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Development of ionic polymer transducers as flow shear stress sensors

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dc.contributor.author Akle, Barbar J.
dc.contributor.author Griffiths, David
dc.contributor.author Dominic, Justin
dc.contributor.author Vlachos, Pavlos P.
dc.contributor.author Leo, Donald J.
dc.date.accessioned 2017-06-01T12:12:57Z
dc.date.available 2017-06-01T12:12:57Z
dc.date.copyright 2007 en_US
dc.identifier.uri http://hdl.handle.net/10725/5706
dc.description.abstract Ionomeric polymer transducers (IPTs) have recently received a great deal of attention. As actuators, IPT have the ability to generate large bending strain and moderate stress at low applied voltages. Although the actuation capabilities of IPTs have been studied extensively, the sensing performance of these transducers has not received much attention. The work presented herein aims to develop a wall shear stress sensor for aero/hydrodynamic and biomedical applications. Ionic polymers are generally created by an impregnation-reduction process in an ion exchange membrane, typically Nafion, and then coated with a flexible electrode. The traditional impregnation-reduction fabrication technique of IPTs has little control on the electrode thickness. However, the new Direct Assembly Process (DAP) for fabrication of IPTs allows for experimentation with varying conducting materials and direct control of electrode architecture. The thickness of the electrode is controlled by altering the amount of the ionomer/metal mix sprayed on the membrane. Transducers with varied electrode and membrane thicknesses are fabricated. The sensitivity of the transducer is characterized using two basic experiments. First, the electric impedance of the transducer is measured and its capacitive properties are computed. Earlier studies have demonstrated that capacitance has been strongly correlated to actuation performance in IPTs. Subsequently, the sensing capability of the IPTs in bending is measured using a fixed-pined cantilever configuration. Finally the shear stress sensing performance in fluid flow is quantified through a detailed calibration procedure. This is accomplished using two dynamic shear stress calibration apparatuses. In this study we demonstrate a strong correlation between the electrode thickness and the sensing performance of an IPT en_US
dc.language.iso en en_US
dc.publisher SPIE en_US
dc.title Development of ionic polymer transducers as flow shear stress sensors en_US
dc.type Conference Paper / Proceeding en_US
dc.title.subtitle effects of electrode architecture 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 Electrodes en_US
dc.keywords Polymers en_US
dc.keywords Sensors en_US
dc.keywords Transducers en_US
dc.keywords Calibration en_US
dc.keywords Fabrication en_US
dc.keywords Ion exchange en_US
dc.keywords Metals en_US
dc.keywords Capacitance en_US
dc.keywords Actuators en_US
dc.identifier.doi http://dx.doi.org/10.1117/12.715841 en_US
dc.identifier.ctation Griffiths, D., Dominic, J., Akle, B. J., Vlachos, P. P., & Leo, D. J. (2007, April). Development of ionic polymer transducers as flow shear stress sensors: effects of electrode architecture. In The 14th International Symposium on: Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring (pp. 65290L-65290L). International Society for Optics and Photonics. en_US
dc.author.email barbar.akle@lau.edu.lb en_US
dc.conference.date March 18, 2007 en_US
dc.conference.pages 65290L 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=1301101 en_US
dc.author.affiliation Lebanese American University en_US
dc.relation.numberofseries 6529 en_US
dc.title.volume Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2007 en_US


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