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A study of electroactive polyvinyl chloride (PVC) gel actuators through the use of the electric modulus formalism and cyclic linear voltage sweeps

Journal Article · · Smart Materials and Structures

The conductivity and dielectric properties are integral to the function of polyvinyl chloride (PVC) gel actuators. The frequency-dependent properties of PVC gel actuators are investigated here in terms of their impedance, permittivity, and for the first time, electric modulus. The data shows that PVC gels’ conductive properties are just as, if not more, important as their dielectric properties in electromechanical transduction applications. The electrode polarization (EP) and its impact on the impedance and dielectric spectra of PVC gels, as well as the developed asymmetric space charge at the anode, are discussed. The electric modulus and tan δ spectra are used for the fitting of Cole-Cole (CC) and Debye relaxation models for gels of varying plasticizer content. The electrostatic adhesive force for PVC gels of varying plasticizer is also measured, indicating large electrostatic adhesion (>2 N cm-2). A cyclic linear voltage sweep is used to clarify the dynamics of space charge within the gels. The peak current (associated with space charge development) is seen to be concurrent with the onset of mechanical deformation, showing the asymmetric charge as the origin of electromechanical transduction. Additionally, the maximum charge transferred (as measured by the integration of current over time) before space charge development is found to correlate with the electrostatic adhesive force measured for the gels, pointing to a new method of characterizing PVC gels for actuation.

Research Organization:
Savannah River National Laboratory (SRNL), Aiken, SC (United States). Minority Serving Institution Partnership Program (MSIPP)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC09-08SR22470
OSTI ID:
1982450
Journal Information:
Smart Materials and Structures, Vol. 31, Issue 3; ISSN 0964-1726
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English

References (37)

Recent advances in plasticized PVC gels for soft actuators and devices: a review journal January 2019
Spring-like electroactive actuators based on paper/ionogel/metal nanocomposites journal May 2018
Ionic polymer-metal composites: I. Fundamentals journal August 2001
Dielectric and electromechanical studies of plasticized poly(vinyl chloride) fabricated from plastisol journal February 2013
Ionic polymer-metal composites (IPMCs) as biomimetic sensors, actuators and artificial muscles - a review journal December 1998
High-performance polyvinyl chloride gel artificial muscle actuator with graphene oxide and plasticizer journal July 2019
A brief overview of theories of PVC plasticization and methods used to evaluate PVC-plasticizer interaction journal December 2009
PVC gel based artificial muscles: Characterizations and actuation modular constructions journal September 2015
Electrically Active Non-ionic Artificial Muscle journal May 2006
The influence of vanadium pentoxide on the structure and dielectric properties of poly(vinyl alcohol) journal August 2010
About dielectric relaxation in highly cross-linked poly(ethylene oxide) journal December 2018
Effect of plasticizer on the electric-field-induced adhesion of dielectric PVC gels journal January 2012
Position Control of a Contraction Type PVC Gel Actuator journal January 2012
Effect of hard segment content on structure, dielectric and mechanical properties of hydroxyl-terminated butadiene-acrylonitrile copolymer-based polyurethane elastomers journal December 2017
Modeling electrode polarization in dielectric spectroscopy: Ion mobility and mobile ion concentration of single-ion polymer electrolytes journal April 2006
Effects of plasticizers on novel electromechanical actuations with different poly(vinyl chloride) gels journal August 2003
Electric modulus powerful tool for analyzing dielectric behavior journal June 2014
Electrically Active Artificial Pupil Showing Amoeba-Like Pseudopodial Deformation journal July 2009
Dielectric permittivity and electric modulus of polyethylene oxide (PEO)–LiClO4 composite electrolytes journal March 2012
Transparent actuator made with few layer graphene electrode and dielectric elastomer, for variable focus lens journal July 2013
Sur la relaxation d'une charge d'espace journal January 1983
Dispersion and Absorption in Dielectrics II. Direct Current Characteristics journal February 1942
High-Performance PVC Gel for Adaptive Micro-Lenses with Variable Focal Length journal May 2017
Polymeric Bio-Inspired Dry Adhesives: Van der Waals or Electrostatic Interactions? journal September 2013
Investigation of MWS polarization and dc conductivity in polyamide 610 using dielectric relaxation spectroscopy journal May 2011
High-Resolution, Large-Area Fabrication of Compliant Electrodes via Laser Ablation for Robust, Stretchable Dielectric Elastomer Actuators and Sensors journal August 2015
Fast-response microlens array fabricated using polyvinyl chloride gel journal June 2019
Electrical properties and electromechanical modeling of plasticized PVC gel actuators journal November 2018
Broadband dielectric spectroscopy of BMPTFSI ionic liquid doped solid-state polymer electrolytes: Coupled ion transport and dielectric relaxation mechanism journal August 2020
Basics of teaching electrochemical impedance spectroscopy of electrolytes for ion-rechargeable batteries – part 2: dielectric response of (non-) polymer electrolytes journal May 2021
Relationship between electrode polarization and electrical actuation of dielectric PVC gel actuators journal January 2012
Direct Observation by Laser Scanning Confocal Microscopy of Microstructure and Phase Migration of PVC Gels in an Applied Electric Field journal February 2011
Dynamic leakage current compensation in ferroelectric thin-film capacitor structures journal April 2005
Influence of Plasticizer Content on the Transition of Electromechanical Behavior of PVC Gel Actuator journal June 2011
Electric modulus and interfacial polarization in composite polymeric systems journal April 1998
Electric-Field-Induced Local Layer Structure in Plasticized PVC Actuator journal August 2010
Nanothorn electrodes for ionic polymer-metal composite artificial muscles journal August 2014