WO2016089055A1 - Structure de membrane de séparation nanoscopique et son procédé de fabrication - Google Patents

Structure de membrane de séparation nanoscopique et son procédé de fabrication Download PDF

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Publication number
WO2016089055A1
WO2016089055A1 PCT/KR2015/012901 KR2015012901W WO2016089055A1 WO 2016089055 A1 WO2016089055 A1 WO 2016089055A1 KR 2015012901 W KR2015012901 W KR 2015012901W WO 2016089055 A1 WO2016089055 A1 WO 2016089055A1
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layered structure
nano
channel
support
fluid
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PCT/KR2015/012901
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English (en)
Korean (ko)
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한창수
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고려대학교 산학협력단
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/12—Composite membranes; Ultra-thin membranes
    • B01D69/1213—Laminated layers
    • 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
    • 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
    • B01D67/0088—Physical treatment with compounds, e.g. swelling, coating or impregnation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/10—Supported membranes; Membrane supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/12—Composite membranes; Ultra-thin membranes
    • B01D69/1216—Three or more layers
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2313/00—Details relating to membrane modules or apparatus
    • B01D2313/14—Specific spacers

Definitions

  • the present invention relates to a nano-membrane structure and a method for manufacturing the same, and more particularly, to a nano-membrane structure capable of filtering a part of a fluid, such as gas or liquid, and a method for producing the nano-membrane structure.
  • Membranes of various sizes are widely used, such as gas separation membranes for separating carbon dioxide or other harmful gases, and liquid separation membranes for separating specific ions and impurities.
  • a membrane in order to purify seawater, a membrane is used in a reverse osmosis method using a membrane having pores of a very small size.
  • a separator having excellent salt removal rate, high permeability and low operating energy is required.
  • the permeability and selectivity have a trade off relationship with each other, and the conventional polymer-based separator has a weak mechanical strength.
  • the graphene or graphene oxide may be prepared and used as a separator to be dispersed in a matrix such as a polymer to improve separation efficiency.
  • a matrix such as a polymer
  • One object of the present invention is to provide a nano-membrane structure having improved permeability and excellent selectivity.
  • Another object of the present invention is to provide a method for producing a nanomembrane structure having improved permeability and excellent selectivity.
  • a layered structure and the fluid are provided such that a channel is formed in a first direction between a plurality of single layers stacked so that some of the fluid may selectively flow in and out through the channel. It includes a support for supporting the portion except the inlet and outlet of the channel to flow.
  • the layered structure may include at least one selected from carbon layered structures including graphene, graphene oxide, reduced graphene oxide, and graphite.
  • the layered structure may be composed of atoms other than carbon such as MoS 2 , WS 2 , h-BN, and may be used as a mixture thereof.
  • each single layer constituting the layered structure may have a two-dimensional planar structure.
  • the layered structure may include at least one selected from the group consisting of hydroxyl groups, amine groups and hydroxyl groups attached to a portion thereof.
  • functional groups may be used depending on the purpose without being limited to the types of functional groups.
  • the channel formed between the single layer may have a size in the range of 0.1 nm to 2.0 nm.
  • both ends of the layered structure may correspond to the inlet and outlet of the channel so that the fluid can flow in and out.
  • the nano-membrane structure may be positioned so that the fluid can be introduced into the channel at an angle of 45 degrees or less with respect to the first direction.
  • Nano-membrane structure may further include a spacer formed between the single layer to control the size of the channel.
  • the spacers may include physically fixed nanoparticles (C60, metal nanoparticles, etc.) or compounds using intercalation, which is a chemical method.
  • an additional spacer is added between the monolayers in a chemical or physical manner to adjust the spacing between the monolayers within the range of 1 nm to 10 nm.
  • the fluid when the fluid flows into and out of the channel, the fluid may selectively flow through the channel of the layered structure.
  • the layered structure is made of graphene oxide, the interlayer spacing between the single layer constituting the layered structure may be 1.2 nm or less.
  • the support may be provided with an inlet and an outlet at the top and bottom, respectively, and the inlet and the outlet may be provided so as not to overlap with each other planarly.
  • the layered structure has a ring shape, the inlet and the outlet may be provided on the inner and outer periphery of the layered structure, respectively.
  • a first support is prepared.
  • a layered structure is formed between the plurality of monolayers in a first direction so that some of the fluid can selectively flow in and out through the channel.
