KR20170124290A - Mold for fabricating superhydrophobic structure and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a mold for manufacturing a superhydrophobic structure. The mold for manufacturing a superhydrophobic structure comprises: a base (10); a structure layer (20) in which a plurality of microspheres (21) are adjacent to each other and dispersed on one surface of the base (10); a protective layer (30) which is coated on the structure layer (20) and fixes the microspheres (21) and in which a plurality of convex protruding parts (31) corresponding to surface shapes of the microspheres (21) are arranged on one surface; and a mold layer (40) which is arranged along one surface of the protective layer (30), in which a concave part (41) and a convex part (42) corresponding to one surface shape of the protective layer (30) are repeatedly formed and which forms a superhydrophobic surface on a polymer (1) when molding with the polymer (1).

Description

TECHNICAL FIELD [0001] The present invention relates to a mold for manufacturing a super water repellent body and a method of manufacturing the same,

The present invention relates to a mold for manufacturing an ultra water-repellent body and a method of manufacturing the same.

The phenomenon that occurs when a liquid meets a solid surface is called wettability. One is that the liquid spreads on the surface, and the other one forms a water droplet. The nature of the liquid that enables electrons is called hydrophilicity, and the latter property is called hydrophobicity. These hydrophilicity and hydrophobicity are important for practical purposes. Conventional hydrophobic technology has been mainly used to impart functions such as water repellency, oil repellency, antifouling property, lubricity, non-stickiness and low surface tension in various traditional industries such as paints, adhesives, fibers, fine chemicals, automobiles, metals and glass. Currently, research on hydrophobic techniques has advanced to the stage of embodying super-hydrophobic properties on solid surfaces. Super hydrophobic properties are applied in various industrial fields such as superfine water repellent and superpulsive oil refining technology from the paper industry to the manufacturing technology of daily necessities, corrosion prevention of metal materials, prevention of freezing of the body during aircraft operation, and automobile exterior coating.

The super water repellent surface should have a fine surface roughness and low surface energy. In order to realize such a super water-repellent surface, various methods have been developed. As a usable method, there is a method of forming a nanostructure having a super-water-repellent surface by etching the surface of the substrate. However, in this method, since the surface of the substrate must be etched every time in order to realize super water repellency, it takes a long time and it is difficult to repeatedly produce the material, which makes mass production impossible.

In order to solve the problem of this etching method, a method of molding a super water repellent product through a mold has been devised as disclosed in the patent documents of the following prior art documents. Such a conventional super water-repellent product molding method produces a super-water-repellent product by manufacturing a mold, processing the inner surface thereof, and pouring a material material into the mold. Here, the laser ablation method is used for processing the mold. Specifically, a circular laser is repeatedly irradiated on the inner surface of the metal mold in a lattice pattern to form a fine uneven structure on the inner surface of the metal mold. The super-water-repellent product molding through the mold is advantageous in that the production process is very simple, and the manufacturing cost is greatly reduced and mass production is possible. However, conventional mold manufacturing and machining methods use a laser to form a concavo-convex structure, which has a problem in that the mold manufacturing process becomes complicated. In addition, it is extremely difficult to fabricate a nanostructure through a laser processing process in reality, and a large cost is required for the process, resulting in poor economical efficiency.

Accordingly, there is a desperate need for a solution to the problems of conventional mold manufacturing and machining methods.

KR 10-2009-0061380 A

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and one aspect of the present invention is to provide a mold having a plurality of microspheres fixed adjacent to each other, And to provide a super-water repellent manufacturing mold having a structural form.

According to another aspect of the present invention, there is provided a super-water repellent fabricating mold having a reverse structure in which recesses and protrusions are repeatedly formed by forming a mold layer on a base having a plurality of recesses recessed in a hemispheric shape from one surface thereof, .

The mold for manufacturing a super water repellent body according to an embodiment of the present invention comprises a base, a structure layer on the one surface of the base, in which a plurality of micro-spheres are dispersed adjacent to each other, And a plurality of convex hemispherical convex portions corresponding to the surface shape of the microspheres are formed on one surface of the protective layer and a plurality of concave portions corresponding to the one surface shape of the protective layer, (Recessed portion) and a convex portion are repeatedly formed, and a mold layer for forming a super water-repellent surface on the polymer when molding with the polymer.

In addition, in the mold for manufacturing the super water repellent body according to the embodiment of the present invention,

And a diameter of 100 nm to 10 탆.

Further, in the mold for producing an ultra water repellent body according to the embodiment of the present invention, the microspheres are formed of silica.

In addition, in the mold for manufacturing the super water repellent body according to the embodiment of the present invention, the protective layer is formed by coating a ceramic solution.

In addition, in the mold for producing a super water-repellent body according to the embodiment of the present invention, the mold layer may include a bonding layer in which one side is in contact with the protective layer, and a bonding layer on the other side, And a shaping layer which is separated from the super-water-repellent structure after the super-water-repellent structure is formed, wherein the bonding layer has a greater bonding force to be combined with the protective layer relative to the shaping layer, The binding force to bond with the polymer is small.

In addition, in the super-water repellent mold according to the embodiment of the present invention, the bonding layer includes at least one of titanium (Ti), nickel (Ni), and chromium (Cr).

Further, in the super-water-repellent body manufacturing mold according to the embodiment of the present invention, the shaping layer includes at least one of gold (Au), silver (Ag), platinum (Pt), and copper (Cu).

