Preceramic Polymer Grafted Nanoparticles for Shrinkage Control
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Solution Overview
Problem
Current preceramic polymers exhibit undesirable porosity, cracking, and outgassing when processed into materials, limiting their thickness and application range due to excess shrinkage and material instability.
Innovation Solution
Combining a preceramic polymer with an inorganic core to minimize shrinkage issues and achieve improved properties such as reduced outgassing, morphology control, and distinct rheological properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If current preceramic polymers are used and processed into materials, then the materials can be formed with various shapes and compositions, but the materials exhibit undesirable porosity, cracking and outgassing
Solution Approach 1:
The patent applies composite materials by combining preceramic polymer with inorganic core nanoparticles to create a hybrid system. The inorganic core provides structural stability and reduces porosity and cracking, while the polymer matrix maintains chemical versatility and processability, resolving the contradiction between adaptability and reliability
Solution Approach 2:
The patent changes the physical and chemical parameters of the preceramic polymer system by controlling molecular weight, crosslinking density, and inorganic particle concentration. These parameter adjustments optimize the balance between material versatility and defect reduction, eliminating porosity and cracking while preserving chemical composition range
2Manufacturing precision
If current preceramic polymers are processed into materials, then materials can be manufactured with desired compositions, but excess shrinkage and material instability require additional processing steps
Solution Approach 1:
The patent applies preliminary action by incorporating inorganic core nanoparticles into the preceramic polymer matrix before processing. This pre-combination stabilizes the material against shrinkage and instability during subsequent processing, eliminating the need for additional corrective processing steps while maintaining desired morphology control
3Length of stationary object
If current preceramic polymers are used to make thicker materials, then more substantial components can be produced, but material instability and shrinkage limit the achievable thickness
Solution Approach 1:
The patent uses composite materials with inorganic core nanoparticles dispersed in the preceramic polymer matrix to produce thicker components. The inorganic cores act as structural support that prevents excessive shrinkage and stabilizes the composition during processing, enabling production of thicker materials while maintaining compositional stability
Data Source
AI summary
The present invention relates to preceramic polymer grafted nanoparticles and as well as methods of making and using same. Advantages of such preceramic polymer grafted nanoparticles include, reduced out gassing, desired morphology control and desirable, distinct rheological properties that are not found in simple mixtures. As a result, Applicants' preceramic polymer grafted nanoparticles can be used to provide significantly improved, items including but not limited to hypersonic vehicles, jets, rockets, mirrors, signal apertures, furnaces, glow plugs, brakes, and armor.