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

Abstract

Self-healing conductive polymer composite ink was formulated for 3D extrusion printing of flexible electronics. It was composed of the matrix polyborosiloxane (PBS) and 5 vol.% of electrochemically exfoliated graphene. The printability was derived from the chemical-activated mechanically adaptive property (MAP) of PBS. The MAP of PBS and the composite ink was 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 MAP of PBS, which involved the methanol-induced alcoholysis of 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 the popular 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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Publication details

The article was received on 06 Mar 2018, accepted on 04 May 2018 and first published on 05 May 2018


Article type: Paper
DOI: 10.1039/C8TC01092G
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    Self-healing, adaptive and conductive polymer composite ink for 3D printing of gas sensors

    T. Wu, E. Gray and B. Chen, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC01092G

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