刘明
仿生功能表面的液滴高效转移 Bioinspired surfaces with the function of efficiently transferring droplets
报告人:刘明
所在单位:北京理工大学
个人简介：
刘明，北京理工大学博士后，2020年毕业于北京理工大学力学专业，同年9月加入北京理工大学从事博士后研究。主要从事仿生功能表面的设计与制备、表/界面力学方面的研究。目前主持国家自然科学基金青年基金和中国博士后科学基金面上项目。作为第一作者在国内外Chem. Eng. J、ACS Appl. Mater. Inter.、J Phys. Chem. C、J Phys. Chem. B、Appl. Math., Mech.等期刊发表论文11篇，作为第一发明人申请/授权国家发明专利6项。
报告摘要：
Natural creatures complement structure and function, showing the excellent function of droplet transferring, such as spider silk and desert beetle’s back, which are closely related to the surface wetting property. Bionic design and characterization of functional surfaces are helpful for efficiently transfer and precisely manipulation of droplets, which should be useful in the field of microfluidic control, targeted therapy and heat dissipation of micro/nano devices.
Inspired by the surface wettability of the natural creatures, a kind of bioinspired surfaces capable of efficiently transferring droplets is successfully designed and fabricated in this work. Firstly, the dynamic behavior of droplets transferring on the surface with wettability gradient is studied theoretically and experimentally, and the dynamic morphology is accurately characterized. Secondly, biomimetic surfaces with shape patterned and movable wettability gradient are prepared based on the lubrication effect of Nepenthes pitcher plants, on which the spreading and transferring of droplets along arbitrary path are achieved. Finally, to reduce resource pollution caused by the direct contact between the droplet and the surface, a magnetically multi-level surface is fabricated by imitating the high adhesion state of rose petals and superhydrophobic property of lotus leaves. Such a surface can be used as a “mechanical hand” for transferring droplets without residue or direct contact or transport distance limitation.
