Bi-layer formation of imidazole-modified ethyl(hydroxyethyl)cellulose at a hydrophobic surface as monitored by QCM-D

Jesper Hedin*, Dan Isaksson, Markus Andersson, Magnus Nydén

*Corresponding author for this work

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The adsorption behaviour of ethyl(hydroxyethyl)cellulose chemically modified with imidazole (Im-EHEC) at hydrophobic surfaces has been studied with QCM-D. The very slow adsorption isotherm was due to a continuous polymer film reconfiguration and exchange of different sized polymers. The thickness of the film was about 30 nm. The polymers adsorbed Cu2+ ions into the film from a CuCl2 solution and a bi-layer was formed when Im-EHEC was added a second time. The second polymer film was only 7 nm thick but highly viscoelastic. After rinsing with water the metal ions was flushed away and the second Im-EHEC layer was released. The imidazole modification of EHEC enables interaction with transition metal ions and opens up for new applications for cellulose based materials.

Original languageEnglish
Pages (from-to)388-392
Number of pages5
JournalJournal of Colloid and Interface Science
Volume336
Issue number2
DOIs
Publication statusPublished - 15 Aug 2009
Externally publishedYes

Keywords

  • EHEC
  • Imidazole
  • QCM-D
  • Bi-layer
  • Cellulose derivative

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