Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 6, Issue 23, Pages 6200-6207Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8tc01092g
Keywords
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Funding
- European Union's Horizon 2020 Research and Innovation Programme under Marie Sklodowska-Curie Grant [656467]
- Marie Curie Actions (MSCA) [656467] Funding Source: Marie Curie Actions (MSCA)
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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.
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