KR20010028137A - Method for producing photocatalyst film and photocatalyst film produced by the same - Google Patents
Method for producing photocatalyst film and photocatalyst film produced by the same Download PDFInfo
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- KR20010028137A KR20010028137A KR1019990040211A KR19990040211A KR20010028137A KR 20010028137 A KR20010028137 A KR 20010028137A KR 1019990040211 A KR1019990040211 A KR 1019990040211A KR 19990040211 A KR19990040211 A KR 19990040211A KR 20010028137 A KR20010028137 A KR 20010028137A
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- photocatalyst
- water
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- thin film
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- 239000011941 photocatalyst Substances 0.000 title claims abstract description 48
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 239000010408 film Substances 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000000758 substrate Substances 0.000 claims abstract description 17
- 239000010409 thin film Substances 0.000 claims abstract description 15
- 239000004033 plastic Substances 0.000 claims abstract description 6
- 229920003023 plastic Polymers 0.000 claims abstract description 6
- 238000007598 dipping method Methods 0.000 claims abstract description 4
- 239000011521 glass Substances 0.000 claims abstract description 4
- 238000004528 spin coating Methods 0.000 claims abstract description 4
- 238000005507 spraying Methods 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims abstract description 3
- 239000002184 metal Substances 0.000 claims abstract description 3
- 239000011241 protective layer Substances 0.000 claims description 4
- 239000004809 Teflon Substances 0.000 claims description 3
- 229920006362 Teflon® Polymers 0.000 claims description 3
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 229910015902 Bi 2 O 3 Inorganic materials 0.000 claims description 2
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 2
- 229910002367 SrTiO Inorganic materials 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 3
- 230000000844 anti-bacterial effect Effects 0.000 abstract description 3
- 238000004332 deodorization Methods 0.000 abstract description 3
- 239000007921 spray Substances 0.000 abstract description 2
- 230000000843 anti-fungal effect Effects 0.000 abstract 1
- 235000013311 vegetables Nutrition 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 241000209094 Oryza Species 0.000 description 3
- 235000007164 Oryza sativa Nutrition 0.000 description 3
- 230000001699 photocatalysis Effects 0.000 description 3
- 235000009566 rice Nutrition 0.000 description 3
- 239000004408 titanium dioxide Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000003373 anti-fouling effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 1
- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000001877 deodorizing effect Effects 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003075 superhydrophobic effect Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2201/00—Polymeric substrate or laminate
- B05D2201/02—Polymeric substrate
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Catalysts (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Abstract
Description
본 발명은 함수성 막의 제조방법 및 상기 방법에 의해 제조된 함수성 막에 관한 것으로서, 보다 상세하게는 광촉매를 이용한 함수성 막의 제조방법 및 제조된 함수성 막에 관한 것이다.The present invention relates to a method for producing a water-containing film and a water-soluble film produced by the above method, and more particularly, to a method for producing a water-containing film using a photocatalyst and a water-soluble film produced.
광촉매 연구는 초기 태양 에너지의 전환 및 저장에 관련된 분야들로부터 발전하여, 최근에는 물의 정수, 폐수처리, 냉장고나 차량 내부와 같은 각종 공간의 탈취 등 광촉매 존재하에 자외선 등의 빛을 조사함으로써 다양한 종류의 유기 화합물을 분해하는 연구가 활발히 진행되고 있다.Photocatalyst research has been developed from the fields related to the conversion and storage of the early solar energy, and recently, various types of photocatalysts are irradiated with ultraviolet light in the presence of photocatalysts such as water purification, wastewater treatment, and deodorization of various spaces such as refrigerators or inside a vehicle. There is an active research to decompose organic compounds.
광촉매에 대한 연구는 1839년 Becquerel이 염화은 전극을 전해질 용액에 담근 후 짝전극과 연결하여 전압과 전류가 발생하는 현상을 발견한 것에서 시작되었으며, TiO2단결정 전극에 빛을 조사시켰을 때 물이 수소와 산소로 분해되는 것을 1972년 일본의 후지시마(Fujishima)와 혼다(Honda)가 보고하면서부터 광촉매 연구는 급격히 발전하였다.The study of photocatalysts began in 1839 when Becquerel discovered the phenomenon of voltage and current by dipping a silver chloride electrode in an electrolyte solution and connecting it with a counter electrode. When water was irradiated on a TiO 2 single crystal electrode, Photocatalyst research has evolved rapidly since the breakdown of oxygen in 1972 by Fujishima and Honda, Japan.