According to another aspect of the present invention, there is provided a super-water repellent fabricating mold comprising: a base having a plurality of concave portions recessed in a hemispherical shape from a surface thereof and spaced apart at a predetermined interval; And a mold layer in which a concave portion and a convex portion corresponding to the shape of one surface of the base are repeatedly formed and the super water-repellent surface is formed on the polymer when molding with the polymer.

Further, in the mold for manufacturing a super water repellent body according to another embodiment of the present invention, the convex portion of the mold layer is formed flat.

In addition, the mold for manufacturing an ultra water repellent body according to another embodiment of the present invention further includes a wear resistant layer which is bent along the outer surface of the mold layer and has a hardness relatively higher than that of the mold layer.

According to another aspect of the present invention, there is provided a method of manufacturing an ultra-water-repellent metal mold, comprising the steps of: (a) forming a structural layer by coating a plurality of micro- (b) coating a ceramic solution on the structural layer so that a plurality of semi-spherical convex protrusions corresponding to the surface shape of the microspheres are arranged on one surface, thereby forming a protective layer; And (c) depositing a metal on one surface of the protective layer so that a concave portion and a convex portion corresponding to the one surface shape of the protective layer are repeatedly formed on the outer surface, thereby forming a mold layer .

In addition, in the method for manufacturing an ultra-water-repellent metal mold according to an embodiment of the present invention, the step (b) includes a step of coating the ceramic solution and then heat-treating the ceramic solution.

In addition, in the method for manufacturing a super water-repellent fabricating mold according to an embodiment of the present invention, the step (c) may include depositing a first metal on the protective layer to form a bonding layer, And forming a shaping layer by depositing on the bonding layer, wherein the first metal has a greater bonding force to be bonded to the ceramic relative to the second metal, and the second metal is relatively more The bonding force to bond with the polymer is small.

Further, in the method for manufacturing an ultra-water-repellent mold according to the embodiment of the present invention, the microspheres have a diameter of 100 nm to 10 탆.

In addition, in the method for manufacturing a mold for manufacturing an ultra water-repellent body according to an embodiment of the present invention, the microspheres are formed of silica.

In the method of manufacturing a super water repellent mold according to an embodiment of the present invention, the first metal includes at least one of titanium (Ti), nickel (Ni), and chromium (Cr).

In the method of manufacturing an ultra-water-repellent metal mold according to an embodiment of the present invention, the second metal may be at least one of gold (Au), silver (Ag), platinum (Pt) .

In another aspect of the present invention, there is provided a method of manufacturing a super water repellent material manufacturing mold, comprising the steps of: (a) coating a plurality of micro-spheres on one surface of a support so as to be dispersed adjacent to each other, (b) forming a protective layer by coating a ceramic solution on the structure layer such that a plurality of hemispherical convex protrusions corresponding to the surface shape of the microspheres are arranged on one side of the microspheres, (c) Depositing a metal on one side of the protective layer to form a mold layer so that a concave portion and a convex portion corresponding to the one surface shape of the layer are repeatedly formed; (E) depositing the mold layer coupled to the base from the protective layer. The method of claim 1,

In addition, in the method for manufacturing an ultra water-repellent body manufacturing mold according to another embodiment of the present invention, the step (b) includes a step of coating the ceramic solution and then performing heat treatment.

Further, in the method of manufacturing a super water-repellent material manufacturing mold according to another embodiment of the present invention, the metal in step (c) includes nickel (Ni).

In addition, in the method of manufacturing an ultra-water-repellent mold according to another embodiment of the present invention, the step (e) separates water by injecting water between the mold layer and the protective layer.

Further, in the method of manufacturing an ultra-water-repellent mold according to another embodiment of the present invention, after the step (e), an anti-wear material having a hardness relatively larger than that of the mold layer is coated on one surface of the mold layer, And forming an abrasion resistant layer.

Further, in the method of manufacturing a super water repellent mold according to another embodiment of the present invention, the ceramic solution is a silica (SiO ₂ ) series solution.

In the method of manufacturing an ultra-water-repellent mold according to another embodiment of the present invention, in step (b), the surface of the ceramic solution between any adjacent one of the microspheres and the other microsphere is flat, The ceramic is coated.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to that, terms and words used in the present specification and claims should not be construed in a conventional and dictionary sense, and the inventor may properly define the concept of the term in order to best explain its invention It should be construed as meaning and concept consistent with the technical idea of the present invention.

According to the present invention, a mold layer is disposed on a plurality of microspheres fixed adjacent to each other, and a concavo-convex structure corresponding to the arrangement of the microspheres is formed on the outer surface of the mold layer, It can be mass-produced in a short period of time.

In addition, according to the present invention, since the mold layer is formed by sequentially arranging the bonding layer strongly bonded to the ceramic and the forming layer easily separated from the polymer, and the plurality of microspheres are fixed by the protective layer of the ceramic solution, Durability is improved and separation from the super water repellent structure is easy.

In addition, according to the present invention, a mold layer is formed on a base having a plurality of concavities recessed in a hemispheric shape from one surface so that recesses and protrusions are repeatedly formed, and the protrusions are flat, There is an effect of preventing abrasion and breakage of the convex portion in the convex portion.

