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Updated: Jun 14, 2026

Microfluidic Preparation of Liquid Crystalline Elastomer Actuators

Microfluidic Preparation of Liquid Crystalline Elastomer Actuators

Published on: May 20, 2018

Ultralight soft electrostatic actuators based on solid-liquid-gas architectures.

Hyeong-Joon Joo¹, Toshihiko Fukushima¹, Xiying Li¹

¹Robotic Materials Department, Max Planck Institute for Intelligent Systems, Stuttgart, Germany.

Nature Communications

|February 19, 2026

Summary

This summary is machine-generated.

Ultralight soft electrostatic actuators now incorporate gaseous dielectrics, significantly boosting power-to-weight ratios for adaptable robots. This innovation enhances robotic agility and performance in unstructured environments.

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Area of Science:

Robotics
Materials Science
Electrostatics

Background:

Soft actuators are crucial for adaptable robots operating in complex environments.
Electrohydraulic soft electrostatic actuators offer good performance but are limited by the mass of liquid dielectrics.
Improving the power-to-weight ratio is key for enhanced robotic capabilities.

Purpose of the Study:

To develop ultralight soft electrostatic actuators with improved power-to-weight ratios.
To investigate the use of solid-liquid-gas architectures in soft actuators.
To establish guidelines for selecting gaseous dielectrics based on electrical breakdown limits.

Main Methods:

Theoretical and experimental analysis of solid-liquid-gas actuator architectures.
Utilizing the Peano-HASEL actuator as a model system.
Investigating gas mixtures (C4F7N and CO2) and ambient air as gaseous dielectrics.

Main Results:

Achieved a specific energy of 51.4 J/kg with a C4F7N and CO2 gas mixture, a nine-fold improvement.
Attained a specific energy of 33.5 J/kg and a power-to-weight ratio of 1600 W/kg using ambient air.
Demonstrated a 60% increase in jump height in a jumping robot utilizing these enhanced actuators.

Conclusions:

Introduction of gaseous dielectrics in soft electrostatic actuators substantially improves power-to-weight ratio and actuation speed.
Paschen's law governs the electrical breakdown limit in gaseous dielectrics, providing a selection guideline.
Ultralight soft electrostatic actuators show significant potential for agile and adaptable robotic systems.