Next Article in Journal
On-Chip Facile Preparation of Monodisperse Resorcinol Formaldehyde (RF) Resin Microspheres
Next Article in Special Issue
Pair Interaction of Catalytical Sphere Dimers in Chemically Active Media
Previous Article in Journal
Analysis of Correlation in MEMS Gyroscope Array and its Influence on Accuracy Improvement for the Combined Angular Rate Signal
Previous Article in Special Issue
Controllable Swarming and Assembly of Micro/Nanomachines
Open AccessFeature PaperArticle

Hydrophobic Janus Foam Motors: Self-Propulsion and On-The-Fly Oil Absorption

State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
Authors to whom correspondence should be addressed.
Micromachines 2018, 9(1), 23;
Received: 21 December 2017 / Revised: 7 January 2018 / Accepted: 9 January 2018 / Published: 11 January 2018
In this work, we for the first time have proposed and fabricated a self-propelled Janus foam motor for on-the-fly oil absorption on water by simply loading camphor/stearic acid (SA) mixture as fuels into one end of the SA-modified polyvinyl alcohol (PVA) foam. The as-fabricated Janus foam motors show an efficient Marangoni effect-based self-propulsion on water for a long lifetime due to the effective inhibition of the rapid release of camphor by the hydrophobic SA in the fuel mixture. Furthermore, they can automatically search, capture, and absorb oil droplets on the fly, and then be spontaneously self-assembled after oil absorption due to the self-propulsion of the motors as well as the attractive capillary interactions between the motors and oil droplets. This facilitates the subsequent collection of the motors from water after the treatment. Since the as-developed Janus foam motors can effectively integrate intriguing behaviors of the self-propulsion, efficient oil capture, and spontaneous self-assembly, they hold great promise for practical applications in water treatment. View Full-Text
Keywords: self-propulsion; oil/water separation; foam; capillary interaction; Marangoni effect self-propulsion; oil/water separation; foam; capillary interaction; Marangoni effect
Show Figures

Graphical abstract

MDPI and ACS Style

Li, X.; Mou, F.; Guo, J.; Deng, Z.; Chen, C.; Xu, L.; Luo, M.; Guan, J. Hydrophobic Janus Foam Motors: Self-Propulsion and On-The-Fly Oil Absorption. Micromachines 2018, 9, 23.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Search more from Scilit
Back to TopTop