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Aerogel–aerogel composites for normal temperature range thermal insulations

Laskowski, Jessica and Milow, Barbara and Ratke, Lorenz (2016) Aerogel–aerogel composites for normal temperature range thermal insulations. Journal of Non-Crystalline Solids, 441 (1), pp. 42-48. Elsevier. DOI: doi:10.1016/j.jnoncrysol.2016.03.020 ISSN 0022-3093

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Abstract

Aerogel–aerogel composites are prepared by embedding highly insulating granular silica aerogel (1–2 mm, 5–58 vol.%) into ambient pressure dried resorcinol-formaldehyde (RF) aerogel. The organic RF aerogel matrix is synthesized via a sol–gel reaction of resorcinol (1,3-dihydroxybenzene) and formaldehyde in deionized water with Na2CO3 as the catalyst. Plates around 90 × 195 mm² with a thickness of 19–25 mm are obtained and can be processed for application by sawing and grinding. A theoretical model for the volume-based surface area was used to show that the matrix aerogel around the silica aerogel grains is affected by their presence. Composites have a density 0.19 ≤ ρ ≤ 0.27 g/cm³ and a thermal conductivity at room temperature between 0.026 and 0.053 W/mK. Composites can be used as thermal insulation material in a normal temperature range b 200 °C due to the decomposition of the organic phase above 200 °C.

Item URL in elib:https://elib.dlr.de/103860/
Document Type:Article
Title:Aerogel–aerogel composites for normal temperature range thermal insulations
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Laskowski, JessicaJessica.Laskowski (at) dlr.deUNSPECIFIED
Milow, BarbaraBarbara.Milow (at) dlr.deUNSPECIFIED
Ratke, Lorenzlorenz.ratke (at) dlr.deUNSPECIFIED
Date:March 2016
Journal or Publication Title:Journal of Non-Crystalline Solids
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:441
DOI :doi:10.1016/j.jnoncrysol.2016.03.020
Page Range:pp. 42-48
Publisher:Elsevier
ISSN:0022-3093
Status:Published
Keywords:Aerogel–aerogel composite Resorcinol-formaldehyde aerogel Silica aerogel Thermal insulation
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: Schwan, Marina
Deposited On:22 Jun 2016 14:19
Last Modified:10 Jan 2019 15:48

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