1A and 1B are sectional views of a super water repellent material manufacturing mold according to a first embodiment of the present invention.
2A and 2B are cross-sectional views of a mold for manufacturing a super water repellent body according to a second embodiment of the present invention.
Figs. 3 to 4 are flowcharts of a method for manufacturing a super-water-repellent mold according to an embodiment of the present invention.
5A and 5B are cross-sectional views of a mold for manufacturing an ultra water repellent body according to a third embodiment of the present invention.
6A to 6B are cross-sectional views of a mold for manufacturing a super water repellent body according to a fourth embodiment of the present invention.
7 to 8 are flowcharts of a method for manufacturing a super water repellent mold according to another embodiment of the present invention.
9 is a scanning electron microscope (SEM) photograph of a mold for manufacturing an ultra water repellent body according to an embodiment of the present invention.
10 is a scanning electron microscope (SEM) and contact angle measurement photograph of the super water repellent body produced according to the embodiment of the present invention.
11 is a scanning electron microscope (SEM) photograph of a mold for preparing an ultra water-repellent body according to an embodiment of the present invention before and after the repeated molding.
12 is a graph showing changes in the contact angle with respect to the number of times of molding of the super water-repellent body manufactured according to the mold for manufacturing the super water repellent body according to the embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objectives, specific advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. Also, the terms "first "," second ", and the like are used to distinguish one element from another element, and the element is not limited thereto. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the present invention, detailed description of related arts which may unnecessarily obscure the gist of the present invention will be omitted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1A and 1B are sectional views of a super water repellent material manufacturing mold according to a first embodiment of the present invention.

1A, a mold for manufacturing a super water repellent body according to a first embodiment of the present invention includes a base 10 and a plurality of micro-spheres 21 adjacent to each other on one surface of a base 10 A plurality of hemispherically convex protrusions 31 corresponding to the surface shape of the microspheres 21 are coated on the structure layer 20 and the structure layer 20 to be dispersed, A concave portion 41 and a convex portion 42 corresponding to one surface of the protective layer 30 are formed on the outer surface of the protective layer 30 and the protective layer 30, And a mold layer 40 which forms a super water-repellent surface on the polymer 1 when the polymer 1 is molded.

The super-water-repellent material manufacturing mold according to this embodiment relates to a mold capable of mass-producing an ultra water-repellent material, and includes a base 10, a structural layer 20, a protective layer 30, and a mold layer 40 .

The super water repellent body is a micro structure having a super water repellent surface, and has a superhydrophobic property in which a water droplet is formed without being wetted and spread when a liquid touches the surface. At this time, in order to realize a super water-repellent surface, it is necessary to have a fine-sized surface roughness and a low surface energy. The super-water-repellent material manufacturing mold according to this embodiment is for producing a polymer structure having a super water-repellent structure. When the polymer 1 is molded and cured, a super water-repellent surface is formed on the polymer 1, Can be mass produced. Here, the polymer (1) material is selected from the group consisting of polydimethylsiloxane (PDMS), polypropylene (PP), polyurethane (PU), polyethylene (PE), polyfluorinated vinylidene (PVDF), polyether sulfone Fluoroethylene (PTFE), and the like.

The super-water-repellent fabricating mold according to the present embodiment for forming a super water-repellent structure in such a polymer 1 is characterized in that the structure layer 20, the protective layer 30 and the mold layer 40 are sequentially formed on the base 10 .

Here, the base 10 is a member for supporting the structure layer 20, the protective layer 30, and the mold layer 40. There is no limitation on the material of the base 10, but in the case of using a ceramic, it may be broken in a repeated molding process. In the case of the polymer 1, there is a fear of deformation. Therefore, it is preferable to use a metal material. However, it is not necessarily limited to metal materials. The shape of the base 10 may be a flat plate shape for stably supporting the structure layer 20 and the like but is not limited to such flat plate shape. May be formed.

The structure layer 20 is a layer formed on one side of the base 10, and implements the surface structure of the mold layer 40. The structure layer 20 is formed by disposing a plurality of micro-spheres 21 on one surface of the base 10, wherein the micro-spheres 21 are adjacent to each other and their boundaries are in contact with each other. Here, the microspheres 21 are nano- or micro-sized structures formed in a spherical shape, and their diameters can reach 100 nm to 10 탆. However, the diameter of the microspheres 21 is not limited thereto. The microspheres 21 may be formed of a ceramic material. Typically, silica (SiO ₂ ) contained in ceramic materials can be used. However, the material of the microspheres 21 is not necessarily limited to silica or ceramics, and may be any known material. These microspheres 21 are coated on one surface of the base 10 and are fixed while being surrounded by the protective layer 30. [

Here, the protective layer 30 is a layer that is coated on the structure layer 20 and covers the microspheres 21. The material forming the protective layer 30 is coated on the structure layer 20 to surround the microspheres 21 and fix the microspheres 21 as they are cured. That is, the material constituting the protective layer 30 surrounds the surface of the microspheres 21, and the adjacent microspheres 21 are bonded to each other, penetrating into the gaps between the adjacent microspheres 21, , The microspheres 21 are fixed to one surface of the base 10. As a result, the protective layer 30 fixes the microspheres 21 to prevent the microspheres 21 from escaping from the structure layer 20. [ This protective layer 30 may be formed, for example, by a ceramic solution. Specifically, after the ceramic solution is coated on the structure layer 20, it can be heat-treated to form the protective layer 30 in the form of covering and surrounding the microspheres 21. However, the material of the protective layer 30 is not limited to ceramics but may be any known material as long as it can be coated on the structure layer 20 to protect the structure layer 20.

