WO2018139473A1 - 炭素被膜の製造方法および被膜の製造方法 - Google Patents
炭素被膜の製造方法および被膜の製造方法 Download PDFInfo
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- WO2018139473A1 WO2018139473A1 PCT/JP2018/002062 JP2018002062W WO2018139473A1 WO 2018139473 A1 WO2018139473 A1 WO 2018139473A1 JP 2018002062 W JP2018002062 W JP 2018002062W WO 2018139473 A1 WO2018139473 A1 WO 2018139473A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
- B01D39/2055—Carbonaceous material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0039—Inorganic membrane manufacture
- B01D67/0069—Inorganic membrane manufacture by deposition from the liquid phase, e.g. electrochemical deposition
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/02—Inorganic material
- B01D71/021—Carbon
- B01D71/0211—Graphene or derivates thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/02—Inorganic material
- B01D71/021—Carbon
- B01D71/0212—Carbon nanotubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/02—Inorganic material
- B01D71/024—Oxides
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/182—Graphene
- C01B32/198—Graphene oxide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/04—Additives and treatments of the filtering material
- B01D2239/0471—Surface coating material
- B01D2239/0478—Surface coating material on a layer of the filter
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0081—After-treatment of organic or inorganic membranes
- B01D67/0083—Thermal after-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0081—After-treatment of organic or inorganic membranes
- B01D67/0095—Drying
Definitions
- the present invention relates to a method for forming a thin film mainly composed of carbon on a support having a predetermined shape.
- the present invention also relates to a method for forming a thin film made of a predetermined material on a support.
- a carbon film was formed on a support such as a membrane filter, and fine pores were formed in the carbon film to obtain a filter.
- a support such as a membrane filter
- an OX-NH ethanol dispersion liquid in which carbon nanohorns are dispersed in ethanol at a predetermined concentration is prepared as a coating liquid.
- a membrane filter to be a support 2 (see FIG. 1) is set in the filter holder 5, and the coating liquid 1 is injected with a syringe 6. At this time, the thickness of the carbon film can be precisely controlled by accurately injecting the injection amount determined from the concentration of the coating liquid 1.
- the filter holder 5 is dried in an oven at 90 ° C. to form a carbon film on the support 2.
- a vacuum dryer cannot be used in place of the oven.
- the support 2 and the carbon film are taken out from the filter holder 5, and the carbon film can be used by oxidizing the carbon film to form fine holes to form a carbon filter.
- the carbon filter sample thus formed was returned to the filter holder 5 and passed through an ionic solution, which was used for an ion selectivity measurement test or the like.
- the surface opposite to the surface in contact with the support 2 has an uneven shape along the shape of the parts of the filter holder 5 other than the support 2.
- the thickness of the carbon coating has become uneven and the quality has deteriorated.
- the unevenness of the carbon coating (carbon filter) surface matches the shape of the filter holder 5. It was necessary to attach to and took time and effort.
- Patent Document 1 provides a catalyst ink in which catalyst supporting particles (platinum supporting carbon) and ionomer as materials are dispersed in a solvent and adjusted to a desired viscosity.
- catalyst supporting particles platinum supporting carbon
- ionomer ionomer as materials are dispersed in a solvent and adjusted to a desired viscosity.
- an invention is disclosed in which the catalyst ink is applied onto an electrolyte membrane serving as a support by a die coating method and dried to form a catalyst electrode layer.
- it is necessary to make the catalyst ink have a desired viscosity in order to achieve the strength and performance of the carbon coating (electrode), which is troublesome.
- the film was formed by the die coating method, it was necessary to move the support at a constant speed with respect to the die coater when applying the catalyst ink.
- Patent Document 2 a carbon material is dispersed in a solvent to which a basic polymer dispersant is added, and a carbon material is electrodeposited by applying a voltage with the support as an anode in the solvent.
- An invention for forming a carbon coating is disclosed.
- the production cost of the carbon coating has been increased.
- Patent Document 3 carbon particles and a resin are dispersed in a solvent, dispersed while applying a voltage to the dispersion (electrostatic spinning), and the solvent is volatilized in the air, on the collector to be a support.
