Abstract
With increasing of the intellectualized electronics devices, new kinds of flexible ferroelectric polymer materials with high dielectric constant attracted more and more attention in recent decades. Polyvinylidene fluoride (PVDF), as one of the most studied ferroelectric polymer materials, has been studied in many published works. Among these works, lots of efforts have been employed to promote the generation of β crystal phase. We here introduced a concise and effective way for large-scale fabrication of promising ferroelectric polymer films by doping a metal–organic framework (MOF) particles via costing process. Then effects of the addition of MOF on the ferroelectric, dielectric and mechanical properties of PVDF composite film were systematic researched. By comparing the results of XRD and FTIR, we found that the addition of MOF changed the α crystal phase of PVDF to β crystal phase which helped improve the ferroelectric and dielectric properties of PVDF composites. The new PVDF composite film, with very low addition (5wt.%) of MOF, possessed the highest remanent polarization (22μC/cm2 at 80MV/m and 1 Hz electric field), and the highest dielectric constant (21 at 10 Hz). The data of mechanical properties indicated that the fine dispersion of MOF maintained the flexibility of PVDF.
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