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<p>This study reports the results of producing a highly electroactive actuator by tailoring the crystalline phases in one-dimensionally confined nanostructures. The nanoconfinement effect induced by the gap spinning method, which involves preparing well-oriented small-diameter PVDF nanofibers, is responsible for the formation of the predominant polar β-phase in the crystalline structure. Incorporation of only 0.04 wt% Cloisite 30B nanoparticles further enhanced the molecular orientation through polymer chain-clay platelet interfacial interactions. With a β-phase content of 91%, the highly oriented PVDF/Cloisite 30B nanofibers displayed a dielectric constant that was 21% higher, and an elastic modulus that was 95% greater, than that of randomly oriented pure PVDF nanofibers. The piezoelectric performance of the nanofibers was evaluated by designing a unimorph piezoelectric actuator. The device achieved an actuation deflection of 12.8&#xa0;μm under an applied electric field of 2&#xa0;V/µm, demonstrating remarkable piezoelectric efficiency compared to similar actuators reported in literature.</p>

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Enhanced piezoelectric response of polyvinylidene fluoride/Cloisite 30B nanofiber actuators

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月22日

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  • Sobhan Sharafkhani,
  • Farshad Azizi,
  • Kamran Foroutani

摘要

This study reports the results of producing a highly electroactive actuator by tailoring the crystalline phases in one-dimensionally confined nanostructures. The nanoconfinement effect induced by the gap spinning method, which involves preparing well-oriented small-diameter PVDF nanofibers, is responsible for the formation of the predominant polar β-phase in the crystalline structure. Incorporation of only 0.04 wt% Cloisite 30B nanoparticles further enhanced the molecular orientation through polymer chain-clay platelet interfacial interactions. With a β-phase content of 91%, the highly oriented PVDF/Cloisite 30B nanofibers displayed a dielectric constant that was 21% higher, and an elastic modulus that was 95% greater, than that of randomly oriented pure PVDF nanofibers. The piezoelectric performance of the nanofibers was evaluated by designing a unimorph piezoelectric actuator. The device achieved an actuation deflection of 12.8 μm under an applied electric field of 2 V/µm, demonstrating remarkable piezoelectric efficiency compared to similar actuators reported in literature.