  • the layered structure may be formed using at least one selected from carbon layered structures including graphene, graphene oxide, reduced graphene oxide and graphite.
  • At least one selected from the group consisting of a hydroxyl group, an amine group, and a hydroxyl group may be attached to the layered structure.
  • a process of forming a spacer formed between the single layers may be additionally performed to adjust the size of the channel.
  • nano-sized particles may be additionally formed between the single layers through a spray coating process.
  • a heat treatment process may be additionally performed on the layered structure to adjust the size of the channel.
  • a pressing process of applying pressure in a second direction perpendicular to the first direction with respect to the layered structure may be additionally performed to adjust the size of the channel.
  • each of the plurality of graphene monolayers is transferred onto the first support to form the layered structure.
  • a second support is formed to cover the monolayers as a whole. Thereafter, a process of exposing both ends of the monolayers in the first direction may be performed.
  • the graphene oxide single on the support Form the layers.
  • a process of forming a second support to cover the monolayer as a whole and exposing both ends of the monolayers in the first direction may be performed.
  • the layered structure in order to form the layered structure, is formed on a substrate, and the first support is formed on the layered structure. After separating the substrate from the layered structure, a second support is formed to cover an exposed portion of the layered structure. Thereafter, a process of exposing both ends of the monolayers in the first direction may be performed.
  • a spiral structure may be formed by performing a rolling process on the first support and the layered structure.
  • Nano-membrane structure in accordance with embodiments of the present invention is provided so that the fluid can flow through the channel formed between the single layer included in the layered structure and the size of the channel is easily adjusted to the fluid such as gas or liquid There is an effect that the selectivity can be adjusted while improving the permeability. As a result, the nano-membrane structure may have excellent permeability while selectively filtering the material contained in the gas or liquid fluid.
  • FIG. 1 and 2 are cross-sectional views for explaining a nano-membrane structure in accordance with embodiments of the present invention.
  • FIG. 3 is a cross-sectional view for explaining a nano-membrane structure in accordance with embodiments of the present invention.
  • FIG. 4 is a cross-sectional view for explaining a nano-membrane structure in accordance with embodiments of the present invention.
  • FIG. 5 is a view for explaining a nano-membrane structure in accordance with embodiments of the present invention.
  • FIG. 6 is a view for explaining a nano-membrane structure in accordance with embodiments of the present invention.
  • FIG. 7 is a flowchart illustrating a method of manufacturing a nano-membrane structure in accordance with embodiments of the present invention.
  • FIG. 8 is a view for explaining a method of manufacturing a nano-membrane structure in accordance with embodiments of the present invention.
  • FIG. 9 is a view for explaining a method of manufacturing a nano-membrane structure in accordance with embodiments of the present invention.
  • first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.
  • the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.
  • the interlayer distances are defined as the gaps between them that correspond to channels and do not include the thickness of a single layer.
  • the thickness of some single layer may be included in the interlayer spacing.
  • a layered structure and the fluid are provided such that a channel is formed in a first direction between a plurality of single layers stacked so that some of the fluid may selectively flow in and out through the channel. It includes a support for supporting a portion excluding the inlet and outlet of the channel to flow.
  • the layered structure may include at least one selected from carbon layered structures including graphene, graphene oxide, reduced graphene oxide, and graphite.
  • the layered structure may be composed of atoms other than carbon such as MoS 2 , WS 2 , h-BN, and may be used as a mixture thereof.
  • 1 is a cross-sectional view for explaining a nano-membrane structure in accordance with embodiments of the present invention.
  • 2 is a side view for explaining a nano-membrane structure in accordance with embodiments of the present invention.
  • the nano-membrane structure 100 includes a support 110 and a layered structure 120 formed on the support 110.
  • the support 110 supports the layered structure 120.
  • the support 110 may support the layered structure 120.
  • the support 110 may have a structure surrounding the remaining portion except for the inlet and outlet formed in the layered structure (120).
  • the support 110 may include a first support 111 and a second support 113.
  • the first support 111 and the second support 113 may be integrally formed.
  • each of the first support 111 and the second support 113 may be formed and combined.
  • the second support 113 is provided to cover the layered structure 120 as a whole except for both ends of the layered structure 120 in the first direction. That is, the second support 113 may be provided to cover both sides of the upper portion of the layered structure 120 and the second direction (Y direction) perpendicular to the horizontal direction with respect to the first direction (X direction). have.
