Abstract Piezoelectric and dielectric performance of polyvinylidenefluoride (PVDF) based composites are greatly influenced by the presence of electroactive polar s-phase structure, which can be induced into PVDF matrix through mechanical stretching. Irrespective of numerous studies reported earlier, no literature has revealed the effect of mechanical stretching on the piezoelectric and dielectric behaviour of PVDF-Carbon-based fillers (Graphene Oxide-GO) and reduced Graphene Oxide-rGO)) reinforced composites. In this work, we have investigated the combined effect of chemical addition and mechanical deformation, on the improvement of electroactive s-phase structure and dielectric behaviour of PVDF-GO/rGO composites. Maximum s-phase content (86 % for PVDF-GO and 84 % for PVDF-rGO) with improved dielectric properties (Dielectric constant: 28.5 for PVDF-GO and 27.5 for PVDF-rGO, Dielectric loss: 0.025 for PVDF-GO and 0.015 for PVDF-rGO) have been achieved in such composites for stretch ratio 2. This behaviour is attributed to the strong interaction between PVDF and GO/rGO where maximum stress was distributed through uniform stretching force.

中文翻译：

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机械拉伸 PVDF-GO 和 PVDF-rGO 复合材料的电活性相含量和介电行为的研究

摘要 聚偏氟乙烯（PVDF）基复合材料的压电和介电性能受电活性极性s相结构的影响很大，电活性极性s相结构可以通过机械拉伸诱导到PVDF基体中。不管之前报道的大量研究，没有文献揭示机械拉伸对 PVDF-碳基填料（氧化石墨烯-GO）和还原氧化石墨烯-rGO）增强复合材料的压电和介电行为的影响。在这项工作中，我们研究了化学添加和机械变形对改善 PVDF-GO/rGO 复合材料电活性 s 相结构和介电行为的综合影响。最大 s 相含量（PVDF-GO 为 86%，PVDF-rGO 为 84%），具有改进的介电性能（介电常数：28。