광촉매란 반도체의 에너지 밴드갭 구조를 이해하면 쉽게 설명될 수 있다. 근래들어 각광받고 있는 광촉매 중의 하나인 이산화티탄을 예로써 설명하면 다음과 같다.Photocatalyst can be easily explained by understanding the energy bandgap structure of the semiconductor. Titanium dioxide, which is one of the photocatalysts that are in the spotlight in recent years, is described as follows.
이산화티탄에 광에너지가 가해지면 가전자대의 전자가 전도대로 여기되면서 가전자대에 정공을 만들게 되며, 이때 여기된 전자와 생성된 정공이 산화환원 반응을 일으켜 광촉매 특성이 나타나게 된다. 이와 같이 생성된 광촉매는 전자와 정공의 반응에 따라 강한 분해력을 갖는 특성과 초친수성의 특성을 갖게 된다.When light energy is applied to titanium dioxide, electrons in the valence band are excited as conduction bands to form holes in the valence band. At this time, the excited electrons and the generated holes cause a redox reaction, resulting in photocatalytic properties. The photocatalyst produced as described above has strong decomposability and superhydrophilic properties depending on the reaction between electrons and holes.
광촉매의 분해력 특성은 공기중의 산소가 전자와 반응하고 수증기가 정공과 반응하여 분해력이 뛰어난 활성 산소를 발생시키게 되는 것으로서, 상기 발생된 활성 산소는 표면에 흡착되는 유기물을 분해시키는 능력을 갖는다.The photocatalytic property of the photocatalyst is that oxygen in the air reacts with electrons and water vapor reacts with holes to generate active oxygen having excellent decomposition ability. The generated active oxygen has an ability to decompose organic substances adsorbed on the surface.
한편, 광촉매의 초친수성 특성은 이산화티탄을 구성하고 있는 2개의 산소중 하나가 공기중의 수증기와 반응하여 광촉매의 표면에 친수기인 OH기가 생성되는 것으로서, 이로 인해 광촉매가 초친수성을 띠게 되는 것이다.On the other hand, the superhydrophilic property of the photocatalyst is that one of two oxygen constituting titanium dioxide reacts with water vapor in the air to generate OH groups, which are hydrophilic groups, on the surface of the photocatalyst, thereby making the photocatalyst superhydrophilic.
이와 같은 광촉매의 각 특성을 활용하여, 최근에는 상기 강한 분해력을 이용하여 방오, 항균, 탈취 등 환경 정화에 광촉매를 이용하는 한편, 초친수성 특성으로부터 야기되는 방운(김서림 방지) 작용을 이용하여 자동차 미러나 욕실의 거울 등에 광촉매를 적용하고 있다. 또한 상기 초친수성 광촉매는 이외에도 냉장고나 전기밥솥, 비닐하우스 등에 적용될 수 있는 데, 이를 도 1을 참조하여 설명하면 다음과 같다.By utilizing each of the characteristics of the photocatalyst, the photocatalyst has been recently used for the purification of the environment such as antifouling, antibacterial, and deodorizing by using the strong degrading power, and by using the anti-fog (anti-fog) action resulting from the superhydrophilic characteristics, The photocatalyst is applied to the mirror of a bathroom. In addition, the superhydrophilic photocatalyst may be applied to a refrigerator, an electric rice cooker, a plastic house, and the like, which will be described below with reference to FIG. 1.
도 1은 종래 냉장고 야채실에서 수분이 형성되어 아래로 떨어지게 되는 형상을 묘사한 모식도이다.1 is a schematic diagram illustrating a shape in which water is formed in a conventional refrigerator vegetable room and falls down.
