KR101799560B1 - Stamp for Making Micro-scale Surface Wrinkles, Method for Manufacturing the Same, And Method for Fabricating Micro-scale Surface Wrinkles On Structures Using the Stamp - Google Patents

Stamp for Making Micro-scale Surface Wrinkles, Method for Manufacturing the Same, And Method for Fabricating Micro-scale Surface Wrinkles On Structures Using the Stamp Download PDF

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Publication number
KR101799560B1
KR101799560B1 KR1020160013563A KR20160013563A KR101799560B1 KR 101799560 B1 KR101799560 B1 KR 101799560B1 KR 1020160013563 A KR1020160013563 A KR 1020160013563A KR 20160013563 A KR20160013563 A KR 20160013563A KR 101799560 B1 KR101799560 B1 KR 101799560B1
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KR
South Korea
Prior art keywords
stamp
wrinkle
micro
resin
pattern
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KR1020160013563A
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Korean (ko)
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KR20170092341A (en
Inventor
박상후
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부산대학교 산학협력단
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Priority to KR1020160013563A priority Critical patent/KR101799560B1/en
Publication of KR20170092341A publication Critical patent/KR20170092341A/en
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Publication of KR101799560B1 publication Critical patent/KR101799560B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
    • B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/42—Moulds or cores; Details thereof or accessories therefor characterised by the shape of the moulding surface, e.g. ribs or grooves
    • B29C33/424—Moulding surfaces provided with means for marking or patterning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/34—Component parts, details or accessories; Auxiliary operations
    • B29C41/38—Moulds, cores or other substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/16—Surface shaping of articles, e.g. embossing; Apparatus therefor by wave energy or particle radiation, e.g. infrared heating
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
    • C08L83/04—Polysiloxanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/42—Moulds or cores; Details thereof or accessories therefor characterised by the shape of the moulding surface, e.g. ribs or grooves
    • B29C33/424—Moulding surfaces provided with means for marking or patterning
    • B29C2033/426—Stampers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2083/00—Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as moulding material

Abstract

The present invention relates to a method of forming micro-scale fine wrinkle patterns on the surface of a structure using a stamp for manufacturing a micro-surface wrinkle, which is made of a light-transmitting resin material capable of transmitting ultraviolet light and has a master wrinkle pattern of engraved on at least one surface thereof The present invention relates to a method of manufacturing a micro-surface wrinkle on a surface of a structure using a stamp according to the present invention, comprising the steps of: (S11) applying a resin to a surface of a stamp on which a master wrinkle pattern is formed, step; (S12) adhering the surface of the stamp on which the master wrinkle pattern is formed to the surface of the structure; (S13) curing the resin between the master wrinkle pattern of the stamp and the structure; (S14) separating the stamp from the surface of the structure; And a control unit.

Description

Technical Field [0001] The present invention relates to a micro-scale surface wrinkle production method and a micro-scale surface wrinkle production method,

The present invention relates to an apparatus for forming a micro-scale fine wrinkle pattern on the surface of a structure, and more particularly, to a method for manufacturing a micro-scale fine wrinkle pattern on a surface of a structure, To a method of forming a micro-scale micro-wrinkle pattern locally on the surface.

The surface wrinkles formed on the surface of the object act to increase the surface area to improve the heat transfer efficiency, or to perform the action by promoting the reaction using the wider surface area, the super hydrophobic action, and the like.

Recently, attention has been recently paid to the wrinkle structure of the surface, and various researches have been made on the technology of making and applying a micro-scale wrinkle structure on the surface of an object.

Conventionally, as a method of forming a wrinkle structure on the surface of an object, there is a method in which a surface of a substrate made of a resin material having elasticity is treated with plasma or UV ozone to form a wrinkle in a desired shape, or a photocurable resin spin- Followed by rapid heating at a high temperature plate to produce surface wrinkles.

However, it is almost impossible to form fine wrinkles locally only at necessary positions of the structure, and the process of making wrinkles is also very complicated.

There is also a method in which fine wrinkles are formed on the inner surface of a cavity of a mold by injection molding to form fine wrinkles on the surface of an object, but there is a problem in that it is expensive to manufacture a mold.