- An invention for forming a nonwoven fabric is disclosed.
- the method of Patent Document 3 requires a special device that scatters while applying a voltage to the dispersion, which increases the manufacturing cost.
- the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a method for forming a carbon film having a uniform thickness and other films easily at low cost.
- 1st invention is the manufacturing method of the carbon film which forms the film which has carbon as a main component on the support body of predetermined shape, Comprising: The said support which consists of a hydrophilic material on the base which consists of a hydrophobic material A body is arranged, and a coating liquid in which a carbon material is dispersed in a polar solvent is supplied onto the support and dried.
- a second invention is a carbon film manufacturing method for forming a film mainly composed of carbon on a support having a predetermined shape, and is a planar shape circumscribing the side periphery of the support and having a predetermined height.
- a packing is disposed around the support, and a coating liquid in which a carbon material is dispersed is supplied onto the support and dried.
- 3rd invention is a manufacturing method of the carbon film which forms the film which has carbon as a main component on the support body of predetermined shape, Comprising: The said support which consists of a lipophilic material on the base which consists of an oleophobic material A body is disposed, and a coating liquid in which a carbon material is dispersed in a nonpolar solvent is supplied onto the support and dried.
- 4th invention is a manufacturing method of the film which forms the film which has a predetermined film material as a main ingredient on a support of predetermined shape, and consists of a hydrophilic material on a base which consists of a hydrophobic material
- the support is disposed, and a coating liquid in which the coating material is dispersed in a polar solvent is supplied onto the support and dried.
- a film manufacturing method for forming a film having a predetermined film material as a main component on a support having a predetermined shape, wherein the film has a planar shape circumscribing the side periphery of the support and has a predetermined height.
- the packing is arranged around the support, and the coating liquid in which the coating material is dispersed is supplied onto the support and dried.
- 6th invention is a manufacturing method of the film which forms the film which has a predetermined film material as a main ingredient on a support of predetermined shape, and consists of a lipophilic material on a base which consists of an oleophobic material
- the support is disposed, and a coating liquid in which the coating material is dispersed in a nonpolar solvent is supplied onto the support and dried.
- the support made of a hydrophilic material is disposed on a base made of a hydrophobic material, and a coating liquid in which a carbon material is dispersed in a polar solvent is supplied onto the support.
- a carbon film having a uniform thickness with no spots can be easily formed.
- a coating liquid in which a packing having a planar shape circumscribing the side periphery of the support and having a predetermined height is disposed around the support, and a carbon material is dispersed on the support.
- the support made of a lipophilic material is disposed on a base made of an oleophobic material, and a coating liquid in which a carbon material is dispersed in a nonpolar solvent is supplied onto the support.
- a coating liquid in which a carbon material is dispersed in a nonpolar solvent is supplied onto the support.
- the support made of a hydrophilic material is disposed on a base made of a hydrophobic material, and a coating liquid in which the coating material is dispersed in a polar solvent is supplied onto the support.
- a coating liquid in which the coating material is dispersed in a polar solvent is supplied onto the support.
- a packing having a planar shape circumscribing the side periphery of the support and having a predetermined height is disposed around the support, and the coating liquid in which the coating material is dispersed is disposed on the support.
- the said support body which consists of lipophilic material is arrange
- a coating liquid 1 in which a carbon material for forming a carbon film is dispersed at a predetermined concentration is prepared.
- the carbon material carbon nanomaterials such as carbon nanohorn, carbon nanotube, and graphene oxide, carbon black, and the like can be used.
- the solvent of the coating liquid 1 is a highly polar solvent, and water, ethanol, methanol or the like can be used.
- a graphene oxide (GO) aqueous dispersion in which graphene oxide is dispersed in ultrapure water is used as the coating liquid.
- nanohorn oxide (OX-NH) ethanol dispersion, carbon nanotube (CNT) ethanol dispersion, and the like can also be used.
- the carbon coating support 2 is required to have hydrophilic and relatively uniform pores, and a membrane filter, a ceramic sintered filter, or the like can be used.
- a membrane filter made of polycarbonate was used in the first embodiment.
- the packing 3 it is necessary to be water-tight and it is difficult for the coating liquid to adhere, and silicon, Teflon (registered trademark), or the like can be used.
