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, Leibniz-Institut für Neue Materialien, 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

09-2014

Peer-reviewed

Ja

ÖFOS 2012

103015 Kondensierte Materie, 103018 Materialphysik

Schlagwörter

ASJC Scopus Sachgebiete

Allgemeiner Maschinenbau, Biomaterials

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/ffeb065b-aa29-4fee-81c8-6207397a2ad9