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From Fragile to Resilient Insulation: Synthesis and Characterization of Aramid-Honeycomb Reinforced Silica Aerogel Composite Materials

Schwan, Marina and Rößler, Matthias and Milow, Barbara and Ratke, Lorenz (2016) From Fragile to Resilient Insulation: Synthesis and Characterization of Aramid-Honeycomb Reinforced Silica Aerogel Composite Materials. Gels, 2 (1). Multidisciplinary Digital Publishing Institute (MDPI). DOI: doi:10.3390/gels2010001 ISSN 2310-2861

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Abstract

The production of a new composite material embedding aramid honeycomb materials into nano-porous silica aerogels is studied. Our aim is to improve the poor mechanical strength of silica aerogels by aramid honeycombs without losing the amazing properties of the aerogels like little density and low thermal conductivity. The composite materials were prepared using two formulations of silica aerogels in combination with aramid honeycomb materials of different cell sizes. The silica aerogels are prepared using silicon alkoxides methyltrimethoxysilane and tetraethylorthosilicate as precursors in a two-step acid–base sol–gel process. Shortly in advance of the gelation point, the aramid honeycombs were fluted by the sol, gelation occurred and, after the aging process, the gel bodies were supercritically dried. The properties of the received composite materials are satisfying. Even the thermal conductivities and the densities are a bit higher than for pure aerogels. Most importantly, the mechanical strength is improved by a factor of 2.3 compared to aramid honeycomb materials and by a factor of 10 compared to the two silica aerogels themselves. The composite materials have a good prospective to be used as an impressive insulation material.

Item URL in elib:https://elib.dlr.de/112372/
Document Type:Article
Title:From Fragile to Resilient Insulation: Synthesis and Characterization of Aramid-Honeycomb Reinforced Silica Aerogel Composite Materials
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schwan, Marinamarina.schwan (at) dlr.deUNSPECIFIED
Rößler, Matthiasmatthias.roessler (at) rwth-aachen.deUNSPECIFIED
Milow, BarbaraBarbara.Milow (at) dlr.deUNSPECIFIED
Ratke, Lorenzlorenz.ratke (at) dlr.deUNSPECIFIED
Date:2016
Journal or Publication Title:Gels
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:No
In ISI Web of Science:No
Volume:2
DOI :doi:10.3390/gels2010001
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
ISSN:2310-2861
Status:Published
Keywords:Silica Aerogel, Aramidwaben-Verbundwerkstoff
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:17 May 2017 13:43
Last Modified:08 Mar 2018 18:38

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