Hydration State Variation of Polyzwitterion Brushes through Interplay with Ions

Langmuir : the ACS Journal of Surfaces and Colloids
Yuji HigakiAtsushi Takahara

Abstract

Polyzwitterions have emerged as a new class of antifouling materials alternating poly(ethylene glycol). The exemplary biopassivation and lubrication behaviors are often attributed to the particular chemical structure of zwitterions, which involve a large dipole moment of the charged groups and a neutral net charge, while the hydration state and dynamics also associate with these characteristics. Polymer brushes composed of surface-tethered polyzwitterion chains produced by surface-initiated controlled radical polymerization have been developed as thin films which exhibit excellent antifouling and lubrication properties. In past decades, numerous studies have been devoted to examining the structure and dynamics of polyzwitterion brush chains in aqueous solutions. This feature article provides an overview of recent studies exploring the hydration state of polyzwitterion brushes with specular neutron reflectivity, highlights some newly published work on the nonuniform equilibrium structure, ion concentration dependence, ion specificity, and the effects of charge spacer length in the zwitterions, and discusses future perspective in this field.

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Citations

Jun 23, 2021·Macromolecular Bioscience·Chie KojimaAkikazu Matsumoto
Sep 10, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Daiki IharaAtsushi Takahara

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