EP2594343B1 - Hydrophobes Material - Google Patents

Hydrophobes Material Download PDF

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Publication number
EP2594343B1
EP2594343B1 EP12192414.6A EP12192414A EP2594343B1 EP 2594343 B1 EP2594343 B1 EP 2594343B1 EP 12192414 A EP12192414 A EP 12192414A EP 2594343 B1 EP2594343 B1 EP 2594343B1
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EP
European Patent Office
Prior art keywords
substrate
fine uneven
hydrophobic
petal
hydrophobic molecule
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
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EP12192414.6A
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English (en)
French (fr)
Other versions
EP2594343A3 (de
EP2594343A2 (de
Inventor
Riichiro Ohta
Tomoyuki Koga
Takeshi Ohwaki
Atsuto Okamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Central R&D Labs Inc
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Toyota Central R&D Labs Inc
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Publication of EP2594343A3 publication Critical patent/EP2594343A3/de
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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
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/10—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by other chemical means
    • B05D3/102—Pretreatment of metallic substrates
    • 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
    • B05D2350/00—Pretreatment of the substrate
    • B05D2350/60—Adding a layer before coating
    • B05D2350/63—Adding a layer before coating ceramic layer

Definitions

  • the petal-like structure is formed of boehmite and the columnar structure is formed of bayerite.
  • hydrophobic molecule molecules including a fluoroalkyl group (Rf) and molecules including a hydrocarbon group are known.
  • the hydrophobicity of a hydrophobic molecule including Rf is higher than that of a hydrophobic molecule including a hydrocarbon group.
  • the hydrophobic molecule including Rf has high hydrophobicity as the number of carbons in Rf increases.
  • examples of the polar functional group (B) include:
  • a third specific example is a molecule including an Rf having 8 carbon atoms or more (hereinafter referred to as "hydrophobic molecule (c)”) as a hydrophobic molecule including a silanol-based functional group.
  • boehmite and bayerite are known to be formed during hydro-thermal sealing of an anodic oxidation coating film.
  • boehmite is formed by treatment at about 80°C or higher, while bayerite is formed by treatment at about 80°C or lower.
  • a pattern including two regions of a region in which a nickel catalyst is present on a silicon substrate and the other region in which the surface of the silicon substrate is exposed is formed.
  • the method of covering the hydrophobic molecule is not particularly limited, and various methods may be used.
  • the covering with the hydrophobic molecule is performed by dissolving the hydrophobic molecule in a suitable solvent to prepare a solution, coating the solution on the surface of the fine uneven structure, and volatilizing the solvent.
  • a coating film of the hydrophobic molecule may be formed on the surface of the fine uneven structure.
  • the coating method of the solution include coating by a brush, dipping, spin coat, sink and the like.
  • the heating temperature is preferably 50°C or more.
  • FIG. 1(a) illustrates a schematic cross-sectional view of a hydrophobic material in the related art.
  • FIG. 1(b) illustrates a schematic cross-sectional view of a hydrophobic material according to the present invention.
  • the surface of the substrate is subjected to predetermined treatment, it is possible to form a fine uneven structure including a fine (for example, a size of nanometer) petal-like structure and a coarse (for example, a size from submicron to micron) columnar structure, as illustrated in FIG. 1(b) .
  • a fine uneven structure including a fine (for example, a size of nanometer) petal-like structure and a coarse (for example, a size from submicron to micron) columnar structure, as illustrated in FIG. 1(b) .
  • the surface of the fine uneven structure is coated with a hydrophobic molecule, the surface of the substrate exhibits super hydrophobicity.
  • the hydrophobic material including the fine uneven structure exhibits excellent super hydrophobicity, compared to a hydrophobic material in the related art including only a petal-like structure.
  • Water droplets on the surface of the substrate are ideally supported in the vicinity of the vertex of the coarse columnar structure, as illustrated in FIG. 1(b) , and thus the distance from the valley of the petal-like structure to the water droplet becomes elongated. That is, water droplets on the surface of the substrate, which are hydrophobic and have a fine uneven structure, are brought into contact with the projections of the fine uneven structure in terms of the microscopic scale, and an air layer is formed between the projections.
  • the smaller the contact area between water droplets and the projections becomes that is, the larger the area of the interface between the air layer formed between the projections and water droplets becomes , the larger the contact angle with water droplets becomes .
  • a combination of the columnar structure and the petal-like structure also has excellent super hydrophobicity against these large water droplets, compared to the structural body formed only of the petal-like structure due to effects of expanding the area of the interface between the air layer/the water droplets by the above-described columnar structure.
  • a fine uneven structure When a fine uneven structure is prepared with only water, only a petal-like structure is formed, as illustrated in FIG. 6 . Meanwhile, when a fine uneven structure is prepared with a triethylamine aqueous solution, a coarse columnar structure is grown along with a petal-like structure, as illustrated in FIG. 4 . Some of the coarse columnar structures are grown vertically to the substrate plane and some are obliquely inclined or are also lying on the substrate plane, and thus the growth direction thereof is random.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Laminated Bodies (AREA)
  • Materials For Medical Uses (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Claims (5)

