Ion permeability of free-suspended layer-by-layer (LbL) films prepared using an alginate scaffold

Katsuhiko Sato, Takuto Shiba, Jun ichi Anzai

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Layer-by-layer (LbL) films were prepared over an aperture (diameter 1-5 mm) on a glass plate to study ion permeation across free-suspended LbL films. LbL films were prepared by depositing alternating layers of poly(allylamine hydrochloride) (PAH) and poly(styrene sulfonate) (PSS) on the surface of a glass plate with an aperture filled with an alginate gel, followed by dissolution of the alginate gel. PAH-PSS films prepared in this way showed permeability to inorganic salts, depending on the size and charge. Permeability to alkali metal chlorides depended on the Stokes radius of the alkali metal cations. The effect of the type of halide was negligible because of the halides' smaller ionic radii. Permeation of multivalent ions such as Ru(NH3)63+ and [Fe(CN)6]3- was severely suppressed owing to Donnan exclusion.

Original languageEnglish
Pages (from-to)696-705
Number of pages10
JournalPolymers
Volume5
Issue number2
DOIs
Publication statusPublished - 2013

Keywords

  • Donnan exclusion
  • Free-suspended LbL film
  • Ion permeability
  • Layer-by-layer film

ASJC Scopus subject areas

  • Chemistry(all)
  • Polymers and Plastics

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