  • the layered structure 120 may have a more stable strength by covering the layered structure 120 with the second support 113 in a state in which the inlet and the outlet of the channel 125 are open. Furthermore, the first and second supports 111 and 113 may restrict the flow of the fluid so that the fluid may selectively flow only through the channel 125 along the first direction (X direction). Selective permeability to the fluid can be increased.
  • the support 110 may be made of a polymer, a metal, a ceramic, or the like. That is, the support 110 may use a material having a relatively low permeability for a fluid such as gas or liquid.
  • the support 110 when the support 110 is made of a polymer, it has a high transmittance for a gas or a liquid as compared to the case of a metal or a ceramic.
  • the support 110 made of the polymer is economical and further has a relatively low transmittance when compared to the layered structure 120, the application is possible. That is, the support 110 has a lower transmittance to the fluid than the layered structure 120.
  • the support 110 made of the polymer has an advantage that it is easy to manufacture.
  • the polymers include polydimethylsiloxane (PDMS), polycarbonate (PC), polytetrafluoroethylene (PTE), polyimide (PI), polyurethane, and the like.
  • the layered structure 120 is formed on the support 110.
  • the layered structure 120 has a stack structure in which a plurality of single layers 121, 122, and 123 are stacked on the support 110.
  • Each of the single layers 121, 122, and 123 has a two-dimensional planar structure.
  • an interlayer gap d between the single layers 121, 122, and 123 is formed.
  • the interlayer spacing d may be maintained by van der Waals forces between molecules.
  • Each of the single layer forming the layered structure 120, 121, 122 and 123 may have a structure connected in a row from the inlet to the outlet the fluid flows. As a result, the channel 125 continuously formed in the first direction may be formed.
  • the material forming the single layers 121, 122, and 123 may include graphene, graphite, graphene oxide, reduced graphene oxide, and the like.
  • the gas flowing into the nano-membrane structure includes hydrogen, carbon dioxide, nitrogen, methane, etc.
  • the gas may selectively permeate according to the size of molecules included in the gas by appropriately adjusting the interlayer distance d. Can be.
  • the interlayer spacing d between the single layers made of graphene, the monoatomic layer constituting graphite corresponds to about 0.34 nm.
  • the thickness of a single layer consisting of graphene may be included.
  • the interlayer spacing d may be adjusted to a range of 0.1 nm to 2.0 nm. Selectivity can be improved by reducing the interlayer spacing d relatively.
  • the interlayer distance d of the single layers 121, 122, and 123 made of graphene oxide is 1.2 nm or less, excellent permeability and selectivity for transporting water molecules, and a size of 0.45 nm or more Branches have selective cutoff properties for ions.
  • the interlayer distance d is adjusted to 1.2 nm or less. (At this time, the interlayer distance (d) may include the thickness of one single layer of graphene oxide.)
  • the single layers 121, 122, and 123 made of graphene oxide show excellent permeability compared to other ions in permeating water. Therefore, the interlayer spacing d of the layered structure 120 of graphene oxide is adjusted, and the direction through which water is transmitted is formed between the single layers 121, 122, and 123 included in the layered structure 120. ), Most of the water flows through the channel 125 formed between the single layers 121, 122, and 123, and can be permeated with high selectivity, thereby removing ions dissociated in the water. .
  • molecules such as CO 2 dissolved in water flow through the channel 125 formed between the single layers 121, 122, and 123 made of graphene oxide together with water, and thus may be permeable with high selectivity.
  • the layered structure 120 may have different affinity with respect to the gas. There may also be differences in permeability to gases. Therefore, by controlling the physical properties of the material constituting the single layer (121, 122, 123) included in the layered structure 120, it is possible to selectively permeate a specific gas or a specific liquid desired.
  • graphene has a very hydrophobic property, so that most water molecules may be difficult to enter into the channel 125 between the single layers 121, 122, and 123 made of the graphene.
  • water molecules when water molecules are introduced into the channel, water may flow at a very high speed due to the smoothness and hydrophobicity of the graphene surface and the nano-sized gap.
  • the other ions have a smaller size than the water molecules but have a larger size than the water molecules in the hydrate radius, and thus are electrically charged. Accordingly, other ions Yes difficult to flow in the channel 125 formed between the single layer made of a pin (121, 122, 123) may be only water molecules are selectively transmits.
