Origin of Underwater Oil‐Repellence in Polyelectrolyte Brush Surfaces

Origin of Underwater Oil‐Repellence in Polyelectrolyte Brush Surfaces
Title:
Origin of Underwater Oil‐Repellence in Polyelectrolyte Brush Surfaces
Other Titles:
Advanced Materials Interfaces
Publication Date:
28 September 2020
Citation:
Daniel, D., Goh, S. S., Truong, T. N. B., Koh, X. Q., & Tomczak, N. (2020). Origin of Underwater Oil‐Repellence in Polyelectrolyte Brush Surfaces. Advanced Materials Interfaces, 8(2), 2001203. doi:10.1002/admi.202001203
Abstract:
When submerged under water, polyelectrolyte brush surfaces become highly oil-repellent. This is due to the ability of the charged moieties on the polymer backbone to retain strong hydration shells. Despite their technological relevance, there is no rational design principle for optimizing the oil-repellent performance of hydrophilic polyelectrolyte brushes. Using droplet probe Atomic Force Microscopy (AFM), we measured the interaction forces between an oil droplet and different polyelectrolyte brushes. We show that surfaces are most repellent when there are repulsive electric double-layer forces that can stabilize a continuous water film beneath the oil droplet. Once a stable hydration layer forms, the oil-repellent performance is not affected by the polymer brush characteristics, such as its thickness and swelling ratio.
License type:
Publisher Copyright
Funding Info:
This research / project is supported by the A*STAR - Pharos Advanced Surfaces Program
Grant Reference no. : 1523700101
Description:
"This is the peer reviewed version of the following article: [Daniel, D., Goh, S. S., Truong, T. N. B., Koh, X. Q., & Tomczak, N. (2020). Origin of Underwater Oil‐Repellence in Polyelectrolyte Brush Surfaces. Advanced Materials Interfaces, 8(2), 2001203. ], which has been published in final form at [doi:10.1002/admi.202001203]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions."
ISSN:
2196-7350
2196-7350
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