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The effect of embedding highly insulating granular aerogel in cellulosic aerogel

Laskowski, Jessica and Milow, Barbara and Ratke, Lorenz (2015) The effect of embedding highly insulating granular aerogel in cellulosic aerogel. The Journal of Supercritical Fluids, 106, pp. 93-99. Elsevier. DOI: 10.1016/j.supflu.2015.05.011 ISSN 0896-8446

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Abstract

We investigate aerogel–aerogel composites to develop new materials for thermal insulation applications with reduced fragility and without release of dust. Two different kinds of highly insulating silica aerogels (SiO2) were embedded into a cellulosic aerogel: a high-density (0.25 g/cm3) tetramethylorthosilicate (TMOS) based and a low-density (0.15 g/cm3) waterglass based hydrophilic granular silica aerogel which are added to the salt hydrate melt of 59 wt.% calcium thiocyanate and 2 or 3 wt.% of cellulose during the synthesis of a cellulosic aerogel. The silica aerogel species show a different behavior regarding the interaction with the cellulose network in the composite examined by scanning electron microscopy. With the synthesis method we were able to produce non-fragile aerogel–aerogel composites and a strong stiffening effect regarding Young’s modulus was achieved compared to pure aerogels. Density obtained is 0.04–0.15 g/cm3 and thermal conductivity reached is between 0.04–0.05 W/mK.

Item URL in elib:https://elib.dlr.de/97789/
Document Type:Article
Additional Information:referierter Artikel
Title:The effect of embedding highly insulating granular aerogel in cellulosic aerogel
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:May 2015
Journal or Publication Title:The Journal of Supercritical Fluids
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:106
DOI :10.1016/j.supflu.2015.05.011
Page Range:pp. 93-99
Publisher:Elsevier
ISSN:0896-8446
Status:Published
Keywords:Verbundwerkstoffe; Wärmedämmung
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: Laskowski, Jessica
Deposited On:17 Sep 2015 07:33
Last Modified:08 Mar 2018 18:37

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