Salstrom, N. (2020) The effect of print speed and material aging on the mechanical properties of a self-healing nanocomposite hydrogel.pdf (1.89 MB)
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The effect of print speed and material aging on the mechanical properties of a self-healing nanocomposite hydrogel

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journal contribution
posted on 29.05.2020 by Nathalie Sallstrom, Athanasios Goulas, Simon Martin, Daniel Engstrom
A UV-curable nanoclay-zwitterionic hydrogel is synthesised and evaluated though rheological and mechanical testing. The result shows that aging time of the pre-gel have a big impact on storage and loss of modulus which both increases with increasing aging time, particularly in the first 48 h. The pre-gel is successfully printed and is shown to be able to support itself making it possible to fully print structures before curing. Compression and tensile samples are printed and compared to cast samples. The pre-gel aging time showed that an increased time resulted in a lower strain at failure for both casted and extruded samples. However, when printing with a speed of 10 mm/s with UV-curing during printing, a significant increase in strain at failure is achieved. Furthermore, the compressed samples display self-healing abilities at room temperature and almost completely returns to its original state before compression occurred.

Funding

(EPSRC) CDT - Additive Manufacturing : EP/L01534X/1

History

School

  • Mechanical, Electrical and Manufacturing Engineering
  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Materials

Published in

Additive Manufacturing

Volume

35

Pages

101253

Publisher

Elsevier BV

Version

VoR (Version of Record)

Rights holder

© The authors

Publisher statement

This is an Open Access Article. It is published by Elsevier under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/

Acceptance date

13/04/2020

Publication date

2020-05-11

Copyright date

2020

ISSN

2214-8604

eISSN

2214-8604

Language

en

Depositor

Dr Daniel Engstrom. Deposit date: 28 May 2020

Article number

101253

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