- the shape of the packing 3 is a shape circumscribing the immediate circumference of the support and needs to have a predetermined height that can prevent the coating liquid 1 from leaking and can hold the layer of the coating liquid 1.
- the annular silicon packing 3 circumscribing the circular support 2 is used.
- the height of the packing 3 is set higher than the thickness of the support 2.
- the packing 3 is disposed on the side periphery of the support 2, and then the coating liquid 1 is supplied onto the support 2. As shown in FIG. 1B, the packing 3 prevents the coating liquid 1 from leaking and the upper side of the support 2 is opened, so that the surface of the coating liquid 1 is held by surface tension. It becomes.
- the coating liquid 1 is dried. Drying is performed by heating to 90 ° C. in an oven. Drying with a vacuum dryer is also possible.
- the carbon film thus obtained can be used for various applications in addition to a filter having ion selectivity.
- a carbon film having a uniform thickness with no spots can be easily formed. Moreover, even if it is a case where the coating liquid 1 with a low carbon concentration and the coating liquid 1 with a low viscosity are used, a carbon film can be formed easily.
- the filter can be oxidized by holding an aqueous oxidizer solution such as hydrogen peroxide water on the filter made from this carbon coating with surface tension.
- aqueous oxidizer solution such as hydrogen peroxide water
- various treatments can be performed by holding the solution with surface tension on the filter.
- the carbon film manufacturing method according to the second embodiment includes a base 4 made of a hydrophobic material, a support 2 made of a hydrophilic material, and a coat in which the carbon material is dispersed in a polar solvent.
- the liquid 1 is used.
- a carbon material is dispersed at a predetermined concentration as in the first embodiment.
- the solvent of the coating liquid 1 needs to be a polar solvent having a dielectric constant of 6 or more, and water, ethanol, methanol or the like can be used.
- a graphene oxide aqueous dispersion in which graphene oxide is dispersed in ultrapure water is used.
- the base 4 is preferably a plate material made of a hydrophobic material and having a sufficiently large area with respect to the support 2.
- the hydrophobic material means a material that repels a polar solvent on the surface, and includes materials having water repellency by surface treatment or the like in addition to materials having a lower affinity with the polar solvent than the support 2.
- the base 4 made of Teflon (registered trademark) is used.
- the support 2 is made of a hydrophilic material, and has a role of holding the carbon film as in the first embodiment.
- the hydrophilic material means a material that adsorbs the polar solvent without repelling on the surface, and a material having higher affinity with the polar solvent than the base 4 can be used.
- a membrane filter, porous glass, or the like can be used as an example of the hydrophilic material.
- a polycarbonate membrane filter was used as the support 2.
- the support body 2 is disposed on the base 4, and then the coating liquid 1 is supplied onto the support body 2.
- the coating liquid 1 is repelled by the base 4, it does not spill out of the support 2 made of a hydrophilic material and is held on the support 2 by surface tension. In this state, the coating liquid 1 is dried. About a drying process, it is the same as that of 1st embodiment.
- a carbon film having a uniform thickness with no spots can be easily formed.
- the shape of a carbon film can be controlled by the shape of the support body 2 and the base 4, the freedom degree of the shape of a carbon film improves.
- the plurality of supports 2 side by side on the base 4 having a large area a large number of carbon coatings can be simultaneously produced.
- a carbon film can be formed easily. Therefore, the film thickness of the carbon coating can be reduced. Specifically, when graphene oxide was used as the carbon material, a carbon film of 0.1 ⁇ g / cm 2 could be formed.
- a base 4 made of an oleophobic material, a support 2 made of a lipophilic material, and carbon A coating liquid 1 in which a material is dispersed in a nonpolar solvent is used.
- the carbon material is dispersed at a predetermined concentration as in the first embodiment.
- the solvent for the coating liquid 1 must be a nonpolar solvent having a dielectric constant of less than 6, and hexane, diethyl ether, or the like can be used.
- the base 4 is preferably a plate material made of an oleophobic material and having a sufficiently wide area with respect to the support 2.
- the oleophobic material means a material that repels a nonpolar solvent on the surface.
