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Polyimide aerogel thin films
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Meador, Mary Ann Guo, Haiquan |
| Copyright Year | 2012 |
| Description | Polyimide aerogels have been crosslinked through multifunctional amines. This invention builds on "Polyimide Aerogels With Three-Dimensional Cross-Linked Structure," and may be considered as a continuation of that invention, which results in a polyimide aerogel with a flexible, formable form. Gels formed from polyamic acid solutions, end-capped with anhydrides, and cross-linked with the multifunctional amines, are chemically imidized and dried using supercritical CO2 extraction to give aerogels having density around 0.1 to 0.3 g/cubic cm. The aerogels are 80 to 95% porous, and have high surface areas (200 to 600 sq m/g) and low thermal conductivity (as low as 14 mW/m-K at room temperature). Notably, the cross-linked polyimide aerogels have higher modulus than polymer-reinforced silica aerogels of similar density, and can be fabricated as both monoliths and thin films. |
| File Size | 93109 |
| Page Count | 1 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20120011884 |
| Archival Resource Key | ark:/13960/t3kx0d50d |
| Language | English |
| Publisher Date | 2012-07-01 |
| Access Restriction | Open |
| Subject Keyword | Nonmetallic Materials Aerogels Thin Films Fabrication Porous Materials Polyimides Thermal Conductivity Low Conductivity Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