도 1 좌측의 하얗게 처리된 사각 도형은 종래 야채실의 천정이 소수성으로 처리되어 있음을 나타낸 것이며, 우측은 소수성 천장으로부터 무작위로 분포되어 있는 물방울들이 아래로 계속 떨어지는 형상을 묘사한 것이다.The white square on the left side of FIG. 1 shows that the ceiling of a conventional vegetable room is treated hydrophobicly, and the right side depicts a shape in which water droplets randomly distributed from the hydrophobic ceiling continue to fall down.
종래 밀폐된 공간에서 수분의 함량이 많은 냉장고의 야채실이나 전기밥솥의 뚜껑 부분, 그리고 비닐하우스의 윗 부분 등은 소수성의 글라스나 비닐, 아크릴 등의 플라스틱, 알루미늄, 또는 테프론 등의 재질로 제작되었고, 이 경우 내부의 수분은 천정 부분에 잠시 모여있다가 곧 아래로 떨어지게 된다. 이는 천정 부분에 맺히는 물방울이 고르지 않게(random) 분포하고 있고, 물과의 친화력이 작아 접촉각이 크게 되므로 쉽게 아래로 떨어지게 되기 때문이다. 이와 같은 작용에 의해, 종래에는 내용물의 신선도를 떨어뜨리거나 야채의 황백화 현상을 진행시키고 냉장중인 밥의 색깔을 변색시키는 경우가 많았다. 다른 한편으로, 내부의 수분이 제어되지 않아 야채실의 내부가 쉽게 관찰되지 않게 되므로 내용물을 확인할 때 오랫동안 문을 열어두게 되기 때문에 전기 사용료가 더 많이 드는 단점이 발생하였다.Conventionally, a vegetable compartment of a refrigerator, a lid of an electric rice cooker, and an upper part of a vinyl house, which have a high moisture content in an enclosed space, are made of a material such as hydrophobic glass, vinyl, acrylic, plastic, aluminum, or teflon. In this case, the moisture inside is gathered in the ceiling for a while and then falls down. This is because the water droplets formed on the ceiling are distributed unevenly, and the affinity with water is so small that the contact angle becomes large, so that they easily fall down. Due to such action, conventionally, the freshness of the contents is decreased, or the yellowing of the vegetables is advanced, and the color of the rice being refrigerated is often discolored. On the other hand, since the inside of the vegetable room is not easily observed because the moisture inside is not controlled, the door is opened for a long time when checking the contents, thus causing a drawback in using more electricity.
이와 같은 종래의 문제점들을 해결하기 위해 상기 천정 부분을 초친수성화시키려는 시도가 있어 왔으며, 그에 대한 연구가 진행되었다. 그러나, 초친수성 재료가 냉장고에 응용될 경우 야채실의 내부가 쉽게 보이기 때문에 전기 사용료 문제는 해결이 되나, 천정 부분에 맺히는 물방울들이 서로 쉽게 모여 큰 물방울이 형성되므로 뭉친 물방울들은 친수성으로 처리되지 않았을 때보다도 더 무거워져 쉽게 떨어지게 되므로 초친수화 처리를 행하지 않았을 때에 비해 더 큰 문제를 야기시키게 되는 문제가 발생하였다.In order to solve such a conventional problem, attempts have been made to superhydrophilize the ceiling portion, and research on it has been conducted. However, when the superhydrophilic material is applied to the refrigerator, the electricity bill problem is solved because the inside of the vegetable compartment is easily seen, but the water droplets formed on the ceiling part easily gather together to form a large water droplet, so the agglomerated droplets are not hydrophilic. It is heavier and easier to fall off, causing a problem that causes more problems than when the superhydrophilization treatment is not performed.
본 발명은 상기 안출된 문제점을 해결하기 위한 것으로서, 밀폐된 공간의 천정 표면에 소수성 영역에 의해 분리된 다수의 격자형 친수성 영역을 형성하여 물방울들이 뭉쳐서 아래로 떨어지게 되는 것을 방지하면서도 되도록 최대한 수분을 천정에 붙들어 놓을 수 있게 하는, 광촉매를 이용한 함수성 막의 제조방법을 제공하는 한편, 상기 제조방법에 의해 제조된 함수성 막을 제공함을 그 목적으로 한다. 본 발명에 따른 광촉매를 이용한 함수성 막은 상기 함수(含水) 작용 이외에도 광촉매의 다른 특성에서 기인한 탈취, 항균 및 방오 작용도 수행할 수 있다는 잇점이 있다.The present invention is to solve the above-mentioned problems, to form a plurality of lattice hydrophilic region separated by a hydrophobic region on the ceiling surface of the enclosed space to prevent the water droplets aggregated to fall down to the ceiling as much as possible It is an object of the present invention to provide a method for producing a water-soluble film using a photocatalyst, which can be held thereon, and to provide a water-soluble film produced by the above-mentioned method. The water-based film using the photocatalyst according to the present invention has the advantage that it can perform deodorization, antibacterial and antifouling action due to other properties of the photocatalyst in addition to the above water hydration action.
