Conductive Polymer Composition for Flexible, Tough Biosensors
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Solution Overview
Problem
Existing electrically conductive compositions, such as PEDOT-PSS and PVA, while offering excellent electrical conductivity and formability, fall short in achieving both high tenacity and flexibility, which are essential for durable and flexible conductive objects, particularly in biosensors that require reliable connections with living tissues.
Innovation Solution
An electrically conductive composition comprising a conductive polymer, a binder resin, and at least one of a cross-linking agent and a plasticizer, where the binder resin is water-soluble, and the cross-linking agent includes zirconium compounds, isocyanate compounds, or aldehyde compounds, and the plasticizer includes polyol compounds, enhancing the tenacity and flexibility of the conductive objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mixture of PEDOT-PSS and PVA is used as the electrically conductive composition, then excellent electrical conductivity and formability are achieved, but the tenacity and flexibility are insufficient
Solution Approach 1:
The patent creates a composite material system by combining PEDOT-PSS (conductive polymer) with PVA (binder resin) and adding cross-linking agents (such as zirconium compounds, isocyanate compounds, or aldehyde compounds) and plasticizers (such as polyol compounds). This composite approach allows the material to simultaneously achieve excellent electrical conductivity from PEDOT-PSS, high tenacity from the cross-linked PVA network, and flexibility from the plasticizer components, thereby resolving the contradiction between conductivity and mechanical strength.
2Reliability
If a mixture of PEDOT-PSS and PVA is used as the electrically conductive composition, then excellent electrical conductivity and formability are achieved, but the flexibility is insufficient
Solution Approach 1:
The patent employs a composite material strategy where PEDOT-PSS provides electrical conductivity, PVA provides structural framework, cross-linking agents enhance mechanical strength, and plasticizers (such as polyol compounds) specifically improve flexibility. The synergistic combination of these components allows the electrically conductive object to maintain both excellent electrical conductivity and high flexibility, enabling it to conform to skin and other curved surfaces.
3Strength
If cross-linking agent and plasticizer are added to the electrically conductive composition, then high tenacity and flexibility are achieved, but the composition complexity increases
Solution Approach 1:
The patent optimizes the composition by carefully controlling the ratios and concentrations of cross-linking agents and plasticizers relative to the binder resin and conductive polymer. By adjusting these parameters within specific ranges, the patent achieves high tenacity and flexibility without excessive complexity. The cross-linking agent concentration is optimized to provide sufficient mechanical strength while the plasticizer concentration is optimized to provide flexibility, creating a balanced composition that meets performance requirements without unnecessary complexity.
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 composition enables the creation of electrically conductive objects with high tenacity and flexibility, ensuring excellent connection reliability in biosensors, particularly wearable biosensors that need to conform to skin and maintain durability.
Implementation Method 1
The electrically conductive composition contains a cross-linking agent, and therefore an electrically conductive object with excellently high tenacity and flexibility can be prepared
Implementation Method 2
The electrically conductive composition contains a plasticizer, and therefore an electrically conductive object with excellently high tenacity and flexibility can be prepared
Data Source
AI summary
The electrically conductive composition includes an electrical conductive polymer, a binder resin, and at least one of a cross-linking agent and a plasticizer.