- the affinity with the nonpolar solvent has been reduced by surface treatment or the like.
- cellulose, glass, a membrane filter subjected to hydrophilic treatment, and the like can be used.
- the support 2 is made of an oleophilic material and has a role of holding the carbon film as in the first embodiment.
- the lipophilic material means a material that adsorbs the nonpolar solvent without repelling on the surface, and a material having higher affinity with the nonpolar solvent than the base 4 can be used.
- Teflon registered trademark
- the lipophilic material Teflon (registered trademark) or the like can be used.
- the support body 2 is disposed on the base 4, and then the coating liquid 1 is supplied onto the support body 2.
- the coating liquid 1 is repelled by the base 4, it does not spill out of the support 2 made of a lipophilic material and is held on the support 2 by surface tension. In this state, the coating liquid 1 is dried.
- the drying step is almost the same as in the first embodiment, but is performed at an appropriate temperature and condition depending on the type of nonpolar solvent.
- the carbon film manufacturing method of the third embodiment it is possible to easily form a carbon film having a uniform thickness without spots. Moreover, since the shape of a carbon film can be controlled by the shape of the support body 2 and the base 4, the freedom degree of the shape of a carbon film improves. By arranging the plurality of supports 2 side by side on the base 4 having a large area, a large number of carbon coatings can be simultaneously produced. Moreover, according to this method, even if it is a case where the coating liquid 1 with a low carbon concentration and the coating liquid 1 with a low viscosity are used, a carbon film can be formed easily. Therefore, the film thickness of the carbon coating can be reduced. Specifically, when graphene oxide was used as the carbon material, a carbon film of 0.1 ⁇ g / cm 2 could be formed.
- the present invention can also be applied to manufacturing a coating other than a carbon coating.
- various coating films can be produced by using a coating liquid in which a material other than the carbon material is dispersed instead of the coating liquid 1 in which the carbon material is dispersed. it can.