도 1은 종래 냉장고 야채실의 내부를 묘사한 모식도이고,1 is a schematic diagram depicting the interior of a conventional refrigerator vegetable room,
도 2는 본 발명에 따른 광촉매를 이용한 함수성 막에 있어 가능한 여러 가지 형태의 격자 구조를 나타낸 도면이고,FIG. 2 is a view showing various types of lattice structures possible in a functional film using a photocatalyst according to the present invention.
도 3은 본 발명에 따른 함수성 막을 적용하였을 경우 냉장고 야채실의 내부를 묘사한 모식도이다.Figure 3 is a schematic diagram depicting the interior of the refrigerator vegetable compartment when the water-soluble membrane according to the present invention is applied.
본 발명은 소수성 기판 위에 다수의 고립된 격자 구조로 이루어진 친수성 광촉매의 박막 또는 피막을 형성하는 단계를 포함하는 것을 특징으로 하는 광촉매를 이용한 함수성 막의 제조방법을 제공한다.The present invention provides a method for producing a functional film using a photocatalyst comprising forming a thin film or film of a hydrophilic photocatalyst having a plurality of isolated lattice structures on a hydrophobic substrate.
본 명세서에서 '격자 구조'라 함은 가로 세로의 선이 직각으로 교차하는 무뉘만을 의미하는 것이 아니라, 원형, 마름모꼴, 세모꼴 등 다양한 형태의 다각형 또는 폐곡선(격자)이 복수개 연이어 기판 위에 형성되어 있는 모양을 의미한다.In the present specification, the term "lattice structure" does not mean only a mutant in which horizontal and vertical lines cross at right angles, but a shape in which a plurality of polygons or closed curves (lattices) of various shapes such as circular, rhombic, and trigonal shapes are formed on a substrate in succession. Means.
또한, 본 명세서에서 '고립된 격자'라 함은 소수성 영역에 의해 하나하나의 친수성 광촉매의 격자가 분리되어 있음을 의미한다.In addition, the term "isolated lattice" in this specification means that the lattice of one hydrophilic photocatalyst is separated by a hydrophobic region.
이때, 상기 다수의 고립된 격자 구조로 이루어진 친수성 광촉매의 박막 또는 피막 영역은 소수성 기판의 영역보다 클 수 있다.In this case, the thin film or film region of the hydrophilic photocatalyst having the plurality of isolated lattice structures may be larger than the region of the hydrophobic substrate.
상기 기판은 유리, 플라스틱류 또는 알루미늄이나 스트레인레스와 같은 금속인 것이 바람직하다.The substrate is preferably glass, plastics or metal such as aluminum or strain.
본 발명의 제조방법에 사용되는 상기 광촉매는 TiO2, ZnO, SrTiO3, CdS, CaP, InP, In2O3, CaAs, BaTiO3, K2NbO3, F2O3, Ta2O5, WO3SaO2Bi2O3, NiO, Cu2OSiC, SiO2, MoS2, MoS3, InPb, RuO2및 CeO2중에서 선택될 수 있다.The photocatalyst used in the production method of the present invention is TiO 2 , ZnO, SrTiO 3 , CdS, CaP, InP, In 2 O 3 , CaAs, BaTiO 3 , K 2 NbO 3 , F 2 O 3 , Ta 2 O 5 , WO 3 SaO 2 Bi 2 O 3 , NiO, Cu 2 OSiC, SiO 2 , MoS 2 , MoS 3 , InPb, RuO 2 and CeO 2 .
