Okada Kenji, Miura Yoko, Chiya Tomoya, Tokudome Yasuaki, Takahashi Masahide
Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University Sakai Osaka 599-8531 Japan
JST, PRESTO 4-1-8 Honcho Kawaguchi Saitama 332-0012 Japan.
RSC Adv. 2020 Jul 28;10(47):28032-28036. doi: 10.1039/d0ra05471b. eCollection 2020 Jul 27.
A novel approach for thermo-responsive wettability has been accomplished by surface roughness change induced by thermal expansion of paraffin coated on titanate nanostructures. The surface exhibits thermo-responsive and reversible wettability change in a hydrophobic regime; the surface shows superhydrophobicity with contact angles of ∼157° below 50 °C and ∼118° above 50 °C due to a decrease of surface roughness caused by thermally-expanded paraffin at higher temperatures. Reversible wettability change of ∼40° of a contact angle allows for fast and multi-directional droplet transport. The present approach affords a versatile selection of materials and wide variety of contact angles, promoting both scientific advancement and technology innovation in the field of smart surfaces.
通过涂覆在钛酸盐纳米结构上的石蜡热膨胀引起的表面粗糙度变化，实现了一种用于热响应润湿性的新方法。该表面在疏水状态下表现出热响应和可逆的润湿性变化；由于高温下热膨胀的石蜡导致表面粗糙度降低，该表面在50℃以下具有约157°的接触角，表现出超疏水性，在50℃以上具有约118°的接触角。约40°接触角的可逆润湿性变化允许快速和多方向的液滴传输。本方法提供了多种材料选择和广泛的接触角范围，促进了智能表面领域的科学进步和技术创新。
