-29 | Gas-liquid separation membrane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07124452A true JPH07124452A (en) | 1995-05-16 |
Family
ID=17808316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29448093A Pending JPH07124452A (en) | 1993-10-29 | 1993-10-29 | Gas-liquid separation membrane |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07124452A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6613131B2 (en) | 2001-09-20 | 2003-09-02 | Canon Kabushiki Kaisha | Gas-liquid separation membrane and production method thereof |
| US7544434B2 (en) * | 2002-03-29 | 2009-06-09 | Kabushiki Kaisha Toshiba | Direct liquid fuel cell power generating device and method of controlling the same |
-
1993
- 1993-10-29 JP JP29448093A patent/JPH07124452A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6613131B2 (en) | 2001-09-20 | 2003-09-02 | Canon Kabushiki Kaisha | Gas-liquid separation membrane and production method thereof |
| US7544434B2 (en) * | 2002-03-29 | 2009-06-09 | Kabushiki Kaisha Toshiba | Direct liquid fuel cell power generating device and method of controlling the same |
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