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/ | ||||||||||||
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Document Type: | Article | ||||||||||||
Title: | Aerogel–aerogel composites for normal temperature range thermal insulations | ||||||||||||
Authors: |
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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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