한편, 상기 박막 또는 피막은 기판위에 고립 격자 구조로 형성하기 위한 방편으로 일정 형태의 마스크를 사용하여 딥핑, 스프레이 또는 스핀 코팅의 방법을 이용할 수 있는 데, 먼저 원하는 형태로 준비한 마스크를 기판 위에 접착한 후 광촉매 물질을 딥핑, 스프레이 또는 스핀 코팅 등을 이용하여 코팅을 행한 후 마스크를 제거함으로써 원하는 형태의 모양으로 이루어진 박막 또는 피막을 얻을 수 있다. 이때, 사용되는 기판은 모두 소수성이기 때문에 특별히 소수성을 위한 코팅을 따로 할 필요는 없다. 그러나, 격자간 분리 영역에 소수성을 좀더 부여하여 친수성 박막의 고립 격자 구조를 보다 확실히 하기 위해서 테프론 등과 같은 초소수성 물질을 광촉매 부분 외의 곳에 추가로 코팅하여도 좋다.On the other hand, the thin film or film can be used to dip, spray or spin coating method using a mask of a certain form as a way to form an isolated lattice structure on the substrate, first, a mask prepared in the desired form is adhered to the substrate After the photocatalytic material is coated by dipping, spraying or spin coating, the mask may be removed to obtain a thin film or a film having a desired shape. At this time, since the substrates are all hydrophobic, there is no need to provide a coating specifically for hydrophobicity. However, in order to make the isolated lattice structure of the hydrophilic thin film more confined by giving more hydrophobicity to the interstitial separation region, a superhydrophobic material such as Teflon may be further coated outside the photocatalyst portion.
나아가, 기판이 플라스틱과 같은 유기 물질의 경우에는 광촉매의 활성으로 인하여 기판이 손상되는 것을 방지하기 위하여, 상기 기판과 친수성 광촉매의 박막 또는 피막의 사이에 보호층을 추가로 형성하여 기판을 보호할 수 있는 데, 상기 보호층을 형성하는 재질로는 소수성 물질이 선택될 수 있다.Furthermore, in the case of the organic material such as plastic, the substrate may be further protected by forming a protective layer between the substrate and a thin film or film of the hydrophilic photocatalyst in order to prevent the substrate from being damaged by the activity of the photocatalyst. In some embodiments, a hydrophobic material may be selected as a material for forming the protective layer.
본 발명은 또한, 상기한 제조방법에 따라 제조되는 광촉매를 이용한 함수성 막을 제공한다.The present invention also provides a water-soluble film using a photocatalyst prepared according to the above-described manufacturing method.
이하 첨부된 도면을 참조하여 본 발명을 보다 상세히 설명하기로 한다.Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.
도 2는 본 발명의 제조방법에 따라 제조된 함수성 막의 여러 가지 형태의 격자 구조를 도시한 도면이다. 도면에서 어둡게 처리된 부분이 친수성 광촉매의 박막 부분이며, 하얗게 처리된 부분이 박막의 격자 사이를 분리하여 고립시키고 있는 부분이다. 도시된 바와 같이, 여러 가지 형태의 격자 구조가 가능하며, 격자간 분리 영역은 소수성 기판에 의해 또는 별도로 코팅된 소수성 물질에 의해 처리된다. 이와 같은 격자 구조의 광촉매 박막을 이용한 함수성 막을 냉장고의 야채실 등에 적용하였을 때의 모식도가 도 3에 도시되어 있다.FIG. 2 is a diagram illustrating various types of lattice structures of the functional film prepared according to the manufacturing method of the present invention. In the drawing, the darkened portion is a thin film portion of the hydrophilic photocatalyst, and the whitened portion is a portion separating and separating the lattice of the thin film. As shown, various types of lattice structures are possible, with the interstitial separation regions being treated by a hydrophobic substrate or by a separately coated hydrophobic material. The schematic diagram when the water-containing film using such a photocatalyst thin film of the lattice structure is applied to a vegetable room of a refrigerator or the like is shown in FIG. 3.
