Influence of salt concentration on swelling states of poly(sulfobetaine) brush at aqueous solution interface

Yuki Terayama, Moriya Kikuchi, Motoyasu Kobayashi, Masahiro Hino, Atsushi Takahara

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Swelling states of poly(3-dimethyl(methacryloyloxyethyl)ammonium propane sulfonate) (DMAPS) brush in aqueous solutions with different salt concentrations were investigated by atomic force microscopy (AFM) and neutron reflectivity measurement. The thickness of swollen poly(DMAPS) brush evaluated by AFM was increased from 212 nm up to 352 nm with an increase in salt concentration from 0 to 0.5 M. Poly(DMAPS) brush chains formed shrunk structure in a pure water due to the attractive electrostatic inter- and intra-chain interaction of sulfobetaine groups, while the brush chains in NaCl aqueous solution were stretched up because the hydrated salt ions screened the attractive interaction.

Original languageEnglish
Article number012011
JournalJournal of Physics: Conference Series
Volume184
DOIs
Publication statusPublished - Jan 1 2009

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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