Utsunomiya University Department of Applied Chemistry, Faculty of Engineering
Utsunomiya University Department of Applied Chemistry, Faculty of Engineering
Utsunomiya University Department of Applied Chemistry, Faculty of Engineering
Utsunomiya University Department of Applied Chemistry, Faculty of Engineering
Utsunomiya University Department of Applied Chemistry, Faculty of Engineering
出版者
宇宙航空研究開発機構宇宙科学研究本部
出版者（英）
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)
雑誌名
宇宙利用シンポジウム 第20回 平成15年度
雑誌名(英)
Space Utilization Research: Proceedings of the Twentieth Space Utilization Symposium
ページ
242 - 245
発行年
2004-03
抄録（英）
The final goal of the present investigation is the preparation of a high efficiency heat transfer surface for vapor condensation. In this work, a new method has been developed for preparation of thiol self-assembled monolayers (SAMs) covered copper surface with wettability gradient, which is the painting alcohol solutions of hydrophobic perfluoroalkylthiols and hydrophilic mercaptoalcohols on the electrochemically reduced oxide-free varying copper surface. The wettability gradient of the surface could be manipulated in a wide range with a Wenzel equation. The results of vapor condensation experiments were shown that numerous liquid droplets nucleate and grow by coalescence with surrounding drops, then the droplet rapidly moved from the perfluoroalkylthiol SAMs covered hydrophobic side to the mercaptoalcohols SAMs covered hydrophilic side. This phenomenon could be useful for passively enhancing heat transfer including two-phase flow such as heat exchangers and heat pipes.
ぬれ性勾配を有するチオール自己組織化単分子膜被覆銅表面での凝縮液滴の挙動
