Influence of temperature on the impedance of ionic polymer metal composites

Cha, Youngsu; Kim, Hubert; Porfiri, Maurizio

doi:10.1016/j.matlet.2014.06.183

Cited by 12 publications

(11 citation statements)

References 18 publications

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“…The higher water uptake property of the ionomeric membrane is accountable for the enhanced performance of actuator. The water retion capability even at elevated temperature may be due to the presence of more active thermally enlarged PO 4 2groups on composite cation exchange membrane. 2).…”

Section: Resultsmentioning

confidence: 99%

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Poly(3,4-ethylenedioxythiophene):polystyrene sulfonate zirconium(iv) phosphate (PEDOT:PSS–ZrP) composite ionomeric membrane for artificial muscle applications

et al. 2015

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The PEDOT:PSS-ZrP ionomeric actuator was developed for artificial muscle applications. The polyvinyl chloride (PVC) based (PEDOT:PSS) Zr(IV) phosphate composite ionomeric membrane (PVC-PEDOT:PSS-ZrP) was successfully synthesized by solution casting technique. Various instrumental techniques including thermogravimetric analysis/differential thermal analysis/differential thermogravimetry (TGA/DTA/DTG), energy dispersive X-ray (EDX) analysis, scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared (FT-IR) spectroscopy were used to characterize the PVC-PEDOT:PSS-ZrP ionomeric material. Membrane properties were evaluated in terms of ion exchange capacity, cyclic and linear sweep voltammetry, water uptake, water loss and proton conductivity. The tip displacement of PVC-PEDOT:PSS-ZrP composite ionomeric membrane was also studied. The composite ionomeric membrane showed excellent displacement under applied voltage. Therefore, composite ionomeric membrane was found suitable for bending actuation applications in artificial muscles.

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Section: Resultsmentioning

confidence: 99%

“…(4) where, W w and W d are the weights of the soaked/wet and dry membranes observed before and after applying the voltage, respectively. (4) where, W w and W d are the weights of the soaked/wet and dry membranes observed before and after applying the voltage, respectively.…”

Section: Water Lossmentioning

confidence: 99%

Poly(3,4-ethylenedioxythiophene):polystyrene sulfonate zirconium(iv) phosphate (PEDOT:PSS–ZrP) composite ionomeric membrane for artificial muscle applications

et al. 2015

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“…Under the stimulus of a relatively low electrical field (2–3 V) through the thickness of an IPMC, cationic migration occurs predominantly due to electrophoresis of hydrated cations in the presence of an imposed electric field across the membrane (Annabestani & Naghavi, ). Indeed, when a voltage is applied between the two electrodes, the IPMC actuator is bent by migration of cations from one side of the Nafion membrane towards the other side ( Figure ; Cha et al, ; Annabestani, Maymandi‐Nejad, & Naghavi, ; Annabestani & Naghavi, ). Due to the ion migration in the IPMC actuators, which results in the actuation mechanism, their dynamic characteristics are highly non‐linear (Brufau‐Penella, Sánchez‐Martín, & Puig‐Vidal, ; Brunetto, Fortuna, Giannone, Graziani, & Strazzeri, , ; Cha et al, ; Dong & Tan, ; Ganley, Hung, Zhu, & Tan, ; Kiwon, ; Shahinpoor et al, ).…”

Section: Introductionmentioning

confidence: 99%

“…Ionic polymer-metal composites (IPMCs) are an important class of electroactive polymers, which can be used both as sensors and actuators, depending on the mechanical or electrical stimulating inputs (Cha, Kim, & Porfiri, 2014;Dong & Tan, 2015). A basic IPMC consists of three layers.…”

Section: Introductionmentioning

confidence: 99%

A combined fuzzy logic and artificial neural network approach for non‐linear identification of IPMC actuators with hysteresis modification

2018

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Ionic polymer–metal composite (IPMC) actuators are one of the most prominent electroactive polymers with expected widespread use in the future. IPMC actuators exhibit hysteresis, which causes non‐linearity in bending behaviour of them. In this paper, a modified adaptive neuro‐fuzzy inference system and a non‐linear autoregressive with exogenous input (ANFIS–NARX) approach is presented for non‐linear identification of IPMC actuators. The proposed method utilizes a hysteresis operator, which increases the accuracy of the IPMC identification in combination with an ANFIS–NARX structure. The proposed model has a flexible structure to estimate the output (IPMC displacement as an actuator) for different training and testing data sets. Experimental results are provided to show the effectiveness of the accurate tracking capability of the proposed method to capture the real mechanical displacement features of the IPMC actuator.

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“…On two independent studies, Brunetto et al and Ganley et al describe the sensing properties and modeling of the IPMCs for a range of temperatures above the ambient temperature and humidity [ 17 , 18 ]. Cha et al and Farinholt et al considered the effect of temperature on the IPMCs’ impedance [ 19 , 20 ]. Benziger et al[ 21 ] measured the elastic modulus of Nafion membrane at different temperatures and humidity and observed that under dry conditions, the elastic modulus of Nafion decreased gradually with increasing temperature (up to 60 °C), with a steep decrease at 70 °C.…”

Section: Introductionmentioning

confidence: 99%

Influence of Temperature on the Electromechanical Properties of Ionic Liquid-Doped Ionic Polymer-Metal Composite Actuators

Almomani

Hong

et al. 2017

Polymers

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Ionic polymer-metal composite (IPMC) actuators have considerable potential for a wide range of applications. Although IPMC actuators are widely studied for their electromechanical properties, most studies have been conducted at the ambient conditions. The electromechanical performance of IPMC actuators at higher temperature is still far from understood. In this study, the effect of temperature on the electromechanical behavior (the rate of deformation and curvature) and electrochemical behavior (current flow) of ionic liquid doped IPMC actuators are examined and reported. Both electromechanical and electrochemical studies were conducted in air at temperatures ranging from 25 • C to 90 • C. Electromechanically, the actuators showed lower cationic curvature with increasing temperature up to 70 • C and a slower rate of deformation with increasing temperature up to 50 • C. A faster rate of deformation was recorded at temperatures higher than 50 • C, with a maximum rate at 60 • C. The anionic response showed a lower rate of deformation and a higher anionic curvature with increasing temperatures up to 50 • C with an abrupt increase in the rate of deformation and decrease of curvature at 60 • C. In both cationic and anionic responses, actuators started to lose functionality and show unpredictable performance for temperatures greater than 60 • C, with considerable fluctuations at 70 • C. Electrochemically, the current flow across the actuators was increased gradually with increasing temperature up to 80 • C during the charging and discharging cycles. A sudden increase in current flow was recorded at 90 • C indicating a shorted circuit and actuator failure.

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Influence of temperature on the impedance of ionic polymer metal composites

Cited by 12 publications

References 18 publications

Poly(3,4-ethylenedioxythiophene):polystyrene sulfonate zirconium(iv) phosphate (PEDOT:PSS–ZrP) composite ionomeric membrane for artificial muscle applications

Poly(3,4-ethylenedioxythiophene):polystyrene sulfonate zirconium(iv) phosphate (PEDOT:PSS–ZrP) composite ionomeric membrane for artificial muscle applications

A combined fuzzy logic and artificial neural network approach for non‐linear identification of IPMC actuators with hysteresis modification

Influence of Temperature on the Electromechanical Properties of Ionic Liquid-Doped Ionic Polymer-Metal Composite Actuators

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