Enhanced Study of Magnetic Properties of Polyvinyl Alcohol-Coated Superparamagnetic Iron Oxide Nanoparticles Below Blocking Temperatures

IF 0.9 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS

Powder Metallurgy and Metal Ceramics Pub Date : 2023-10-20 DOI:10.1007/s11106-023-00368-3

Bandana Gogoi, Upamanyu Das

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Abstract

Superparamagnetic iron oxide nanoparticles (SPIONs) coated with the synthetic hydrophilic biocompatible polymer polyvinyl alcohol were synthesized using the aqueous method. Static and dynamic magnetization processes were investigated for surface-modified SPIONs by analyzing the magnetization study at constant and varying magnetic fields. The magnetization on the applied magnetic field (M–H) and the magnetization dependent on temperature (M–T) were investigated. The temperature dependence of the complex susceptibility of SPIONs was investigated by measuring the in-phase (natural) and out-of-phase (imaginary) components of the susceptibility value at a frequency of 10 Hz and a very low magnetizing field. The XRD study shows diffraction peaks consistent with the magnetite (Fe₃O₄) phase of SPIONPs. FTIR, DSC, and TGA studies confirm the functional groups and stability of the coated nanoparticles. The magnetizing field cycle study at various constant temperatures (10, 100, and 300 K) shows the high magnetization value of polyvinyl alcohol-coated SPIONs with superparamagnetic states at and above 300 K. The effect of interparticle interaction on blocking temperature has been interpreted from FC/ZFC curves drawn at different DC magnetizing field values by varying temperature between 10 and 300 K.

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封闭温度下聚乙烯醇包覆超顺磁性氧化铁纳米粒子磁性的增强研究

采用水溶液法合成了以合成亲水性生物相容性高分子聚乙烯醇为载体的超顺磁性氧化铁纳米粒子。通过分析在恒定和变化磁场下的磁化研究，研究了表面改性SPION的静态和动态磁化过程。研究了外加磁场的磁化强度（M–H）和与温度相关的磁化强度。通过在10Hz的频率和非常低的磁化场下测量磁化率值的同相（自然）和异相（虚）分量，研究了SPION复磁化率的温度依赖性。XRD研究显示衍射峰与SPIONPs的磁铁矿（Fe3O4）相一致。FTIR、DSC和TGA研究证实了涂层纳米颗粒的官能团和稳定性。在各种恒定温度（10、100和300K）下的磁化场循环研究表明，在300K及以上具有超顺磁状态的聚乙烯醇包覆SPION具有高磁化值。通过在10和300K之间改变温度，在不同直流磁场值下绘制FC/ZFC曲线，解释了粒子间相互作用对阻塞温度的影响。

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来源期刊

Powder Metallurgy and Metal Ceramics 工程技术-材料科学：硅酸盐

CiteScore

1.90

自引率

20.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Powder Metallurgy and Metal Ceramics covers topics of the theory, manufacturing technology, and properties of powder; technology of forming processes; the technology of sintering, heat treatment, and thermo-chemical treatment; properties of sintered materials; and testing methods.