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Fabrication of a piezoelectric polyvinylidene fluoride/carbonyl iron (PVDF/CI) magnetic composite film towards the magnetic field and deformation bi-sensor
Composites Science and Technology ( IF 9.1 ) Pub Date : 2018-09-01 , DOI: 10.1016/j.compscitech.2018.06.006
Min Sang , Sheng Wang , Mei Liu , Linfeng Bai , Wanquan Jiang , Shouhu Xuan , Xinglong Gong

Abstract In this paper, a versatile polyvinylidene fluoride/carbonyl iron (PVDF/CI) composite film was prepared by doping magnetic carbonyl iron (CI) particles into piezoelectric polyvinylidene fluoride (PVDF) matrix. Without influencing the piezoelectric structure of PVDF, CI particles enhanced the Young's modulus and maximum tensile strength of composite films. Due to the magnetic driven characteristic, PVDF/CI composite films exhibited distinct magnetic-mechanic-electric coupling properties. The piezoelectric charge signals could be generated by applying the bending deformation or magnetic field. Taking PVDF/CI-10% (CI content was 10 wt%) film as an example, the piezoelectric charges under 2, 4, 6, 8, and 10 mm bending displacement were 3.0, 9.6, 14.9, 18.6, and 24.6 pC respectively. Moreover, when the magnetic field varied from 0 to 600 mT, the generated magneto-electric charges of PVDF/CI-10% film increased from 0 to 676 pC. The quantitative relationship between magnetic field and magneto-electric charges was obtained by the polynomial fitting method and the correlation coefficient was up to 0.97. Owing to the ideal piezoelectricity, excellent stability, light weight and desirable flexibility, PVDF/CI composite films showed promising applications in deformation sensor and magnetic field sensor.

中文翻译:

压电聚偏二氟乙烯/羰基铁(PVDF/CI)磁性复合膜的制备朝向磁场和变形双传感器

摘要 本文通过将磁性羰基铁(CI)粒子掺杂到压电聚偏二氟乙烯(PVDF)基体中,制备了一种多功能的聚偏二氟乙烯/羰基铁(PVDF/CI)复合薄膜。在不影响 PVDF 压电结构的情况下,CI 粒子增强了复合薄膜的杨氏模量和最大拉伸强度。由于磁驱动特性,PVDF/CI 复合薄膜表现出明显的磁-机-电耦合特性。通过施加弯曲变形或磁场可以产生压电电荷信号。以PVDF/CI-10%(CI含量为10 wt%)薄膜为例,2、4、6、8、10 mm弯曲位移下的压电电荷分别为3.0、9.6、14.9、18.6和24.6 pC . 此外,当磁场从 0 到 600 mT 变化时,PVDF/CI-10%薄膜产生的磁电荷从0增加到676 pC。通过多项式拟合的方法得到了磁场与磁电电荷的定量关系,相关系数高达0.97。由于理想的压电性、优异的稳定性、重量轻和理想的柔韧性,PVDF/CI 复合薄膜在变形传感器和磁场传感器中显示出广阔的应用前景。
更新日期:2018-09-01
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