A Dynamic Interface Based on Segregation of an Amphiphilic Hyperbranched Polymer Containing Fluoroalkyl and Oligo(ethylene oxide) Moieties
2020
An amphiphilic hyperbranched
polymer (HBP) containing both fluoroalkyl
(Rf: −C6F13) pendants and
oligo(ethylene oxide) (nEO) parts was synthesized
as a novel type of interfacial modifier to confer dynamic features
on conventional polymer films. The HBP was always segregated at the
outermost region of the polymer matrix in contact with air and water
phases. The former and latter were driven by the presence of hydrophobic
Rf pendants and hydrophilic nEO parts,
respectively. Such a dynamic interface can be attained by changing
the local conformation of HBP or segment-level segregation in the
HBP molecule. In water, nEO parts formed a dissolved
layer at the interface and induced excellent bioinert properties.
Our strategy based on stable segregation, which could be maintained
even after changing the environment, should be useful for constructing
functional surfaces.
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