Loading and release of methyl orange in layer-by-layer assembled polyelectrolyte films

Hiroshi Sato, Rikumi Okuda, Ayami Sugiyama, Mayumi Hamatsu, Jun ichi Anzai

研究成果: Article査読

16 被引用数 (Scopus)

抄録

The loading of methyl orange (MO) in layer-by-layer assembled thin films composed of poly(allylamine hydrochloride) (PAH) and poly(vinyl sulfate) (PVS) or poly(styrenesulfonate) (PSS) and its release from the films were studied. Anionic dye MO can be bound to the PAH-PVS and PAH-PSS films through electrostatic force of attraction. MO fully formed aggregates in the PAH-PVS films, while both monomeric and aggregated forms of MO were found in the PAH-PSS films. The loaded MO can be released from the films into buffer solutions. The release profiles significantly depended on pH and ionic strength of the medium in which MO was released. The release rate was faster in the basic solution than in neutral and acidic media. The release was accelerated in the media with higher ionic strength due to shielding of ionic interactions between MO and positive binding sites in the films.

本文言語English
ページ(範囲)1057-1060
ページ数4
ジャーナルMaterials Science and Engineering C
29
3
DOI
出版ステータスPublished - 2009 4 30

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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