Marangoni effect inspired robotic self-propulsion over a water surface using a flow-imbibition-powered microfluidic pump

被引：22

作者：

Kwak, Bokeon ^{[1
]}

Choi, Soyoung ^{[1
]}

Maeng, Jiyeon ^{[1
]}

Bae, Joonbum ^{[1
]}

机构：

[1] Ulsan Natl Inst Sci & Engn UNIST, Dept Mech Engn, Biorobot & Control BiRC, Ulsan 44919, South Korea

来源：

SCIENTIFIC REPORTS | 2021年 / 11卷 / 01期

基金：

新加坡国家研究基金会;

关键词：

DIRECTIONAL MOTION; DRIVEN MOTION; WALKING; BEETLES; DESIGN; SOFT;

D O I：

10.1038/s41598-021-96553-8

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Certain aquatic insects rapidly traverse water by secreting surfactants that exploit the Marangoni effect, inspiring the development of many self-propulsion systems. In this research, to demonstrate a new way of delivering liquid fuel to a water surface for Marangoni propulsion, a microfluidic pump driven by the flow-imbibition by a porous medium was integrated to create a novel self-propelling robot. After triggered by a small magnet, the liquid fuel stored in a microchannel is autonomously transported to an outlet in a mechanically tunable manner. We also comprehensively analyzed the effects of various design parameters on the robot's locomotory behavior. It was shown that the traveled distance, energy density of fuel, operation time, and motion directionality were tunable by adjusting porous media, nozzle diameter, keel-extrusion, and the distance between the nozzle and water surface. The utilization of a microfluidic device in bioinspired robot is expected to bring out new possibilities in future development of self-propulsion system.

引用

页数：13