Publikationen

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

Autor(en)
Johanna Akbarzadeh, Stephan Puchegger, Anja Stojanovic, Helmut O. K. Kirchner, Wolfgang H. Binder, Sigrid Bernstorff, Peter Zioupos, Herwig Peterlik
Abstrakt

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(en)
Dynamik Kondensierter Systeme, Fakultätszentrum für Nanostrukturforschung
Externe Organisation(en)
Martin-Luther-Universität Halle-Wittenberg, Inst New Mat GmbH, Elettra Sincrotrone Trieste, Cranfield University
Journal
Bioinspired, Biomimetic and Nanobiomaterials
Band
3
Seiten
123-130
Anzahl der Seiten
8
ISSN
2045-9858
DOI
https://doi.org/10.1680/bbn.14.00007
Publikationsdatum
2014
Peer-reviewed
Ja
ÖFOS 2012
103018 Materialphysik, 103015 Kondensierte Materie
Schlagwörter
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/timescales-of-selfhealing-in-human-bone-tissue-and-polymeric-ionic-liquids(ffeb065b-aa29-4fee-81c8-6207397a2ad9).html