Direct sound printing

Mohsen Habibi, Shervin Foroughi, Vahid Karamzadeh and Muthukumaran Packirisamy ()
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Mohsen Habibi: Concordia University
Shervin Foroughi: Concordia University
Vahid Karamzadeh: Concordia University
Muthukumaran Packirisamy: Concordia University

Nature Communications, 2022, vol. 13, issue 1, 1-11

Abstract: Abstract Photo- and thermo-activated reactions are dominant in Additive Manufacturing (AM) processes for polymerization or melting/deposition of polymers. However, ultrasound activated sonochemical reactions present a unique way to generate hotspots in cavitation bubbles with extraordinary high temperature and pressure along with high heating and cooling rates which are out of reach for the current AM technologies. Here, we demonstrate 3D printing of structures using acoustic cavitation produced directly by focused ultrasound which creates sonochemical reactions in highly localized cavitation regions. Complex geometries with zero to varying porosities and 280 μm feature size are printed by our method, Direct Sound Printing (DSP), in a heat curing thermoset, Poly(dimethylsiloxane) that cannot be printed directly so far by any method. Sonochemiluminescnce, high speed imaging and process characterization experiments of DSP and potential applications such as remote distance printing are presented. Our method establishes an alternative route in AM using ultrasound as the energy source.

Date: 2022
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DOI: 10.1038/s41467-022-29395-1

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