离子液体基铁磁流体的新型配方：磁性能研究

Novel Formulation of Ionic Liquid-Based Ferrofluids: Investigation of the Magnetic Properties.

作者信息

Talone Alessandro, Maltoni Pierfrancesco, Casale Michael, Abdolrahimi Maryam, Slimani Sawssen, Colombara Diego, Leoncino Luca, Imperatori Patrizia, Laureti Sara, Varvaro Gaspare, Peddis Davide

机构信息

Institute of Structure of Matter (ISM), nM2-Lab, National Research Council (CNR), Via Salaria, Km 29.300, Monterotondo Scalo, Rome 00015, Italy.

Department of Science, University of Rome Tre, via Della Vasca Navale 84, Rome 00146, Italy.

出版信息

Langmuir. 2025 May 20;41(19):11977-11986. doi: 10.1021/acs.langmuir.5c00403. Epub 2025 May 7.

DOI:10.1021/acs.langmuir.5c00403

PMID:40333025

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12100712/

Abstract

This study establishes a viable process to prepare hybrid nanomaterials comprising stable ionic liquid-based ferrofluids (IL-FFs) with tunable magnetic anisotropy and reduced water contamination, where the latter strongly decreases the colloidal stability of the system. Spinel iron oxide magnetic nanoparticles (MNPs) with different compositions (γ-FeO, CoZnFeO, and CoFeO) and different magnetic anisotropies were synthesized by the polyol method. The particles were coated with dihydrocaffeic acid (DHCA) in tetrahydrofuran (THF) and subsequently transferred directly to 3-ethyl-1-methylimidazolium acetate (EMIMAc), exploring the synergy between intermolecular and covalent bonding to obtain stable dispersions. The evolution of magnetic properties from powder to IL-FFs systems was investigated, allowing us to highlight the synergistic influence of interparticle interaction and magnetic anisotropy on the magnetization dynamics of the nanoparticles.

摘要

本研究建立了一种可行的方法来制备混合纳米材料，该材料包含具有可调磁各向异性且水污染减少的稳定离子液体基铁磁流体（IL-FFs），水污染会强烈降低系统的胶体稳定性。通过多元醇法合成了具有不同组成（γ-FeO、CoZnFeO和CoFeO）和不同磁各向异性的尖晶石型氧化铁磁性纳米颗粒（MNPs）。这些颗粒在四氢呋喃（THF）中用二氢咖啡酸（DHCA）包覆，随后直接转移到乙酸3-乙基-1-甲基咪唑鎓（EMIMAc）中，探索分子间键合和共价键合之间的协同作用以获得稳定的分散体。研究了从粉末到IL-FFs系统的磁性演变，这使我们能够突出颗粒间相互作用和磁各向异性对纳米颗粒磁化动力学的协同影响。