- a coating liquid in which a carbon material and other additives are mixed and dispersed in a solvent can also be used.
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Abstract
Description
また、本発明は、支持体上に所定材料からなる薄い被膜を形成する方法に関する。
従来、炭素被膜を形成するには、コート液として、カーボンナノホーンを所定の濃度でエタノールに分散させたOX-NHエタノール分散液を用意する。
図3に示すように、支持体2(図1参照)となるメンブレンフィルターをフィルターホルダー5にセットし、シリンジ6でコート液1を注入する。このとき、コート液1の濃度から決められる注入量を正確に注入することにより、炭素被膜の厚さを精密にコントロールすることができる。
この際、フィルターホルダー5内部からコート液1が逆流するのを防ぐため、オーブンの代わりに真空乾燥器を使用することはできない。
このように形成した炭素フィルターのサンプルは、フィルターホルダー5に戻され、イオン溶液を通過させ、イオン選択性の測定試験等に用いられていた。
そのため、炭素被膜の厚さに斑が生じて品質が低下してしまっていた。
また、炭素被膜の酸化処理等のためにフィルターホルダー5から支持体2および炭素被膜を取り出し、フィルターホルダー5に戻す際、炭素被膜(炭素フィルター)表面の凹凸がフィルターホルダー5の形状に合致するように取り付ける必要があり、手間がかかっていた。
特許文献1の方法では、炭素被膜(電極)の強度および性能を達成するために触媒インクを所望の粘度にする必要があり、手間がかかっていた。また、ダイコート法によって膜を形成していたため、触媒インクの塗布時に支持体をダイコータに対して一定速度で動かす必要があった。
特許文献2の方法では、塩基性高分子型分散剤を使用したり、電圧を印加したりする必要があったため、炭素被膜の製造コストが高くなってしまっていた。また、膜厚を厚くするためには、電着、洗浄、乾燥の工程を繰り返す必要があったため、手間がかかっていた。
特許文献3の方法では、分散液に電圧を印加しながら飛散させる特殊な装置が必要であり、製造コストが高くなってしまっていた。
第1の発明は、所定の形状の支持体上に炭素を主成分とする被膜を形成する炭素被膜の製造方法であって、疎水性材料からなる基台の上に親水性材料からなる上記支持体を配置し、炭素材料を極性溶媒に分散させたコート液を上記支持体上に供給して乾燥させることを特徴とする。
以下、本発明の第一実施形態に係る炭素被膜の製造方法について説明する。
この方法は、図1に示すように、支持体2の側周をパッキン3で覆い、支持体上にコート液1を供給して層を形成し、乾燥させて炭素被膜を形成することを特徴とする。
炭素材料としては、カーボンナノホーン、カーボンナノチューブ、グラフェンオキサイド、などのカーボンナノ素材やカーボンブラックなどを用いることができる。
また、コート液1の溶媒としては高極性溶媒が条件となり、水、エタノール、メタノールなどを用いることができる。
第一実施形態では、コート液として、グラフェンオキサイドを超純水に分散させたグラフェンオキサイド(GO)水分散液を用いた。
このほかに、ナノホーンオキサイド(OX-NH)エタノール分散液、カーボンナノチューブ(CNT)エタノール分散液なども用いることができる。
このような支持体2として、第一実施形態ではポリカーボネイト製のメンブレンフィルターを用いた。
パッキン3の形状は、支持体の即周に外接する形状でコート液1の漏れを防ぐとともに、コート液1の層を保持できる所定の高さを有する必要がある。
第一実施形態では、円形の支持体2に外接する環状のシリコンパッキン3を用いた。パッキン3の高さは支持体2の厚さよりも高く設定されている。
図1(b)に示すように、パッキン3によってコート液1の液漏れが防止されるとともに、支持体2の上方が開放されているため、コート液1の表面は表面張力で保持された状態となる。
乾燥は、オーブンで90℃に加熱して行う。真空乾燥器による乾燥も可能である。
このようにして得られた炭素被膜は、イオン選択性を有するフィルターのほか、様々な用途に用いることができる。
また、炭素濃度の低いコート液1や粘度の低いコート液1を用いる場合であっても、容易に炭素被膜を形成することができる。
第二実施形態に係る炭素被膜の製造方法は、図2に示すように、疎水性材料からなる基台4と、親水性材料からなる支持体2と、炭素材料を極性溶媒に分散させたコート液1とを用いることを特徴とする。
コート液1の溶媒としては、誘電率が6以上の極性溶媒である必要があり、水、エタノール、メタノールなどを用いることができる。
第二実施形態では、グラフェンオキサイドを超純水に分散させたグラフェンオキサイド水分散液を用いた。
疎水性材料とは表面で極性溶媒をはじく材料を意味し、支持体2よりも極性溶媒との親和性が低い材料のほか、表面処理等によって撥水性を備えたものも含む。
第二実施形態では、テフロン(登録商標)からなる基台4を用いた。
親水性材料とは表面で極性溶媒をはじかず吸着させる材料を意味し、基台4よりも極性溶媒との親和性が高い材料などを用いることができる。親水性材料の例として、メンブレンフィルター、ポーラスガラスなどを用いることができる。
