Electroconductive Composition Adhesion on PVDF via Amide Binder
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Solution Overview
Problem
Forming a PEDOT-PSS film with sufficient adhesive strength on glass or plastic base materials is challenging, especially when using PVDF, as conventional methods either require introducing fluorine-containing groups or using binder resins that do not effectively enhance adhesion.
Innovation Solution
An electroconductive composition comprising polystyrene sulfonic acid, poly(3,4-ethylenedioxythiophene), water, and a polymer with an amide group as a side chain, which enhances adhesion by forming a uniform film with high affinity to the base material, even on vinylidene fluoride-based resins like PVDF.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If PEDOT-PSS water dispersion is applied to glass or plastic base materials and water is removed by heated-air drying, then a PEDOT-PSS film is formed on the base material, but the adhesive strength of the film to the base material is low
Solution Approach 1:
The patent introduces a binder resin as an intermediary substance between the PEDOT-PSS water dispersion and the base material. The binder resin contains functional groups that interact with both the PEDOT-PSS and the base material, thereby enhancing adhesive strength. This mediator resolves the contradiction by providing a chemical bridge that enables strong adhesion without complicating the film formation process.
Solution Approach 2:
The patent modifies the chemical composition parameters of the water dispersion by adding specific binder resins with functional groups capable of interacting with both PEDOT-PSS and base materials. This parameter change in the dispersion formulation enables the formation of films with sufficient adhesive strength while maintaining the simplicity of the application process.
2Strength
If fluorine-containing groups are introduced into both the base material and PEDOT to enhance adhesive strength, then adhesive strength is improved, but the characteristics of the base material are varied
Solution Approach 1:
Instead of modifying the base material itself with fluorine-containing groups, the patent uses a binder resin as an intermediary that contains the necessary functional groups. This approach preserves the original characteristics and stability of the base material while still achieving enhanced adhesive strength through the binder resin's interaction with both the base material and PEDOT-PSS.
3Strength
If a PEDOT-PSS water dispersion added with a binder resin is used to form a film on PVDF base material, then adhesion may be improved, but it is extremely difficult to directly form a PEDOT-PSS film on PVDF using conventional binder resins
Solution Approach 1:
The patent specifically selects binder resins with functional groups that are compatible with PVDF's chemical structure. By changing the parameters of the binder resin selection criteria to match PVDF's characteristics, the patent enables direct film formation on PVDF base materials, overcoming the incompatibility issue that prevents conventional binder resins from working with PVDF.
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 achieves high adhesive strength and uniform film quality, enabling the direct formation of electroconductive films on various base materials, including PVDF, while maintaining electroconductivity and stability.
Implementation Method 1
a polymer having an amide group as a side chain, which enhances adhesion by forming a uniform film with high affinity to the base material
Implementation Method 2
the water is removed by heated-air drying and the like to form a PEDOT-PSS film on the base material
Data Source
AI summary
An electroconductive composition including polystyrene sulfonic acid, poly(3,4-ethylenedioxythiophene), water, an organic solvent having an affinity to water and a polymer having an amide group as a side chain.