Perfluoroelastomer Electret for Elastic Skin-Patch Energy Harvesting
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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 is complex, complicating their application.
Innovation Solution
A perfluoroelastomer material with iodine- and/or bromine-containing monomers, crosslinked by triallyl isocyanurate, is used to create a skin-patch type electret energy harvesting device with a single substrate and comb-shaped electrodes, allowing for high charge retention and elasticity.
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=CFX where X is F, Cl, or H) and a second monomer unit (CF2=CF-O-Rf where Rf is a perfluoroalkyl group), creating a composite polymer structure that combines the charge retention properties of fluorinated polymers with the elasticity provided by the ether linkage and side chain structure
Solution Approach 2:
The patent optimizes specific parameters including the ratio of monomer units (first monomer 80-98 mol%, second monomer 2-20 mol%), the carbon atom number of Rf group (1-8), and the presence of heteroatoms to achieve the desired balance between charge retention ability and elasticity for skin-patch application
2Power
If conventional energy harvesting device structure is used, then power generation function is achieved, but device structure becomes complex
Solution Approach 1:
The patent merges the electret material and the flexible substrate into a single integrated structure where the electret layer is formed directly on the flexible substrate. This eliminates the need for separate rigid substrates and complex assembly, enabling the device to be conformally attached to skin while maintaining power generation functionality
Solution Approach 2:
The patent employs a flexible substrate with the electret material formed as a thin film on its surface, allowing the entire device to be bent, stretched, and conformally attached to skin. This flexible film structure replaces complex rigid mechanical structures while maintaining the electrostatic induction mechanism for power generation
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 new electret material maintains a stable charge for extended periods and provides a simple, elastic structure suitable for skin-patch applications, generating power through stretching and contracting movements.
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
having flexibility as well as elasticity is required for the device
Data Source
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.