Tough polymer aerogels incorporating a conformal inorganic coating for low flammability and durable hydrophobicity
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Both inorganic and polymeric aerogels are well-known in the materials field. Inorganic aerogels are generally susceptible to brittle fracture, while polymeric aerogels tend to exhibit low modului and high flammability. To overcome these disadvantages, we introduce a new approach to the design of aerogels. A microporous poly(vinyl alcohol) (PVA) aerogel/silica nanocomposite was prepared by growing a silica conformal coating onto a PVA aerogel scaffold. Such aerogel/silica nanocomposites show significant improvement in their mechanical properties over either individual component. The nanocomposites show excellent fire resistance since the silica conformal coating serves as a barrier for heat transfer and mass loss of the coated organic materials. After a fluorocarbon silane treatment, the nanocomposites also show durable superhydrophobicity.
CitationSun, H., Schiraldi, D.A., Chen, D., Wang, D., Sanchez-Soto, M. Tough polymer aerogels incorporating a conformal inorganic coating for low flammability and durable hydrophobicity. "ACS applied materials and interfaces", Maig 2016, vol. 8, núm. 20, p. 13051-13057.
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