Japanese Unexamined Patent Application Publication No. 2009-172860 (Aug. 6, 2009) Patent Registration No. 10-1176490 (Aug. 17, 2012) Japanese Patent Application Laid-Open No. 10-1317509 (Apr. 10, 2013)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a method of forming a micro-scale wrinkle pattern on a surface of a structure, It is an object of the present invention to provide a stamp for manufacturing a micro surface wrinkle, a method for manufacturing the same, and a micro surface wrinkle manufacturing method using the stamp.

According to an aspect of the present invention, there is provided a stamp for fabricating a micro-surface wrinkle, the micro-surface wrinkle stamp comprising: a light transmitting resin material capable of transmitting ultraviolet light; And a master wrinkle pattern of a corresponding engraved pattern is formed.

The method for manufacturing a micro surface wrinkle producing stamp according to the present invention comprises:

(S1) applying a photocurable resin to a substrate;

(S2) curing the surface of the photocurable resin to cause photopolymerization in the photocurable resin to cause photopolymerization in the thickness direction, and shrinking to form an embossed fine wrinkle pattern;

(S3) applying a light-transmitting resin on the embossed micro-wrinkle pattern of the substrate;

(S4) curing the light-transmitting resin;

(S5) separating the light-transmitting resin from the substrate to obtain a stamp having a master wrinkle pattern engraved on one surface thereof;

And a control unit.

A method of manufacturing a micro-surface wrinkle on a surface of a structure using a stamp according to the present invention,

(S11) applying resin to the surface of the stamp on which the master wrinkle pattern is formed or applying resin to the surface of the structure;

(S12) adhering the surface of the stamp on which the master wrinkle pattern is formed to the surface of the structure;

(S13) curing the resin between the master wrinkle pattern of the stamp and the structure;

(S14) separating the stamp from the surface of the structure;

And a control unit.

According to the present invention, a micro-wrinkle pattern can be formed on the surface of a structure by irradiating ultraviolet rays while closely contacting the surface of the structure on which the fine wrinkle pattern is to be formed by putting the photocurable resin on the stamp on which the master wrinkle pattern is formed . Thus, it is possible to easily and quickly form a fine wrinkle pattern locally at a desired portion of the structure.

1 is a cross-sectional view illustrating a stamp for fabricating a micro surface wrinkle according to an embodiment of the present invention.
2 is a view for explaining a method of manufacturing a micro surface wrinkle stamp according to the present invention.
FIG. 3 is a microphotograph showing the shape of a fine wrinkle pattern formed on a photocurable resin over time during the process of manufacturing a micro surface wrinkle production stamp.
4 is a cross-sectional view illustrating another embodiment of a method for manufacturing a micro surface wrinkle production stamp according to the present invention.
5 is a view illustrating a process of forming fine wrinkle patterns on the surface of a planar structure using a stamp for manufacturing a micro surface wrinkle according to the present invention.
6 is a view for explaining an example of forming fine wrinkle patterns on the surface of a curved structure using a stamp for micro surface wrinkle production according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a micro surface wrinkle production stamp according to the present invention, a manufacturing method thereof, and a micro surface wrinkle production method using the stamp will be described in detail with reference to the accompanying drawings.

1 shows a stamp 1 for making a micro-surface wrinkle according to an embodiment of the present invention. The stamp 1 of this embodiment has a micro-scale micro-wrinkle pattern corresponding to a micro- And a master wrinkle pattern 2 of a negative angle is formed.

Preferably, the stamp 1 is made of porous polydimethylsiloxane (PDMS) through which air can pass. The stamp 1 is preferably made of a light transmissive resin material through which ultraviolet light can pass. Do. When the stamp 1 is made of polydimethylsiloxane (PDMS), when the master pleating pattern 2 of the stamp 1 is made to adhere to the surface of the structure by applying resin to the structure (see Figs. 4 and 5) And the surface of the structure are discharged to the outside through the stamp 1 so that an air trap is not generated between the master wrinkle pattern 2 and the structure surface.

