Jump to main content
Jump to site search

Issue 28, 2016
Previous Article Next Article

Understanding the wettability of a hairy surface: effect of hair rigidity and topology

Author affiliations

Abstract

We present a computer simulation study on the wettability of a hairy surface with different topological structures such as single hairs, hair bundles and network structure. Superficially, for end-tethered rigid hairs or flexible hairs, the nonwettability of the substrate should be analyzed in completely different ways. For rigid hairs, the contact angle is dominantly dependent on the top layer density of hairs. A larger top layer density leads to a larger interaction between droplet and surface, as well as a lower contact angle. For flexible hairs, the nonwettability is determined by the typical properties of hairs right below the droplet, e.g., the chemistry of the surface, the topography and strength of the hair bundle/network or nonwetted area below the projection of the droplet. Nevertheless, it is also possible to generalize these aspects into a uniform procedure, which implies an intrinsic consistent mechanism of the dewetting behavior for droplets on such hairy surfaces. Counterintuitively, we also suggest that the surface which can strongly resist the transition to the Wenzel state does not necessarily lead to a large contact angle, especially in a system where the droplet is treated as liquid bulk. This study helps to build up guidelines for the design of nonwetting surface materials.

Graphical abstract: Understanding the wettability of a hairy surface: effect of hair rigidity and topology

Back to tab navigation

Supplementary files

Publication details

The article was received on 10 Apr 2016, accepted on 16 Jun 2016 and first published on 16 Jun 2016


Article type: Paper
DOI: 10.1039/C6CP02376B
Phys. Chem. Chem. Phys., 2016,18, 18767-18775

  •   Request permissions

    Understanding the wettability of a hairy surface: effect of hair rigidity and topology

    H. Pei, H. Liu, Y. Zhu and Z. Lu, Phys. Chem. Chem. Phys., 2016, 18, 18767
    DOI: 10.1039/C6CP02376B

Search articles by author

Spotlight

Advertisements