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Silica aerogel paper honeycomb composites for thermal insulations

Berkefeld, André and Heyer, Markus and Milow, Barbara (2017) Silica aerogel paper honeycomb composites for thermal insulations. Journal of Sol-Gel Science and Technology. Springer. ISSN 0928-0707

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Abstract

Applicability of super-insulating silica aerogel materials for thermal insulation is still restricted by limited mechanical strength. We report on a systematic improvement of silica aerogels in respect to shrinkage, density and thermal conductivity by varying sol gel parameters as the molar ratios of TEOS:EtOH:H2O or the hydrolysis time. The received silica aerogels can be combined with paper-based honeycomb structures to improve the mechanical strength. We success-fully manufactured such silica aerogel paper honeycomb composites. The challenges in the preparation are the must to prevent shrinkage of the silica aerogels during synthesis, to avoid cracks by supercritical drying, and to get a perfect bonding at the paper silica interface. The composite materials are characterized with respect to their compression modulus, thermal conductivity, and flammability.

Item URL in elib:https://elib.dlr.de/114557/
Document Type:Article
Title:Silica aerogel paper honeycomb composites for thermal insulations
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Berkefeld, Andréandre.berkefeld (at) dlr.deUNSPECIFIED
Heyer, Markusmarkus.heyer (at) dlr.dehttps://orcid.org/0000-0002-5180-0695
Milow, BarbaraBarbara.Milow (at) dlr.dehttps://orcid.org/0000-0002-6350-7728
Date:2017
Journal or Publication Title:Journal of Sol-Gel Science and Technology
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Publisher:Springer
ISSN:0928-0707
Status:Published
Keywords:Silica aerogel Paper honeycomb Composites Thermal insulation Mechanical properties
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
Deposited By: Milow, Dr. Barbara
Deposited On:10 Oct 2017 09:30
Last Modified:06 Sep 2019 15:15

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