Synthesis and characterization of ionic polymer networks in a room-temperature ionic liquid

Joseph F. Stanzione, Robert E. Jensen, Philip J. Costanzo, Giuseppe R. Palmese

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24 Scopus citations


Ionic liquid gels (ILGs) for potential use in ion transport and separation applications were generated via a free radical copolymerization of 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) and N,N′- methylene(bis)acrylamide (MBA) using 1-ethyl-3-methylimidazolium ethylsulfate (IL) as a room temperature ionic liquid solvent medium. The AMPS and MBA monomer solubility window in the IL in the temperature range of 25 to 65 °C was determined. In situ ATR-FTIR showed near complete conversion of monomers to a cross-linked polymer network. ILGs with glass transition temperatures (T gs) near -50 °C were generated with Tg decreasing with increasing IL content. The elastic moduli in compression (200 to 6600 kPa) decreased with increasing IL content and increasing AMPS content while the conductivities (0.35 to 2.14 mS cm-1) increased with increasing IL content and decreasing MBA content. The polymer-IL interaction parameter (π) (0.48 to 0.55) was determined via a modified version of the Bray and Merrill equation.

Original languageEnglish (US)
Pages (from-to)6142-6150
Number of pages9
JournalACS Applied Materials and Interfaces
Issue number11
StatePublished - Nov 28 2012
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Materials Science


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