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Browsing School of Engineering by Author "Leo, Donald J."

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Browsing School of Engineering by Author "Leo, Donald J."

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  • Ionomer design for augmented charge transport in novel ionic polymer transducers 
    Akle, Barbar J.; Duncan, Andrew J.; Long, Timothy E.; Leo, Donald J. (2016-10-17)
    Ionic polymer transducers are devices that display electromechanical transduction and are projected to have extensive applications as actuators and sensors. This study employs novel, highly branched sulfonated polysulfones ...
  • Modeling and optimization of IPMC actuator for autonomous jellyfish vehicle (AJV) 
    Akle, Barbar J.; Joshi, Keyur B.; Leo, Donald J.; Priya, Shashank (SPIE, 2017-05-30)
    Ionomeric Polymer Metal Composite (IPMC) actuators generate high flexural strains at small voltage amplitudes of 2-5V. IPMCs bend toward the anode when a potential drop is applied across its thickness. The actuation mechanism ...
  • Multi-scale modeling of ion transport in high-strain ionomers with conducting powder electrodes 
    Akle, Barbar; Leo, Donald J.; He, Xingxi (2018-01-22)
    Ionomeric polymer transducers exhibit electromechanical coupling capabilities. The ion transport due to electric stimulus is the primary mechanism of actuation for a class of polymeric active materials known as ionomeric ...
  • Multilayer ionic polymer transducer 
    Akle, Barbar J.; Leo, Donald J. (SPIE, 2017-06-01)
    A transducer consisting of multiple layers of ionic polymer material is developed for applications in sensing, actuation, and control. The transducer consists of two to four individual layers each approximately 200 microns ...
  • On the relationship between the electric double layer and actuation in ionomeric polymer transducers 
    Akle, Barbar J.; Leo, Donald J. (2017-05-29)
    Ionic polymer transducers are soft actuators that perform large bending deflections when voltages on the order of 1–5 V are applied across their thickness. Previous work showed that actuation performance of ionic polymer ...
  • Optimization of active electrodes for novel ionomer-based ionic polymer transducers 
    Akle, Barbar J.; Duncan, Andrew J.; Sarles, Stephen A.; Leo, Donald J.; Long, Timothy E.; Bennett, Matthew D. (SPIE, 2017-06-01)
    This study expands the number of novel synthetic ionomers specifically designed for performance as ionic polymer transducers (IPT) membranes, specifically employing a highly branched sulfonated polysulfone. Control of the ...
  • Single-Walled Carbon Nanotubes – Ionic Polymer Electroactive Hybrid Transducers 
    Akle, Barbar J.; Leo, Donald J. (2016-10-13)
    Ionic electroactive polymers, sometimes referred to as artificial muscles, have the ability to generate large bending strain and moderate stress at low applied voltages. Typical types of ionic electroactive polymer transducers ...
  • Softening and heating effects in ionic polymer transducers 
    Akle, Barbar J.; Leo, Donald J. (2016-10-20)
    This study reports the softening and heating of ionic polymer transducers during actuation. This is the first account of such effects that will impact the understanding of the actuation mechanisms and the physical modeling ...
  • The use of active ionic polymers in dynamic skin friction measurements 
    Akle, Barbar; Etebari, Ali; Farinholt, Kevin; Bennet, Matthew; Leo, Donald J.; Valchos, Pavlos P. (ASME, 2017-05-31)
    A class of wall shear stress sensors has been developed. The potential of ionic polymer membrane transducers for measuring skin friction in liquid flows is demonstrated. Ionic polymer transducers are thin polymer membranes ...

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