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Citric Acid Catalyzed Organic Aerogels

Milow, Barbara and Ratke, Lorenz and Ludwig, Svenja (2012) Citric Acid Catalyzed Organic Aerogels. In: Proc. Seminar on Aerogels, pp. 155-165. ISASF. Seminar on Aerogels, 6.-7. Dez. 2012, Nancy, Frankreich. ISBN 978-2-905267-86-3

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Abstract

Organic aerogels based on resorcinol (R) and formaldehyde (F) using citric acid (CA) as a catalyst are synthesized via a sol-gel process and ambient pressure drying at a temperature of 80°C. The influence of the ratio resorcinol to catalyst (R/C) as well as variations of the mole fraction of water at constant ratio of R to F (R/F) on gelation time and the morphology of the monolithic aerogel samples is studied. The molar ratio of resorcinol to formaldehyde is kept at 1:1.3. The molar ratio of resorcinol to catalyst (R/C) is varied between 15 and 1429 and the molar ratio of resorcinol to water (R/W) is between 0.01 and 0.05. The process limits of the RF aerogels are established and the aerogels are characterized with respect to density, particle size and specific surface area

Item URL in elib:https://elib.dlr.de/79678/
Document Type:Conference or Workshop Item (Paper, Poster)
Title:Citric Acid Catalyzed Organic Aerogels
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Milow, BarbaraUNSPECIFIEDUNSPECIFIED
Ratke, LorenzUNSPECIFIEDUNSPECIFIED
Ludwig, SvenjaUNSPECIFIEDUNSPECIFIED
Date:December 2012
Journal or Publication Title:Proc. Seminar on Aerogels
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 155-165
Editors:
EditorsEmail
Smirnova, I.TU-HH
Perrut, M.Separex
Publisher:ISASF
Series Name:Proceedings ISASF
ISBN:978-2-905267-86-3
Status:Published
Keywords:aerogel, citric acid, gel time, density
Event Title:Seminar on Aerogels
Event Location:Nancy, Frankreich
Event Type:Workshop
Event Dates:6.-7. Dez. 2012
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - Projekt Neuartige Fahrzeugstrukturen (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Ratke, Prof. Lorenz
Deposited On:14 Dec 2012 12:48
Last Modified:14 Dec 2012 12:48

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