A self-healing, adaptive and conductive polymer composite ink for 3D printing of gas sensors

Tongfei Wu, Euan Gray, Biqiong Chen

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)
214 Downloads (Pure)

Abstract

A self-healing conductive polymer composite ink was formulated for 3D extrusion printing of flexible electronics. It was composed of a polyborosiloxane (PBS) matrix and 5 vol% of electrochemically exfoliated graphene. The printability was derived from the chemical-activated mechanically adaptive properties (MAPs) of PBS. The MAPs of PBS and the composite ink were studied through rheological measurements, and the non-Newtonian nature was analyzed using the Carreau–Yasuda model. With methanol vapor as a representative stimulus, the underpinning mechanism of the MAPs of PBS, which involved the methanol-induced alcoholysis of the cross-linking boron/oxygen dative bonds in PBS, was further investigated by infrared spectroscopy. The self-healing, adaptive and conductive composite ink could be used to print 3D structures and devices on a common polydimethylsiloxane flexible substrate. A 3D-printed gas sensor with responses to various chemical vapors was demonstrated as a potential application of this novel composite ink.
Original languageEnglish
Pages (from-to)6200-6207
Number of pages8
JournalJournal of Materials Chemistry C
Volume6
Early online date05 May 2018
DOIs
Publication statusPublished - 21 Jun 2018

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