Tailoring Mechanical Properties of Aerogels for Aerospace Applications
Abstract
Silica aerogels are highly porous solid materials consisting of three-dimensional networks of silica particles and are typically obtained by removing the liquid in silica gels under supercritical conditions. Several unique attributes such as extremely low thermal conductivity and low density make silica aerogels excellent candidates in the quest for thermal insulation materials used in space missions. However, native silica aerogels are fragile at relatively low stresses. More durable aerogels with higher strength and stiffness are obtained by proper selection of silane precursors and by reinforcement with polymers. This paper first presents a brief review of the literature on methods of silica aerogel reinforcement and then discusses our recent activities in improving not only the strength but also the elastic response of polymer-reinforced silica aerogels. Several alkyl-linked bis-silanes were used in promoting flexibility of the silica networks in conjunction with polymer reinforcement by epoxy.
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Aerogels are characterized by large porosity, often above 80 vol%, and specific surface area of about 100-1000 m2/g.
“Aerogels, characterized by their large porosity (often above 80 vol%) and specific surface area (about 100–1000 m2/g), have been synthesized in diverse compositions, and their applications have been investigated, including their thermal insulation, energy storage, catalytic features, environmental remediation, and aerospace applications [11,12].”
From Silica Aerogels as a Promising Vehicle for Effective Water Splitting for Hydrogen Production (2025) · cites this paper as [12]
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- Authors
- Randall, J. P., Meador, M. A. B., & Jana, S. C.
- Affiliations
- University of Akron (US)
- Glenn Research Center (US)
- Corresponding author
- Meador, Mary Ann B.
- Jana, Sadhan C.
- Venue
- ACS Applied Materials & Interfaces
- Publisher
- American Chemical Society (ACS)
- Published
- 2011-03-01
- Volume
- 3
- Issue
- 3
- Pages
- 613-626
- ISSN
- 1944-8244 (ISSN-L)
- 1944-8252
- OpenAlex
- W2328799674
- Cited by
- 579
- References
- 78
- Citations by year
- 2026: 26 · 2025: 30 · 2024: 40 · 2023: 56 · 2022: 46 · 2021: 51 · 2020: 54 · 2019: 51 · 2018: 46 · 2017: 48 · 2016: 38 · 2015: 33 · 2014: 23 · 2013: 21 · 2012: 11
- FWCI
- 8.70
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- ACS Applied Materials & Interfaces (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Chemistry › Spectroscopy › Aerogels and thermal insulation
- Physical Sciences › Materials Science › Ceramics and Composites › Advanced ceramic materials synthesis
- Physical Sciences › Materials Science › Materials Chemistry › Silicone and Siloxane Chemistry
- Keywords
- silica aerogel, mechanical properties, polymer reinforcement, epoxy resin, thermal insulation, space missions, supercritical drying, silane precursor, stiffness and strength, elastic response
- MeSH terms
- Air, Aviation, Gels, Manufactured Materials, Silicon Dioxide, Tensile Strength, Compressive Strength, Elastic Modulus
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