Perfluoroelastomer Electret Skin Patch for Charge Retention and Flexibility
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Solution Overview
Problem
Conventional electret materials lack sufficient elasticity and charge retention ability, making them unsuitable for skin-patch type energy harvesting devices, and their structure requires complex movement of substrates, complicating their application.
Innovation Solution
A perfluoroelastomer material with iodine- and/or bromine-containing monomers, crosslinked with triallyl isocyanurate, is used to create a skin-patch type device with comb-shaped electrodes on a single substrate, allowing charge retention and elasticity, and power generation through changing the gap between electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electret materials are used, then charge retention ability is improved, but elasticity is insufficient
Solution Approach 1:
The patent uses a copolymer composition comprising a first monomer unit (CF2=CF-X where X is a fluorine-containing group) and a second monomer unit (CF2=CF-R where R is a hydrogen-containing group), creating a composite material that combines the charge retention properties of fluorinated structures with the elasticity of hydrogen-containing polymer chains. This composite approach resolves the contradiction between charge retention and elasticity.
2Power
If conventional energy harvesting device structure is used, then power generation is achieved, but device structure becomes complex
Solution Approach 1:
The patent combines the electret layer and the flexible substrate into a single integrated structure where the electret is formed directly on the flexible substrate. This merging eliminates the need for separate rigid substrates and complex assembly mechanisms, reducing device complexity while maintaining power generation capability through body movements.
Solution Approach 2:
The patent employs a flexible substrate that can deform with body movements, replacing rigid structures. This flexible film approach allows the device to conform to skin surfaces and move with the body, simplifying the overall device structure while enabling power generation through natural body motions without requiring complex mechanical mechanisms.
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 provides a high charge retention ability and elasticity, enabling a simple structure for a skin-patch type energy harvesting device that generates power through human movement, with improved durability and comfort.
Implementation Method 1
An electret energy harvesting device is an element which converts vibrations in the environment to electric power by electrostatic induction using an electret's electric field
Implementation Method 2
the present disclosure provides an electret material having a high charge retention ability and having elasticity
Data Source
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AI summary
[Problem] Provided are an electret material which has high charge retention ability and elasticity, and a skin-patch type electret energy harvesting device using the same. [Solution] An iodine- and/or bromine-containing perfluoroelastomer or a crosslinked elastomer formed by crosslinking this elastomer, is used an electret material. These materials have elasticity and are capable of forming an electret by being charged by means of a soft X-ray. In addition, a skin-patch type electret energy harvesting device is obtained by forming the electret on one of two comb-shaped electrodes that are arranged to be parallel to each other.