Hot-Melt Organopolysiloxane Electrode Layers for Uniform Transducers
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Solution Overview
Problem
Existing electrode-forming compositions are limited to liquid or solvent-based processes, leading to non-uniformity and insufficient viscoelasticity in electrode layers, especially when applied to transducers with high physical displacement, and lack suitability for solvent-free and electrode printing processes.
Innovation Solution
A hot-melt electrode layer-forming organopolysiloxane composition comprising linear organopolysiloxane, high molecular weight organopolysiloxane resin, and conductive fine particles, which is non-fluid at 25°C and heat meltable, allowing for solvent-free application and forming an electrode layer with excellent viscoelastic properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If liquid or solvent-based electrode-forming compositions are used, then the composition can be applied easily, but the electrode layer becomes non-uniform and lacks sufficient viscoelasticity
Solution Approach 1:
The patent changes the physical state parameter of the composition from liquid to solid (hot-melt) form, and adjusts the molecular weight parameter of the organopolysiloxane resin to 5000 or more. This resolves the contradiction by enabling the composition to be applied in a controlled solid state while achieving uniform electrode layers with sufficient viscoelasticity after heating and curing.
Solution Approach 2:
The patent creates a composite material system combining high molecular weight organopolysiloxane resin (5000+), linear organopolysiloxane, and conductive fine particles. This composite structure provides both the applicability of a processable material and the uniformity/viscoelasticity of a structured solid, resolving the contradiction between ease of operation and manufacturing precision.
2Ease of manufacture
If liquid compositions are used for electrode formation, then the composition can be applied by coating processes, but the composition lacks handling properties and storage stability
Solution Approach 1:
The patent utilizes phase transition by designing a hot-melt composition that is solid at storage temperature but melts when heated to the application temperature range. This phase change enables the composition to maintain stability during storage and handling as a solid, while becoming applicable for electrode formation when melted, thus resolving the contradiction between manufacturability and stability.
3Adaptability or versatility
If conventional liquid electrode-forming compositions are used, then coating processes can be applied, but the compositions are not suitable for solvent-free and electrode printing processes
Solution Approach 1:
The patent creates a universal hot-melt composition that can be applied through multiple processes including solvent-free coating and electrode printing. The solid-state formulation at room temperature with controlled melting behavior enables compatibility with various application methods while maintaining reliable performance in high displacement transducers, thus resolving the contradiction between adaptability and reliability.
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 uniform, heat-resistant, and durable electrode layers with strong adhesion and conformability, reducing peeling issues even in transducers with significant physical displacement, and supports flexible process design including solvent-free and electrode printing.
Implementation Method 1
the organopolysiloxane composition is non-fluid at 25° C. and is heat meltable
Implementation Method 2
an electrode layer must be provided on an electroactive film serving as a dielectric layer
Data Source
AI summary
Provided is an electrode layer-forming composition, a laminate body, uses thereof, and a production method thereof, which can form an electrode layer having viscoelastic properties sufficient for practical use, which can be coated with a hot-melt process, which has excellent adhesion to a dielectric layer, conformability, and shape retention properties to the resulting electrode layer, and which is unlikely to cause problems such as peeling or defects in the electrode layer even when used in a transducer. A hot-melt electrode layer-forming organopolysiloxane composition contains: (A) a linear organopolysiloxane; (B) an MQ type organopolysiloxane resin having a weight average molecular weight of 5000 or more in terms of a polystyrene standard; and (E) conductive fine particles. The composition is non-fluid at 25° C. and has heat melting properties. The amount of component (B) in the composition is 45 mass % or more relative to the entire composition.