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

scholarly journals Supramolecular ionic polymer/carbon nanotube composite hydrogels with enhanced electromechanical performance

2020 ◽  
Vol 9 (1) ◽  
pp. 478-488 ◽  
Author(s):  
Yun-Fei Zhang ◽  
Fei-Peng Du ◽  
Ling Chen ◽  
Ka-Wai Yeung ◽  
Yuqing Dong ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Ion Mobility ◽  
Artificial Muscles ◽  
Ionic Polymer ◽  
Composite Hydrogels ◽  
The Matrix ◽  
Electromechanical Performance ◽  
Carbon Nanotube Composite ◽  
Robotic Devices

AbstractElectroactive hydrogels have received increasing attention due to the possibility of being used in biomimetics, such as for soft robotics and artificial muscles. However, the applications are hindered by the poor mechanical properties and slow response time. To address these issues, in this study, supramolecular ionic polymer–carbon nanotube (SIPC) composite hydrogels were fabricated via in situ free radical polymerization. The polymer matrix consisted of carbon nanotubes (CNTs), styrene sulfonic sodium (SSNa), β-cyclodextrin (β-CD)-grafted acrylamide, and ferrocene (Fc)-grafted acrylamide, with the incorporation of SSNa serving as the ionic source. On applying an external voltage, the ions accumulate on one side of the matrix, leading to localized swelling and bending of the structure. Therefore, a controllable and reversible actuation can be achieved by changing the applied voltage. The tensile strength of the SIPC was improved by over 300%, from 12 to 49 kPa, due to the reinforcement effect of the CNTs and the supramolecular host–guest interactions between the β-CD and Fc moieties. The inclusion of CNTs not only improved the tensile properties but also enhanced the ion mobility, which lead to a faster electromechanical response. The presented electro-responsive composite hydrogel shows a high potential for the development of robotic devices and soft smart components for sensing and actuating applications.

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

Evidence of counterion migration in ionic polymer actuators via investigation of electromechanical performance

2014 ◽  
Vol 205 ◽  
pp. 371-376 ◽  
Author(s):  
Wangyujue Hong ◽  
Catherine Meis ◽  
James R. Heflin ◽  
Reza Montazami
Keyword(s):  
Ionic Polymer ◽  
Polymer Actuators ◽  
Electromechanical Performance
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