Universität zu Köln

Abadi, Mohsen Bandar, Weissing, Rene, Wilhelm, Michael ORCID: 0000-0002-4764-6955, Demidov, Yan, Auer, Jaqueline, Ghazanfari, Samaneh ORCID: 0000-0001-8177-7521, Anasori, Babak, Mathur, Sanjay and Maleki, Hajar ORCID: 0000-0002-2813-4700 (2021). Nacre-Mimetic, Mechanically Flexible, and Electrically Conductive Silk Fibroin-MXene Composite Foams as Piezoresistive Pressure Sensors. ACS Appl. Mater. Interfaces, 13 (29). S. 34996 - 35008. WASHINGTON: AMER CHEMICAL SOC. ISSN 1944-8252

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Abstract

The hierarchical nacre-like three-dimensional (3D) assembly of porous and lightweight materials is in high demand for applications such as sensors, flexible energy storage and harvesting devices, electromagnetic interference shielding, and biomedical applications. However, designing such a biomimetic hierarchical architecture is highly challenging due to the lack of experimental approaches to achieve the necessary control over the materials' microstructure on the multilength scale. Aerogels and foam-based materials have recently been developed as attractive candidates for pressure-sensing applications. However, despite recent progress, the bottleneck for these materials to achieve electrical conductivity combined with high mechanical flexibility and fast strain recovery remains. In this study, for the first time, inspired by the multiscale architecture of nacre, we fabricated a series of ultralightweight, flexible, electrically conductive, and relatively high-strength composite foams through hybridizing the cross-linked silk fibroin (SF) biopolymer, extracted from Bombyx mori silkworm cocoon, reinforced with two-dimensional graphene oxide (GO) and Ti3C2 MXene nanosheets. Nacre is a naturally porous material with a lightweight, mechanically robust network structure, thanks to its 3D interconnected lamella-bridge micromorphology. Inspired by this material, we assemble a cross-linked SF fibrous solution with MXene and GO nanosheets into nacre-like architecture using a bidirectional freeze-casting technique. Subsequent freeze-drying and gas-phase hydrophobization resulted in composite foams with 3D hierarchical porous architectures with a unique combination of mechanical resilience, electrical conductance, and ultra-lightness. The developed composite presented excellent performances as piezoresistive pressure-sensing devices and sorbents for oil/water separation, which indicated great potential in mechanically switchable electronics.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Abadi, Mohsen Bandar UNSPECIFIED UNSPECIFIED UNSPECIFIED Weissing, Rene UNSPECIFIED UNSPECIFIED UNSPECIFIED Wilhelm, Michael UNSPECIFIED orcid.org/0000-0002-4764-6955 UNSPECIFIED Demidov, Yan UNSPECIFIED UNSPECIFIED UNSPECIFIED Auer, Jaqueline UNSPECIFIED UNSPECIFIED UNSPECIFIED Ghazanfari, Samaneh UNSPECIFIED orcid.org/0000-0001-8177-7521 UNSPECIFIED Anasori, Babak UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, Sanjay UNSPECIFIED UNSPECIFIED UNSPECIFIED Maleki, Hajar UNSPECIFIED orcid.org/0000-0002-2813-4700 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-595989
DOI:	10.1021/acsami.1c09675
Journal or Publication Title:	ACS Appl. Mater. Interfaces
Volume:	13
Number:	29
Page Range:	S. 34996 - 35008
Date:	2021
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	1944-8252
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language THERMAL INSULATION; CARBON AEROGEL; LIGHTWEIGHT; SURFACE Multiple languages Nanoscience & Nanotechnology; Materials Science, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/59598