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Wetting Behaviors of an Underwater Oil Droplet on StructuredSurfaces

Published online by Cambridge University Press:  01 March 2016

Shuai Chen ,
Jiadao Wang  and
Darong Chen
Shuai Chen*
Affiliation:
State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
Jiadao Wang
Affiliation:
State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
Darong Chen
Affiliation:
State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
*
*(Email: [email protected])
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Abstract

In this study, the wetting behaviors of an underwater oil droplet on structuredsurfaces were investigated using molecular dynamics simulations and experiments.The wetting states and contact angles of the underwater oil droplet on differenthydrophobic surfaces were simulated. The simulation results showed that therewere three kinds of equilibrium states on the pillar surfaces: the Wenzel,cross, and Cassie states. Moreover, the equilibrium state of the underwater oildroplet transformed from a Wenzel to Cassie state when the water contact angledecreased. The contact angle of the underwater oil droplet increased as thewater contact angle decreased. Furthermore, the wetting behaviors of theunderwater oil droplet on rough polytetrafluoroethylene and silicon surfaceswere studied in experiments. The experimental results also indicated that thecontact angle of the underwater oil droplet increased as the water contact angledecreased, which corresponded well with the simulation results.

Keywords

waterwaste managementadsorption
Type
Articles
Information
MRS Advances , Volume 1 , Issue 10: Biomaterials and Soft Materials , 2016 , pp. 667 - 673
Copyright
Copyright © Materials Research Society 2016 

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