On the other hand, a plurality of protrusions 31 are formed on one surface of the protective layer 30. Here, one surface of the protective layer 30 refers to the surface opposite to the surface of the base 10 to be bonded to one surface. The material of the protective layer 30 is coated along the surface of the microspheres 21 when the material forming the protective layer 30 is coated on the structure layer 20 so that the plurality of protrusions 31 are formed on the surface shape of the microspheres 21 As shown in Fig. The mold layer 40 is disposed on one side of the protective layer 30 formed in this shape.

The mold layer 40 is a layer which forms a super water-repellent structure in the polymer 1. The concave portion 41 and the convex portion 42 are repeatedly formed on the outer surface in correspondence with the one surface shape of the protective layer 30 because the mold layer 40 is disposed along one surface of the protective layer 30. [ The convex portion 42 on the outer surface of the mold layer 40 protrudes outward in a hemispherical shape corresponding to the protruding portion 31 of the protective layer 30, And is recessed inward corresponding to the concave portion between the protrusion 31 and the other protrusion 31. [ Therefore, as in the case of embossing the mold layer 40, a recessed portion is formed on the inner surface as opposed to the protruded portion 42 on the outer surface, and a convex portion is formed on the inner surface as opposed to the recessed portion 41 on the outer surface. Here, the outer surface of the mold layer 40 is a surface exposed to the outside, and the inner surface of the mold layer 40 means a surface bonded to one surface of the protective layer 30. [ The recessed portion 41 and the convex portion 42 are provided on the outer surface of the mold layer 40 so that the super water repellent structure can be realized when the polymer 1 is coated on the outer surface of the mold layer 40. [

On the other hand, the mold layer 40 must continuously exhibit a super water-repellent structure in the polymer 1, and therefore, the mold layer 40 should have excellent durability. Thus, the mold layer 40 may be made of a metallic material, which may include, for example, nickel (Ni), copper (Cu), platinum (Pt), and the like. However, the mold layer 40 is not necessarily formed of a metal material, and the metal material is not limited to nickel, copper, and platinum, but may be formed of any known material as long as it can form a super water- It is possible.

As a result, the mold layer 40 is disposed on the plurality of microspheres 21 adjacently fixed to each other in the super-water-repellent material producing mold according to the present embodiment, and the concave and convex portions corresponding to the arrangement of the microspheres 21 ) Structure is formed on the outer surface of the mold layer 40, it is possible to mass-produce the super water repellent structure in a short period of time by using a molding technique.

Meanwhile, the mold layer 40 according to the present invention may be formed as a double layer, which will be described in detail below.

1B, the mold layer 40 of the super-water-repellent mold according to the embodiment of the present invention may include a bonding layer 45 and a shaping layer 47. Here, the mold layer 40 is a structure in which the shaping layer 47 is disposed on the bonding layer 45. The bonding layer 45 is a layer in which one surface thereof is closely bonded to the protective layer 30 and the forming layer 47 is a layer in which one surface thereof is bonded to the other surface of the bonding layer 45. At this time, the polymer 1 is coated on the other surface of the shaping layer 47 to form a super water-repellent structure. When the super-water-repellent structure is formed, the shaping layer 47 is separated from the polymer 1.

The bonding layer 45 and the shaping layer 47 have different bonding forces. The bonding layer 45 has a strong bonding force to be combined with the protective layer 30 relative to the shaping layer 47, (47) has a smaller bonding force for bonding with the polymer (1) relative to the bonding layer (45). In the case of the bonding layer 45, since it is fixedly coupled between the protective layer 30 and the shaping layer 47, it must be strongly bonded to the material constituting the protective layer 30 and the shaping layer 47. On the other hand, since the shaping layer 47 should be easily separated from the polymer 1 having the super water-repellent structure, the binding strength with the polymer 1 should be weak.

For example, when the protective layer 30 is made of a ceramic material and the shaping layer 47 is made of a metal material, the bonding layer 45 must have high bonding force with ceramics and metals. Therefore, for example, ), Nickel (Ni), or chromium (Cr), or a material containing at least one of these metals. At this time, the shaping layer 47 is made of a metal having weak bonding force with the polymer 1, for example, gold (Au), silver (Ag), platinum (Pt) or copper (Cu) . However, the material of the bonding layer 45 and the shaping layer 47 is not necessarily limited thereto.

As a result, in the super-water-repellent mold according to the present embodiment, the bonding layer 45 strongly bonded to the protective layer 30 and the forming layer 47, which is easily separated from the polymer 1, Since the plurality of microspheres 21 are fixed by the protective layer 30 made of ceramic solution, durability is improved and separation from the super water repellent structure is easy.

2A and 2B are cross-sectional views of a mold for manufacturing a super water repellent body according to a second embodiment of the present invention.

2A and 2B, the surface of the protective layer 3 between the protrusions 31 and the protrusions 31 adjacent to each other is flattened . The material constituting the protective layer 30 is coated between the protruding portions 31 and the protruding portions 31 adjacent to each other so that the space between the protruding portions 31 and the protruding portions 31 is filled with the material so that the depressed bottom surface is formed flat .

When the mold layer 40 is disposed on one side of the protective layer 30 formed in this shape, the concave portion 41 of the mold layer 40 is also covered with the protective layer 3 between the protruding portion 31 and the protruding portion 31, And is formed flat in correspondence with the surface. Here, the mold layer 40 may be formed of a double layer of the bonding layer 45 and the molding layer 47, as in the first embodiment described above.