The master wrinkle pattern 2 formed on the lower surface of the stamp 1 is formed in an engraved pattern corresponding to a microscale fine wrinkle pattern to be formed on the structure and is formed on the surface of the structure by the master wrinkle pattern 2 An embossed fine wrinkle pattern can be formed.

A method of manufacturing the stamp 1 of the present invention will be described with reference to FIG.

First, a mold 11 is formed on the upper surface of the substrate 10, and a photocurable resin is applied to form a master wrinkle pattern in the cavity of the mold 11 (step S1). At this time, ultraviolet (UV) curable epoxy resin (for example, trade name NOA 68T) may be used as the photocurable resin, and the resin is thinly coated to a predetermined thickness using a brush.

When the photocurable resin 12 is applied on the substrate 10 in a predetermined thickness and then the ultraviolet rays are irradiated to the photocurable resin 12 for a short period of time, the surface of the photocurable resin 12 is hardened and the surface A weak photopolymerization is generated in the photocurable resin in the thickness direction. If a thermal curing or drying process is performed in this state, a micro-pleated pattern 12a embossed on the surface is formed by a material gradient generated in the photocurable resin (step S2). FIG. 3 shows the shape of fine wrinkle patterns formed on the photocurable resin with the lapse of time. The fine wrinkle pattern 12a formed by shrinking the photopolymerizable layer of the resin may be formed in various shapes such as dots, short lines, and irregular lines.

When the micro-wrinkle pattern 12a is formed on the substrate 10 in a positive angle, the PDMS resin as the light-transmitting resin is supplied to the upper surface of the substrate 10 (step S3).

Heat is then applied to the PDMS resin during the set time (e.g., 3 hours) to cure the PDMS resin (step S4). Then, when the cured PDMS resin is separated from the substrate 10, the stamp 1 having the master pleat pattern 2 corresponding to the fine pleat pattern 12a engraved on the lower surface thereof is obtained (step S5).

The master wrinkle pattern 2 of the stamp 1 may vary depending on the amount of light, amount of heat, irradiation time, and the like of the ultraviolet light irradiated in step S2. In step S1, Fine wrinkle patterns can be formed by different thicknesses.

4, a mold 11 having a plurality of grooves 11a different in height is formed on the upper surface of the substrate 10 in step S1, The photocurable resin 12 is applied to the inside of the groove to form a different thickness of the photocurable resin formed in each of the grooves and then the photocurable resin 12 is irradiated with ultraviolet rays and thermally cured or dried, When the pattern is formed, micro-pleated patterns 12a having different patterns are formed for respective thickness regions.

By using the stamp 1 of the present invention made through the above-described process, it is possible to form a fine wrinkle pattern locally at a desired portion of the surface of the structure.

That is, as shown in FIG. 5, the photocurable resin is applied to the lower surface of the stamp 1 on which the master pleating pattern 2 is formed or the resin is applied to the surface of the structure (step S11). Then, the surface on which the master wrinkle pattern of the stamp is formed is brought into close contact with the surface of the structure 20 (Step S12), and ultraviolet rays are irradiated from above the stamp 1 to form a gap between the master wrinkle pattern 2 and the structure 20 (Step S13). Since the stamp 1 is made of a transparent PDMS resin through which light is transmitted, ultraviolet light can be transmitted through the stamp 1 to cure the photo-curing resin.

The photocuring resin between the master wrinkle pattern 2 and the structure 20 is completely cured and the stamp 1 is separated from the surface of the structure 20 (step S14) The micro-wrinkle pattern 21, that is, micro-surface wrinkles, is left on the surface of the structure 20.

The stamp 1 of the present invention may be formed on the flat surface of the structure 20 as shown in Fig. 5, but since the stamp 1 is made of a PDMS resin material having elasticity, Elastic deformation is possible in a form corresponding to the curved surface portion of the base 20. 6, the stamp 1 can be elastically deformed to bring the surface of the stamp 1, on which the master pleating pattern 2 is formed, into close contact with the curved surface of the structure 20 to form the fine pleating pattern 21 .