  1. Hydrophobes Material, umfassend die folgenden Anordnungen:
    (1) das hydrophobe Material mit:
    einem Substrat,
    einer feinen unebenen Struktur, die auf einer Oberfläche des Substrats gebildet ist; und
    einem hydrophoben Molekül, das eine Oberfläche der feinen unebenen Struktur bedeckt, und
    (2) die feine unebene Struktur mit:
    einer blütenblattartige Struktur, die aus einem Aggregat einer Mehrzahl von plattenartigen Teilchen gebildet ist; und
    einer säulenförmigen Struktur, die aus säulenförmigen Teilchen gebildet ist,
    wobei eine Länge von der Oberfläche des Substrats zu einer Spitze der säulenförmigen Struktur länger ist als eine Länge von der Oberfläche des Substrats zu einer Spitze der blütenblattartigen Struktur,
    wobei die blütenblattartige Struktur eine Struktur ist, in welcher feine plattenartige Teilchen, die eine Dicke in der Größenordnung von Nanometern aufweisen, wie Blütenblätter dicht gepackt sind, und
    wobei die blütenblattartige Struktur in einem Bereich gebildet ist, in dem zumindest die säulenförmige Struktur nicht in der Oberfläche der Struktur gebildet ist.
  2. Hydrophobes Material nach Anspruch 1,
    wobei die feine unebene Struktur aus einem Metalloxid oder einem Material, das eine polare funktionelle Gruppe (A) zumindest auf dessen Oberfläche aufweist, gebildet ist,
    das hydrophobe Molekül eine polare funktionelle Gruppe (B) enthält, welche in der Lage ist, eine chemische Bindung mit der Oberfläche der feinen unebenen Struktur zu bilden, und
    das hydrophobe Material durch Bedecken der Oberfläche der feinen unebenen Struktur mit dem hydrophoben Molekül und Bilden einer chemischen Bindung der Oberfläche der feinen unebenen Struktur mit der polaren funktionellen Gruppe (B) erhalten wird.
  3. Hydrophobes Material nach Anspruch 1,
    wobei die blütenblattartige Struktur aus Böhmit gebildet ist, und
    die säulenförmige Struktur aus Bayerit gebildet ist.
  4. Hydrophobes Material nach Anspruch 1,
    wobei das hydrophobe Molekül ein oder mehrere Moleküle ausgewählt aus der Gruppe von Molekülen enthält, die durch die folgende Formel (a) und Formel (b) dargestellt werden.
    Figure imgb0005
    wobei, R: ein einwertiger Kohlenwasserstoff mit 1 bis 8 Kohlenstoffatomen ist,
    X: -OR (R ist eine Alkylgruppe), -OH oder ein Halogenatom ist,
    l: eine ganze Zahl von 0 oder höher, m: eine ganze Zahl von 1 bis 5, n: eine ganze Zahl von 0 bis 2, und a und b: 2 oder 3 ist, und
    Figure imgb0006
     wobei h: eine ganze Zahl von 1 bis 10 ist.
  5. Hydrophobes Material nach Anspruch 1,
    wobei das Substrat aus einem Aluminium enthaltenden Material gebildet ist.
EP12192414.6A 2011-11-14 2012-11-13 Hydrophobes Material Not-in-force EP2594343B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2011249135A JP5656026B2 (ja) 2011-11-14 2011-11-14 撥水材及びその製造方法

Publications (3)

Publication Number Publication Date
EP2594343A2 EP2594343A2 (de) 2013-05-22
EP2594343A3 EP2594343A3 (de) 2013-09-11
EP2594343B1 true EP2594343B1 (de) 2019-04-17

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EP12192414.6A Not-in-force EP2594343B1 (de) 2011-11-14 2012-11-13 Hydrophobes Material

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JP (1) JP5656026B2 (de)

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JP6206660B2 (ja) * 2013-09-25 2017-10-04 日産自動車株式会社 透明撥水体及びその製造方法
JP6176035B2 (ja) * 2013-09-30 2017-08-09 日産自動車株式会社 微細表面構造体及びその製造方法
WO2016014946A2 (en) 2014-07-25 2016-01-28 University Of Florida Research Foundation, Inc. Superoleophobic alumina coatings
JP2016107530A (ja) * 2014-12-08 2016-06-20 株式会社豊田中央研究所 撥水材及びその製造方法
WO2018147125A1 (ja) * 2017-02-09 2018-08-16 ダイキン工業株式会社 フィンおよび熱交換器
WO2020213485A1 (ja) 2019-04-18 2020-10-22 Dic株式会社 構造体、構造体の製造方法、熱交換機用部材及び熱交換器
WO2021054247A1 (ja) * 2019-09-20 2021-03-25 株式会社山一ハガネ 熱交換器用部材、熱交換器、空気調和機、及び冷蔵庫
JP7427240B2 (ja) 2020-03-30 2024-02-05 学校法人 龍谷大学 表面構造体、およびそれを用いた液滴の回収方法
CN115461498A (zh) 2020-04-28 2022-12-09 Dic株式会社 拒水性铝材和其制造方法

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JP4762945B2 (ja) 2003-08-27 2011-08-31 Ｎｕエコ・エンジニアリング株式会社 カーボンナノウォール構造体
JP2005315142A (ja) 2004-04-28 2005-11-10 Hitachi Koki Co Ltd オイルフリースクロール形真空ポンプ
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EP2594343A3 (de) 2013-09-11
EP2594343A2 (de) 2013-05-22
JP5656026B2 (ja) 2015-01-21

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