Modeling and characterization of enhanced piezoelectric PVDF-TrFE/CoFe2O4 nanocomposites

IF 3.674 4区工程技术 Q1 Engineering

Applied Nanoscience Pub Date : 2025-09-11 DOI:10.1007/s13204-025-03114-w

Marco Fortunato, Adriano Cimini, Gabriele Galbato Muscio, Daniele Passeri, Maria Paola Bracciale, Maria Laura Santarelli, Maria Sabrina Sarto

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引用次数: 0

Abstract

In this study, we combined experimental Piezoresponse Force Microscopy (PFM) analysis with an empirically corrected Furukawa model to predict the piezoelectric behavior of Poly(Vinylidene Fluoride-co-Trifluoroethylene) (PVDF-TrFE) films functionalized with CoFe₂O₄ (CFO) Magnetic Nanoparticles (MNPs). According to our empirical model, the piezoelectric response observed from PFM analysis on the PVDF-TrFE/CFO films was mainly influenced by the interaction between the CFO MNPs and the polymer active β phase of the polymer, providing a high piezoelectric coefficient d₃₃ (~ 6.5 pm/V) at a low CFO concentration of 5 wt%. Experimental observation of the morphological formation of the polar β domains and their phase dependence from the CFO MNPs amounts have been investigated by means of Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), and Fourier Transform Infrared (FT-IR) spectroscopy analysis. Also, the local magnetic response of the PVDF-TrFE/CFO film at 5 wt% was investigated through Magnetic Force Microscopy (MFM) with a controlled magnetized tip. DC magnetic poling of the PVDF-TrFE/CFO film at 5 wt% resulted in a significant increase in the d₃₃ (~ 34 pm/V) under an applied external magnetic field of ~ 50 mT. A theoretical model of chain aggregate-like structure formation in magnetizable polymer-based nanocomposites was employed to explain the effect of CFO MNP chain unification on the local piezoelectric strain response of PVDF-TrFE/CFO films under low magnetic fields. This finding provide further insight into the implementation of flexible PVDF-TrFE/CFO thin nanocomposites with tailored piezoelectric performance, enhancing their efficiency in energy harvesting and advancing the development of next-generation piezoelectric devices.

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增强压电PVDF-TrFE/CoFe2O4纳米复合材料的建模与表征

在这项研究中，我们将实验压电响应力显微镜（PFM）分析与经验修正的Furukawa模型相结合，以预测CoFe2O4 （CFO）磁性纳米颗粒（MNPs）功能化的聚偏氟乙烯-共三氟乙烯（PVDF-TrFE）薄膜的压电行为。根据我们的经验模型，PFM分析观察到PVDF-TrFE/CFO薄膜的压电响应主要受CFO MNPs和聚合物活性β相之间的相互作用影响，在低CFO浓度为5 wt%时提供了高压电系数d33 （~ 6.5 pm/V）。通过扫描电子显微镜（SEM）、原子力显微镜（AFM）和傅里叶变换红外光谱（FT-IR）分析，研究了极性β结构域的形态形成及其与CFO MNPs量的相依赖性。同时，通过磁化尖端可控的磁力显微镜（MFM）研究了5 wt%时PVDF-TrFE/CFO膜的局部磁响应。在~ 50 mT的外加磁场下，PVDF-TrFE/CFO薄膜在5 wt%时的直流极化导致d33 （~ 34 pm/V）显著增加。采用可磁化聚合物基纳米复合材料中链状聚集体结构形成的理论模型来解释CFO MNP链统一对PVDF-TrFE/CFO薄膜在低磁场下局部压电应变响应的影响。这一发现为实现具有定制压电性能的柔性PVDF-TrFE/CFO薄纳米复合材料提供了进一步的见解，提高了其能量收集效率，并推动了下一代压电器件的发展。

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来源期刊

Applied Nanoscience Materials Science-Materials Science (miscellaneous)

CiteScore

7.10

自引率

0.00%

发文量

430

期刊介绍： Applied Nanoscience is a hybrid journal that publishes original articles about state of the art nanoscience and the application of emerging nanotechnologies to areas fundamental to building technologically advanced and sustainable civilization, including areas as diverse as water science, advanced materials, energy, electronics, environmental science and medicine. The journal accepts original and review articles as well as book reviews for publication. All the manuscripts are single-blind peer-reviewed for scientific quality and acceptance.