Cookware Non-Stick Coating with Temperature-Activated Mobile Phase
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Solution Overview
Problem
Current non-stick coatings for cookware, such as those using fluorinated polymers, face issues with durability and effectiveness at high temperatures, particularly with complex liquids like milk or meat juices, and require frequent cleaning which can compromise their non-stick performance.
Innovation Solution
A non-stick coating with a layered structure comprising an infusible domain with a softening temperature above 200°C and a fusible domain with a softening temperature above ambient temperature but below that of the infusible material, allowing a mobile phase to form only at high temperatures, maintaining a solid surface at lower temperatures for improved durability and ease of cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a non-stick coating uses a solid surface at high temperature, then the non-stick performance is maintained, but the coating durability deteriorates due to thermal degradation
Solution Approach 1:
The coating composition changes its physical state based on temperature: at cooking temperatures it becomes mobile to provide non-stick properties, and at lower temperatures it solidifies to maintain structural integrity and durability. This parameter change resolves the contradiction by allowing the coating to exhibit different properties at different temperatures.
Solution Approach 2:
The coating transitions from a static solid structure to a dynamic mobile phase during cooking, then returns to solid state during cooling. This dynamic behavior allows the coating to adapt its properties to operational conditions, maintaining both non-stick performance and durability.
2Reliability
If a non-stick coating uses omniphobic materials like PTFE, then the non-stick performance is improved, but the durability deteriorates due to structural defects and carbonized food debris
Solution Approach 1:
The coating uses temperature-dependent mobility to prevent food debris accumulation. At cooking temperatures, the mobile phase prevents adhesion of food particles, and at lower temperatures, the solidified coating maintains its structural integrity, avoiding the durability issues associated with PTFE's structural defects.
3Reliability
If a non-stick coating uses SLIPS technology with lubricating liquid, then the non-stick performance is improved, but the coating complexity increases due to the need for liquid replenishment
Solution Approach 1:
The coating contains both the solid matrix and the lubricating liquid phase within a single integrated structure. The liquid phase is self-contained and does not require external replenishment, as it is released and retained within the coating structure during thermal cycling, simplifying the overall system.
Solution Approach 2:
The coating is a composite material combining a solid matrix with an embedded lubricating liquid phase. This composite structure integrates multiple functions (structural support and non-stick performance) into a single material system, reducing overall complexity.
4Reliability
If a non-stick coating uses SLIPS technology, then the non-stick performance is improved, but the ease of operation deteriorates due to the need for frequent cleaning and recharging
Solution Approach 1:
The coating maintains its lubricating liquid phase through thermal cycling during normal use, eliminating the need for user intervention to replenish the liquid. The coating self-regenerates its non-stick properties through temperature variations during cooking and cooling cycles.
Solution Approach 2:
The coating undergoes periodic thermal cycling during use, which naturally releases and redistributes the lubricating liquid phase. This periodic thermal action maintains the non-stick properties without requiring manual cleaning or recharging operations.
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 coating provides a permanent, high-temperature-resistant non-stick effect that remains effective after washing and is compatible with diverse culinary conditions, reducing the need for recharging and maintaining anti-adhesion properties even under stressful cooking conditions.
Implementation Method 1
the fusible range comprising at least one fusible material having a softening temperature greater than ambient temperature and lower by at least 20° C. than the softening temperature of the infusible material
Implementation Method 2
Playing on the thermal transition of part of the outer layer of the non-stick coating (melting area), for example by melting a filler, a wax, a polymer or a polymer segment, makes it possible to obtain a mobile phase (liquid film)
Data Source
AI summary
The present invention relates to a nonstick coating, characterized in that it comprises at least one outer layer comprising at least one infusible domain and at least one fusible domain the infusible domain comprising at least one infusible material having a softening point above 200°C, and the fusible domain comprising at least one fusible material having a softening point above ambient temperature and at least 20°C below the softening point of the infusible material. The present invention also relates to a utensil comprising a support having two opposite faces, at least one of which is covered with a nonstick coating according to the invention, and also to processes for manufacturing such a utensil.