An All-Ceramic, Anisotropic, and Flexible Aerogel Insulation Material
| Autor: | Yulong Huang, Shenqiang Ren, Donghui Zhao, Zheng Li, Andre Omer Desjarlais, Yong Hu, Zefan Shao, Jason N. Armstrong, Changning Li, Karen L. Hanson, Hamilton Jason M, Lu An, Donald Petit, Mauricio Souza, Yuzi Liu, Jieyu Wang |
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| Rok vydání: | 2020 |
| Předmět: |
Superinsulation
Materials science business.industry Mechanical Engineering Composite number Bioengineering Aerogel 02 engineering and technology General Chemistry engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Contact angle Thermal conductivity Coating Thermal insulation visual_art engineering visual_art.visual_art_medium General Materials Science Ceramic Composite material 0210 nano-technology business |
| Zdroj: | Nano Letters. 20:3828-3835 |
| ISSN: | 1530-6992 1530-6984 |
| DOI: | 10.1021/acs.nanolett.0c00917 |
| Popis: | To exploit the high-temperature superinsulation potential of anisotropic thermal management materials, the incorporation of ceramic aerogel into the aligned structural networks is indispensable. However, the long-standing obstacle to exploring ultralight superinsulation ceramic aerogels is the inaccessibility of its mechanical elasticity, stability, and anisotropic thermal insulation. In this study, we report a recoverable, flexible ceramic fiber-aerogel composite with anisotropic lamellar structure, where the interfacial cross-linking between ceramic fiber and aerogel is important in its superinsulation performance. The resulting ultralight aerogel composite exhibits a density of 0.05 g/cm3, large strain recovery (over 50%), and low thermal conductivity (0.0224 W m-1 K-1), while its hydrophobicity is achieved by in situ trichlorosilane coating with the water contact angle of 135°. The hygroscopic tests of such aerogel composites demonstrate a reversible thermal insulation. The mechanical elasticity and stability of the anisotropic composites, with its soundproof performance, shed light on the low-cost superelastic aerogel manufacturing with scalability for energy saving building applications. |
| Databáze: | OpenAIRE |
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