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Synthesis and Characterization of Resorcinol-Formaldehyde (RF) and Carbon Aerogel Microbeads by Dropping Method

Anklam, Thomas (2021) Synthesis and Characterization of Resorcinol-Formaldehyde (RF) and Carbon Aerogel Microbeads by Dropping Method. Master's, Universität zu Köln.

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Resorcinol formaldehyde (RF) aerogel microbeads have been shown to improve the quality of metal castings when mixed with the casting sand. Reports for the production of RF aerogel microbeads mostly involve emulsion gelation methods, which have the disadvantage of a complicated upscaling of the synthesis. Hence, the aim of this work is to investigate the synthesis conditions of RF aerogel microbeads with a dropping method. Xanthan gum (XG) was added to a RF sol to increase its viscosity. A XG containing base-catalyzed pre-gelled sol was then dropped into hydrochloric acid to induce rapid gelation of the droplets. After ambient drying the gels were fully characterized concerning their size, bulk and skeletal densities, porosities, surface area, pore size distribution, IR spectra and microstructure. The here described reaction parameters can in future be transferred to a mechanical JetCutter for easy upscaling of the process.

Item URL in elib:https://elib.dlr.de/146269/
Document Type:Thesis (Master's)
Title:Synthesis and Characterization of Resorcinol-Formaldehyde (RF) and Carbon Aerogel Microbeads by Dropping Method
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Anklam, ThomasUNSPECIFIEDhttps://orcid.org/0000-0002-3192-907XUNSPECIFIED
Date:19 February 2021
Refereed publication:No
Open Access:Yes
Number of Pages:69
Keywords:Resorcinol-Formaldehyd, Dropping Method, Aerogel, Xanthan Gum
Institution:Universität zu Köln
Department:Institut für Anorganische Chemie
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Road Transport
DLR - Research area:Transport
DLR - Program:V ST Straßenverkehr
DLR - Research theme (Project):V - NGC Fahrzeugstruktur II (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Aerogels and Aerogel Composites
Deposited By: Anklam, Thomas
Deposited On:03 Dec 2021 11:48
Last Modified:31 Dec 2022 03:00

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