Forced and free displacement characterization of ionic polymer transducers

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dc.contributor.author Akle, Barbar J.
dc.contributor.author Duncan, Andrew
dc.contributor.author Akle, Etienne
dc.contributor.author Wallmersperger, Thomas
dc.contributor.author Leo, Donald J.
dc.date.accessioned 2017-06-01T11:41:02Z
dc.date.available 2017-06-01T11:41:02Z
dc.date.copyright 2009 en_US
dc.date.issued 2017-06-01
dc.identifier.uri http://hdl.handle.net/10725/5705
dc.description.abstract Ionic polymer transducers (IPT), sometimes referred to as artificial muscles, are known to generate a large bending strain and a moderate stress at low applied voltages (<5V). Recently Akle and Leo[1] reported extensional actuation in ionic polymer transducers. In this study, extensional IPTs are characterized under forced and free displacement boundary condition as a function of transducer architecture. The electrode thickness is varied from 10 μm up to 40 μm while three extensional actuators with Lithium, Cesium, and tetraethylammonium (TEA) mobile cations are characterized. Three fixtures are built in order to characterize the extensional actuation response. The first fixture measures the free displacement of an IPT sample sandwiched between two aluminum plates glued using the electrically conductive silver paste. In the second fixture a spring is compressed against the test sample with variable amounts to generate different levels of pre-stress and prevents the bending of the IPT. In the third fixture dead weights are placed on top of the sample in order to prevent bending. In the spring loaded fixture a thermocouple is placed in the proximity of the actuator and temperature is measured. The different transducers are characterized using a step voltage input and an alternating current (AC) sine wave input. The step input resulted in a logarithmic rise like displacement curve, while the low frequency (<0.1 Hz) AC excitation generated a sine wave displacement response with a strong first harmonic. The high frequency AC excitation generated a response similar to that of the step input. Comparing the measured temperature for step and AC response demonstrated that the sample is heating up when exited with a high frequency signal; which is leading to the expansion of the sample. Initial experimental results demonstrate a strong correlation between electrode architecture and the peak strain response. Strains on the order of 2% are observed with air stable ionic liquid based transducers. A correlation between the strain and charge buildup in the polymer is also characterized. Cesium (Cs) mobile cation outperformed all other tested mobile charges, while Potassium displaced the least. Keywords: Ionic Polymers, Transducer, Actuator, Electroactive Polymer, Extensional Actuator. en_US
dc.language.iso en en_US
dc.publisher SPIE en_US
dc.title Forced and free displacement characterization of ionic polymer transducers en_US
dc.type Conference Paper / Proceeding en_US
dc.author.school SOE en_US
dc.author.idnumber 200700940 en_US
dc.author.department Industrial And Mechanical Engineering en_US
dc.description.embargo N/A en_US
dc.keywords Polymers en_US
dc.keywords Transducers en_US
dc.keywords Actuators en_US
dc.keywords Cesium en_US
dc.keywords Electrodes en_US
dc.keywords Lithium en_US
dc.keywords Aluminum en_US
dc.keywords Artificial muscles en_US
dc.keywords Potassium en_US
dc.keywords Silver en_US
dc.identifier.doi http://dx.doi.org/10.1117/12.815848 en_US
dc.identifier.ctation Akle, B. J., Duncan, A., Akle, E., Wallmersperger, T., & Leo, D. J. (2009, March). Forced and free displacement characterization of ionic polymer transducers. In SPIE Smart Structures and Materials+ Nondestructive Evaluation and Health Monitoring (pp. 72870N-72870N). International Society for Optics and Photonics. en_US
dc.author.email barbar.akle@lau.edu.lb en_US
dc.conference.date March 08, 2009 en_US
dc.conference.pages 72870N en_US
dc.conference.place San Diego, California, USA en_US
dc.identifier.tou http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php en_US
dc.identifier.url http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1337197 en_US
dc.author.affiliation Lebanese American University en_US
dc.relation.numberofseries 7287 en_US
dc.title.volume Electroactive Polymer Actuators and Devices (EAPAD) 2009 en_US

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