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Design and Performance Comparison of Polymer-Derived Ceramic Ambigels and Aerogels.

ABSTRACT: This work reports the synthesis and characterization of preceramic- and polymer-derived SiOC aerogels obtained from a commercial siloxane resin. The preceramic aerogels were obtained by ambient pressure drying (ambigels) and CO₂ supercritical drying. Despite different drying processes, the final ceramic ambi/aerogels have very similar microstructural features in density, porosity, pore size, and specific surface area. Both materials have shown promising results for oil sorption and water cleaning. Supercritically dried-SiOC aerogel had low thermal conductivity with 0.046 W·m^-1·K^-1 at RT and 0.073 W·m^-1·K^-1 at 500 °C. These results suggest that substituting the rather complicated and expensive CO₂-SC drying with the more friendly and cheap ambient pressure drying can be done without having to accept significant microstructural/property degradation.

SUBMITTER: Icin O

PROVIDER: S-EPMC10500666 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature

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Design and Performance Comparison of Polymer-Derived Ceramic Ambigels and Aerogels.

Icin Oyku O Semerci Tugce T Soraru Gian Domenico GD Vakifahmetoglu Cekdar C

ACS omega 20230828 36

This work reports the synthesis and characterization of preceramic- and polymer-derived SiOC aerogels obtained from a commercial siloxane resin. The preceramic aerogels were obtained by ambient pressure drying (ambigels) and CO<sub>2</sub> supercritical drying. Despite different drying processes, the final ceramic ambi/aerogels have very similar microstructural features in density, porosity, pore size, and specific surface area. Both materials have shown promising results for oil sorption and wa ...[more]

PMID: 37720786

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