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Mechanically strong and thermal insulating polyimide/SiO2 aerogel prepared by ambient drying.
- Source :
-
Materials Letters . Nov2022, Vol. 327, pN.PAG-N.PAG. 1p. - Publication Year :
- 2022
-
Abstract
- • Polyimide aerogels with nano-porous structure were prepared by ambient drying. • SiO 2 nanoparticles were used as skeleton enhancers and shrinkage inhibitors. • The aerogels exhibit robust mechanical properties and efficient thermal insulation. Ambient drying of polyimide (PI) aerogel is rarely reported due to the strong cross-linking network leading to large shrinkage. In this work, the hydrophobic SiO 2 nanoparticles are used as skeleton enhancers and shrinkage inhibitors to maintain the nano-porous network structure and achieve ambient drying of PI/SiO 2 aerogels. The results show that the PI/SiO 2 aerogel prepared by ambient drying has similar thermal insulation and mechanical properties as the PI aerogel prepared by supercritical drying. The PI/SiO 2 aerogel prepared by ambient drying is low-cost and simple to operate, which is expected to realize the industrialization and wide engineering application. [ABSTRACT FROM AUTHOR]
- Subjects :
- *AEROGELS
*DRYING
*POROUS materials
*THERMAL properties
*THERMAL insulation
Subjects
Details
- Language :
- English
- ISSN :
- 0167577X
- Volume :
- 327
- Database :
- Academic Search Index
- Journal :
- Materials Letters
- Publication Type :
- Academic Journal
- Accession number :
- 159056859
- Full Text :
- https://doi.org/10.1016/j.matlet.2022.133039