Cross-linked PVDF Polymer Actuator for Thermal Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electrolyte polymer actuators face challenges with increased volume due to liquid electrolyte containment and unreliable sealing, while solid alternatives using acrylonitrile butadiene rubber and polypyrrole have limitations in thermal stability and chemical resistance.
Innovation Solution
A polymer actuator is developed using a cross-linked polyvinylidene fluoride (PVDF)-based polymer matrix with a conductive polymer and electrolytic material, featuring a fluorine-containing terpolymer structure that includes vinylidene fluoride, trifluoroethylene, and chlorotrifluoroethylene units, and employing a cross-linking agent to enhance thermal stability and chemical resistance, with electrodes made from conductive polymers like polypyrrole and poly(3,4-ethylenedioxythiophene).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If liquid electrolyte is used in polymer actuators, then ionic conductivity is improved, but device volume increases and sealing reliability deteriorates
Solution Approach 1:
The patent changes the physical state of the electrolyte from liquid to solid by incorporating ionic liquid into the polymer matrix, achieving high ionic conductivity without requiring a containment chamber. This parameter change resolves the contradiction by eliminating the volume penalty and sealing issues associated with liquid electrolytes while maintaining excellent ionic conductivity.
Solution Approach 2:
The patent creates a composite solid electrolyte by combining polymer matrix with ionic liquid, achieving synergistic properties. The composite structure provides both the mechanical integrity of solid polymers and the high ionic conductivity of ionic liquids, resolving the contradiction between conductivity and volume/sealing requirements.
2Volume of stationary object
If solid electrolyte polymers are used to reduce volume, then device volume is reduced, but thermal stability and chemical resistance deteriorate
Solution Approach 1:
The patent employs a composite polymer-ionic liquid electrolyte system where the ionic liquid component provides exceptional thermal stability and chemical resistance. This composite approach allows the solid electrolyte to achieve both compact volume and superior compositional stability, overcoming the limitations of conventional solid polymer electrolytes.
Solution Approach 2:
The patent changes the chemical composition and structure of the solid electrolyte by incorporating ionic liquid functional groups, which fundamentally improves thermal and chemical stability parameters while maintaining the solid state and compact form factor.
3Stability of the object's composition
If cross-linking is applied to PVDF-based polymer, then thermal stability and chemical resistance are improved, but manufacturing complexity increases
Solution Approach 1:
The patent utilizes chemical cross-linking of PVDF-based polymer to fundamentally change the polymer network structure, creating a three-dimensional gel framework. This parameter change in molecular architecture provides exceptional thermal and chemical stability while the cross-linking process can be integrated into existing polymer processing methods.
Solution Approach 2:
The patent creates a cross-linked polymer-ionic liquid composite gel electrolyte where the cross-linked network provides structural stability and thermal resistance, while the ionic liquid provides ionic conductivity. This composite cross-linked structure achieves superior performance while maintaining manufacturing feasibility through established cross-linking techniques.
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 solution provides a polymer actuator with excellent thermal stability, chemical resistance, and low-voltage operation, achieving significant displacement and operational reliability.
Implementation Method 1
The PVDF-based polymer is cross-linked, preferably by a cross-linking agent
Implementation Method 2
a solid electrolyte polymer layer including a polyvinylidene fluoride (PVDF)-based polymer matrix and an electrolytic material
Implementation Method 3
a crosslinked fluorine-containing polymer is a crosslinked terpolymer comprising a vinylidene fluoride as a first structural unit, a fluorine-containing monomer as a second structural unit
Data Source
Figure 1~2
Figure 3A~3B
Figure 3C~3E
AI summary
An electrolyte polymer film including a cross-linked polyvinylidene fluoride (PVDF)-based polymer as the matrix and an electrolytic material dispersed in the matrix, and a polymer actuator including the cross-linked PVDF-based polymer film disposed between two electrodes of conductive polymer.