Preparation and characterization of PVDF/ CoFe2O4/g-C3N4 nanocomposite films for multi-functional applications

IF 2.5 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Magnetism and Magnetic Materials Pub Date : 2025-04-11 DOI:10.1016/j.jmmm.2025.173029

R. Nirmal Kumar , J. Hemalatha

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引用次数: 0

Abstract

Polymer nanocomposite materials with different types of fillers play crucial role in various fields such as biomedical engineering, energy storage, power generation, robotics and automation, electromagnetic shielding, aerospace and defence, especially due to their excellent flexibility, ferroelectric, ferromagnetic, chemical sensing, piezoelectric, pyroelectric and rheological properties. The present study discusses fabrication of polymer nanocomposite films using polyvinylidene fluoride (PVDF) matrix with cobalt ferrite (CoFe₂O₄) and graphitic carbon nitride (g-C₃N₄) fillers and also their characterization. Crystalline CoFe₂O₄ nanoparticles and g-C₃N₄ were prepared and used to fabricate PVDF/CoFe₂O₄/g-C₃N₄ composite films. The structural and compositional details of crystalline CoFe₂O₄ nanoparticles and the composite films were analysed, along with the fraction of β-phase PVDF. The morphological, magnetic, and dielectric properties of the films were studied using field emission scanning electron microscopy, vibrating sample magnetometry, and LCR measurement respectively. XPS analysis of filler material shows the existence of moderate oxygen vacancy defects and oxygen lattice sites. It is observed the prepared composite film has high electroactive β phase with F(β) of 51 %, 42.4 % of oxygen vacancy defects, moderate saturation magnetization, high coercivity of 1469 Oe, significant magnetic hysteresis, dielectric constant of 26.5 and moderate dielectric loss, all these multi-functional properties reveal that the composite films are capable to shield Electromagnetic (EM) wave and useful for gas sensing applications.

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用于多功能应用的 PVDF/ CoFe2O4/g-C3N4 纳米复合薄膜的制备与表征

聚合物纳米复合材料以其优异的柔韧性、铁电性、铁磁性、化学传感、压电性、热释电性和流变性能，在生物医学工程、储能、发电、机器人与自动化、电磁屏蔽、航空航天和国防等领域发挥着至关重要的作用。本文讨论了以铁酸钴（CoFe2O4）和石墨氮化碳（g-C3N4）为填料，以聚偏氟乙烯（PVDF）为基体制备聚合物纳米复合薄膜及其表征。制备了结晶CoFe2O4纳米颗粒和g-C3N4，并将其用于PVDF/CoFe2O4/g-C3N4复合膜的制备。分析了晶体CoFe2O4纳米颗粒和复合膜的结构和组成细节，以及β相PVDF的含量。利用场发射扫描电镜、振动样品磁强计和LCR测量分别研究了膜的形态、磁性和介电性能。XPS分析表明，填充材料存在中等氧空位缺陷和氧点阵位。结果表明，制备的复合膜具有高电活性β相，F（β）为51%，氧空缺缺陷为42.4%，饱和磁化强度适中，矫顽力为1469 Oe，磁滞率显著，介电常数为26.5，介电损耗适中，具有屏蔽电磁波的功能，可用于气敏应用。

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来源期刊

Journal of Magnetism and Magnetic Materials 物理-材料科学：综合

CiteScore

5.30

自引率

11.10%

发文量

1149

审稿时长

59 days

期刊介绍： The Journal of Magnetism and Magnetic Materials provides an important forum for the disclosure and discussion of original contributions covering the whole spectrum of topics, from basic magnetism to the technology and applications of magnetic materials. The journal encourages greater interaction between the basic and applied sub-disciplines of magnetism with comprehensive review articles, in addition to full-length contributions. In addition, other categories of contributions are welcome, including Critical Focused issues, Current Perspectives and Outreach to the General Public. Main Categories: Full-length articles: Technically original research documents that report results of value to the communities that comprise the journal audience. The link between chemical, structural and microstructural properties on the one hand and magnetic properties on the other hand are encouraged. In addition to general topics covering all areas of magnetism and magnetic materials, the full-length articles also include three sub-sections, focusing on Nanomagnetism, Spintronics and Applications. The sub-section on Nanomagnetism contains articles on magnetic nanoparticles, nanowires, thin films, 2D materials and other nanoscale magnetic materials and their applications. The sub-section on Spintronics contains articles on magnetoresistance, magnetoimpedance, magneto-optical phenomena, Micro-Electro-Mechanical Systems (MEMS), and other topics related to spin current control and magneto-transport phenomena. The sub-section on Applications display papers that focus on applications of magnetic materials. The applications need to show a connection to magnetism. Review articles: Review articles organize, clarify, and summarize existing major works in the areas covered by the Journal and provide comprehensive citations to the full spectrum of relevant literature.