Campus Units

Materials Science and Engineering, Ames Laboratory, Apparel, Events and Hospitality Management

Document Type

Article

Publication Version

Published Version

Publication Date

6-15-2020

Journal or Book Title

Materials Horizons

Volume

7

Issue

8

First Page

2047

Last Page

2055

DOI

10.1039/d0mh00589d

Abstract

Amphiphilic Janus particles are mixed with homogeneous binder particles with strong adhesion to create robust hydrophobic coatings through a unique self-stratification process. Intriguingly, Janus particles form a complete and densely packed monolayer with their hydrophobic sides orienting towards air, which effectively increases the water contact angle to ∼130°, while the hydrophilic sides sustain strong adhesion with the coating layer. The coating maintains its high contact angle even after solvent rinsing, whereas conventional coating completely breaks down. Experimental data and preliminary theoretical modeling suggest that the stratification are partially due to the strong adsorption of Janus particles at the water–air interface, although the detailed mechanisms require more thorough investigation. Remarkably, simply adding Janus particles renders a hydrophilic commercial primer coating surface hydrophobic and drastically reduces the surface tackiness. This cost-effective and commercially scalable method offers a convenient way to fabricate advanced structures at the interface and can be broadly applicable to many other colloidal systems.

Comments

This article is published as Li, Yifan, Fei Liu, Shensheng Chen, Ayuna Tsyrenova, Kyle Miller, Emily Olson, Rebecca Mort, Devin Palm, Chunhui Xiang, Xin Yong, and Shan Jiang. "Self-stratification of amphiphilic Janus particles at coating surfaces." Materials Horizons 7, no. 8 (2020): 2047-2055. DOI: 10.1039/d0mh00589d. Posted with permission.

Creative Commons License

Creative Commons Attribution-Noncommercial 3.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial 3.0 License

Copyright Owner

The Royal Society of Chemistry

Language

en

File Format

application/pdf

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