Jump to main content
Jump to site search

Issue 13, 2018
Previous Article Next Article

Switching “on” and “off” the adhesion in stimuli-responsive elastomers

Author affiliations

Abstract

The present work aims at the preparation of dry adhesives with switchable bonding properties by using the reversible nature of the [4πs+4πs] cycloaddition of anthracenes. Photo-responsive hydrogenated carboxylated nitrile butadiene rubber with photo-responsive pendant anthracene groups is prepared by one-pot synthesis. The formation of 3D networks relies on the photodimerization of the anthracene moieties upon UV exposure (λ > 300 nm). Controlled cleavage of the crosslink sites is achieved by either deep UV exposure (λ = 254 nm) or thermal dissociation at 70 °C. The kinetics of the optical and thermal cleavage routes are compared in thin films using UV-vis spectroscopy and their influence on the reversibility of the network is detailed. Going from thin films to free standing samples the modulation of the network structure and thermo-mechanical properties over repeated crosslinking and cleavage cycles are characterized by low-field NMR spectroscopy and dynamic mechanical analysis. The applicability of the stimuli-responsive networks as adhesives with reversible bonding properties is demonstrated. The results evidence that the reversibility of the crosslinking reaction enables a controlled switching “on” and “off” of adhesion properties. The recovery of the adhesion force amounts to 75 and 80% for photo- and thermal dissociation, respectively. Spatial control of adhesion properties is evidenced by adhesion force mapping experiments of photo-patterned films.

Graphical abstract: Switching “on” and “off” the adhesion in stimuli-responsive elastomers

Back to tab navigation

Supplementary files

Publication details

The article was received on 08 Feb 2018, accepted on 05 Mar 2018 and first published on 06 Mar 2018


Article type: Paper
DOI: 10.1039/C8SM00284C
Citation: Soft Matter, 2018,14, 2547-2559
  •   Request permissions

    Switching “on” and “off” the adhesion in stimuli-responsive elastomers

    S. Kaiser, S. V. Radl, J. Manhart, S. Ayalur-Karunakaran, T. Griesser, A. Moser, C. Ganser, C. Teichert, W. Kern and S. Schlögl, Soft Matter, 2018, 14, 2547
    DOI: 10.1039/C8SM00284C

Search articles by author

Spotlight

Advertisements