Composites based on a piezoelectric polymer (PVDF) doped with different silica nanoparticles (SiNPs) content (8, 16 and 32 wt%) and functionalization (WF-without, NF-negative and PF-positive) have been investigated. Composite films were prepared by solvent casting and melt crystallization to investigate the effect of the presence of the SiNPs on the physico-chemical characteristics and, in particular, in the nucleation of the electroactive β-phase of the polymer. It is shown that the introduction of the SiNPs allows to increase water surface angle up to 34% with respect to α-PVDF, as well to increase the elastic modulus. Filler content and type have an important effect on the nucleation of the electroactive beta phase content and the dielectric properties of the composites, the larger values of both being obtained for positively surface charged nanoparticles. It is concluded that, taken into consideration the overall properties of the composites, the SiNPs-PF/PVDF nanocomposites with 8 wt% filler content offer a promising approach for applications due to the improvement of the electroactive phase of PVDF.

已经研究了基于掺有不同二氧化硅纳米粒子（SiNPs）含量（8、16和32 wt％）和功能化（无WF，无NF负和PF负）的压电聚合物（ PVDF）的复合材料。通过溶剂浇铸和熔融结晶制备复合膜，以研究SiNPs的存在对理化特性，特别是在聚合物电活性β-相成核中的影响。结果表明，引入SiNPs可以将水面角相对于α-提高至34％PVDF以及增加弹性模量。填料的含量和类型对电活性β相含量的成核和复合材料的介电性能具有重要影响，对于带正电的纳米粒子，两者的值都较大。结论是，考虑到复合材料的整体性能，由于PVDF的电活性相的改善，具有8 wt％填料含量的SiNPs-PF / PVDF纳米复合材料为应用提供了一种有前途的方法。