High-strength, healable, supramolecular polymer nanocomposites

[thumbnail of ja-2012-00050x_SI_revised.pdf]
Preview
Text - Supplemental Material
· Please see our End User Agreement before downloading.
| Preview
[thumbnail of ja-2012-00050x_manuscript_revised.pdf]
Preview
Text - Accepted Version
· Please see our End User Agreement before downloading.
| Preview

Please see our End User Agreement.

It is advisable to refer to the publisher's version if you intend to cite from this work. See Guidance on citing.

Add to AnyAdd to TwitterAdd to FacebookAdd to LinkedinAdd to PinterestAdd to Email

Fox, J., Wie, J., Greenland, B., Burattini, S., Hayes, W. orcid id iconORCID: https://orcid.org/0000-0003-0047-2991, Colquhoun, H., Mackay, M. and Rowan, S. (2012) High-strength, healable, supramolecular polymer nanocomposites. Journal of the American Chemical Society, 134 (11). pp. 5362-5368. ISSN 0002-7863 doi: 10.1021/ja300050x

Abstract/Summary

A supramolecular polymer blend, formed via π-π interactions between a π-electron rich pyrenyl endcapped oligomer and a chain-folding oligomer containing pairs of π-electron poor naphthalene-diimide (NDI) units, has been reinforced with cellulose nanocrystals (CNCs) to afford a healable nanocomposite material. Nanocomposites with varying weight percentage of CNCs (from 1.25 to 20.0 wt.%) within the healable supramolecular polymeric matrix have been prepared via solvent casting followed by compression molding, and their mechanical properties and healing behavior have been evaluated. It is found that homogeneously dispersed films can be formed with CNCs at less than 10 wt.%. Above 10 wt.% CNC heterogeneous nanocomposites were obtained. All the nanocomposites formed could be re-healed upon exposure to elevated temperatures although, for the homogeneous films, it was found that the healing rate was reduced with increasing CNC content. The best combination of healing efficiency and mechanical properties was obtained with the 7.5 wt.% CNC nanocomposite which exhibited a tensile modulus enhanced by as much as a factor of 20 over the matrix material alone and could be fully re-healed at 85 °C within 30 minutes. Thus it is demonstrated that supramolecular nanocomposites can afford greatly enhanced mechanical properties relative to the unreinforced polymer, while still allowing efficient thermal healing.

Altmetric Badge

Item Type Article
URI https://reading-clone.eprints-hosting.org/id/eprint/27638
Identification Number/DOI 10.1021/ja300050x
Refereed Yes
Divisions Interdisciplinary centres and themes > Nanoscience and Materials
Interdisciplinary centres and themes > Chemical Analysis Facility (CAF) > Electron Microscopy Laboratory (CAF)
Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
Interdisciplinary centres and themes > Chemical Analysis Facility (CAF)
Publisher American Chemical Society
Download/View statistics View download statistics for this item

Downloads

Downloads per month over past year

University Staff: Request a correction | Centaur Editors: Update this record

Search Google Scholar