Mesomorphic solid-like structures of sulfated extra-cellular polysaccharide-CnTAB compounds

N. Hedin, O. Regev, I. Furó

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Complexes formed by a partially sulfated polysaccharide (from the unicellular micro alga Porphyridium sp.) and surfactant homologues of alkyltrimethylammonium bromide were investigated using various techniques, such as small and wide angle X-ray scattering, optical phase interference microscopy and 2H nuclear magnetic resonance (NMR). The scattering data suggest an average regular ordering at both microscopic and mesoscopic length scales, the second of which varies with the surfactant tail length. The 2H NMR spectrum, however, reveals a large variation of structural features around this average. The dynamics of the surfactant molecules, inferred from the NMR spectrum and relaxation times, resemble those found in crystalline surfactant phases. Transparent self-standing 'biofilms' were also processed from the complex; the microstructure seems to be largely invariant whether the complex is in powder or in film form.

Original languageEnglish
Pages (from-to)140-145
Number of pages6
JournalProgress in Colloid and Polymer Science
Volume112
DOIs
StatePublished - 1 Jan 1999

Keywords

  • Alkyltrimethylammonium bromide
  • Nuclear magnetic resonance
  • Small angle X-ray scattering
  • Sulfated polysaccharide
  • Wide angle X-ray scattering

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