  • the material forming the single layers 121, 122, 123 may be used a variety of materials that can be produced with the interlayer spacing (d) between the single layer is less than 2 nm.
  • the single layers 121, 122, and 123 forming the two-dimensional planar structure may include hexagonal boron nitride (h-BN), molybdenum disulfide (MoS 2 ), and tungsten disulfide (WS 2 ). have.
  • other materials may be applied as the two-dimensional layered structure whose thickness of the layered structure does not exceed 10 nm.
  • the layered structure 120 may be formed by stacking single layers on the support 110.
  • the layered structure 120 may be attached to the support 110 is made of a multilayer graphene. On the other hand, it may be prepared by peeling some layers from graphite.
  • a channel 125 is formed in a first direction between the single layers 121, 122, and 123 constituting the layered structure 120. Therefore, some of the fluid is provided to flow in the first direction through the channel 125 to selectively flow in and out. As such, the layered structure 120 may have improved fluid flowability by having a relatively low fluid resistance.
  • the channel 125 formed between the monolayers 121, 122, and 123 constituting the layered structure 120 has a spacing in the range of 0.1 nm to 2.0 nm (equivalent to the interlayer distance between the single layers, d). Can have. As a result, a material larger than the gap d may not pass through the channel 125, and a material smaller than the gap may selectively pass through the channel 125.
  • the layered structure 120 may include functional groups such as carboxyl groups, hydroxyl groups, amine groups or hydroxide groups. . That is, the ions may be filtered by attaching a functional group to the surface or the end of each of the single layers 121, 122, and 123. As a result, the layered structure 120 may have ion selectivity such as hydrophilicity or hydrophobicity, thereby increasing selectivity with respect to the fluid.
  • the functional group when a functional group is attached to the layered structure 120 adjacent to the inlet, the functional group can function as a kind of gate keeper due to the selective affinity for a particular gas or liquid and fluid.
  • the fluid is positioned to be introduced into the channel 125 at an angle of 45 degrees or less with respect to the first direction. Therefore, the nano-membrane structure 100 may have a low fluid resistance by reducing the contact area of the fluid with respect to the support 110.
  • both ends of the layered structure 120 in the first direction may correspond to the inlet and the outlet of the channel 125 to allow the fluid to flow in and out.
  • some of the fluid flows in the first direction through the inlets and outlets formed in the channel 125 to selectively flow in and out.
  • the layered structure 120 may have improved fluid flowability by having a relatively low fluid resistance.
  • FIG. 3 is a cross-sectional view for explaining a nano-membrane structure in accordance with embodiments of the present invention.
  • the nano-membrane structure includes a support 110 and a layered structure 120 including a plurality of single layers 121, 122, and 123 formed on the support 110. And a spacer 130.
  • the spacer 130 is interposed between the single layers 121, 122, and 123.
  • the spacer 130 may adjust the size of the channel 125, that is, the interlayer spacing d. That is, the size of the channel 125 may be changed according to the size of the spacer 130.
  • the size of the channel 125 may be adjusted in consideration of the size of molecules included in the fluid.
  • the spacer 130 is a physical solid material to be inserted by intercalation of the C60 (buckyball), gold, silver nanoparticles and molecular structure by a chemical treatment method.
  • An example of the spacer 130 may include potassium.
  • the spacer 130 formed by the intercalation expands the van der Waals gap between the monolayers 121, 122, and 123 so that the interlayer distance d between the monolayers 121, 122, and 123 is increased. Can increase.
  • the material contained in the fluid may be selectively transmitted according to its molecular size.
  • the spacer 130 may impart specific affinity to the flow of the incoming fluid, thereby improving the flow of the flow.
  • Figure 4 is a cross-sectional view for explaining a nano-membrane structure in accordance with an embodiment of the present invention.
  • the material forming the single layer may have a flake shape.
  • the material having the flake shape may be laminated in the first direction and the vertical direction.
  • each of the single layers 121, 122, and 123 constituting the layered structure 120 may be intermittently connected from the inlet through which the fluid flows to the outlet.
  • the flake-like material may be intermittently connected in a single plane when stacked on the surface of the first support.
  • the interlayer distance d between the single layers 121, 122, and 123 made of graphene is about 0.34 nm to about 2.0. It can be adjusted within the range of nm.
  • FIG. 5 is a view for explaining a nano-membrane structure in accordance with embodiments of the present invention.
