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Conductive hydrogel composites with autonomous self-healing properties

Li, Xiaohui; Huang, Xia; Mutlu, Hatice; Malik, Sharali; Theato, Patrick

Abstract (englisch):
Conventional conductive hydrogels usually lack self-healing properties, but might be favorable for smart electronic applications. Therefore, we present the fabrication of conductive self-healing hydrogels that merge the merits of electrical conductivity and self-healing properties. The conductive self-healing hydrogel composite was prepared by using single-walled carbon nanotubes (SWCNTs), poly(vinyl alcohol) (PVA), and a poly(N,N-dimethyl acrylamide) copolymer derivative modified with pyrene and borate functional moieties. While the tethered pyrene groups of the copolymer facilitated an even dispersion of the conductive components, i.e., SWCNTs, in aqueous solution via π–π stacking, the hydrogel system was formed via covalent dynamic cross-linking through tetrahedral borate ion interaction with the –OH group of PVA. The hydrogel composites exhibited bulk conductivity (1.27 S m−1 with 8 mg mL−1 SWCNTs) with a fast and autonomous self-healing ability that restored 95% of the original conductivity within 10 s under ambient conditions. Accordingly, due to their outstanding properties, we postulate that these composites may have potential in biomedical applications, such as tissue engineering, wound healing or electronic skins.

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Originalveröffentlichung
DOI: 10.1039/d0sm01234c
Zugehörige Institution(en) am KIT Institut für Biologische Grenzflächen (IBG)
Institut für Quantenmaterialien und -technologien (IQMT)
Institut für Technische Chemie und Polymerchemie (ITCP)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 20.10.2020
Sprache Englisch
Identifikator ISSN: 1744-683X, 1744-6848
KITopen-ID: 1000126387
HGF-Programm 43.21.01 (POF III, LK 01) Quantum Correlations in Condensed Matter
Erschienen in Soft matter
Vorab online veröffentlicht am 15.10.2020
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