Hereinafter, a method of manufacturing an ultra-water-repellent metal mold according to the present invention will be described.

Figs. 3 to 4 are flowcharts of a method for manufacturing a super-water-repellent mold according to an embodiment of the present invention.

3 to 4, a method of manufacturing an ultra water-repellent material manufacturing mold according to an embodiment of the present invention includes the steps of (a) forming a plurality of micro- (B) forming a plurality of hemispherically convex protrusions 31 corresponding to the surface shape of the microspheres 21 on one side of the structure layer 20; A step S20 of forming a protective layer 30 by coating a ceramic solution on the structure layer 20 and a step (c) of forming a concave portion 41 (corresponding to one surface of the protective layer 30) Forming a mold layer 40 by depositing a metal along one side of the protective layer 30 so as to repeatedly form convex portions 42 (see Figs. 1A to 2B) and convex portions 42 (see Figs. 1A to 2B) (S30).

The method for manufacturing a super water repellent body manufacturing mold according to the present embodiment is a method for manufacturing a super water repellent body manufacturing mold according to the first to second embodiments of the present invention, Forming a protective layer 30 (S20), and forming a mold layer 40 (S30).

The method for manufacturing a super water repellent body manufacturing mold according to the present embodiment is a method for manufacturing a super water repellent body manufacturing mold according to the first and second embodiments of the present invention. Therefore, the description of the overlapping portions of the super-water-repellent mold according to the present invention will be omitted or briefly explained.

A plurality of microspheres 21 are coated on one surface of the base 10 in the step S10 of forming the structure layer 20 in the method of manufacturing a super water repellent material manufacturing mold according to the present embodiment. At this time, the coating is performed such that a plurality of microspheres 21 are dispersed adjacent to each other. As a result, the coated microspheres 21 adhere to one side of the base 10 to form the structure layer 20. When the structure layer 20 is formed, a step S20 of forming a protective layer 30 is performed.

Step S20 of forming the protective layer 30 is a step of coating a ceramic solution on the structure layer 20. [ Here, by coating the ceramic solution along the surface of the microspheres 21, protrusions 31 (see Figs. 1A and 2A) are formed on one surface of the protective layer 30 on which the ceramic solution is hardened. That is, a plurality of hemispherical convex portions 31 corresponding to the surface shape of the microspheres 21 are arranged on one surface of the protective layer 30. Here, the method may further include a heat treatment step. The heat treatment step is performed after the ceramic solution is coated. Through the heat treatment, the workability of the protective layer 30 can be improved, and the structure can be dense and stable. At this time, in order to prevent the penetration of the ceramic solution due to the air layer between the micro-spheres 21, that is, for uniform coating, after the ceramic solution coating, a vacuum treatment may be further performed before the heat treatment step.

After the protective layer 30 is formed, a step S30 of forming the mold layer 40 is performed. In step S30 of forming the mold layer 40, a metal is deposited along one side of the protective layer 30. [ At this time, a metal is deposited (deposited) so that a concave portion 41 (see Figs. 1A to 2B) and a convex portion (see Figs. 1A to 2B) corresponding to one surface of the protective layer 30 are repeatedly formed do.

On the other hand, in the case where the mold layer 40 has a double structure, the step S30 of forming the mold layer 40 includes the steps of forming the bonding layer 45 (see Figs. 1B and 2B) , See FIGS. 1B and 2B). The forming of the bonding layer 45 is performed by depositing a first metal on the protective layer 30. In the step of forming the forming layer 47, the bonding layer 45 formed by vapor- A second metal is deposited. At this time, the first metal has a strong bonding force to bond with the ceramic relative to the second metal, and the second metal has a small binding force to bond with the polymer relative to the first metal.

For example, the first metal includes at least one of titanium (Ti), nickel (Ni), and chromium (Cr), and the second metal includes gold (Au), silver (Ag) , And copper (Cu).

In the above-described embodiment, the super-water-repellent material manufacturing mold according to the present invention was a regular structure mold having a structure in which the convex portion 220 of the mold layer 200 protruded hemispherically. However, the mold for manufacturing the super water repellent body according to the present invention may be a reverse structure mold in which recesses 210 of the mold layer 200 are recessed in a hemispherical shape. This will be described in detail below.

FIGS. 5A and 5B are cross-sectional views of a super-water-repellent body manufacturing mold according to a third embodiment of the present invention, and FIGS. 6A and 6B are sectional views of a super water-repellent body manufacturing mold according to a fourth embodiment of the present invention.

5A and 5B, the super-water-repellent mold according to the present embodiment includes a base 100 having a plurality of recesses 110 recessed in a hemispherical shape from one side and spaced apart at a predetermined interval, ; A concave portion 210 and a convex portion 220 corresponding to the shape of one surface of the base 100 are repeatedly formed on the outer surface of the base 100 and the polymer 1 is repeatedly formed on the outer surface. And a mold layer (200) for forming a super water-repellent surface on the polymer (1) upon molding.

The super-water-repellent manufacturing mold according to this embodiment includes a base 100 and a mold layer 200, and a mold layer 200 is disposed on the base 100.

Here, the base 100 according to the present embodiment includes a plurality of recesses 110 recessed in a hemispherical shape on one surface. At this time, the plurality of recesses 110 are spaced apart from each other with a predetermined gap therebetween. The contents of the base 100 are the same as those of the base 10 (see Fig. 1A) of the super-water-repellent metal mold according to the first embodiment of the present invention, and the description thereof will be omitted.

