MXene Biosignal Electrode Micro-Protrusions
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Solution Overview
Problem
Existing dry electrodes for biosignal sensing, while improving contact with the skin, often cause discomfort and struggle to maintain high conductivity and sensitivity without the use of gel or adhesives.
Innovation Solution
A biosignal sensing electrode utilizing a conductive composite material comprising MXene particles with surface modifiers or terminals that form hydrogen bonds with a hydrophilic polymer, enhancing conductivity and sensitivity while minimizing discomfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protrusion is added to improve contact between the electrode and skin, then contact quality is improved, but patient comfort deteriorates
Solution Approach 1:
The patent changes the surface morphology parameters of the electrode by creating micro-protrusions and valleys through a specific molding process. This provides adequate contact pressure for reliable biosignal detection while keeping the overall electrode surface relatively flat to avoid patient discomfort from large protrusions.
Solution Approach 2:
The electrode surface is designed with localized micro-protrusions distributed across the contact area rather than a single large protrusion. This local quality variation ensures good skin contact at multiple points while maintaining overall comfort.
2Measurement precision
If gel or adhesive is used to improve conductivity and sensitivity, then electrical performance is improved, but allergic reaction risk increases
Solution Approach 1:
The patent removes the gel or adhesive layer from the electrode structure, creating a truly dry electrode. Instead, it relies on the micro-protrusion surface morphology and conductive polymer material to achieve both good electrical contact and skin compatibility, eliminating the allergen source.
Solution Approach 2:
The electrode uses a composite structure combining conductive polymer material with micro-protrusion surface features. This composite approach provides the necessary electrical conductivity and mechanical contact properties without requiring gel or adhesive substances.
3Object-affected harmful factors
If the electrode surface is made flat to improve comfort, then patient comfort is improved, but contact quality and signal detection sensitivity deteriorate
Solution Approach 1:
The patent optimizes the parameters of surface micro-features, creating micro-protrusions with specific height, radius, and distribution patterns. These controlled micro-irregularities provide sufficient contact pressure for sensitive biosignal detection while keeping the overall surface profile relatively flat for patient comfort.
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 electrode achieves high conductivity and sensitivity for biosignal detection without discomfort, even on challenging skin surfaces, such as those with thick stratum corneum, and maintains flexibility, allowing for effective measurement without protrusions.
Implementation Method 1
the polar group is a group that forms a hydrogen bond with the modifier or terminal T of the layer
Data Source
AI summary
A biosignal sensing that includes a conductive composite material containing particles of a layered material including one or plural layers and a polymer, the conductive composite material defining a contact surface with a subject, wherein the one or plural layers include a layer body comprising Ti3C2 and having a modifier or terminal T existing on a surface of the layer body, wherein the modifier or terminal T is at least one selected from the group consisting of a hydroxyl group, a fluorine atom, a chlorine atom, an oxygen atom, or a hydrogen atom, and the polymer is a hydrophilic polymer having a polar group, and the polar group is a group that forms a hydrogen bond with the modifier or terminal T of the layer.