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Electrospinning-induced preferred dipole orientation in PVDF fibers

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Abstract

Polyvinylidene fluoride (PVDF) can be made electroactive by properly mechanical stretching and electric poling treatments of its film, which may be easily realized by single-step electrospinning. This technique is acknowledged as an effective approach to induce rich ferroelectric β-phase in electrospun PVDF fibers; however, the investigation of dipole arrangement during the electrospinning process is still lacking. Here, the piezoelectricity of β-PVDF fibers by electrospinning and forcespinning, a mechanical spinning process without static electric field bias, has been demonstrated. Results show that the electrospun fibers can generate piezoelectric voltage after deformation, while the forcespun fibers nearly show no piezoelectricity for the same condition, revealing that electric field during the electrospinning process can perform in situ poling effect and therefore induces preferred dipole orientation in electrospun PVDF fibers. Further experiments performed in this work show that piezoelectricity of the electrospun fibers increases with increasing fraction of β-phase and/or the applied electric field strength of electrospinning, which provides good guideline for preparing high-performance piezoelectric fibers.

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Acknowledgements

The authors thank Nanotechnology Center of Xiamen University for the SEM work, and Mrs. Xinyu Liu and Mr. Yiwen Ye at Xiamen University for IR and XRD measurements, respectively. This work was supported by the National Natural Science Foundation for Youth of China (No. 51105320), the National Natural Science Foundation of China (No. 51305373), and Science and Technology Program of Shenzhen City (No. JCYJ20120615161609592).

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Authors and Affiliations

  1. Department of Mechanical and Electrical Engineering, Huaqiao University, Xiamen, 361021, China

    Tingping Lei

  2. Department of Mechanical and Electrical Engineering, Xiamen University, Xiamen, 361005, China

    Lingke Yu, Gaofeng Zheng, Lingyun Wang, Dezhi Wu & Daoheng Sun

  3. Shenzhen Research Institute of Xiamen University, Shenzhen, 518057, China

    Dezhi Wu

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  1. Tingping Lei
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  2. Lingke Yu
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  3. Gaofeng Zheng
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Correspondence to Daoheng Sun.

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Lei, T., Yu, L., Zheng, G. et al. Electrospinning-induced preferred dipole orientation in PVDF fibers. J Mater Sci 50, 4342–4347 (2015). https://doi.org/10.1007/s10853-015-8986-0

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  • DOI: https://doi.org/10.1007/s10853-015-8986-0

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