The mold layer 200 according to the present embodiment is disposed on the base 100 as a layer for forming a super water-repellent surface on the polymer 1. Since the mold layer 200 is disposed along one side of the base 100, the concave portions 210 and the convex portions 220 corresponding to the one surface shape of the base 100, Is repeatedly formed. The concave portion 210 of the mold layer 200 is formed along the concave portion 110 of the base 100 so that it is recessed in a hemispherical shape and the convex portion 220 of the mold layer 200 is embedded in the base 100, The concave portion 110 is formed to correspond to the surface portion 100a between any one concave portion 110 and the other concave portion 110. [

Here, the convex portion 220 of the mold layer 200 may be formed flat. At this time, it is possible to prevent breakage or damage of the convex portion 220 even if the molding process of repetitively coating the polymer 1 on the outer surface of the mold layer 200 and repeating the molding process is repeated. If the convex portion 220 is sharp, stress may be concentrated on the convex portion 220 and breakage may occur. Therefore, by flattening the convex portions 220, it is possible to improve the durability of the mold layer 200 by dispersing the stress applied to the convex portions 220. As a result, the mold layer 200 can always produce a constant super water repellent structure, despite the repetitive molding process.

The super-water repellent body manufacturing mold according to this embodiment may further include an abrasion-resistant layer 300 (see Fig. 5B). Here, the abrasion resistant layer 300 is disposed to be bent along the outer surface of the mold layer 200. At this time, the outer surface of the mold layer 200 means the surface of the mold layer 200 facing the polymer 1 (see FIG. 3). Therefore, the wear resistant layer 300 is disposed between the mold layer 200 and the polymer 1. At this time, since the abrasion-resistant layer 300 has a relatively harder material than the mold layer 200, it is possible to prevent the mold layer 200 from being worn out during the molding process. The abrasion resistant layer 300 can be formed, for example, by a DLC (Diamond Like Carbon) coating. However, the abrasion-resistant layer 300 is not limited to the DLC coating, but may be formed through a ceramic coating. At this time, the ceramic coating material to be used may be a _{SiO 2, TiO 2, TiN,} TiCN, TiAlN, AlTiN, CrN. However, the ceramic coating material is not necessarily limited thereto.

6A to 6B, the convex portion 220 of the mold layer 200 may be rounded. That is, the distal end of the convex portion 220 can form a dome-shaped curved surface. By such a formation, the durability can be improved by avoiding stress concentration applied to the convex portion 220.

Further, the abrasion-resistant layer 300 can be disposed even when the convex portion 220 of the mold layer 200 is rounded.

Hereinafter, a method of manufacturing a super-water repellent metal mold heavy structure mold according to the present invention will be described. The description of the overlapped contents among the above-mentioned reverse-structure dies will be omitted or simply explained.

7 to 8 are flowcharts of a method for manufacturing a super water repellent mold according to another embodiment of the present invention.

7 to 8, a method of manufacturing an ultra water-repellent mold according to another embodiment of the present invention includes the steps of (a) forming a plurality of microspheres (not shown) on one surface of a support 10 ' (B) forming a plurality of hemispherical convex portions 31 'corresponding to the surface shape of the microspheres 21' on one surface thereof; (b) forming the structure layer 20 ' A step (S200) of forming a protective layer 30 'by coating a ceramic solution on the structure layer 20' so that the protective layer 30 ' A metal is deposited along one side of the protective layer 30 'so that the concave portion 210 (see FIG. 3) and the convex portion 220 (see FIG. 3) (D) depositing a predetermined material on the other side of the mold layer 200 to form a base 100 (S400); and (e) forming a mold 100 coupled to the base 100, Layer 200 to the protective layer 30 ' And a step (S500) of separating from.

The method for manufacturing a super water repellent mold according to the present embodiment relates to a method of manufacturing an inverse structural metal mold, which comprises forming a structure layer 20 '(S100), forming a protective layer 30' (S200 (S300) forming the mold layer 200, forming the base 100 (S400), and separating the mold layer 200 (S500).

In step S100 of forming the structure layer 20 ', a plurality of microspheres 21' are coated on one surface of the support 10 '. At this time, the plurality of microspheres 21 'are coated so as to be dispersed adjacent to each other. Here, the support 10 'is a member coated with the microspheres 21', and the microspheres 21 'coated on one surface of the support 10' are attached to form the structure layer 20 ' . When the structure layer 20 'is formed, a protective layer 30' is formed.

Step S200 of forming the protective layer 30 'is a step of coating a ceramic solution on the structure layer 20'. Here, the ceramic solution is coated so that a plurality of hemispherical convex portions 31 'corresponding to the surface shape of the microspheres 21' are arranged. Specifically, by coating the ceramic solution along the surface of the microspheres 21 ', a protrusion 31' is formed on one side of the protective layer 30 'while the ceramic solution is cured. Here, the ceramic solution may be a silica (SiO ₂ ) -based solution, but is not limited thereto.

On the other hand, at the time of coating the ceramic solution, the surface portion 30'a between one of the projecting portions 31 'and the other projecting portion 31' on one side of the protective layer 30 'can be coated flat. That is, the ceramic solution is coated so that the surface of the ceramic solution between one of the adjacent microspheres 21 'and the other microspheres 21' is flat. Thus, the convex portion 220 (see Figs. 3 to 4) of the mold layer 200 can be formed flat.

