Effects of water vapor treatment for the wettability conversion to hydrophobicity on the surface of oxide materials

• Project/Area Number: 24360272
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Inorganic materials/Physical properties
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: NAKAJIMA Akira 東京工業大学, 理工学研究科, 教授 (00302795)
• Co-Investigator(Kenkyū-buntansha): MATSUSHITA Sachiko 東京工業大学, 大学院理工学研究科, 准教授 (50342835) ; ISOBE Toshihiro 東京工業大学, 大学院理工学研究科, 助教 (20518287) ; 松下 祥子 東京工業大学, 理工学研究科, 准教授 (50342853)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000); Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000); Fiscal Year 2013: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000); Fiscal Year 2012: ¥12,870,000 (Direct Cost: ¥9,900,000、Indirect Cost: ¥2,970,000)
• Keywords: 撥水 / 濡れ / 水 / 表面 / 水蒸気 / 酸化物 / シロキサン

Outline of Final Research Achievements

Effects of water vapor treatment (WVT) on the oxide surface for the wettability conversion to hydrophobicity was investigated. Experimental results revealed that this treatment deteriorates bondings of oxide surface with forming adsorption sites such as OH groups for various hydrophobic agents with OH and COOH groups. The effectiveness of this treatment depends on both oxide materials and the surface modifiers. Comparative study between WVT and vacuum-UV illumination suggested that the WVT is more effective to rough oxide surface or oxide porous materials than vacuum-UV illumination. The hydrophobic porous glass prepared through this treatment became a superhydrophobic material and exhibited excellent static and dynamic hydrophobicity.

Research Products

• [Journal Article] Adhesion and friction force on various smooth hydrophobic silane coatings (2015)
  • Author(s): Miyamoto, M. Sakai, T. Isobe, S. Matsushita, A. Nakajima
  • Journal Title: Chem. Lett. Volume: 44 Issue: 5 Pages: 683-684
  • DOI: 10.1246/cl.150018
  • NAID: 130005067953
  • Peer Reviewed
• [Journal Article] Comparative study of the impact and sliding behavior of water droplets on two different hydrophobic silane coatings (2014)
  • Author(s): A. Nakajima, T. Miyamoto, M. Sakai, T. Isobe, S. Matsushita
  • Journal Title: Appl. Surf. Sci. Volume: 292 Pages: 990-996
  • DOI: 10.1016/j.apsusc.2013.12.097
  • Peer Reviewed
• [Journal Article] Sliding of Water Droplets on Smooth Hydrophobic Silane Coatings with Regular Triangle Hydrophilic Regions (2013)
  • Author(s): A. Nakajima, Y. Nakagawa, T. Furuta, M. Sakai, T. Isobe, S. Matsushita
  • Journal Title: Langmuir Volume: 29 Issue: 29 Pages: 9269-9275
  • DOI: 10.1021/la401517v
  • Peer Reviewed
• [Presentation] 親水性・撥水性の表面科学～超親水・超撥水表面の作製と応用～ (2015)
  • Author(s): 中島章
  • Organizer: 平成27年度日本真空学会1月研究例会、日本表面科学会第84回表面科学研究会
  • Place of Presentation: 機械振興会館（東京都）
  • Year and Date: 2015-01-23
  • Invited
• [Presentation] 規則的な親水部位を持つ平滑撥水性シランコーティングの静的/動的撥水性 (2013)
  • Author(s): 中川洋亮、酒井宗寿、磯部敏宏、松下祥子、中島章
  • Organizer: 第51回セラミックス基礎科学討論会
  • Place of Presentation: 仙台国際センター
  • Year and Date: 2013-01-09
• [Presentation] 各種平滑シランコーティングの作製とその動的撥水性 (2013)
  • Author(s): 宮本拓実、酒井宗寿、磯部敏宏、松下祥子、中島章
  • Organizer: 第51回セラミックス基礎科学討論会
  • Place of Presentation: 仙台国際センター
  • Year and Date: 2013-01-09
• [Presentation] Sliding Behavior of Water Droplets on various Hydrophobic Silane Coatings (2012)
  • Author(s): 中島章
  • Organizer: The 5th Thailand-Japan International Academic Conference (TJIA5)
  • Place of Presentation: 東京工業大学(招待講演)
  • Year and Date: 2012-10-20
• [Presentation] 微小液滴を用いた固体表面の濡れ性の評価 (2012)
  • Author(s): 中島章
  • Organizer: 2012年度セラミックス総合研究会
  • Place of Presentation: 山形市蔵王体育館会議室
  • Year and Date: 2012-10-12
• [Book] 化学の要点シリーズ12「固体表面の濡れ性～超親水性から超撥水性まで～」 (2014)
  • Author(s): 中島章
  • Total Pages: 129
  • Publisher: 共立出版