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Microhydraulic Electrowetting Actuators

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Abstract—The conversion of electrical to mechanical power on a sub-centimeter scale is a key technology in many microsystems and energy harvesting devices. In this paper, we present a type of a capacitive energy conversion device that uses capillary pressure and electrowetting to reversibly convert electrical power to hydraulic power. These microhydraulic actuators use a high surface-to-volume ratio to deliver high power at a relatively low voltage with an energy conversion efficiency of over 65%.
The capillary pressure generated grows linearly with shrinking capillary diameter, as does the frequency of actuation.We present the pressure, frequency, and power scaling properties of these
actuators and demonstrate that power density scales up as the inverse capillary diameter squared, leading to high-efficiency actuators with a strength density exceeding biological muscle. Two potential applications for microhydraulics are also demonstrated: soft-microrobotics and energy harvesting.

Index Terms—Microhydraulics, microfluidics, actuator, energy conversion, electrowetting, electrocapillary, porous materials, microsystems, soft robotics, microrobotics, energy harvesting,
PDMS

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Informasi Detail

Judul Seri

JOURNAL OF MICROELECTROMECHANICAL SYSTEMS

No. Panggil

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Penerbit

: IEEE., 2016

Deskripsi Fisik

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Bahasa

English

ISBN/ISSN

1057-7157

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

MIKROELEKTROMEKANIKAL

Info Detail Spesifik

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Pernyataan Tanggungjawab

ETY

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