Publications

Timescales of self-healing in human bone tissue and polymeric ionic liquids

Author(s)
Johanna Akbarzadeh, Stephan Puchegger, Anja Stojanovic, Helmut O. K. Kirchner, Wolfgang H. Binder, Sigrid Bernstorff, Peter Zioupos, Herwig Peterlik
Abstract

Strain (stress-free) relaxation in mechanically prestrained bone has a time constant of 75 s. It occurs by a reorganization of the proteoglycan-glycoprotein matrix between collagen fibers, which requires ionic interactions. Dissolving and relinking the ionic bonds is thus an important tool of nature to enable plastic deformation and to develop self-healing tissues. A way to transfer this approach to technical materials is the attachment of ionic end groups to polymeric chains. In these classes of materials, the so-called polymeric ionic liquids, structural recovery of thermally disorganized material is observed. A time constant between minutes and a week could be achieved, also by ionic rearrangement. The same mechanism, rearrangement of ionic bonds, can lead to vastly different relaxation times when the ionic interaction is varied by exchange of the cationic end groups or the anions.

Organisation(s)
Dynamics of Condensed Systems, Faculty Center for Nano Structure Research
External organisation(s)
Martin-Luther-Universität Halle-Wittenberg, Leibniz-Institut für Neue Materialien, Elettra-Sincrotrone Trieste S.C.p.A., Cranfield University
Journal
Bioinspired, Biomimetic and Nanobiomaterials
Volume
3
Pages
123-130
No. of pages
8
ISSN
2045-9858
DOI
https://doi.org/10.1680/bbn.14.00007
Publication date
09-2014
Peer reviewed
Yes
Austrian Fields of Science 2012
103015 Condensed matter, 103018 Materials physics
Keywords
ASJC Scopus subject areas
Engineering(all), Biomaterials
Portal url
https://ucris.univie.ac.at/portal/en/publications/timescales-of-selfhealing-in-human-bone-tissue-and-polymeric-ionic-liquids(ffeb065b-aa29-4fee-81c8-6207397a2ad9).html