Simultaneous Enhancement of Bending and Blocking Force of an Ionic Polymer-Metal Composite (IPMC) by the Active Use of Its Material Characteristics Change

Tamagawa, Hirohisa; Okada, Kazuki; Mulembo, Titus; Sasaki, Minoru; Naito, K.; Nagai, Gakuji; Nitta, T.; Yew, Khai Chun; Ikeda, Kota

doi:10.3390/act8010029

Cited by 11 publications

(8 citation statements)

References 39 publications

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“…When the bias was reversed, cations migrated from the pores and toward the outer electrodes, minimizing charge storage at the interlayer and thus rapidly creating a compressive force of 2.0 mN. The generated force was more than seven times higher than that of a state-of-the-art bending motion actuator reported in the literature. ,,, The constant force in the plane direction is empowered by the preserved ion concentration gradient at the electrodes because they are in contact with solid-state ion sources …”

Section: Resultsmentioning

confidence: 91%

Smart Bioinspired Actuators: Crawling, Linear, and Bending Motions through a Multilayer Design

Barpuzary

Ham

Park

et al. 2021

ACS Appl. Mater. Interfaces

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To fulfill the insatiable demand for wearable technologies, ionic electroactive polymer actuators have been entrenched as promising candidates that can convert low-input-voltage energy into high mechanical throughput. However, a ubiquitous trilayer design of actuators allows exclusively bending deformation and their highly nonlinear response restricts the true potential of low-voltage actuators for next-generation technology. Herein, we report an unprecedented multilayer design for soft actuators that enables complex deformations shown by skeletal muscles, mechanoreceptors, and plant roots in response to various environmental stimuli. Hierarchically ordered pores in a stretchable interlayer provide excellent electromechanical properties and fast charging kinetics, which enable linear motion by soft actuators at 3 V and under ambient conditions. Our actuators demonstrate astonishing levels of performance, including a 6.5% linear actuation strain, 0.8 s rapid switching speed, and 5000 cycle stable performance in air, producing a 4.2 mN linear blocking force at a ±3 V alternating square-wave voltage. This actuator design demonstrating a walkable spider capable of controlled back-and-forth propelling motion at low driving voltages provides the platform to envision a complex functionality using a portable battery as a power source for soft robotics, wearable exosuits, and biomimetic technologies.

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Section: Resultsmentioning

confidence: 91%

Smart Bioinspired Actuators: Crawling, Linear, and Bending Motions through a Multilayer Design

Barpuzary

Ham

Park

et al. 2021

ACS Appl. Mater. Interfaces

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show abstract

“…One essential path to minimize electrical noise and crosstalk contamination in the signal acquisition is to use a more corrosive-resistant metal to form the electrode. A high-conductivity metal such as silver (6.21 × 10 7 S/m) has been reported by the literature [23] for bend-sensing and actuating [38,39] applications. Although silver has high conductivity, it is prone to corrosion.…”

Section: Characterization Of the Self-powered Ipmc Sensormentioning

confidence: 99%

“…Although silver has high conductivity, it is prone to corrosion. Tamagawa et al [39] reported that silver with low corrosive-resistance could improve IPMC performance by forming a thicker electrode…”

Section: Characterization Of the Self-powered Ipmc Sensormentioning

confidence: 99%

“…Although silver has high conductivity, it is prone to corrosion. Tamagawa et al [39] reported that silver with low corrosiveresistance could improve IPMC performance by forming a thicker electrode layer. This finding might contradict the research that has applied a corrosive-resistant metal, such as gold, to construct the electrode.…”

Section: Characterization Of the Self-powered Ipmc Sensormentioning

confidence: 99%

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Artificial Intelligence-Assisted Throat Sensor Using Ionic Polymer–Metal Composite (IPMC) Material

et al. 2021

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Throat sensing has received increasing demands in recent years, especially for oropharyngeal treatment applications. The conventional videofluoroscopy (VFS) approach is limited by either exposing the patient to radiation or incurring expensive costs on sophisticated equipment as well as well-trained speech-language pathologists. Here, we propose a smart and non-invasive throat sensor that can be fabricated using an ionic polymer–metal composite (IPMC) material. Through the cation’s movement inside the IPMC material, the sensor can detect muscle movement at the throat using a self-generated signal. We have further improved the output responses of the sensor by coating it with a corrosive-resistant gold material. A support vector machine algorithm is used to train the sensor in recognizing the pattern of the throat movements, with a high accuracy of 95%. Our proposed throat sensor has revealed its potential to be used as a promising solution for smart healthcare devices, which can benefit many practical applications such as human–machine interactions, sports training, and rehabilitation.

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“…The most commonly known IEAP is the ionic polymermetal composite (IPMC) which is predominantly used as an actuator. IPMCs are composed of an ionic polymer membrane, typically Nafion, sandwiched between a pair of noble metal electrodes (Nakshatharan et al, 2018;Tamagawa et al, 2019).…”

Section: Types Of Ionic Eapmentioning

confidence: 99%

Integrating Ionic Electroactive Polymer Actuators and Sensors Into Adaptive Building Skins – Potentials and Limitations

Neuhaus

Zahiri

Petrš

et al. 2020

Front. Built Environ.

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Building envelopes separate the confined interior world engineered for human comfort and indoor activity from the exterior world with its uncontainable climatic forces and man-made immission. In the future, active, sustainable and lightweight building skins are needed to serve as an adaptive interface to govern the building-physical interactions between these two worlds. This article provides conceptual and experimental results regarding the integration of ionic electroactive polymer sensors and actuators into fabric membranes. The ultimate goal is to use this technology for adaptive membrane building skins. These devices have attracted high interest from industry and academia due to their small actuation voltages, relatively large actuation and sensing responses and their flexible and soft mechanical characteristics. However, their complex manufacturing process, sophisticated material compositions and their environmental sensitivity have limited the application range until now. The article describes the potentials and limitations of employing such devices for two different adaptive building functionalities: first, as a means of ventilation control and humidity regulation by embedding small actuated apertures into a fabric membrane, and second, as flexible, energy-and cost-efficient distributed sensors for external load monitoring of such structures. The article focusses on designing, building and testing two experimental membrane demonstrators with integrated polymer actuators and sensors. It addresses the challenges encountered and draws conclusions for potential future optimization at the device and system level.

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Simultaneous Enhancement of Bending and Blocking Force of an Ionic Polymer-Metal Composite (IPMC) by the Active Use of Its Material Characteristics Change

Cited by 11 publications

References 39 publications

Smart Bioinspired Actuators: Crawling, Linear, and Bending Motions through a Multilayer Design

Smart Bioinspired Actuators: Crawling, Linear, and Bending Motions through a Multilayer Design

Artificial Intelligence-Assisted Throat Sensor Using Ionic Polymer–Metal Composite (IPMC) Material

Integrating Ionic Electroactive Polymer Actuators and Sensors Into Adaptive Building Skins – Potentials and Limitations

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