  • the support is provided with the inlet and outlet, respectively at the top and bottom.
  • the inlet and the outlet may be provided so as not to overlap with each other in a plane.
  • the support may be provided with an inflow portion thereon, so that the fluid may flow into the upper portion of the layered structure.
  • the support since the support has an outlet portion at the bottom thereof, the fluid can flow out from the bottom of the layered structure.
  • the inlet and the outlet are non-overlapping in plane, thereby inducing fluid to move in the first direction through the channels in the layered structure.
  • FIG. 6 is a view for explaining a nano-membrane structure in accordance with embodiments of the present invention.
  • the layered structure may have a ring shape. That is, the layered structure may have a band shape in the form of a donut.
  • the inlet and the outlet, through which fluid may flow into or out of the inside may be provided at the inner and outer circumferences of the layered structure, respectively.
  • the direction of the fluid can be reversed.
  • the layered structure having a ring shape can be easily coupled to another member having a tube shape.
  • the separation efficiency of the fluid using the layered structure can be easily adjusted.
  • FIG. 7 is a flowchart illustrating a method of manufacturing a nano-membrane structure in accordance with embodiments of the present invention.
  • 8 is a view for explaining a method of manufacturing a nano-membrane structure in accordance with embodiments of the present invention.
  • a first support 111 is prepared (S110).
  • the first support 111 may be made of a polymer, a metal, a ceramic, or a mixture thereof. That is, the first support 111 may use a material having a relatively low permeability with respect to a fluid such as gas or liquid.
  • the first support 111 when the first support 111 is made of a polymer, it has a somewhat higher transmittance with respect to a gas or a liquid as compared with the case of a metal or a ceramic. However, since the first support 111 made of the polymer has a very low transmittance when compared to the layered structure 120, the application is possible. That is, the first support 111 has a lower transmittance to the fluid than the layered structure 120.
  • the polymers include polydimethylsiloxane (PDMS), polycarbonate (PC), polytetrafluoroethylene (PTE), polyimide (PI), polyurethane, and the like.
  • the layered structure 120 is formed on the first support 111 (S120).
  • the layered structure 120 has a stack structure in which a plurality of single layers are stacked on the first support 111.
  • the single layer has a two-dimensional planar structure.
  • the layered structure 120 In order to form the layered structure 120, a plurality of single layers may be sequentially stacked on the first support 111. Alternatively, the layered structure 120 may be attached to the first support 111 is made of a multi-layer graphene. On the other hand, it may be prepared by peeling some layers from graphite.
  • the single layer made of graphene may be prepared by various methods such as a liquid phase method, a chemical vapor deposition method, a polymer method, and the like.
  • the material of the single layer may include graphene, graphite, graphene oxide, reduced graphene oxide (reduced graphene oxide) and the like.
  • the single layer constituting the two-dimensional planar structure may include hexagonal boron nitride (h-BN), molybdenum disulfide (MoS 2 ), tungsten disulfide (WS 2 ), and the like.
  • the layered structure 120 may have improved fluid flowability by having a relatively low fluid resistance.
  • the channels formed between the single layers constituting the layered structure 120 may have a spacing (interlayer distance between single layers, d) in a range of 0.1 nm to 2.0 nm. As a result, material larger than the gap d cannot pass through the channel, and material smaller than the gap can selectively pass through the channel.
  • the surface of each of the single layer constituting the layered structure 120 carboxyl groups (hydroxyl groups), hydroxyl groups (hydroxyl groups), amine groups (amine groups), epoxy (expoxy) groups Or a functional group such as hydroxide groups.
  • the layered structure may have hydrophilicity or hydrophobicity, thereby increasing selectivity to the fluid.
  • a spacer formed between the single layer may be additionally formed to adjust the size of the channel.
  • chemical processes such as intercalation of molecules between the monolayers can be additionally performed.
  • a heat treatment process may be additionally performed on the layered structure 120 to adjust the size of the channel. As a result, the size of the channel may be reduced through the heat treatment process.
  • the interlayer spacing between the initial single layers may be relatively wide.
  • the interlayer spacing between the single layers may decrease according to the process temperature.
  • reduced graphene oxide can be formed through relatively high temperatures or through certain treatment processes such as hydrazine.
  • the interlayer spacing may be further reduced to an interval corresponding to the interlayer spacing between single layers made of graphite.
