Modification of cationic nanoclays with ionic liquids

Neung Hyun Kim, Sanjay V. Malhotra, Marino Xanthos

Research output: Contribution to journalArticlepeer-review

127 Scopus citations

Abstract

As part of a broader effort to develop nanoclays functionalized with different heterocyclic aromatic structures for novel applications, preliminary data are reported on the modification of sodium montmorillonite, a cationic clay, with three low molecular weight pyridinium- and imidazolium-based ionic liquids. Commercially available unmodified clay was treated under different conditions with aqueous solutions of three ionic liquids: N-ethyl pyridinium tetrafluoroborate, 1-ethyl 3-methyl imidazolium bromide and 1-hexyl 3-methyl imidazolium chloride. The modified materials were characterized qualitatively and quantitatively by FTIR, TGA, EDX, WXRD and elemental analysis. The data show an overall increase in interlamellar spacing as a result of sodium cation exchange with the cations of the ionic liquids and improved thermal stability vs. commercial nanoclays modified with long chain quaternary ammonium salts. The effects were dependent on the type of the ionic liquid. Data are also reported on the evaluation of the modified clays in the preparation of polypropylene nanocomposites.

Original languageEnglish (US)
Pages (from-to)29-35
Number of pages7
JournalMicroporous and Mesoporous Materials
Volume96
Issue number1-3
DOIs
StatePublished - Nov 26 2006
Externally publishedYes

Keywords

  • Ion exchange
  • Ionic liquids
  • Montmorillonite
  • Nanoclays
  • Nanocomposite

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials

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