Crosslinked Conductive Polymer Coating for Heat and Moisture Resistance
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Solution Overview
Problem
Conductive polymers like PEDOT/PSS experience a decrease in conductivity and structural changes such as peeling or cracking under high heat and high humidity conditions, making them unreliable for harsh environments.
Innovation Solution
Incorporating a vinyl sulfone group-containing compound as a dopant or additive in the conductive polymer composition, which forms a network structure through crosslinking reactions, enhancing moisture and heat resistance of the coating film.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional conductive polymers (PEDOT/PSS) are used as solid electrolyte, then the capacitor can be manufactured with standard materials, but the coating film exhibits poor moisture and heat resistance leading to peeling and cracking under harsh conditions
Solution Approach 1:
The patent combines conductive polymer with vinyl sulfone group-containing compound to form a composite coating film. The vinyl sulfone compound contains multiple functional groups including vinyl groups for crosslinking and sulfone groups for polarity and adhesion, creating a composite structure that maintains conductivity while improving moisture and heat resistance
Solution Approach 2:
The patent modifies the chemical composition parameters by introducing vinyl sulfone groups with specific functional characteristics. The crosslinking density and polarity are adjusted through the vinyl sulfone compound content and structure, transforming the coating film from a simple conductive polymer into a crosslinked composite with enhanced environmental stability
2Reliability
If crosslinking is introduced to improve moisture and heat resistance, then the coating film stability improves, but the manufacturing process becomes more complex
Solution Approach 1:
The vinyl sulfone group-containing compound is pre-incorporated into the conductive polymer composition before coating application. The crosslinking functionality is prepared in advance within the coating formulation, allowing the crosslinking reaction to occur automatically during the standard drying/heating process without requiring separate crosslinking steps
Solution Approach 2:
The coating film performs self-crosslinking during the normal drying and heating process after application. The vinyl groups in the vinyl sulfone compound automatically undergo crosslinking reactions when exposed to heat and moisture, enabling the coating to self-strengthen and form a stable network structure without external intervention or additional processing steps
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 conductive polymer composition exhibits improved storage stability, moisture resistance, and heat resistance, maintaining high capacitance appearance rates even under extreme conditions.
Implementation Method 1
a vinyl sulfone group-containing compound containing a vinyl sulfone group is included as a dopant of the conductive polymer or an additive
Implementation Method 2
a π-conjugated conductive polymer
Data Source
AI summary
A conductive polymer composition having the resistance to moisture and heat in the coating film is provided. A conductive polymer composition comprising a solvent and a π-conjugated conductive polymer is provided. A vinyl sulfone group-containing compound containing a vinyl sulfone group as a dopant of the conductive polymer or an additive is included and when the conductive polymer composition contains the vinyl sulfone group-containing compound as the additive, the vinyl sulfone group-containing compound contains a plurality of vinyl sulfone groups.