Self-Healing Adhesive Patch Structure for Stable Electronic Skin Sensing
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Solution Overview
Problem
Conventional self-healing polymers face challenges in achieving reversible adhesion and conformal contact with rough, dry, or moist surfaces, and they often suffer from mechanical deficiencies and difficulties in fabricating fine structures due to cracking, defects, and elongation.
Innovation Solution
A self-healing adhesive patch for electronic skin sensors is manufactured using a multilayer structure of elastomer film layers with controlled molar ratios of polymer and isocyanate-based compounds, incorporating different hydrogen bonding strengths to enhance mechanical properties, self-healing characteristics, and adhesive performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional self-healing polymers are used, then self-healing capability is achieved, but mechanical properties and adhesive performance deteriorate
Solution Approach 1:
The patent employs a multilayer composite structure where each layer contains self-healing polymers with different dynamic bond characteristics. By combining multiple materials with complementary properties, the system achieves both self-healing capability and enhanced mechanical strength, resolving the contradiction between these two properties.
Solution Approach 2:
Different layers in the multilayer structure are designed with specific local properties: some layers emphasize self-healing through weak dynamic bonds, while other layers provide mechanical strength through strong dynamic bonds. This spatial differentiation of material properties allows the overall system to exhibit both self-healing and mechanical robustness simultaneously.
2Reliability
If self-healing polymers with dynamic bonds are used, then self-healing capability is improved, but tensile properties and structural integrity worsen
Solution Approach 1:
The multilayer composite structure combines self-healing polymers with different glass transition temperatures and dynamic bond strengths. This composite approach allows the system to maintain structural integrity at operating temperatures while retaining self-healing capability through the dynamic bonds in each layer.
Solution Approach 2:
The patent varies key parameters of the self-healing polymers across different layers, including glass transition temperature, dynamic bond strength, and molecular weight. This parameter optimization ensures that each layer contributes appropriately to both structural integrity and self-healing function under specific operating conditions.
3Strength
If multilayer structure with different molar ratios is used, then mechanical properties and self-healing characteristics are enhanced, but device complexity increases
Solution Approach 1:
The patent divides the adhesive system into multiple discrete layers, each with a specific molar ratio of polymer to crosslinker. This segmentation allows independent optimization of each layer's properties while maintaining overall system functionality, balancing performance enhancement with manageable complexity.
Solution Approach 2:
The multilayer structure serves multiple functions simultaneously: mechanical support, self-healing, adhesion, and crack prevention. By integrating these functions into a single cohesive structure rather than separate components, the patent achieves enhanced performance without proportionally increasing device complexity.
4Reliability
If self-healing polymers are used for skin attachment, then biocompatibility is achieved, but adhesive performance on rough and moist surfaces worsens
Solution Approach 1:
The patent designs the multilayer structure with specific layers optimized for different functions: layers with particular dynamic bond characteristics are positioned to interact with the skin surface, providing both biocompatibility and adhesive performance on rough and moist surfaces while maintaining overall system integrity.
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 multilayer structure achieves superior mechanical properties, self-healing capabilities, biocompatibility, and stretchability, enabling stable biosignal monitoring under various conditions and body movements, and maintaining pattern integrity.
Implementation Method 1
controlling a molar ratio of the polymer compound and the isocyanate-based compound in the elastomer film layer, and laminating the elastomer film layers different from each other in the molar ratio to fabricate the self-healing adhesive patch
Data Source
AI summary
The present invention discloses a method for manufacturing a self-healing adhesive patch for electronic skin sensors and a self-healing adhesive patch for electronic skin sensors manufactured thereby. The present invention is characterized in that the self-healing adhesive patch comprises: a first elastomer film layer including a polymer compound and an isocyanate-based compound, a second elastomer film layer formed on the first elastomer film layer and including a polymer compound and the isocyanate-based compound, and an electrode formed on the second elastomer film layer.