scholarly journals Conductive filler morphology effect on performance of ionic polymer conductive network composite actuators

2010 ◽  
Author(s):  
Sheng Liu ◽  
Yang Liu ◽  
Hulya Cebeci ◽  
Roberto Guzman de Villoria ◽  
Jun-Hong Lin ◽  
...  
Keyword(s):  
Conductive Filler ◽  
Conductive Network ◽  
Ionic Polymer ◽  
Morphology Effect ◽  
Conductive Network Composite

The Effect of Ionic Liquid Uptake and Self-assembled Conductive Network Composite Layers on NafionTM based Ionic Polymer Metal Composite Electromechanical Bending Actuators

2013 ◽  
Vol 1575 ◽  
Author(s):  
Dong Wang ◽  
Reza Montazami ◽  
James R. Heflin
Keyword(s):  
Ionic Liquid ◽  
Porous Electrode ◽  
Metal Composite ◽  
Ionic Polymer Metal Composite ◽  
Conductive Network ◽  
Bending Performance ◽  
Ionic Polymer ◽  
Polymer Metal ◽  
Self Assembled ◽  
Conductive Network Composite

ABSTRACTIonic liquid (IL) is used as the working electrolyte in ionic polymer metal composite (IPMC) electromechanical bending actuators because of its high stability and conductivity, which are crucial for the consistency and speed of the actuation. Because the bending actuation is caused by the migration and accumulation of the cations and anions of the IL, it is clear that both the overall number of ions and the effectiveness of ion transport and accumulation play important roles in the actuation behavior. In this paper, the effect of enhancing the ion accumulation by the self-assembled conductive network composite (CNC) layers is investigated by comparing the bending behavior of actuators with and without CNC layers. In addition, IPMC actuators with various IL uptakes are also tested in order to study the dependence of the bending performance on the amount of the ions available. It is found that, with the CNC layers, the maximum bending curvature of the actuator increases with increased IL, which shows the crucial role played by the IL. However, under the same conditions, the performance improvement of actuators without CNC layers saturates when the IL uptake reaches around 10% wt. This demonstrates the role of the CNC layers to provide a porous electrode with increased capacitance that thus accommodates accumulation of more ions near the electrodes, which in turn boosts the overall bending curvature of the actuator.

Investigating a few key issues of ionomeric polymer conductive network composite electromechanical transducers

2009 ◽  
Author(s):  
Sheng Liu ◽  
Minren Lin ◽  
Yang Liu ◽  
Qiming Zhang ◽  
Reza Montazami ◽  
...  
Keyword(s):  
Conductive Network ◽  
Key Issues ◽  
Electromechanical Transducers ◽  
Conductive Network Composite

Temperature Dependent Electrical Properties of Conductive Composites (Behavior at Cryogenic Temperature and High Temperatures)

2010 ◽  
Vol 123-125 ◽  
pp. 447-450 ◽  
Author(s):  
M. Rahaman ◽  
Tapan Kumar Chaki ◽  
D. Khastgir
Keyword(s):  
High Temperature ◽  
Electrical Properties ◽  
Temperature Region ◽  
Thermal Hysteresis ◽  
Conductive Filler ◽  
Effect Of Temperature ◽  
Conductive Network ◽  
Particulate Carbon ◽  
Carbon Filler ◽  
Conductive Composites

Extrinsically conductive polymer composites can be developed by incorporation of conductive filler in suitable polymer matrix. The formation of conductive network in insulating matrix due to filler aggregation at and above percolation is responsible for electrical conductivity of such composites. The present investigation deals with effect of temperature on conductive composites made from different blends of Ethylene-Vinyl copolymer (EVA) and Acrylonitrile-Butadiene copolymer (NBR) filled with particulate carbon filler. The electrical properties of these composites depend on blend composition and filler loading. High temperature (303-393K) DC-resistivity against temperature for EVA and EVA blends composites show positive coefficient of temperature (PCT effect) followed by negative coefficient of temperature (NCT effect) thus passing through a maxima which corresponds to crystalline melting temperature(~348K) of EVA phase. Further the variation of conductivity during heating cooling cycle does not coincides and leads to some kind of thermal hysteresis due to change in conductive network structure. However in low temperature region (10-300K), the resistivity is found to increase with decrease in temperature (NCT effect) and hysteresis effect is also marginal compared to that observed in high temperature region. This difference resistivity/conductivity vs temperature behavior in two different temperature zones suggests that different two mechanisms are operative in the system.

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