3D Printing Ionogel Auxetic Frameworks for Stretchable Sensors

Jitkanya Wong, Alex T. Gong, Peter A. Defnet, Leire Meabe, Bruce Beauchamp, Robert M. Sweet, Haritz Sardon, Corie L. Cobb, Alshakim Nelson

Research output: Contribution to journalArticlepeer-review

80 Scopus citations


Ionogels are an emerging class of soft materials that exhibit ionic conductivity and thermal stability without the need to replenish ions or the addition of conductive particle fillers. An ionogel ink is reported for direct-write 3D printing to fabricate conductive structures that can vary in the printed object geometries. This approach relies on a shear-thinning ionogel ink that can be extruded to afford self-supporting constructs. After a brief UV cure, the printed construct is transformed into a mechanically tough, transparent structure that is ionically conductive. Upon application of stretching and twisting loads, the 3D-printed objects exhibit detectable changes in conductivity. To demonstrate the versatility of rapid prototyping with the ionogel inks, an auxetic structure is 3D printed and tested as a strain sensor. The printed auxetic structure exhibits an electrical response to strain, but also demonstrates increased extensibility and operational range in comparison to a casted bulk film with the same outer dimensions.

Original languageEnglish (US)
Article number1900452
JournalAdvanced Materials Technologies
Issue number9
StatePublished - Sep 1 2019

Bibliographical note

Funding Information:
A.T.G. and R.M.S. acknowledge Department of Defense Army Research Lab grant (W911NF-16-2-0147) and thank Jack Norfleet of the U.S. Army Research Laboratory for support. A.N. acknowledges funding from the Army Research Office (W911NF-17-1-0595) for partial support of this project. We thank Tuesday Kuykendall for assistance with TGA experiments.

Publisher Copyright:
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim


  • ionic liquids
  • ionogels
  • printing
  • soft sensors
  • stretchable sensors


Dive into the research topics of '3D Printing Ionogel Auxetic Frameworks for Stretchable Sensors'. Together they form a unique fingerprint.

Cite this