Conductive Pressure-Sensitive Adhesive for Long-Term Bio-Signal Monitoring
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Solution Overview
Problem
Conductive pressure sensitive adhesives used for bio-signal monitoring are not sustainable and often require single-use materials, lacking long-term applicability and causing skin irritation, with existing compositions needing ionic liquids for conductivity.
Innovation Solution
A conductive pressure sensitive adhesive composition comprising a copolymer derived from an acrylic monomer mixture and a compound of Formula (I), which includes sulfate or sulfonate groups, offering improved ion conductivity and peel strength without ionic liquids, suitable for dry film applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ionic liquids are used to achieve conductivity in pressure sensitive adhesives, then ion conductivity is improved, but the adhesive causes skin irritation and requires single-use materials
Solution Approach 1:
The patent changes the chemical composition parameters by replacing ionic liquids with compounds of formula (I) that contain sulfate or sulfonate groups. These compounds provide similar ionic conductivity without the harmful skin irritation effects, achieving the same electrical function with improved biocompatibility
Solution Approach 2:
The patent creates a composite adhesive system combining the copolymer matrix with compounds of formula (I) that have both conductive and skin-friendly properties. This composite approach maintains the conductivity function while eliminating the harmful effects of traditional ionic liquids
2Reliability
If traditional conductive adhesives are used for long-term monitoring, then conductivity is achieved, but the materials dry out and lose effectiveness
Solution Approach 1:
The patent develops an adhesive system that is self-regulating and does not require external moisture or ionic liquids to maintain conductivity. The compounds of formula (I) provide sustained ionic conductivity through their molecular structure, allowing the adhesive to maintain its function indefinitely without drying out
3Reliability
If single-use materials are used for bio-signal monitoring, then conductivity is achieved, but sustainability is compromised
Solution Approach 1:
The patent eliminates the need for disposable single-use materials by creating a conductive adhesive that can be reused indefinitely. The compound of formula (I) integrated into the copolymer provides lasting conductivity without degrading, transforming the adhesive from a disposable to a reusable product
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 adhesive provides long-term bio-signal monitoring with low impedance, avoiding drying out and skin irritation, and exhibits enhanced peel strength and conductivity, suitable for electrodes and skin applications.
Implementation Method 1
the conductive pressure sensitive adhesive composition of the present invention provides improved ion conductivity
Implementation Method 2
the impedance of the conductive pressure sensitive adhesive composition according to the present invention is very low without any addition of water
Data Source
AI summary
The present invention relates to a conductive pressure sensitive adhesive comprising a copolymer obtained from a reaction mixture comprising an acrylic monomer mixture and a special styrene derivative, a process for the production of said conductive pressure sensitive adhesive composition and its use. The present invention also relates to the acrylic monomer per se, processes for preparing it and uses thereof in polymerization processes.