期刊
NANO LETTERS
卷 20, 期 5, 页码 3828-3835出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.0c00917
关键词
Energy sustainability; Anisotropic thermal insulation; Flexibility; Manufacturing
类别
资金
- U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy (EERE) under the Building Technology Office (BTO) Award [DE-EE0008675]
- Building Technologies Office, Energy Efficiency and Renewable Energy (EERE) of the US Department of Energy [DE-AC05-00OR22725]
- UT Battelle, LLC
- U.S. Department of Energy, Office of Science [DE-AC02-06CH11357]
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/cm(3), 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 degrees. 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.
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