Bioelectrode Silver Coating Layer Strain Resistance
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Solution Overview
Problem
Conventional bioelectrodes face issues with poor adhesion to the skin, insufficient detection of electrical signals, and strain resistance due to their material properties, leading to noise in measurement signals and limited suitability for repetitive use.
Innovation Solution
A bioelectrode comprising a conductive rubber electrode with a silver coating layer containing silver particles and modified silicone, which facilitates both electron and ion conductivity, enhancing adhesion and maintaining electrical conductivity even under deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal sheets (gold, silver, platinum, copper) are used as bioelectrode materials, then electrical conductivity is improved, but adhesion to skin deteriorates and detection of electrical signals becomes insufficient
Solution Approach 1:
The invention uses a composite material consisting of conductive rubber containing carbon nanotubes and a gel layer. The conductive rubber provides flexibility and strain resistance, while the gel layer enhances skin adhesion and electrical signal detection. This composite structure resolves the contradiction by combining materials with complementary properties rather than using pure metal sheets.
2Ease of operation
If adhesive gel electrodes are used, then adhesion to skin is improved and application of additional gel is not required, but trash and dust adhere to the adhesive material and adherence is gradually lost
Solution Approach 1:
The conductive rubber electrode forms a flexible base layer that maintains structural integrity and resists deformation. The gel layer is applied as a thin film on top, providing adhesion while the underlying rubber structure prevents the accumulation of trash and dust from compromising the overall electrode performance and durability.
3Reliability
If carbon nanotubes and conductive filler are compounded in rubber, then electrical conductivity is achieved, but strain resistance deteriorates when external force is applied
Solution Approach 1:
The invention creates different functional zones: the conductive rubber layer provides strain resistance and mechanical flexibility, while the gel layer on top provides electrical conductivity and skin contact. This local differentiation of material properties allows each layer to excel at its specific function without compromising the other.
4Reliability
If metal bioelectrodes are used, then electrical conductivity is improved, but flexibility and long-term adherence deteriorate
Solution Approach 1:
The conductive rubber composite combines carbon nanotubes with rubber matrix to achieve both electrical conductivity and flexibility. The rubber matrix provides elastic deformation capability while the carbon nanotube network maintains electrical pathways, enabling the electrode to conform to skin movements and maintain long-term adherence.
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 bioelectrode achieves improved electrical conductivity and strain resistance, allowing for accurate bioelectric signal measurement and long-term use without discomfort, while maintaining flexibility and reducing noise from external forces.
Implementation Method 1
a silver coating layer provided on the conductive rubber electrode and containing a silicone rubber and silver particles
Implementation Method 2
The silver coating layer contains a modified silicone and contains ions for ion conduction among the silver particles
Data Source
AI summary
A bioelectrode includes a conductive rubber electrode and a silver coating layer provided on the conductive rubber electrode and containing a silicone rubber and silver particles. The silver coating layer contains a modified silicone and contains ions for ion conduction among the silver particles.