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Gel-Phase processing and solvent exchange

Publikationstyp
Book Part
Date Issued
2023-10-01
Sprache
English
Author(s)
Griffin, Justin S.  
Nelson, Ryan T.
Gurikov, Pavel  
Entwicklung und Modellierung Neuartiger Nanoporöser Materialien V-EXK2  
Smirnova, Irina  orcid-logo
Thermische Verfahrenstechnik V-8  
Steiner, Stephen A.  
TORE-URI
https://hdl.handle.net/11420/44264
Volume
Part F1485
Start Page
71
End Page
92
Citation
in: Aegerter, M., Leventis, N., Koebel, M., Steiner, S. (eds) Handbook of Aerogels (2023)
Publisher DOI
10.1007/978-3-030-27322-4_3
Scopus ID
2-s2.0-85175197963
Publisher
Springer
Is Part Of
isbn:978-3-030-27321-7
Several important unit operations involved in aerogel production pertain to the formation and processing of gels. Formation of a gel typically occurs in a mold, and accordingly, important considerations should be given to gel molding. Furthermore, after a gel has been formed, additional processing steps are typically required before its pore fluid can be removed to produce an aerogel. Such steps include aging of the gel to strengthen its solid-phase backbone, diffusion-mediated replacement of its pore fluid with a target solvent to compatibilize the gel for drying, and optional liquid-phase chemical treatment(s), for example, to impart hydrophobicity, introduce a desired functionality, or increase strength. This chapter discusses important unit operations including molding and demolding, aging, and solvent exchange, as well as examples of liquid-phase chemical treatments used to prepare various functional aerogels.
Subjects
Aging
Demolding
Functionalization
Gel-phase processing
Molding
Polymer crosslinking
Solvent exchange
DDC Class
620: Engineering
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