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The alignment of BCZT particles in PDMS boosts the sensitivity and cycling reliabilities of a flexible piezoelectric touch sensor

Abstract

With the rapid development of wearable devices, a highly sensitive flexible piezoelectric sensor shows tremendously potential demands in future. Here, we report a novel lead-free flexible piezoelectric sensor fabricated by composite with chain-distributed (Ba0.85Ca0.15)(Ti0.90Zr0.10)O3 (BCZT) particles in polydimethylsiloxane (PDMS) matrix. The BCZT particles are prepared by a conventional solid oxide process and then dispersed in PDMS oriented by application of a dielectrophoretic alignment field. The fabricated aligned flexible composite with 8 vol.% BCZT addition has a high open circuit voltage of 28.8 V (peak-to-peak), which is nearly twice higher than that of the randomly dispersed composite. This new mechanically reinforced flexible piezoelectric composite is demonstrated to resolve the problems of the weak stress transfer to piezoelectric elements and the poor dispersion of fillers in polymer matrix. The 8 vol.% BCZT/PDMS composite was incorporated in flexible piezoelectric touch sensor, which processes an excellent sensitivity in a wide pressure range and extraordinary cycling stability. These results indicate that the fabricated flexible piezoelectric sensor have great potentials in wireless sensor network and wearable electronic fields.

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Publication details

The article was received on 19 Sep 2018, accepted on 03 Dec 2018 and first published on 05 Dec 2018


Article type: Paper
DOI: 10.1039/C8TC04741C
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    The alignment of BCZT particles in PDMS boosts the sensitivity and cycling reliabilities of a flexible piezoelectric touch sensor

    X. Gao, M. Zheng, X. Yan, J. Fu, M. Zhu and Y. Hou, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC04741C

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