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“Click”‐Triggered Self‐Healing Graphene Nanocomposites
Author(s) -
Rana Sravendra,
Döhler Diana,
Nia Ali Shaygan,
Nasir Mahmood,
Beiner Mario,
Binder Wolfgang H.
Publication year - 2016
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201600466
Subject(s) - graphene , materials science , self healing , ultimate tensile strength , nanocomposite , composite material , catalysis , click chemistry , filler (materials) , capsule , copper , self healing material , chemical engineering , nanotechnology , polymer chemistry , chemistry , organic chemistry , metallurgy , medicine , alternative medicine , botany , pathology , engineering , biology
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 Cu 2 O (TRGO‐Cu 2 O‐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‐Cu 2 O demonstrating significantly faster self‐healing compared to homogeneous (Cu(PPh 3 ) 3 F, Cu(PPh 3 ) 3 Br), and heterogeneous (Cu/C) copper(I) catalysts.