TY - JOUR
T1 - Origin of Underwater Oil-Repellence in Polyelectrolyte Brush Surfaces
AU - Daniel, Dan
AU - Goh, Shermin Simin
AU - Truong, Tran Ngoc Bao
AU - Koh, Xue Qi
AU - Tomczak, Nikodem
N1 - Generated from Scopus record by KAUST IRTS on 2023-02-14
PY - 2021/1/1
Y1 - 2021/1/1
N2 - 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, the interaction forces between an oil droplet and different polyelectrolyte brushes are measured. It is shown 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.
AB - 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, the interaction forces between an oil droplet and different polyelectrolyte brushes are measured. It is shown 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.
UR - https://onlinelibrary.wiley.com/doi/10.1002/admi.202001203
UR - http://www.scopus.com/inward/record.url?scp=85091483771&partnerID=8YFLogxK
U2 - 10.1002/admi.202001203
DO - 10.1002/admi.202001203
M3 - Article
SN - 2196-7350
VL - 8
JO - Advanced Materials Interfaces
JF - Advanced Materials Interfaces
IS - 2
ER -