Fireproof Composition Using Carbon Nanotubes and Polysiloxane
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Solution Overview
Problem
Traditional fire-resistant coatings and seals in aeronautics face challenges due to high filler content, which compromises flexibility and mechanical properties, and existing fire-resistant materials' seals melt before critical temperatures, reducing the fireproof advantage.
Innovation Solution
A composition of reticulated polysiloxane with raw carbon nanotubes, where the carbon nanotubes represent 0.05-1% of the total weight, providing excellent heat resistance and flexibility, allowing for easy application as a coating or seal, achieved through a method involving the production of a mixture with polysiloxane and hydrosilane groups, followed by reticulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional fire-resistant coatings use high filler content to improve fire resistance, then fire-resistant properties are improved, but mechanical properties and flexibility deteriorate
Solution Approach 1:
The patent uses a composite material system combining polysiloxane polymer with carbon nanotubes and phyllosilicates. This composite structure provides fire resistance through the inorganic fillers while the polymer matrix maintains mechanical flexibility and strength, resolving the contradiction between fire resistance and mechanical properties
Solution Approach 2:
The patent optimizes the filler content parameters, specifically limiting total filler to 10-60% by volume with carbon nanotubes at 1-30% and phyllosilicates at 1-50%, rather than using traditional high filler content. This parameter optimization maintains fire resistance while preserving mechanical properties and flexibility
2Reliability
If traditional fire-resistant coatings use high filler content to improve fire resistance, then fire-resistant properties are improved, but flexibility and ease of application deteriorate
Solution Approach 1:
The composite of polysiloxane with controlled filler content creates a material that is both fire-resistant and sufficiently flexible for application. The polymer matrix provides flexibility while the fillers provide fire resistance, enabling the coating to follow thermal expansion and movement without cracking
Solution Approach 2:
By controlling the total filler content to 10-60% and specifically limiting carbon nanotubes to 1-30%, the patent achieves a balance where the coating remains flexible enough for application by spraying or brushing while maintaining fire-resistant properties
3Reliability
If seals use traditional materials to achieve fire resistance, then fire-resistant properties are improved, but temperature resistance before melting deteriorates
Solution Approach 1:
The patent uses a composite seal material combining polysiloxane with carbon nanotubes and phyllosilicates. This composite structure raises the melting temperature and maintains structural integrity at high temperatures better than traditional seal materials, while still providing fire resistance
Solution Approach 2:
The patent optimizes the composition parameters of the seal material, using specific ratios of carbon nanotubes (1-30%) and phyllosilicates (1-50%) within the polysiloxane matrix to achieve both fire resistance and high temperature resistance, preventing premature melting
4Strength
If polymer-based coatings use pasty consistency to improve adhesion, then adhesion is improved, but ease of application by spraying deteriorates
Solution Approach 1:
The patent modifies the viscosity and consistency parameters of the polymer-based coating by controlling filler content and using polysiloxane as the base polymer. This allows the coating to be applied by spraying while maintaining adequate adhesion properties after curing
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 composition exhibits improved viscosimetric properties for easy application and significant fire-resistant effects, maintaining attachment and heat resistance with low filler levels, as demonstrated by temperature tests and viscosity measurements.
Implementation Method 1
delay the heating up of the metal part that it protects as much as possible
Implementation Method 2
carbon nanotubes be incorporated into the polymer
Implementation Method 3
filled with a substance likely to react to the heat and to form a passivation layer protecting the metal parts from a too fast heating
Implementation Method 4
The composition according to the invention has surprising viscosimetric and fire-resistant properties
Data Source
AI summary
The present invention concerns a fireproof composition consisting of reticulated polysiloxane and raw carbon nanotubes with a “bound rubber” value greater than or equal to 15 grams of carbon nanotube, said carbon nanotubes representing between 0.05 and 1% of the total weight of said composition.