title: "Click"-Triggered Self-Healing Graphene Nanocomposites.
abstract: Strategies to compensate material fatigue are among the most challenging issues, being most prominently addressed by the use of nano- and microscaled fillers, or via new chemical concepts such as self-healing materials. A capsule-based self-healing material is reported, where the adverse effect of reduced tensile strength due to the embedded capsules is counterbalanced by a graphene-based filler, the latter additionally acting as a catalyst for the self-healing reaction. The concept is based on "click"-based chemistry, a universal methodology to efficiently link components at ambient reaction conditions, thus generating a "reactive glue" at the cracked site. A capsule-based healing system via a graphene-based Cu2O (TRGO-Cu2O-filler) is used, acting as both the catalytic species for crosslinking and the required reinforcement agent within the material, in turn compensating the reduction in tensile strength exerted by the embedded capsules. Room-temperature self-healing within 48 h is achieved, with the investigated specimen containing TRGO-Cu2O demonstrating significantly faster self-healing compared to homogeneous (Cu(PPh3)3F, Cu(PPh3)3Br), and heterogeneous (Cu/C) copper(I) catalysts.
authors.affiliation: Faculty of Natural Sciences II (Chemistry, Physics and Mathematics), Institute of Chemistry, Chair of Macromolecular Chemistry, Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 4, Halle, 06120, Germany.
authors.forename: Sravendra
authors.initials: S
authors.lastname: Rana
authors.affiliation: Faculty of Natural Sciences II (Chemistry, Physics and Mathematics), Institute of Chemistry, Chair of Macromolecular Chemistry, Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 4, Halle, 06120, Germany.
authors.forename: Diana
authors.initials: D
authors.lastname: Döhler
authors.affiliation: Faculty of Natural Sciences II (Chemistry, Physics and Mathematics), Institute of Chemistry, Chair of Macromolecular Chemistry, Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 4, Halle, 06120, Germany.
authors.forename: Ali Shaygan
authors.initials: AS
authors.lastname: Nia
authors.affiliation: Faculty of Natural Sciences II (Chemistry, Physics and Mathematics), Institute of Physics, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Straße 2, Halle, 06120, Germany.
authors.forename: Mahmood
authors.initials: M
authors.lastname: Nasir
authors.forename: Osim
authors.initials: O
authors.lastname: Wilton
authors.affiliation: Faculty of Natural Sciences II (Chemistry, Physics and Mathematics), Institute of Physics, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Straße 2, Halle, 06120, Germany.
authors.forename: Mario
authors.initials: M
authors.lastname: Beiner
authors.affiliation: Faculty of Natural Sciences II (Chemistry, Physics and Mathematics), Institute of Chemistry, Chair of Macromolecular Chemistry, Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 4, Halle, 06120, Germany. wolfgang.binder@chemie.uni-halle.de.
authors.forename: Wolfgang H
authors.initials: WH
authors.lastname: Binder
mesh_terms: D057930:Click Chemistry; D003300:Copper / Q000737:chemistry; D006108:Graphite / Q000737:chemistry*; D053761:Nanocomposites / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry; D010316:Particle Size; D013499:Surface Properties
chemical_list: D009942:Organometallic Compounds; D006108:Graphite; D003300:Copper; C030973:cupric oxide
keywords: click chemistry; graphene; mechanical properties; self-healing nanocomposites