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Supplementary Information files for The effect of print speed and material aging on the mechanical properties of a self-healing nanocomposite hydrogel

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posted on 19.04.2021, 13:21 authored by Nathalie Sallstrom, Athanasios GoulasAthanasios Goulas, Simon MartinSimon Martin, Daniel EngstromDaniel Engstrom
Supplementary Information files for The effect of print speed and material aging on the mechanical properties of a self-healing nanocomposite hydrogel
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 Centre for Doctoral Training in Additive Manufacturing and 3D Printing

Engineering and Physical Sciences Research Council

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History

School

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

Department

  • Materials