Flexible Conductive Material with Adsorbent for Leakage Current Reduction
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Solution Overview
Problem
The transfer of impurities from flexible conductive materials to dielectric films in actuators and sensors leads to increased electrical resistance, leakage current, and reduced durability, limiting the application of high voltages and displacements.
Innovation Solution
Incorporating an adsorbent within the flexible conductive material that adsorbs and fixes ionized impurities, preventing their transfer to the dielectric film, thereby reducing electrical resistance and enhancing durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible conductive material containing elastomer and conductive agent is used for electrodes, then the electrode flexibility and extendability are improved, but impurities in the elastomer may ionize and transfer to the dielectric film, increasing electrical resistance and reducing durability
Solution Approach 1:
A barrier layer is introduced between the flexible conductive material (electrode) and the dielectric film. This barrier layer acts as an intermediary that prevents ionized impurities from transferring from the electrode to the dielectric film, while still allowing the electrode to maintain its flexibility and extendability. The barrier layer selectively blocks harmful ions while permitting the functional operation of the actuator.
Solution Approach 2:
The electrode structure is designed as a composite material system consisting of multiple layers: the flexible conductive material layer (elastomer with conductive agent), the barrier layer (with specific ion-blocking properties), and the dielectric film layer. This composite structure combines the advantages of flexibility from the elastomer with the protective ion-blocking properties of the barrier layer, resolving the contradiction between flexibility and durability.
2Power
If high voltage is applied to drive the actuator, then the displacement and power output are improved, but the electrostatic attraction increases compressive force on the dielectric film, and impurity transfer is accelerated
Solution Approach 1:
The barrier layer serves as a protective intermediary that becomes increasingly important under high voltage conditions. It prevents the accelerated impurity transfer that would otherwise occur at high voltages, allowing the actuator to operate at high power levels without the detrimental effects of impurity contamination in the dielectric film.
Solution Approach 2:
The barrier layer is pre-installed between the electrode and dielectric film before high voltage operation begins. This provides beforehand protection against impurity transfer, cushioning the dielectric film from the harmful effects that would otherwise occur during high voltage, high power operation. The barrier layer is in place before the harmful impurity transfer process can initiate.
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 solution effectively minimizes the transfer of impurities, reducing leakage current and allowing for higher voltage applications while maintaining the physical integrity of the dielectric film, thus improving the performance and durability of transducers and sensors.
Implementation Method 1
Incorporating an adsorbent within the flexible conductive material that adsorbs and fixes ionized impurities
Implementation Method 2
an electrostatic attraction between the electrodes increases. Therefore, the dielectric film sandwiched between the electrodes is compressed in a thickness direction
Implementation Method 3
the compressive force on the dielectric film in the thickness direction is reduced, and the film thickness increases due to an elastic restorative force of the dielectric film
Data Source
AI summary
A flexible conductive material includes an elastomer, a conductive agent filled in the elastomer, and an adsorbent fixed inside the elastomer and able to adsorb ionic material. With the flexible conductive material, ionized impurities are unlikely to transfer to an adherend such as a dielectric film. Thus, leakage current during application of voltage decreases. Accordingly, by forming an electrode and a wiring with the flexible conductive material, leakage current can be reduced, and a transducer and a flexible wiring board having excellent durability can be produced. In addition, using the flexible conductive material, an electromagnetic shield can be produced having a small leakage current.