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Multiscale Implications of Stress-Induced Ionic Polymer Transducer Sensing

Zangrilli, Ursula (2013) Multiscale Implications of Stress-Induced Ionic Polymer Transducer Sensing. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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Ionic Polymer Transducers (IPTs) can act as both actuators and sensors. As actuators, the energy density values are much better than PZT or PVDF materials. As sensors, IPTs are extraordinarily sensitive and have the potential to be used in any mode of deformation. However, application of IPT sensors is limited because of a lack of understanding of their fundamental physics. In this work, the main focus will be to explore and develop a better understanding of how IPTs function with respect to shear deformation. In turn, the results developed here will improve upon the state of understanding of IPT sensors in general and potentially expand meaningful application opportunities.
Because IPT active response is a multiscale phenomenon, this study adopts a multiscale modeling framework. Of interest are the interplay among the polymeric backbone of the ionic polymer, the diluent present in the hydrophilic regions of the polymer and the interspersed electrode particulate.
To begin, this work improves upon a past multiscale modeling framework for the polymer backbone based upon Rotational Isomeric State Theory such that the effects of material anisotropy may be considered. This is potentially significant in light of the polymer manufacturing process. These modeling results are then incorporated into a model of the diluent movement within the ionic transport regions of the IPT. The electrical current predictions are based upon streaming potential theories. Finally, this model incorporates viscoelastic behavior in order to develop a better understanding of the coupling of these two systems (the polymer and the diluent) and how this coupling influence affects the expected current output over time.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Zangrilli, Ursulautz1@pitt.eduUTZ1
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairWeiland, Lisalmw36@pitt.eduLMW36
Committee MemberTo, Albertalbertto@pitt.eduALBERTTO
Committee MemberLee, Jung-Kunjul37@pitt.eduJUL37
Committee MemberWang, Qiang-Mingqiw4@pitt.eduQIW4
Committee MemberPorfiri,
Date: 25 September 2013
Date Type: Publication
Defense Date: 12 April 2013
Approval Date: 25 September 2013
Submission Date: 28 April 2013
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 187
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Mechanical Engineering
Degree: PhD - Doctor of Philosophy
Thesis Type: Doctoral Dissertation
Refereed: Yes
Uncontrolled Keywords: ionic polymer transducers; sensing; streaming potential theory; annealing experiments
Date Deposited: 25 Sep 2013 15:56
Last Modified: 01 Aug 2017 14:03


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