Carbon-Coated Ferroelectric HASEL Actuator Fluid for Higher Contraction
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Solution Overview
Problem
The contraction performance and actuation efficiency of hydraulically amplified self-healing electrostatic (HASEL) actuators vary significantly due to differences in shape, size, and components, necessitating a method to enhance these performance metrics.
Innovation Solution
Incorporating nanoparticles containing ferroelectrics, such as strontium titanate or barium titanate, into the dielectric fluid of HASEL actuators, and coating these nanoparticles with carbon to improve dispersion and dielectric constant.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional dielectric fluid is used in HASEL actuator, then the device structure is simple, but the contraction efficiency and actuation performance are insufficient
Solution Approach 1:
The patent uses composite materials by incorporating ferroelectric nanoparticles (such as barium titanate or strontium titanate) into the dielectric fluid. This composite dielectric fluid enhances the actuation performance and contraction efficiency of the HASEL actuator while maintaining a relatively simple overall device structure. The nanoparticles provide high dielectric constant and ferroelectric properties that amplify the electrostatic effect.
Solution Approach 2:
The patent changes the physical and chemical parameters of the dielectric fluid by adding nanoparticles with specific properties (high dielectric constant, ferroelectric characteristics). This parameter modification allows the dielectric fluid to respond more effectively to applied voltage, thereby improving contraction efficiency without fundamentally changing the actuator's structural design.
2Force
If voltage is increased to improve contraction force, then the external force increases, but the energy consumption and electrical stress increase
Solution Approach 1:
The patent changes the dielectric properties of the fluid by incorporating nanoparticles with high dielectric constants and ferroelectric characteristics. This allows the system to achieve higher external force output at lower voltage levels, reducing energy consumption and electrical stress on the actuator components while maintaining or improving contraction force.
Solution Approach 2:
By using composite dielectric fluid containing ferroelectric nanoparticles, the actuator achieves enhanced force generation efficiency. The ferroelectric properties of the nanoparticles amplify the electrostatic effect, allowing lower operating voltages to produce the same or higher external forces compared to conventional dielectric fluids.
3Productivity
If nanoparticles are added to dielectric fluid to improve dielectric constant, then the contraction efficiency increases, but the dispersion uniformity may deteriorate
Solution Approach 1:
The patent optimizes the size, concentration, and surface properties of the nanoparticles to achieve both high dielectric constant enhancement and uniform dispersion. By carefully controlling nanoparticle parameters (size distribution, surface charge, concentration), the system achieves improved contraction efficiency while maintaining stable and uniform composition throughout the dielectric fluid.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The increased dielectric constant of the dielectric fluid enhances the contraction efficiency of HASEL actuators, leading to improved actuation performance and a higher maximum average external force, which can be achieved with a smaller voltage application.
Implementation Method 1
The HASEL actuator is an artificial muscle that combines Maxwell stress and hydraulic power
Implementation Method 2
by including nanoparticles containing ferroelectrics in the dielectric fluid of the HASEL actuator, the dielectric constant of the dielectric fluid can be increased
Implementation Method 3
a dielectric fluid including nanoparticles including ferroelectrics
Implementation Method 4
The HASEL actuator is an artificial muscle that combines Maxwell stress and hydraulic power
Implementation Method 5
by coating carbon on nanoparticles included in the dielectric fluid of the HASEL actuator, the nanoparticles can be well dispersed in the dielectric fluid
Data Source
AI summary
A hydraulically amplified self-healing electrostatic (HASEL) actuator based on carbon-coated nanoparticles are disclosed. According to an embodiment of a present disclosure, the HASEL actuator includes a dielectric fluid, which is a liquid-type insulator that has polarity when voltage is applied, a film configured to covering the dielectric fluid and electrodes attached to both outer surfaces of the film and configured to move the dielectric fluid. And the dielectric fluid includes nanoparticles including ferroelectrics.