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Process for producing micropillar structure

外国特許コード F110005725
整理番号 Y0354WO
掲載日 2011年9月12日
出願国 アメリカ合衆国
出願番号 53658903
公報番号 20060097361
公報番号 7799378
出願日 平成15年11月27日(2003.11.27)
公報発行日 平成18年5月11日(2006.5.11)
公報発行日 平成22年9月21日(2010.9.21)
国際出願番号 JP2003015171
国際公開番号 WO2004048064
国際出願日 平成15年11月27日(2003.11.27)
国際公開日 平成16年6月10日(2004.6.10)
優先権データ
  • 特願2002-344513 (2002.11.27) JP
  • 特願2003-356881 (2003.10.16) JP
  • 2003WO-JP15171 (2003.11.27) WO
発明の名称 (英語) Process for producing micropillar structure
発明の概要(英語) (US7799378)
A solution having a polymer dissolved in a hydrophobic organic solvent is cast on a substrate, said organic solvent is evaporated in a moist atmosphere to condense moisture contained in an atmosphere prevailing on a surface of said cast solution into micro-droplets, said micro-droplets are dispersed on the surface of said cast solution or in said cast solution into a close-packed structure, said micro-droplets, condensed and dispersed on the surface of said cast solution or in said cast solution, are evaporated to obtain a porous honeycomb structure with said droplets used as casts, and said porous honeycomb structure is at least bisected by peeling in a thickness direction, thereby obtaining honeycomb structures wherein micro-pillars or anisotropic micro-pillars are regularly formed and arranged by said bisection on the peeled sections.
特許請求の範囲(英語) [claim1]
1. A process for preparing a micro-pillar structure, characterized in that a solution having a polymer dissolved in a hydrophobic organic solvent is cast on a substrate, said organic solvent is evaporated in a moist atmosphere of relative humidity of 50% or higher to condense moisture contained in an atmosphere prevailing on a surface of said cast solution into micro-droplets, said micro-droplets are dispersed on the surface of said cast solution or in said cast solution into a packed structure, said micro-droplets, condensed and dispersed on the surface of said cast solution or in said cast solution, are evaporated to obtain a porous honeycomb structure with said droplets used as casts, and said porous honeycomb structure is at least bisected by peeling in a thickness direction, thereby obtaining honeycomb structures wherein micro-pillars are regularly formed and arranged by said bisection on peeled sections, characterized in that said polymer is composed of a hydrophobic or biodegradable polymer and an amphipathic polymer and, optionally, a modifier is incorporated therein, and said hydrophobic polymer comprises a polymer having a polystyrene basic skeleton and said biodegradable polymer comprises a polymer having a poly(meth)acrylate basic skeleton.
[claim2]
2. A process for preparing a micro-pillar structure according to claim 1, wherein said polymer comprises 50 to 99% of said hydrophobic polymer or said biodegradable polymer with the rest being an amphiphilic polymer.
[claim3]
3. A process for preparing a micro-pillar structure according to claim 1, wherein said moist atmosphere is adjusted to a relative humidity of 50 to 95%.
[claim4]
4. A process for preparing a micro-pillar structure according to claim 1 or 3, characterized in that said atmosphere is an ordinary air atmosphere.
[claim5]
5. A process for preparing a micro-pillar structure according to claim 1, characterized in that operation for evaporation of said organic solvent in said moist atmosphere is carried out by blowing an atmosphere having a high humidity onto an evaporation interface of said organic solvent.
[claim6]
6. A process for preparing a micro-pillar structure according to claim 1, characterized in that peeling operation is carried out by use of an adhesive tape.
[claim7]
7. A process for preparing a micro-pillar structure according to any one of claims 1, 3, 5 and 6, characterized in that said micro-pillars are arranged at a length of 0.1 to 50 mu m, a tip length of 0.01 to 20 mu m and a spacing of 0.1 to 100 mu m.
[claim8]
8. A process for preparing a micro-pillar structure according to any one of claims 1, 3, 5 and 6, above, wherein said micro-pillars are oriented in an direction except for a vertical direction and set with anisotropy.
[claim9]
9. A process for preparing a micro-pillar structure according to claim 8, characterized in that said anisotropic micro-pillars are obtained by a peeling treatment with transverse shearing stress in such a way that when the porous honeycomb structure that is a micro-pillar precursor is sectioned by peeling in the thickness direction, the resulting micro-pillars are oriented in any direction except for the vertical direction.
  • 発明者/出願人(英語)
  • TANAKA MASARU
  • SHIMOMURA MASATSUGU
  • TAKEBAYASHI MASAFUMI
  • YABU HIROSHI
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
国際特許分類(IPC)
米国特許分類/主・副
  • 427/271
  • 427/335
  • 427/355
  • 427/377
  • 427/407.1
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