Grafted Fluoroelastomer Coatings for Thermal Stability
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Solution Overview
Problem
Conventional fluoroelastomer-based oleophobic coatings lack thermal stability and exhibit reduced hydrophobic or oleophobic properties when exposed to high temperatures and pressures, making them unsuitable for applications requiring durability and resistance to high-temperature, high-pressure processes.
Innovation Solution
A thermally stable oleophobic grafted polymer coating is developed by crosslinking fluoroelastomers with perfluorinated polyethers, which are then grafted to form a robust and durable surface layer that maintains hydrophobic and oleophobic properties even at elevated temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fluoroelastomer-based coatings are used to provide oleophobic properties, then hydrophobic and oleophobic behavior is achieved, but thermal stability is insufficient and properties degrade at high temperatures
Solution Approach 1:
The patent creates a composite coating system combining fluoroelastomer base polymer with grafted perfluorinated polyether side chains. This composite structure integrates the thermal stability of the crosslinked fluoroelastomer network with the low surface energy and oleophobic properties of the perfluorinated polyether grafts, resolving the contradiction between thermal stability and hydrophobic/oleophobic behavior retention.
Solution Approach 2:
The patent modifies the chemical structure of the fluoroelastomer by introducing perfluorinated polyether side chains through grafting. This parameter change in molecular architecture transforms the coating's thermal response characteristics, enabling it to maintain its oleophobic properties at temperatures where conventional fluoroelastomers would degrade.
2Reliability
If fluoroelastomers are crosslinked to improve thermal stability, then thermal resistance increases, but the complexity of the coating process increases
Solution Approach 1:
The crosslinking of the fluoroelastomer and the grafting of perfluorinated polyether side chains are performed in advance during the coating formulation and application process, rather than requiring separate post-application treatment steps. This preliminary action integrates the thermal stabilization into the coating process itself, reducing overall process complexity while achieving the desired thermal stability.
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 resulting coating exhibits excellent thermal stability, low adhesion, and self-cleaning properties, with high ink contact angles and low sliding angles, making it suitable for high-definition piezo printhead applications and other stringent conditions.
Implementation Method 1
A perfluorinated polyether is grafted to the crosslinked fluoroelastomer group
Implementation Method 2
Known low surface energy fluoropolymers are employed for water repellancy, fingerprint and smudge resistant coatings
Data Source
AI summary
An article of manufacture comprising a substrate and an outer polymer coating on the substrate. The polymer coating comprises an oleophobic grafted polymer comprising a crosslinked fluoroelastomer group. A perfluorinated polyether is grafted to the crosslinked fluoroelastomer group.