• Poly(vinylidene fluoride) Piezoelectric Film Characteristics by Poling Conditions for Distributed Tactile Sensor
  • Lee K, Kim D, Kim H, Jung K, Choi H, Nam JD
  • 분포형 촉각센서를 위한 압전성 폴리(비닐리덴 플루오라이드) 필름의 극화 특성
  • 이경섭, 김동욱, 김형태, 정광목, 최혁렬, 남재도
Abstract
The poling characteristics of PVDF (poly(vinylidene fluoride)) film was investigated by measuring the electric voltage generated by the external load for the distributed tactile sensor applications. The poling conditions for the PVDF films were controlled by changing temperature and electric field, and the resulting crystal structure of the β-phase crystal was confirmed by FT-IR, DSC, and XRD experiments. The β-phase crystal was increased with the poling temperature and poling voltage, and subsequently the permittivity of the poled PVDF films was increased. Finally, the prototype tactile sensor was tested by a 88 array circuit exhibiting high voltage signal for the highly poled PVDF films.

가해준 하중에 따라 폴리(비닐리덴 플루오라이드) (PVDF) 필름에서 발생하는 전압을 측정하여 분포형 촉각센서로서의 특성을 연구하였다. PVDF 필름에 전기장과 온도를 달리하면서 극화 (poling)의 변화를 주었고 이에 따른 필름의 압전성을 나타내는 β-결정상의 피크를 FT-IR, DSC와 XRD를 사용하여 확인하였다. 본 연구에서 사용된 온도와 전압의 영역에서는 그고하 온도가 증가함에 따라 그리고 극화 전압이 증가함에 따라 β-결정상은 증가하였으며, 이에 따라 유전상수가 역시 증가하였다. 8X8어레이 (array)로 제작된 촉각센서에 힘을 가하여 극화에 따른 전압 발생량을 측정한 결과, 극화가 많이 된 시편의 경우 높은 전압이 발생하는 것을 확인하였다.

Keywords: β-crystalline; dielectric constant; piezoelectricity; PVDF; tactile sensor

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2024 Impact Factor : 0.6
  • Indexed in SCIE

This Article

  • 2004; 28(5): 361-366

    Published online Sep 25, 2004

  • Received on Apr 14, 2004
  • Accepted on Aug 11, 2004