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Fabrication of Mechanically Strong Honeycombs with Aerogel Cores

White, Lauren S. and Selden, Tylor and Bertino, Massimo F. and Cartin, Charles and Angello, Joseph and Schwan, Marina and Milow, Barbara and Ratke, Lorenz (2018) Fabrication of Mechanically Strong Honeycombs with Aerogel Cores. Industrial & Engineering Chemistry Research, 75 (4), pp. 1197-1206. American Chemical society (ACS). DOI: 10.1021/acs.iecr.7b04058 ISSN 0888-5885

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Official URL: https://doi.org/10.1021/acs.iecr.7b04058

Abstract

Honeycomb aerogel composites were fabricated by reinforcing selected regions of a native aerogel matrix using photopolymerization. First, alcogels were synthesized by hydrolysis-condensation of a siloxane, and by adding a multifunctional acrylic monomer and a visible-light initiator to the gelation solution. Alcogels were then placed on a programmable translation stage and exposed to a laser. Polymerization, and mechanical reinforcement were induced in the exposed regions. After exposure alcogels were dried supercritically. Thermal conductivity and out-of-plane modulus of the resulting honeycombs could be varied between values typical of native aerogels (11 mW/mK and 0.75 MPa) and those of uniformly polymerized composites (65.8 mW/mK and 36.26 MPa) by varying the translation stage speed between 2 and 3 mm/s. The results were interpreted using a rule-of-mixtures model. The mechanical properties of the composites were also investigated using finite element analysis.

Item URL in elib:https://elib.dlr.de/120035/
Document Type:Article
Title:Fabrication of Mechanically Strong Honeycombs with Aerogel Cores
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
White, Lauren S.UNSPECIFIEDUNSPECIFIED
Selden, TylorUNSPECIFIEDUNSPECIFIED
Bertino, Massimo F.mfbertino (at) vcu.eduUNSPECIFIED
Cartin, CharlesUNSPECIFIEDUNSPECIFIED
Angello, JosephUNSPECIFIEDUNSPECIFIED
Schwan, MarinaMarina.Schwan (at) dlr.deUNSPECIFIED
Milow, BarbaraBarbara.Milow (at) dlr.dehttps://orcid.org/0000-0002-6350-7728
Ratke, LorenzLorenz.Ratke (at) dlr.deUNSPECIFIED
Date:2018
Journal or Publication Title:Industrial & Engineering Chemistry Research
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:75
DOI :10.1021/acs.iecr.7b04058
Page Range:pp. 1197-1206
Publisher:American Chemical society (ACS)
ISSN:0888-5885
Status:Published
Keywords:aerogels honeycomb, mechanical strength, termical conductivity
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:20 Jun 2018 10:19
Last Modified:20 Jun 2018 10:19

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