On the other hand, after the ceramic solution is coated, it may further include a heat treatment step. Through this heat treatment step, the workability of the protective layer 30 'can be improved, and the structure can be dense and stable. Here, it is possible to further perform the vacuum treatment before the heat treatment step after the ceramic solution coating, so as to prevent the penetration of the ceramic solution due to the air layer between the microspheres 21 ', that is, for uniform coating.

After the protective layer 30 'is formed, a step S300 of forming the mold layer 200 is performed. In step S300 of forming the mold layer 200, a metal is deposited along one side of the protective layer 30 ', where the metal may include nickel (Ni). However, the metal forming the mold layer 200 is not necessarily limited to nickel. As the metal is deposited on the protective layer 30 ', recesses 210 (see FIGS. 3 to 4) and protrusions (convex portions) are formed on one surface of the mold layer 200 corresponding to one surface of the protective layer 30' 220, Figs. 3 to 4) is repeatedly formed. At this time, the concave portion 210 of the mold layer 200 is formed corresponding to the protruding portion 31 'of the protective layer 30', and the convex portion 220 of the mold layer 200 is formed at any one of the protruding portions 31 ' Is formed corresponding to the surface of the protective layer 30 'between the protruding portion 31' and the other protruding portion 31 '. At this time, when the surface of the portion of the protective layer 30 'between any one of the protrusions 31' and the other protrusions 31 'is formed flat, it is flattened accordingly. Here, one surface of the mold layer 200 means a surface of the mold layer 200 adjacent to the protective layer 30 '. When the mold layer 200 is formed, the base 100 is formed on the other surface of the mold layer 200.

A predetermined material is deposited on the other surface of the mold layer 200 to form the base 100 in the step of forming the base 100 (S400). A predetermined material constituting the base 100 may be a metal, silica, or a polymer, and it is preferable to use a metal in order to prevent cracking or deformation while the molding process is repeated. However, it is not necessarily limited to metal. When the base 100 is formed, the mold layer 200 is separated.

In the step S500 of separating the mold layer 200, the mold layer 200 is separated from the protective layer 30 ', at this time, the mold layer 200 is coupled with the base 100. Here, in order to separate the mold layer 200 from the protective layer 30 ', water may be injected between the mold layer 200 and the protective layer 30'. Particularly, when the protective layer 30 'is formed by the silica-based solution and the mold layer 200 is formed of a metal such as nickel (Ni), the adhesion between the mold layer 200 and the protective layer 30' When the water penetrates the interface, the mold layer 200 and the protective layer 30 'are separated from each other. However, in order to separate the mold layer 200 and the protective layer 30 ', it is not always necessary to inject water, and in consideration of the material characteristics of the mold layer 200 and the protective layer 30' It is removable.

When the mold layer 200 is separated from the protective layer 30 ', the mold of the super-water repellent metal mold of the present invention is manufactured, the polymer is molded on one surface of the mold layer 200, Can be produced.

Meanwhile, the manufacturing method of the super water repellent body manufacturing mold according to the present embodiment may further include forming the wear resistant layer 300 (S600). Here, the wear resistant layer 300 is formed on one surface of the mold layer 200 by coating the wear resistant material having a hardness relatively higher than that of the mold layer 200. Specifically, the abrasion-resistant layer 300 can be formed through a DLC coating or a ceramic coating. However, in order to form the abrasion-resistant layer 300, it is not always necessary to use a DLC coating or a ceramic coating, and all known methods can be used.

Hereinafter, effects of the super-water-repellent metal mold produced by the manufacturing method according to the present invention will be described.

FIG. 9 is a scanning electron microscope (SEM) photograph of a mold for preparing an ultra water-repellent body according to an embodiment of the present invention, 11 is a scanning electron microscope (SEM) photograph of a mold for preparing a super water repellent body according to an embodiment of the present invention before and after iterative molding, and FIG. 12 is a photograph of a super water repellent A contact angle change with respect to the number of times of molding of the super water repellent body manufactured according to the sieve manufacturing mold.

Fig. 9 (a) shows the surface of the stationary mold, and Fig. 9 (b) shows the surface of the stationary mold. Fine irregularities are formed on each surface, and when the polymer is deposited on the surface, a super water repellent structure is formed as shown in Fig.

Fig. 10 (a) shows the surface of the super-water-repellent polymer structure and Fig. 10 (b) shows the contact angle measured by the inverse structure mold. Thus, it can be seen that the super water repellent structure can be easily realized through the mold for manufacturing the super water repellent body according to the present invention.