도 3 좌측의 사각 도형에서 어둡게 처리되어 있는 다수의 격자들은 친수성으로 처리되어 있는 함수성 막을 도시한 것으로서, 그 이외의 하얀 부분은 소수성 기판 또는 소수성 물질로 코팅되어 있는 영역을 도시한 것이다. 도 3 우측의 모식도는 물과의 접촉각이 작은 함수성 막이 수분을 다량으로 함유하게 되는 형상을 묘사한 것이다.In the rectangular figure on the left of FIG. 3, the dark lattice shows a hydrophilic hydrous film, and the other white portion shows a hydrophobic substrate or a region coated with a hydrophobic material. The schematic diagram on the right of FIG. 3 depicts a shape in which a functional film having a small contact angle with water contains a large amount of water.
도 3에 도시된 바와 같이, 본 발명에 따른 광촉매를 이용한 함수성 막을 냉장고의 야채실 천정에 적용할 경우 물과의 친화력이 큰 광촉매는 물과의 접촉각이 작아 물이 넓게 퍼져 있게 되므로 종래보다 상대적으로 많은 물을 함유할 수 있게 된다. 나아가, 냉장고의 경우 내부는 건조한 상태이므로 함수성 막에 퍼져있는 물이 시간이 지남에 따라 건조되기 때문에 물이 아래로 뭉쳐 떨어지는 것을 보다 방지할 수 있다.As shown in FIG. 3, when the water-based film using the photocatalyst according to the present invention is applied to the ceiling of a vegetable room of a refrigerator, the photocatalyst having a high affinity with water has a relatively small contact angle with water, so that the water is widely spread. It can contain a lot of water. Furthermore, in the case of the refrigerator, since the inside of the refrigerator is dry, the water spreading over the water-containing membrane is dried over time, thereby preventing the water from falling down.
본 발명에 따른 광촉매를 이용한 함수성 막의 제조방법 및 상기 방법에 의하여 제조된 함수성 막은 밀폐된 공간의 내부 수분을 보다 효과적으로 제어하게 함으로써 종래 수분으로 인해 발생하였던 냉장고의 신선도 저하 등의 문제를 해결한다.Method for producing a functional film using a photocatalyst according to the present invention and the functional film prepared by the method to solve the problems such as lowering the freshness of the refrigerator caused by the conventional moisture by more effectively controlling the internal moisture of the closed space. .
Claims (10)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20160137140A (en) * | 2015-05-22 | 2016-11-30 | 농업회사법인 (주)썬드림 | Apparatus for keeping freshness and suppressing browning of peeling garlic |
| KR20160137141A (en) * | 2015-05-22 | 2016-11-30 | 농업회사법인 (주)썬드림 | Method for keeping freshness and suppressing browning of peeling garlic |
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| JPH10128229A (en) * | 1996-11-01 | 1998-05-19 | Toto Ltd | Stainproofing film structure |
| WO1998025711A1 (en) * | 1996-12-13 | 1998-06-18 | Matsushita Electric Works, Ltd. | Functional coated articles, method of their production, and application thereof |
| EP0903389A1 (en) * | 1996-05-31 | 1999-03-24 | Toto Ltd. | Antifouling member and antifouling coating composition |
| EP0913447A1 (en) * | 1996-07-19 | 1999-05-06 | Toto Ltd. | Photocatalytic hydrophilic coating composition |
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| EP0903389A1 (en) * | 1996-05-31 | 1999-03-24 | Toto Ltd. | Antifouling member and antifouling coating composition |
| EP0913447A1 (en) * | 1996-07-19 | 1999-05-06 | Toto Ltd. | Photocatalytic hydrophilic coating composition |
| JPH10128229A (en) * | 1996-11-01 | 1998-05-19 | Toto Ltd | Stainproofing film structure |
| WO1998025711A1 (en) * | 1996-12-13 | 1998-06-18 | Matsushita Electric Works, Ltd. | Functional coated articles, method of their production, and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20160137140A (en) * | 2015-05-22 | 2016-11-30 | 농업회사법인 (주)썬드림 | Apparatus for keeping freshness and suppressing browning of peeling garlic |
| KR20160137141A (en) * | 2015-05-22 | 2016-11-30 | 농업회사법인 (주)썬드림 | Method for keeping freshness and suppressing browning of peeling garlic |
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