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Membranes 2012, 2(1), 16-39; doi:10.3390/membranes2010016

Stimuli Responsive Ionogels for Sensing Applications—An Overview

CLARITY—The Centre for Sensor Web Technologies, National Centre for Sensor Research, School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
* Author to whom correspondence should be addressed.
Received: 20 December 2011 / Revised: 23 January 2012 / Accepted: 2 February 2012 / Published: 7 February 2012
(This article belongs to the Special Issue Responsive Polymer Membranes)
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This overview aims to summarize the existing potential of “Ionogels” as a platform to develop stimuli responsive materials. Ionogels are a class of materials that contain an Ionic Liquid (IL) confined within a polymer matrix. Recently defined as “a solid interconnected network spreading throughout a liquid phase”, the ionogel therefore combines the properties of both its solid and liquid components. ILs are low melting salts that exist as liquids composed entirely of cations and anions at or around 100 °C. Important physical properties of these liquids such as viscosity, density, melting point and conductivity can be altered to suit a purpose by choice of the cation/anion. Here we provide an overview to highlight the literature thus far, detailing the encapsulation of IL and responsive materials within these polymeric structures. Exciting applications in the areas of optical and electrochemical sensing, solid state electrolytes and actuating materials shall be discussed.
Keywords: stimuli responsive polymers; ionogels; ionic liquids; hybrid materials; molecular photoswitches; solid state electrolytes stimuli responsive polymers; ionogels; ionic liquids; hybrid materials; molecular photoswitches; solid state electrolytes
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Kavanagh, A.; Byrne, R.; Diamond, D.; Fraser, K.J. Stimuli Responsive Ionogels for Sensing Applications—An Overview. Membranes 2012, 2, 16-39.

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