Elastomer Dielectric Constant via Ceramic Particulate Poling
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Solution Overview
Problem
Conventional methods for increasing the dielectric constant of elastomeric materials to enhance tactile feedback in virtual reality systems result in reduced flexibility, which is undesirable in applications where flexibility is beneficial.
Innovation Solution
Incorporating dielectric ceramic particulates into elastomers and applying an electric field during curing to increase the dielectric constant while maintaining elasticity, either by layering particulates or structures on top of the elastomer or stacking thin cured layers, allowing for customization of dielectric constant and elasticity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If conventional methods are used to increase the dielectric constant of elastomeric materials, then the dielectric constant increases, but the flexibility of the elastomeric material decreases
Solution Approach 1:
The patent creates a composite material by embedding dielectric ceramic particulates within the elastomeric matrix. This composite structure allows the elastomer to maintain its inherent flexibility while the ceramic particulates provide enhanced dielectric properties, resolving the contradiction between increasing dielectric constant and maintaining flexibility.
Solution Approach 2:
The dielectric ceramic particulates are distributed throughout the elastomeric material, creating local regions of high dielectric constant while the surrounding elastomer maintains flexibility. This local enhancement approach allows the material to exhibit both high dielectric constant and flexibility simultaneously.
2Force
If dielectric ceramic particulates are densely layered onto elastomer, then the dielectric constant increases, but the brittleness of the cured structure increases
Solution Approach 1:
The patent uses thin layers of elastomer to separate and embed the dielectric ceramic particulates, creating a flexible composite structure. The thin elastomer films maintain flexibility while holding the particulates in a configuration that maximizes dielectric constant without creating excessive brittleness.
Solution Approach 2:
The patent transitions from two-dimensional dense layering of particulates to a three-dimensional embedded structure where particulates are distributed within the elastomeric matrix. This dimensional change allows for better stress distribution and reduced brittleness while maintaining high dielectric constant.
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 approach enhances the dielectric constant of elastomers, improving tactile feedback sensitivity while retaining flexibility, enabling more effective translation of physical motion to virtual environments.
Implementation Method 1
As capacitance of a dielectric material increases proportionally to the value of the dielectric constant (κ) of the dielectric material, increasing values of dielectric constant for elastomeric materials allows actuators or other components including elastomer materials to be more sensitive
Implementation Method 2
As the dielectric constant of a material is related to the material's net remnant ferroelectric polarization, which may be increased by poling near the material's Curie temperature, application of the electric field to the elastomer doped to include the dielectric ceramic particulates increases a value of the dielectric constant of the dielectric ceramic particulates
Implementation Method 3
application of an electric field the elastomers onto which the dielectric ceramic particulates are deposited while maintaining a temperature at or near a melting point of the elastomer and a Curie temperature of the dielectric ceramic particulates
Data Source
AI summary
Dielectric ceramic particulates are introduced into thin a sheet of pre-cured elastomer to form a sheet. Successive layers of the sheets may then be laminated together to form a finished article. An electric field may be applied to the article during a curing process while the article is at a temperature near a Curie temperature of the dielectric ceramic particulates to increase a dielectric constant of the article. As each sheet may be different from each other in the finished article, the resulting finished article may have anisotropic dielectric and mechanical properties. Similarly, tiled dielectric ceramic structures may be introduced into the elastomers layers to generate materials with varying dielectric constants.