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<p>In the fields of wearable sensors, energy harvesting and actuator applications, organic–inorganic composite piezoelectric materials have gained significant research interest owing to their tunable performance, flexibility, light weight, and facile fabrication. In this work, composite piezoelectric films were fabricated by dispersing hydroxylated BaTiO<sub>3</sub> (BTO-OH) nanoparticles into polyvinylidene fluoride-hexafluoropropylene copolymer (P(VDF-HFP)). The <i>β</i> phase content was found to increase with filler concentration, reaching a maximum of 89.67% in films containing 50% BTO-OH, which acted as a nucleating agent for β phase crystallization. Moreover, the 50% BTO-OH composite film exhibited exceptional dielectric properties, featuring a dielectric constant of 19.8 and a loss tangent of 0.08 at a frequency of 10<sup>3</sup>&#xa0;Hz. The maximum polarization reached 8.8 μC cm<sup>−2</sup> under an electric field of 3000&#xa0;kV&#xa0;cm<sup>−1</sup>. The piezoelectric strain coefficient <i>d</i><sub>33</sub> reached 20.5 pC N<sup>−1</sup>. This work offers an efficient and low-cost approach to the fabrication of BTO-based dielectric and piezoelectric composites.</p> Graphical Abstract <p></p>

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Enhanced Dielectric, Ferroelectric, and Piezoelectric Properties of BaTiO3/P(VDF-HFP) Composite Films Using a Cheap Hydroxylated Surface Modification Method

  • 期刊论文

  • 发表日期：

    2025年11月21日

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  • Jing Wang,
  • Cheng Fang,
  • Chang Shu,
  • Ling Zhou

摘要

In the fields of wearable sensors, energy harvesting and actuator applications, organic–inorganic composite piezoelectric materials have gained significant research interest owing to their tunable performance, flexibility, light weight, and facile fabrication. In this work, composite piezoelectric films were fabricated by dispersing hydroxylated BaTiO3 (BTO-OH) nanoparticles into polyvinylidene fluoride-hexafluoropropylene copolymer (P(VDF-HFP)). The β phase content was found to increase with filler concentration, reaching a maximum of 89.67% in films containing 50% BTO-OH, which acted as a nucleating agent for β phase crystallization. Moreover, the 50% BTO-OH composite film exhibited exceptional dielectric properties, featuring a dielectric constant of 19.8 and a loss tangent of 0.08 at a frequency of 103 Hz. The maximum polarization reached 8.8 μC cm−2 under an electric field of 3000 kV cm−1. The piezoelectric strain coefficient d33 reached 20.5 pC N−1. This work offers an efficient and low-cost approach to the fabrication of BTO-based dielectric and piezoelectric composites.

Graphical Abstract