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Hierarchically organized biomimetic architectured silk fibroin-ceramic based anisotropic hybrid aerogels for thermal energy management

Maleki, Hajar and Fischer, Thomas and Bohr, Christoph and Auer, Jaqueline and Mathur, Sanjay and Milow, Barbara (2021) Hierarchically organized biomimetic architectured silk fibroin-ceramic based anisotropic hybrid aerogels for thermal energy management. Biomacromolecules. American Chemical Society (ACS). doi: 10.1021/acs.biomac.1c00175. ISSN 1526-4602.

[img] PDF - Postprint version (accepted manuscript)

Official URL: https://pubs.acs.org/doi/pdf/10.1021/acs.biomac.1c00175


Due to the current energy crises, the search for thermal energy management systems based on thermal insulating porous materials has drawn a significant deal of attention. Herein, we demonstrated the thermal insulation and management capabilities of cuttlefish bone mimetic aerogels with hierarchically organized porous structures directly fabricated from surface modified and self-assembled silk fibroin biopolymer extracted from b. Mori silkworm cocoon biomass hereafter, the materials developed referred to as X-AeroSF. Exploiting from creating an interpenetrating network of the secondary ceramic components of various one, two, and threedimensional sepiolite (Mg2H2Si3O9.xH2O), MXene (Ti3C2TX) and silica nanostructures inside the self-assembled silk fibroin biopolymer and subsequent uni-directional freeze-casting and drying the resulted hydrogels, composites with aerogel feature were obtained. The obtained aerogels possess low bulk density (0.059-0.090 g cm-3), low thermal conductivities (0.035-0.042 W m-1 K-1), and high thermal stability (up to ~ 260 °C) with multi-modal lamella-bridge porousmicrostructures found in the cuttlefish bone structure. In addition, the intriguing anisotropy in the X-AeroSF composites porous structure enables thermal dissipation along with the aligned pore directions, thus decreasing the local overheating on the heated side. As a result, an improvement in thermal insulation in the perpendicular direction with respect to the pore lamellae was obtained. Therefore, the exquisite thermal energy management, biodegradability, low bulk density, fire resistivity, together with possible manufacture scalability of X-AeroSF composite, make this material attractive for future practical applications

Item URL in elib:https://elib.dlr.de/141193/
Document Type:Article
Title:Hierarchically organized biomimetic architectured silk fibroin-ceramic based anisotropic hybrid aerogels for thermal energy management
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Maleki, HajarUNSPECIFIEDhttps://orcid.org/0000-0002-2813-4700UNSPECIFIED
Fischer, ThomasUniversity of CologneUNSPECIFIEDUNSPECIFIED
Bohr, ChristophUniversity of Colognehttps://orcid.org/0000-0002-8427-8346UNSPECIFIED
Auer, JaquelineUniversity of Applied Sciences Upper AustriaUNSPECIFIEDUNSPECIFIED
Milow, BarbaraUNSPECIFIEDhttps://orcid.org/0000-0002-6350-7728UNSPECIFIED
Date:9 March 2021
Journal or Publication Title:Biomacromolecules
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Publisher:American Chemical Society (ACS)
Keywords:Aerogels bioinspired materials thermal energy management thermal insulation, composites
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Road Transport
DLR - Research area:Transport
DLR - Program:V ST Straßenverkehr
DLR - Research theme (Project):V - NGC Fahrzeugstruktur II (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Aerogels and Aerogel Composites
Deposited By: Heinrich, Dr. Charlotte
Deposited On:09 Mar 2022 08:06
Last Modified:04 Dec 2023 12:41

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