Rapid Manufacturing via Selective Radio-Frequency Heating and Curing of Thermosetting Resins

Anubhav Sarmah, Suchi K. Desai, Guler Bengusu Tezel, Aniruddh Vashisth, Mazin M. Mustafa, Kailash Arole, Ava G. Crowley, Micah J. Green

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

A new method for additive manufacturing of thermosetting resins using selective, localized radio-frequency (RF) heating and curing in a thermoset reservoir is demonstrated. The use of a local RF applicator addresses the challenge of selective curing and printing of heat-curable thermosets from a reservoir of resin, without the addition of photocurable acrylates. The filler of interest is multi-walled carbon nanotubes, which heat up rapidly in response to an RF field. A target temperature can be maintained by modulating the RF power. Multilayered structures were 3D printed by moving the RF applicator relative to the resin reservoir, selectively curing the resin exposed to the field; this process was repeated for each layer. Thermal and mechanical properties of RF-printed samples were compared against conventional samples, with both methods showing similar glass transition temperatures and storage moduli; the RF-heated samples showed a more uniform morphology with lesser voids. The 3D printing process (temperature and conversion varying in space and time) is modeled to demonstrate the scope of this method in printing complex structures. This method of multilayered additive manufacturing of thermosetting resins allows for rapid, free-form processing.

Original languageEnglish (US)
Article number2101351
JournalAdvanced Engineering Materials
Volume24
Issue number7
DOIs
StatePublished - Jul 2022
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2022 Wiley-VCH GmbH.

Keywords

  • additive manufacturing
  • free-form processing
  • radio-frequency heating
  • thermosetting resin

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