As described above, according to the present invention, when the stamp 1 on which the master crease pattern 2 is formed is immersed in a photo-curing resin to adhere to the surface of the structure to be formed with fine wrinkle patterns and irradiated with ultraviolet rays, A fine wrinkle pattern can be formed on the surface. Thus, it is possible to easily and quickly form a fine wrinkle pattern locally at a desired portion of the structure.

On the other hand, as described above, the stamp 1 can be used as it is in the originally produced form when the stamp 1 is brought into close contact with the surface of the structure 20 to replicate the fine wrinkle pattern 21. However, Thereafter, when a compressive load or a tensile load is applied to both ends of the stamp 1, compressive deformation or tensile deformation occurs, and the master pleat pattern 2 of the stamp 1 may have a shape different from the original shape. Therefore, when the micro-wrinkle pattern 21 is replicated locally on the surface of the structure 20, the pre-strain is applied to the micro-wrinkle pattern 21, and the deformation of the stamp 1 is used, . ≪ / RTI >

The stamp for manufacturing micro surface wrinkles of the present invention can be applied to a wide variety of fields. It can be used, for example, to create a fine wrinkle pattern locally on the surface of the channel through which the fluid flows to change the flow rate or flow characteristics of the fluid, or to form water repellent or hydrophobic protrusion patterns on the surface of the object, .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the present invention as defined by the appended claims. And it is to be understood that such modified embodiments belong to the scope of protection of the present invention defined by the appended claims.

1: Stamp 2: Master wrinkle pattern
10: substrate 11: mold
11a: groove 12: photocurable resin
12a: fine wrinkle pattern 20: structure
21: Fine wrinkle pattern (micro surface wrinkles)

Claims (10)

delete delete A method for manufacturing a microstructure wrinkle-forming stamp which is made of a light transmitting resin material capable of transmitting ultraviolet light and has a master wrinkle pattern corresponding to a micro-scale fine wrinkle pattern to be formed on the surface of a structure on at least one surface thereof As a result,
(S1) applying a photocurable resin to a substrate;
(S2) curing the surface of the photocurable resin to cause photopolymerization in the photocurable resin to cause photopolymerization in the thickness direction, and shrinking to form an embossed fine wrinkle pattern;
(S3) applying a light-transmitting resin on the embossed micro-wrinkle pattern of the substrate;
(S4) curing the light-transmitting resin;
(S5) separating the light-transmitting resin from the substrate to obtain a stamp having a master wrinkle pattern engraved on one surface thereof;
Lt; / RTI >
In the step (S1), a mold having a plurality of grooves having different heights is placed on the upper surface of the substrate, and the thickness of the photocurable resin formed on each groove by applying a photocurable resin to the inside of the grooves of the mold Is formed on the surface of the micro-surface wrinkle. 4. The method according to claim 3, wherein in step (S1), a photocurable resin is applied to a predetermined thickness using a brush. The method of claim 3, wherein the step (S2) comprises irradiating the photocurable resin on the substrate with ultraviolet light to generate a curing and polymerization reaction, and applying heat or drying at room temperature to form a fine wrinkle pattern embossed in the photocurable resin Wherein the micro-surface wrinkle production stamp is produced by a method comprising the steps of: delete delete delete delete delete
KR1020160013563A 2016-02-03 2016-02-03 Stamp for Making Micro-scale Surface Wrinkles, Method for Manufacturing the Same, And Method for Fabricating Micro-scale Surface Wrinkles On Structures Using the Stamp KR101799560B1 (en)

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KR1020160013563A KR101799560B1 (en) 2016-02-03 2016-02-03 Stamp for Making Micro-scale Surface Wrinkles, Method for Manufacturing the Same, And Method for Fabricating Micro-scale Surface Wrinkles On Structures Using the Stamp

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KR1020160013563A KR101799560B1 (en) 2016-02-03 2016-02-03 Stamp for Making Micro-scale Surface Wrinkles, Method for Manufacturing the Same, And Method for Fabricating Micro-scale Surface Wrinkles On Structures Using the Stamp

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KR101799560B1 true KR101799560B1 (en) 2017-11-20

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EP3633453B1 (en) * 2018-10-03 2023-12-27 ZKW Group GmbH Method for the preparation of (sub)-microstructures on curved surfaces of an optical component

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