第二実施形態では、支持体2としてポリカーボネイト製メンブレンフィルターを用いた。
図2(b)に示すように、コート液1は基台4にはじかれるため親水性材料からなる支持体2の外にこぼれ出ることはなく、表面張力によって支持体2上に保持される。
このままの状態で、コート液1を乾燥させる。乾燥工程については第一実施形態と同様である。
また、支持体2と基台4との形状によって炭素被膜の形状をコントロールできるため、炭素被膜の形状の自由度が向上する。
面積の大きな基台4上に複数の支持体2を並べて配置することによって、同時に多数の炭素被膜を製造することもできる。
また、炭素濃度の低いコート液1や粘度の低いコート液1を用いる場合であっても、容易に炭素被膜を形成することができる。
そのため、炭素被膜の膜厚を薄くすることもできる。具体的には、炭素材料としてグラフェンオキサイドを用いた場合で、0.1μg/cm2の炭素被膜を形成することができた。
第三実施形態に係る炭素被膜の製造方法は、図2に示すように、第二実施形態とは逆に、疎油性材料からなる基台4と、親油性材料からなる支持体2と、炭素材料を無極性溶媒に分散させたコート液1とを用いることを特徴とする。
コート液1の溶媒としては、誘電率が6未満の無極性溶媒である必要があり、ヘキサン、ジエチルエーテルなどを用いることができる。
疎油性材料とは表面で無極性溶媒をはじく材料を意味し、支持体2よりも無極性溶媒との親和性が低い材料のほか、表面処理等によって無極性溶媒との親和性を低下させたものも含む。疎油性材料の例として、セルロース、ガラス、親水処理したメンブレンフィルターなどを用いることができる。
親油性材料とは表面で無極性溶媒をはじかず吸着させる材料を意味し、基台4よりも無極性溶媒との親和性が高い材料などを用いることができる。親油性材料の例として、テフロン(登録商標)などを用いることができる。
図2(b)に示すように、コート液1は基台4にはじかれるため親油性材料からなる支持体2の外にこぼれ出ることはなく、表面張力によって支持体2上に保持される。
このままの状態で、コート液1を乾燥させる。乾燥工程については第一実施形態とほぼ同様であるが、無極性溶媒の種類に応じて適切な温度および条件下で行う。
また、支持体2と基台4との形状によって炭素被膜の形状をコントロールできるため、炭素被膜の形状の自由度が向上する。
面積の大きな基台4上に複数の支持体2を並べて配置することによって、同時に多数の炭素被膜を製造することもできる。
また、本方法によれば、炭素濃度の低いコート液1や粘度の低いコート液1を用いる場合であっても、容易に炭素被膜を形成することができる。
そのため、炭素被膜の膜厚を薄くすることもできる。具体的には、炭素材料としてグラフェンオキサイドを用いた場合で、0.1μg/cm2の炭素被膜を形成することができた。
第一実施形態から第三実施形態の方法において、炭素材料を分散させたコート液1の代わりに、炭素材料以外の材料を分散させたコート液を用いることで、様々な被膜を製造することができる。また、炭素材料および他の添加物を混合して溶媒に分散させたコート液を用いることもできる。
2 支持体
3 パッキン
4 基台
5 フィルターホルダー
6 シリンジ
Claims (6)
- 所定の形状の支持体上に炭素を主成分とする被膜を形成する炭素被膜の製造方法であって、
疎水性材料からなる基台の上に親水性材料からなる上記支持体を配置し、
炭素材料を極性溶媒に分散させたコート液を上記支持体上に供給して乾燥させることを特徴とする炭素被膜の製造方法。 - 所定の形状の支持体上に炭素を主成分とする被膜を形成する炭素被膜の製造方法であって、
上記支持体の側周に外接する平面形状で且つ所定高さのパッキンを上記支持体の周囲に配置し、
炭素材料を分散させたコート液を上記支持体上に供給して乾燥させることを特徴とする炭素被膜の製造方法。 - 所定の形状の支持体上に炭素を主成分とする被膜を形成する炭素被膜の製造方法であって、
疎油性材料からなる基台の上に親油性材料からなる上記支持体を配置し、
炭素材料を無極性溶媒に分散させたコート液を上記支持体上に供給して乾燥させることを特徴とする炭素被膜の製造方法。 - 所定の形状の支持体上に所定の被膜材料を主成分とする被膜を形成する被膜の製造方法であって、
疎水性材料からなる基台の上に親水性材料からなる上記支持体を配置し、
上記被膜材料を極性溶媒に分散させたコート液を上記支持体上に供給して乾燥させることを特徴とする被膜の製造方法。 - 所定の形状の支持体上に所定の被膜材料を主成分とする被膜を形成する被膜の製造方法であって、
上記支持体の側周に外接する平面形状で且つ所定高さのパッキンを上記支持体の周囲に配置し、
上記被膜材料を分散させたコート液を上記支持体上に供給して乾燥させることを特徴とする被膜の製造方法。 - 所定の形状の支持体上に所定の被膜材料を主成分とする被膜を形成する被膜の製造方法であって、
疎油性材料からなる基台の上に親油性材料からなる上記支持体を配置し、
上記被膜材料を無極性溶媒に分散させたコート液を上記支持体上に供給して乾燥させることを特徴とする被膜の製造方法。
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