Universität zu Köln

Maleki, Hajar ORCID: 0000-0002-2813-4700, Fischer, Thomas, Bohr, Christoph ORCID: 0000-0002-8427-8346, Auer, Jaqueline, Mathur, Sanjay and Milow, Barbara (2021). Hierarchically Organized Biomimetic Architectured Silk Fibroin-Ceramic-Based Anisotropic Hybrid Aerogels for Thermal Energy Management. Biomacromolecules, 22 (4). S. 1739 - 1752. WASHINGTON: AMER CHEMICAL SOC. ISSN 1526-4602

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Abstract

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 (SF) biopolymer extracted from Bombyx 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 three-dimensional sepiolite (Mg2H2Si3O9.xH(2)O), MXene (Ti3C2TX), and silica nanostructures inside the self-assembled SF biopolymer and subsequent uni-directional freeze-casting and drying the resulted hydrogels, composites with aerogel features were obtained. The obtained aerogels possess low bulk density (rho(b) = 0.059-0.090 g cm(-3)), low thermal conductivities (lambda = 0.035-0.042 W m(-1) K-1), and high thermal stability (up to similar to 260 degrees C) with multi-modal lamella-bridge porous microstructures found in the cuttlefish bone structure. In addition, the intriguing anisotropy in the X-AeroSF composite 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 Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Maleki, Hajar UNSPECIFIED orcid.org/0000-0002-2813-4700 UNSPECIFIED Fischer, Thomas UNSPECIFIED UNSPECIFIED UNSPECIFIED Bohr, Christoph UNSPECIFIED orcid.org/0000-0002-8427-8346 UNSPECIFIED Auer, Jaqueline UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, Sanjay UNSPECIFIED UNSPECIFIED UNSPECIFIED Milow, Barbara UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-579182
DOI:	10.1021/acs.biomac.1c00175
Journal or Publication Title:	Biomacromolecules
Volume:	22
Number:	4
Page Range:	S. 1739 - 1752
Date:	2021
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	1526-4602
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SILICA Multiple languages Biochemistry & Molecular Biology; Chemistry, Organic; Polymer Science Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/57918