 11, it can be confirmed that the surface shape of the mold for manufacturing the super water repellent body according to the present invention is maintained even if the repetitive molding process is performed. Here, FIG. 11A is a front structural die, and FIG. 11B is a surface photograph of an inverted structural die. Also, in FIG. 12, it can be seen that even when the molding process is repeated, the contact angle of the prepared super water-repellent polymer structure is kept substantially constant. In this case, it can be deduced that the dies according to the present invention are excellent in durability and are very effective for the mass production of the super water repellent body.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification or improvement is possible.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

1: polymer 10, 100: base
10 ': Support 20, 20': Structure layer
21, 21 ': microspheres 30, 30': protective layer
31: protrusion 40, 200: mold layer
41, 210: recess 42, 220:
45: bonding layer 47: forming layer
110: recess 300: abrasion resistant layer

Claims (24)

Base;
A structure layer in which a plurality of fine holes are dispersed adjacent to each other on one surface of the base;
A protective layer coated on the structure layer to fix the microspheres and having a plurality of hemispherical convex portions corresponding to a surface shape of the microspheres formed on one surface; And
A concave portion and a convex portion corresponding to the one surface shape of the protective layer are repeatedly formed on the outer surface of the protective layer, and when the polymer is molded by the polymer, A mold layer to be formed;
Wherein the mold is a super-water repellent mold.
The method according to claim 1,
The micro-
And a diameter of 100 nm to 10 탆.
The method according to claim 1,
The micro-
Preparation mold of super water repellant made of silica.
The method according to claim 1,
The protective layer
A mold for manufacturing an ultra water repellent body formed by coating a ceramic solution.
The method according to claim 1,
The mold layer
A bonding layer having one surface thereof adhered to the protective layer; And
A forming layer joined to the other surface of the bonding layer on one surface, molded on the other surface with the polymer, and separated from each other after the superhydrophobic structure is formed;
/ RTI >
Wherein the bonding layer has a greater bonding force for bonding with the protective layer relative to the forming layer, and the forming layer has a lower bonding force for bonding with the polymer relative to the bonding layer.
The method of claim 5,
The bonding layer
Wherein at least one of titanium (Ti), nickel (Ni), and chromium (Cr) is contained.
The method of claim 5,
The shaping layer
Wherein at least one of gold (Au), silver (Ag), platinum (Pt), and copper (Cu) is contained.
A base embedded in a hemispherical shape from one surface and having a plurality of recesses spaced apart at a predetermined interval; And
A concave portion and a convex portion corresponding to the shape of one surface of the base are repeatedly formed on the outer surface of the base and the super water-repellent surface is formed on the polymer when the polymer is coated A mold layer;
Wherein the mold is a super-water repellent mold.
The method of claim 8,
The convex portion of the mold layer
A mold for manufacturing a super water repellent body formed flat.
The method of claim 8,
An abrasion resistant layer disposed bending along the outer surface of the mold layer and having a hardness relatively higher than that of the mold layer;
Further comprising an extruder.
(a) coating a plurality of microspheres on one surface of a base such that the microspheres are dispersed adjacent to each other to form a structure layer;
(b) coating a ceramic solution on the structural layer so that a plurality of semi-spherical convex protrusions corresponding to the surface shape of the microspheres are arranged on one surface, thereby forming a protective layer; And
(c) forming a mold layer on the outer surface by depositing a metal along one surface of the protective layer so that a concave portion and a convex portion corresponding to the one surface shape of the protective layer are repeatedly formed;
Wherein the method comprises the steps of:
The method of claim 11,
The step (b)
The ceramic solution is coated and then heat-treated, or
A step of vacuum-treating the ceramic solution after coating, and heat-treating the ceramic solution;
Wherein the method comprises the steps of:
The method of claim 11,
The step (c)
Depositing a first metal on the protective layer to form a bond layer; And
Depositing a second metal on the bonding layer to form a shaping layer;
/ RTI >
Wherein the first metal has a greater bonding force for bonding with the ceramic relative to the second metal and the second metal has a lower bonding force for bonding with the polymer relative to the first metal.
The method of claim 11,
The micro-
A method for producing a super-water repellent fabricable mold having a diameter of 100 nm to 10 탆.
The method of claim 11,
The micro-
A method for manufacturing a mold for manufacturing an ultra water repellent body formed of silica.
14. The method of claim 13,
The first metal
Wherein at least one of titanium (Ti), nickel (Ni), and chromium (Cr) is formed.
14. The method of claim 13,
The second metal
Wherein at least one of gold (Au), silver (Ag), platinum (Pt), and copper (Cu) is contained.
(a) coating a plurality of microspheres on one surface of a support so as to be dispersed adjacent to each other to form a structure layer;
(b) coating a ceramic solution on the structural layer so that a plurality of semi-spherical convex protrusions corresponding to the surface shape of the microspheres are arranged on one surface, thereby forming a protective layer;
(c) depositing a metal on one surface of the protective layer to form a mold layer such that a concave portion and a convex portion corresponding to the one surface shape of the protective layer are repeatedly formed;
(d) depositing a predetermined material on the other surface of the mold layer to form a base; And
(e) separating the mold layer coupled to the base from the protective layer;
Wherein the method comprises the steps of:
19. The method of claim 18,
The step (b)
The ceramic solution is coated and then heat-treated, or
A step of vacuum-treating the ceramic solution after coating, and heat-treating the ceramic solution;
Wherein the method comprises the steps of:
19. The method of claim 18,
The metal in step (c)
A method for manufacturing a mold for manufacturing an ultra water repellent body containing nickel (Ni).
19. The method of claim 18,
The step (e)
And injecting water between the mold layer and the protective layer to separate the mold layer and the protective layer.
19. The method of claim 18,
After the step (e)
Forming a wear-resistant layer on one surface of the mold layer by coating an abrasion-resistant material having a hardness relatively higher than that of the mold layer;
Further comprising the steps of:
19. The method of claim 18,
Wherein the ceramic solution is a silica (SiO ₂ ) -based solution.
19. The method of claim 18,
The step (b)
And coating the ceramic with the surface of the ceramic solution between any one of the adjacent microspheres and the other microspheres being flat.

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