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Curing Epoxy With Electrochemically Synthesized Nixfe3- Xo4 Magnetic Nanoparticles Publisher



Jouyandeh M1, 2 ; Ganjali MR1, 3 ; Ali JA4 ; Aghazadeh M1 ; Stadler FJ5 ; Saeb MR6
Authors
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Authors Affiliations
  1. 1. Center of Excellence in Electrochemistry, School of Chemistry, College of Science, University of Tehran, Tehran, Iran
  2. 2. Advanced Materials Group, Iranian Color Society (ICS), P.O. Box 1591637144, Tehran, Iran
  3. 3. Biosensor Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. Department of Petroleum Engineering, Faculty of Engineering, Soran University, Kurdistan Region, Iraq
  5. 5. College of Materials Science and Engineering, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, Nanshan District Key Lab for Biopolymers and Safety Evaluation, Shenzhen University, Shenzhen, 518055, China
  6. 6. Department of Resin and Additives, Institute for Color Science and Technology, P.O. Box: 16765-654, Tehran, Iran

Source: Progress in Organic Coatings Published:2019


Abstract

Fe3O4 magnetic nanoparticles (MNPs) were synthesized via cathodic electrodeposition in the form of undoped and Ni2+-doped MNPs, and their curing potential towards epoxy was discussed. Partial substitution of Fe2+ sites by Ni2+ cations in the general formula of NiXFe3- XO4 was confirmed by – X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), dispersive X-ray spectrometry (EDS), and vibrating sample magnetometry (VSM). Low-filled epoxy/Fe3O4 and epoxy/Ni2+-Fe3O4 nanocomposites containing 0.1 wt.% MNPs based on 100 parts by weight of epoxy resin were prepared and underwent nonisothermal differential calorimetry (DSC) at different heating rates (5, 10, 15, and 20 °C/min). The curability of the well-characterized nanocomposites of epoxy/Ni0.11Fe2.89O4 was qualitatively studied by the use of Cure Index. Overall, structural changes in Fe3O4 atomic structure resulting from the replacement of Fe2+ cations with Ni2+ had effect on epoxy curing reactions, as reflected in a shift in curing state from Poor for epoxy/Fe3O4 to Good for epoxy/Ni2+-doped Fe3O4 systems. This phenomenon was explained on account of the fact that Ni2+ dopants with their laminar structure tend to locate in the top layer of Fe3O4, which dramatically increases the activity of Fe3O4 to take electron pair of epoxy to open epoxy ring. © 2019 Elsevier B.V.
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