https://scholars.lib.ntu.edu.tw/handle/123456789/631399
標題: | Total Liquid Transfer with Enhanced Contact Line Slippage | 作者: | Lu, Hsuan Chin You, Jhu Lin YING-CHIH LIAO |
關鍵字: | ONE SOLID-SURFACE; SLIPPERY SURFACES; DROPLET; SIMULATION; MECHANISM; BREAKUP; BRIDGE | 公開日期: | 22-十一月-2022 | 出版社: | AMER CHEMICAL SOC | 卷: | 38 | 期: | 46 | 起(迄)頁: | 14238 | 來源出版物: | Langmuir | 摘要: | A new surface treatment method is developed to achieve total liquid transfer. The transfer process of a liquid droplet is recorded through high-speed photography and analyzed via image analysis to investigate the hydrodynamic interactions. For a pristine PMMA surface, a viscous and viscoelastic liquid facilitates transfer by increased viscous and inertial forces and delayed liquid bridge breakage but is limited by slow contact line slippage. Hydrophobic surface treatments can increase contact line slippage and the receding angle to achieve transfer ratios up to 98%. However, pinning and contact angle hysteresis from surface roughness features limit liquid transfer, especially for smaller droplets and higher separation velocities. A lubricant-infused surface treatment with PDMS and a thin layer of less viscous silicone oil provides a smooth, homogeneous surface with fast slippage, low contact angle hysteresis, and only a slight oil wetting ridge. Liquid could then transfer at high ratios (∼99.9%), regardless of droplet size and separation velocity. Finally, complete transfer liquid from indented cells is demonstrated to show the potential of this surface modification method for gravure printing. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/631399 | ISSN: | 07437463 | DOI: | 10.1021/acs.langmuir.2c02238 |
顯示於: | 化學工程學系 |
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