Issue 11, 2014

Thermoresponsive polymerized gemini dicationic ionic liquid


A new type of gemini poly(ionic liquid), poly[(1,8-octanediyl-bis(tri-n-butylphosphonium) 4-styrene sulfonate], was synthesized via the free radical polymerization of a dicationic ionic liquid monomer in DMF. This poly(ionic liquid) presented a lower critical solution temperature (LCST)-type phase transition in aqueous solution. Unusually this phase transition can be observed even at a concentration as low as 0.1 wt%. Additionally, the type and concentration of external salt can influence the cloud point. Copolymerisation of this gemini dicationic ionic liquid monomer with divinylbenzene crosslinker in water led to the formation of a hydrogel, which exhibited a temperature-triggered volume change in water.

Graphical abstract: Thermoresponsive polymerized gemini dicationic ionic liquid

Article information

Article type
31 Dec 2013
08 Feb 2014
First published
10 Feb 2014
This article is Open Access
Creative Commons BY license

Polym. Chem., 2014,5, 3719-3724

Thermoresponsive polymerized gemini dicationic ionic liquid

Y. Men, H. Schlaad, A. Voelkel and J. Yuan, Polym. Chem., 2014, 5, 3719 DOI: 10.1039/C3PY01790G

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