  • in order to adjust the size of the channel may be additionally performed a pressing process for applying pressure to the layer structure 120 in a second direction perpendicular to the first direction. As a result, the size of the channel can be reduced.
  • the second support 113 may be formed to cover the single layers as a whole except for both ends of the first direction (S130). A method of forming the second support 113 will be described in detail below.
  • each of the plurality of graphene monolayers are transferred onto the first support.
  • a carbon source such as methane is fed onto a copper foil to form a graphene monolayer on the copper foil.
  • the graphene monolayer is transferred onto the first support.
  • the coating film 103 is formed to cover the single layers as a whole.
  • the coating film 103 may be formed by supplying a liquid polymer resin on the layered structure 120 and then curing the liquid polymer resin.
  • a second support 113 is then formed by exposing both ends of the monolayers in the first direction. This forms a channel comprising an inlet and an outlet through which the fluid can flow. Fluid may flow in the first direction through the channel.
  • a solution containing graphene oxide powder is coated on the first support 111.
  • the solution is then dried to form graphene oxide monolayers on the support. At this time, the solvent contained in the solution is removed.
  • the coating film 103 is formed to cover the single layer as a whole.
  • the coating film 103 may be formed by supplying a liquid polymer resin on the layered structure and then curing the liquid polymer resin.
  • a second support 113 is formed which exposes both ends of the monolayers in the first direction. This forms a channel comprising the inlet and outlet of the fluid. Fluid may flow in the first direction through the channel.
  • the layered structure is formed on a substrate. Thereafter, the first support is formed on the layered structure.
  • the first support may be formed by supplying a liquid polymer resin on the layered structure and then curing the liquid polymer resin.
  • the substrate is separated from the layered structure.
  • the layered structure is formed on the first support. At this time, a part of the layered structure in contact with the substrate is exposed.
  • a coating film is formed to cover the exposed portion of the layered structure.
  • the coating film may be formed by supplying a liquid polymer resin on the layered structure and then curing the liquid polymer resin.
  • both ends of the monolayers in the first direction are exposed to form a second support.
  • the support or the layered structure 120 may be recessed by itself to block the inlet or outlet forming the channel. Therefore, the channel recessed portion may be etched through an acid treatment process or a plasma treatment process to secure an interval between channels through which the fluid can flow.
  • FIG. 9 is a view for explaining a method of manufacturing a nano-membrane structure in accordance with embodiments of the present invention.
  • the layered structure 120 may have a spiral structure.
  • a filler filling the space may be formed.
  • An example of the filler may be a polymer.
  • both ends of the layered structure 120 in the first direction are exposed.
  • a channel having an inlet and an outlet through which fluid flows in the first direction may be formed in the layered structure 120.
  • the technology related to the above-described nanomembrane structure and its manufacturing method may be applied to a liquid filtering device such as a water purification filter, a selective ion permeable filter, and a seawater desalination filter.
  • a gas filtering device for filtering a gas such as carbon dioxide, oxygen, hydrogen, and the like.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
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  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

La présente invention concerne une structure de membrane de séparation nanoscopique comprenant une structure stratifiée, qui présente des canaux formés dans une première direction entre une pluralité de monocouches feuilletées de sorte qu'une partie d'un fluide peut entrer/sortir sélectivement via lesdits canaux ; et un corps de support qui supporte les autres parties des canaux que lesdites parties d'entrée/sortie de sorte que l'écoulement peut s'écouler. Par conséquent, il est possible de rendre sûres d'excellentes propriétés de perméabilité et de sélectivité par rapport au fluide.
PCT/KR2015/012901 2014-12-01 2015-11-30 Structure de membrane de séparation nanoscopique et son procédé de fabrication WO2016089055A1 (fr)

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WO2021071425A1 (fr) * 2019-10-07 2021-04-15 National University Of Singapore Membrane en matériau 2d à sélectivité ionique

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KR102416152B1 (ko) * 2021-03-12 2022-07-06 고려대학교 산학협력단 나노 층상 구조막이 결합된 나노포어 소자

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* Cited by examiner, † Cited by third party
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CN112512671A (zh) * 2018-07-11 2021-03-16 上海特瑞思材料科技有限公司 用于水处理的装置和方法
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WO2021071425A1 (fr) * 2019-10-07 2021-04-15 National University Of Singapore Membrane en matériau 2d à sélectivité ionique

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