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Influence of Aspartate Moieties on the Self‐Healing Behavior of Histidine‐Rich Supramolecular Polymers
Author(s) -
Enke Marcel,
Köps Lukas,
Zechel Stefan,
Brendel Johannes C.,
Vitz Jürgen,
Hager Martin D.,
Schubert Ulrich S.
Publication year - 2018
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.201700742
Subject(s) - isothermal titration calorimetry , supramolecular chemistry , polymer chemistry , copolymer , histidine , zinc , supramolecular polymers , methacrylate , polymer , materials science , titration , chemistry , organic chemistry , molecule , biochemistry , enzyme
Aspartate incorporated into the protein structure of mussel byssal threads is believed to play an important role, besides the reversible histidine–zinc interactions, in the self‐healing behavior of mussel byssal threads. Therefore, copolymers containing both aspartate and histidine moieties are synthesized in order to investigate the influence of aspartate on the complexation of zinc(II) as well as on the self‐healing behavior and the mechanical properties of the resulting supramolecular networks. For this purpose, isothermal titration calorimetry measurements of a model aspartate compound as well as of these copolymers are performed and the thermodynamic parameters are utilized for the design of self‐healing copolymers. For this purpose, n ‐lauryl methacrylate‐based copolymers containing histidine and aspartate are synthesized and crosslinked with zinc(II) acetate. The self‐healing behavior of the supramolecular networks is investigated using scratch healing tests and the mechanical properties by nanoindentation.