Ionic liquids as novel solvents for ionic polymer transducers

2004 ◽  
Author(s):  
Matthew D. Bennett ◽  
Donald J. Leo
Keyword(s):  
Ionic Liquids ◽  
Ionic Polymer

Ionic liquids as stable solvents for ionic polymer transducers

2004 ◽  
Vol 115 (1) ◽  
pp. 79-90 ◽  
Author(s):  
Matthew D. Bennett ◽  
Donald J. Leo
Keyword(s):  
Ionic Liquids ◽  
Ionic Polymer

High Conductivity Ionic Liquid- Nafion Mat Composites for High Speed Ionic Polymer Transducers

2005 ◽  
Vol 889 ◽  
Author(s):  
Barbar Akle ◽  
Donald J. Leo ◽  
Changwoon Nah ◽  
Abdul M. Kader
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
High Speed ◽  
High Surface ◽  
High Surface Area ◽  
Ionic Polymer ◽  
Speed Of Response ◽  
Direct Assembly ◽  
Solution Electrospinning ◽  
Exchange Membrane

ABSTRACTIonomeric polymer transducers consist of an ion-exchange membrane plated with conductive metal layers on the outer surfaces. Such materials are known to generate large bending strain (> 9% is possible) at low applied voltages (typically less than 5 V). The main disadvantage of ionomer–ionic liquid transducers is the slow speed of response. The speed of response in such actuators has been correlated to the ionic liquid content and the conductivity of the membrane. To increase the conductivity of the transducers a Nafion™ mat is hydrated with 1-ethyl-3-methylimidazolium trifluoromethanesulfonate (EMI-Tf) ionic liquids and high surface area RuO2 electrodes are attached using the Direct Assembly Process (DAP). The Nafion™ mat is prepared from homogenous solution electrospinning. The solution is prepared by mixing 1 wt % of polyethylene oxide solution in methanol (PEO, Mol. wt 3×106) to 5 wt % Nafion 1100 solution.. The syringe needle is connected to a 15kV power supply and is placed 15cm away from the collecting drum. The measured conductivities of water hydrated Nafion electro-spun fibers are 16.8 mS/cm, which are lower than the nominal 110 mS/cm that of H+ Nafion membranes. The uptake is measured to be around 250 %wt compared to 58 %wt obtained in Nafion films. The ionic conductivity of 110 %wt swollen ionic liquids-Nafion mat composite is computed to be 0.9 mS/cm compared to 0.3 mS/cm in ionic liquid-Nafion membrane composite. The speed of response in actuators with an ionic liquid- Nafion™ mat is 1.34 %/s compared to 0.88 %/s for that in ionic liquid Nafion™ film transducers.

scholarly journals Ion transport and storage of ionic liquids in ionic polymer conductor network composites

2010 ◽  
Vol 96 (22) ◽  
pp. 223503 ◽  
Author(s):  
Yang Liu ◽  
Sheng Liu ◽  
Junhong Lin ◽  
Dong Wang ◽  
Vaibhav Jain ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Ion Transport ◽  
Ionic Polymer ◽  
And Storage

Influence of imidazolium-based ionic liquids on the performance of ionic polymer conductor network composite actuators

2010 ◽  
Vol 59 (3) ◽  
pp. 321-328 ◽  
Author(s):  
Sheng Liu ◽  
Wenjuan Liu ◽  
Yang Liu ◽  
Jun-Hong Lin ◽  
Xin Zhou ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Ionic Polymer

Comparative study of bending characteristics of ionic polymer actuators containing ionic liquids for modeling actuation

2011 ◽  
Vol 109 (7) ◽  
pp. 073505 ◽  
Author(s):  
Kunitomo Kikuchi ◽  
Takumi Sakamoto ◽  
Shigeki Tsuchitani ◽  
Kinji Asaka
Keyword(s):  
Ionic Liquids ◽  
Comparative Study ◽  
Ionic Polymer ◽  
Polymer Actuators

Electromechanical performance and membrane stability of novel ionic polymer transducers constructed in the presence of ionic liquids

2009 ◽  
Author(s):  
Andrew J. Duncan ◽  
Donald J. Leo ◽  
Timothy E. Long ◽  
Barbar J. Akle ◽  
Jong K. Park ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Membrane Stability ◽  
Ionic Polymer ◽  
Electromechanical Performance

Ionic Liquids as Hyper-Stable Solvents for Ionic Polymer Transducers

Aerospace ◽  
2003 ◽  
Author(s):  
Matthew D. Bennett ◽  
Donald J. Leo
Keyword(s):  
Ionic Liquids ◽  
Electrochemical Stability ◽  
Current Work ◽  
Electromechanical Actuators ◽  
Ionic Polymer ◽  
Initial Work

Nafion™ membranes are known to operate as electromechanical actuators and sensors. The transduction in the material is caused by redistribution of the mobile cations in the material, which is made possible because the material is saturated with a solvent. Typically the solvent used is water, although its use limits the performance of these materials. This is due to the chemical breakdown of the water at relatively low operating voltages and the loss of the water to evaporation when these devices are operated in air, causing a corresponding loss of performance. In the current work, the use of highly stable ionic liquids to replace water is explored. Ionic liquids have the advantage of greater electrochemical stability than water, thus offering the possibility of higher actuation voltages for these materials. Also, ionic liquids are known to be non-volatile and therefore will not leach out of the polymer by evaporation as water will. This paper will present the results of some initial work with ionic liquids and will compare these materials to the same polymers solvated with water.

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