Condensation dynamics at the solid-liquid interface on micro- and nano-structured surfaces by Total Internal Reflection method

采用全内反射法研究微米和纳米结构表面固液界面的凝聚动力学

• 批准号: 18K13703
• 负责人: オレホン ダニエル
• 金额: $ 2.66万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Early-Career Scientists
• 财政年份: 2018
• 资助国家: 日本
• 起止时间: 2018-04-01 至 2019-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-18K13703/
• 关键词: Total Internal Reflect; Dropwise Condensation; Solid-Liquid Interface; Droplet Deweeting; Droplet Jumping; Wavelength Intensity; Condensate-Surf Interact; Condensate-Oil Interact; TotalInternalReflection; Droplet Dewetting

A new experimental setup combining Total Internal Reflection methodology coupled with optical microscopy was proposed to observe closely the dynamic interactions between condensing drops and solid surfaces. Visualisation setup consisting of a long working distance optical microscope lens Keyence VH-Z50L (spatial resolutions 6.1 x 4.6 mm^2 at 50x, 610 x 460 microns^2 at 500x coupled with a CCD camera (500 frames per seconds) was built.Optical microscopy was applied to image condensation of drops on lubricant infused surfaces LIS. By shifting the plane of view/focus using a micrometer x-y stage the first experimental observations looking directly at the solid-liquid/gas interface were acquired. Observations at the solid-liquid/gas interface reveal the intimate interactions between condensing drops and the solid structures as well as the intimate interactions between the condensing drops and the oil. Observations put forward the lower solid-condensate direct interactions in the case of hierarchical micro-/nano-structured LIS when compared to solely nano-structured LIS. The lower direct drop-solid interactions offer in turn lower adhesion of the condensate to the lubricant infused hierarchical surface inducing the shedding of smaller drops when compared to nano-structured LIS, which is characteristic of high heat transfer.Due to short duration of the grant since the PI moved to a new academic position at The University of Edinburgh, the second part of the setup comprising; laser, sapphire cooling stage, halogen lamps, optical microscopy side view, was not completely finalised.

提出了一种将全内反射法与光学显微镜相结合的新实验装置，以近距离观察冷凝液滴与固体表面之间的动态相互作用。建立了由远工作距离光学显微镜镜头Keyence VH-Z50L（空间分辨率为6.1 x 4.6 mm^2，空间分辨率为610 x 460微米^2，空间分辨率为500倍）和CCD相机（每秒500帧）组成的可视化装置。用光学显微镜观察了液滴在润滑液表面的凝聚现象。通过使用微米x-y级来移动观察/聚焦平面，获得了直接观察固-液/气界面的第一个实验观测结果。在固-液/气界面上的观测揭示了冷凝滴与固体结构之间的密切相互作用以及冷凝滴与油之间的密切相互作用。观察结果表明，与单一的纳米结构LIS相比，分层微/纳米结构LIS的固-凝直接相互作用更低。与纳米结构的液滴相比，较低的直接滴-固相互作用反过来又降低了冷凝液对注入润滑油的分层表面的粘附，从而导致更小的液滴脱落，这是高传热的特点。由于项目负责人到爱丁堡大学担任新的学术职位后，资助持续时间较短，第二部分的设置包括；激光，蓝宝石冷却阶段，卤素灯，光学显微镜侧视图，还没有完全定型。

项目成果

Droplet Growth Kinetics During Dropwise Condensation

滴状冷凝过程中的液滴生长动力学

• 发表时间: 2018
• 作者: J. Carpenter;D. Orejon;S. Yin;S. Chavan;N. Miljkovic
• 通讯作者: N. Miljkovic

Effect of Microstructures on Superhydrophobic and Slippery Lubricant-Infused Porous Surfaces During Condensation Phase-Change

凝聚相变过程中微结构对超疏水和光滑注入润滑剂的多孔表面的影响

• DOI: 10.1115/icnmm2018-7640
• 发表时间: 2018
• 期刊: ASME 2018 16th International Conference on Nanochannels, Microchannels, and Minichannels
• 作者: Orejon Daniel;Maeda Yota;Lv Fengyong;Zhang Peng;Takata Yasuyuki
• 通讯作者: Takata Yasuyuki

Soft Lithography Replication of Bioinspired G. dalenii Surface for Condensation, Fog Harvesting and Microfluidic Applications

用于冷凝、雾气采集和微流体应用的仿生 G. dalenii 表面的软光刻复制

• 发表时间: 2018
• 作者: D. Orejon;V. Sharma;Y. Takata;V. Krishnan;S. Harish
• 通讯作者: S. Harish

. エタノール液滴への周囲水蒸気の吸収・凝縮 / Investigation on water adsorption-absorption and/or condensation onto ethanol evaporating droplets

乙醇蒸发液滴上的水吸附-吸收和/或冷凝的研究

• 发表时间: 2018
• 作者: D. Orejon;Y. Kita;Y. Okauchi;Y. Fukatani;M. Kohno;Y. Takata;K. Sefiane
• 通讯作者: K. Sefiane

Effect of hierarchical structure on slippery lubricant infused porous surfaces

分层结构对光滑润滑剂注入多孔表面的影响

• 发表时间: 2018
• 作者: D. Orejon;Y. Maeda;F.Y. Lv;P. Zhang;Y. Takata
• 通讯作者: Y. Takata