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Synthesis and Properties of Flexible Silica Aerogels as a Precursor for Si-O-C Aerogels

Niemeyer, Philipp (2012) Synthesis and Properties of Flexible Silica Aerogels as a Precursor for Si-O-C Aerogels. Bachelorarbeit, RWTH Aachen.

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Kurzfassung

This bachelor thesis is about the production of flexible aerogels as a precursor for Si-O-C aerogels. Two organo-modified silica sources, MTMS and GPTMS, as well as a coupling agent were chosen for reaction. The first part deals with the synthesis and characterization of flexible MTMS/GPTMS aerogels. Well known compositions of MTMS, GPTMS and DETA become flexible by the use of certain amounts of water and methanol. The procedure of preparing the gels as well as washing and drying is described. Two series of samples were produced. One had a higher content of water and the other had a higher content of methanol. After supercritical drying the aerogels obtained were characterized. Specific surface area, density, Young's modulus and microstructure are a few of the properties measured. The second part deals with the pyrolysis and the characterization of the pyrolyzed samples. Again specific surface area, density, Young's modulus, microstructure and other properties were measured. FTIR spectra were taken trying to determine the chemical bonds of the pyrolyzed aerogels.

Dokumentart:Hochschulschrift (Bachelorarbeit)
Titel:Synthesis and Properties of Flexible Silica Aerogels as a Precursor for Si-O-C Aerogels
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Niemeyer, PhilippNICHT SPEZIFIZIERT
Datum:November 2012
Seitenanzahl:58
Status:veröffentlicht
Stichwörter:Aerogel, Flexibility, density, specific surface area, MTMS, GPTMS
Institution:RWTH Aachen
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Verkehr
HGF - Programmthema:Bodengebundener Verkehr
DLR - Schwerpunkt:Verkehr
DLR - Forschungsgebiet:V BF - Bodengebundene Fahrzeuge
DLR - Teilgebiet (Projekt, Vorhaben):V - Projekt Neuartige Fahrzeugstrukturen (alt)
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Materialphysik im Weltraum
Hinterlegt von: Prof. Lorenz Ratke
Hinterlegt am:14 Nov 2012 13:36
Letzte Änderung:14 Nov 2012 13:36

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