Jump to main content
Jump to site search


Local dynamics in supramolecular polymer networks probed by magnetic particle nanorheology

Author affiliations

Abstract

Transient supramolecular polymer networks are promising candidates as soft self-healing or stimuli-sensitive materials. In this paper, we employ a novel nanorheological approach, magnetic particle nanorheology (MPN), in order to better understand the local dynamic properties of model supramolecular networks from a molecular point of view. Hence, the bond strength between four-arm star-shaped polyethylene glycol (PEG) functionalized at the four extremities with terpyridine ligands is tuned by implementing different metal ions with variable complexation affinities for the ligand. We show that MNP allows for the evaluation of the strength and connectivity of the polymer networks by the estimation of relaxation times, mesh size, and also the viscoelastic properties of these materials. These results are compared and complemented to former outcomes on these systems that were obtained by macroscopic analytical methods. A clear dependence between the strength of the metal–ligand complex and the local dynamics of the polymeric network is observed by the nanorheological approach, which is in good agreement with previous predictions related to the complex formation constants.

Graphical abstract: Local dynamics in supramolecular polymer networks probed by magnetic particle nanorheology

Back to tab navigation

Supplementary files

Publication details

The article was received on 04 Sep 2018, accepted on 12 Dec 2018 and first published on 13 Dec 2018


Article type: Paper
DOI: 10.1039/C8SM01802B
Citation: Soft Matter, 2019, Advance Article
  •   Request permissions

    Local dynamics in supramolecular polymer networks probed by magnetic particle nanorheology

    M. Hess, E. Roeben, A. Habicht, S. Seiffert and A. M. Schmidt, Soft Matter, 2019, Advance Article , DOI: 10.1039/C8SM01802B

Search articles by author

Spotlight

Advertisements