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/ | |||||||||||||||||||||||||||
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Document Type: | Article | |||||||||||||||||||||||||||
Title: | Fabrication of Mechanically Strong Honeycombs with Aerogel Cores | |||||||||||||||||||||||||||
Authors: |
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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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