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Structural Investigations on resorcinol-formaldehyde aerogels and carbon aerogels by means of holotomography

Tannert, René and Schwan, Marina and Rege, Ameya and Cesar da Silva, Julio and Eggeler, Mario and Bartsch, Marion and Milow, Barbara and Ratke, Lorenz and Itskov, Mikhail (2016) Structural Investigations on resorcinol-formaldehyde aerogels and carbon aerogels by means of holotomography. In: Proceedings 3rd International Seminar on Aerogels, p. 112. 3rd International Seminar on Aerogels, 22.-23. Sep. 2016, Sophia Antipolis, Frankreich. ISBN 978-2-905267-93-1.

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The visualization of the three-dimensional structure of aerogels and xerogels with sub-micrometer resolution remains a challenging task. Such information, however, would reveal the real shape and size of particles and pores within a hollow gel body and thus allow a validation (and potentially a correction) of methods such as the Barrett-Joyner-Halenda analysis for pore size distribution which are currently applied in the characterization of aerogels. This poster describes efforts to probe the structure of resorcinol-formaldehyde gels and carbonized derivatives by means of holotomography, a specific method that involves the treatment of samples with hard x-ray irradiation at different distances in order to compose the resulting two-dimensional images to a three-dimensional picture. The preparation of suitable samples, their treatment with synchrotron irradiation and the post-processing of images with a voxel size of 60 nanometers are described. Our first results show that both hard and soft organic and carbon gels are viable for holotomography and the hard synchrotron irradiation involved with that method. Furthermore, the relative order of pore sizes of hard and soft resorcinol-formaldehyde aerogels and analogous carbon gels was found to be in agreement with other characterization techniques.

Item URL in elib:https://elib.dlr.de/107005/
Document Type:Conference or Workshop Item (Poster)
Title:Structural Investigations on resorcinol-formaldehyde aerogels and carbon aerogels by means of holotomography
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Tannert, Renérene.tannert (at) dlr.dehttps://orcid.org/0000-0001-9484-8886
Schwan, Marinamarina.schwan (at) dlr.deUNSPECIFIED
Rege, AmeyaRWTH Aachenhttps://orcid.org/0000-0001-9564-5482
Cesar da Silva, JulioEuropean Synchroton Research FacilityUNSPECIFIED
Eggeler, MarioMario.Eggeler (at) dlr.deUNSPECIFIED
Bartsch, Marionmarion.bartsch (at) dlr.dehttps://orcid.org/0000-0002-3952-2928
Milow, Barbarabarbara.milow (at) dlr.deUNSPECIFIED
Ratke, Lorenzlorenz.ratke (at) dlr.dehttps://orcid.org/0000-0003-2487-4717
Itskov, MikhailRWTH AachenUNSPECIFIED
Date:22 September 2016
Journal or Publication Title:Proceedings 3rd International Seminar on Aerogels
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Page Range:p. 112
EditorsEmailEditor's ORCID iD
Smirnova, IrinaTU Hamburg-HarburgUNSPECIFIED
Keywords:aerogels tomography
Event Title:3rd International Seminar on Aerogels
Event Location:Sophia Antipolis, Frankreich
Event Type:international Conference
Event Dates:22.-23. Sep. 2016
Organizer:International Society for the Advancement of Supercritical Fluids
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 - NGC Fahrzeugstruktur (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Aerogele
Institute of Materials Research > Experimental and Numerical Methods
Deposited By: Tannert, Dr. René
Deposited On:04 Nov 2016 08:04
Last Modified:31 Jul 2019 20:04

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