Conductive Polymer Actuator Adhesion via Polyvinylphenol Embedding
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Solution Overview
Problem
Conventional electrically conductive polymer actuators suffer from detachment issues between the electrically conductive polymer membrane and the solid electrolyte membrane formed with an ion gel, leading to deterioration during repeated operation.
Innovation Solution
A laminating structure comprising a solid electrolyte membrane with a mixture of ionic liquid and specific organic polymers, and an electrically conductive polymer membrane with polystyrene sulfonic acid (PSS) and polyethylenedioxythiophene (PEDOT) on at least one face, where polyvinylphenol (PVP) is embedded in the electrically conductive polymer membrane surface to enhance adhesive properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If an electrically conductive polymer membrane is laminated on a solid electrolyte membrane formed with an ion gel, then the actuator structure is simple and miniaturization is easy, but detachment occurs between the membranes during repeated operation
Solution Approach 1:
A porous layer is introduced as an intermediary between the electrically conductive polymer membrane and the solid electrolyte membrane. This porous layer acts as a mediator that enhances adhesion and prevents detachment during repeated operation, while maintaining the overall simplicity of the actuator structure.
Solution Approach 2:
The solid electrolyte membrane is formed as a composite material comprising an ion gel and a porous polymer. This composite structure combines the ionic conductivity of the ion gel with the mechanical stability and porosity of the polymer, improving both adhesion and overall membrane performance.
2Weight of moving object
If a gel is allowed to bend by an electric voltage, then the actuator is compact and light weight, but the bendability cannot be maintained unless continuous voltage application due to small initiation stress
Solution Approach 1:
The initiation stress of the electrically conductive polymer is enhanced through parameter changes in the polymer composition and structure. This allows the actuator to maintain its compact and light-weight gel-based design while reducing continuous power consumption by achieving sufficient initiation stress for sustained bending motion.
3Volume of moving object
If a dielectric elastomer thin film is used for deformation, then the actuator is compact, but high voltage of several hundred to several kilo volts is required
Solution Approach 1:
The operating voltage is reduced from several hundred to several kilo volts down to safer levels by changing the material parameters of the dielectric elastomer thin film. This allows the actuator to maintain its compact size while eliminating the electric shock risk associated with high voltage operation.
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 improved adhesive properties between the electrically conductive polymer membrane and the solid electrolyte membrane prevent detachment, allowing for stable and repeated bending motion without deterioration, even under low voltage operation.
Implementation Method 1
one in which expansion and contraction of an electrically conductive polymer is allowed by an oxidative-reductive reaction
Implementation Method 2
ions are incorporated into the electrically conductive polymer membrane, or taken out therefrom
Data Source
AI summary
To improve adhesive properties between an electrically conductive polymer membrane and a solid electrolyte membrane to each other, and thus to ensure the operation of an electrically conductive polymer actuator which effects a bending motion is aimed.The bendable electrically conductive polymer actuator of the present invention is an electrically conductive polymer actuator having a laminating structure of: a first organic polymer including at least one or more of a vinylidene fluoride/hexafluoropropylene copolymer, polyvinylidene fluoride, a perfluorosulfonic acid/polytetrafluoroethylene copolymer, polymethyl methacrylate, polyethylene oxide, and polyacrylonitrile; a solid electrolyte membrane including a mixture with an ionic liquid; and an electrically conductive polymer membrane including a mixture of polyethylenedioxythiophene and polystyrene sulfonic acid on at least one face of the solid electrolyte membrane, in which a second organic polymer including polyvinylphenol is embedded in the electrically conductive polymer membrane surface in the state being dispersed.