Curing Epoxy With Electrochemically Synthesized Mnxfe3-Xo4 Magnetic Nanoparticles Publisher



Jouyandeh M^{1, 2} ; Ganjali MR^{1, 3} ; Ali JA⁴ ; Aghazadeh M¹ ; Stadler FJ⁵ ; Saeb MR⁶ Show Affiliations
Source: Progress in Organic Coatings Published:2019

Abstract

Typically, surface functionalization of nanoparticles was practised as a useful strategy to enhance curing of thermoset nanocomposites after gelation takes place. By contrast, modification of bulk composition of nanoparticles for crosslinking facilitation was not reported. In this work, manganese (Mn)-doped Fe3O4 magnetic nanoparticles were synthesized via cathodic electrodeposition and characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), dispersive X-ray spectrometry (EDAX), and vibrating sample magnetometry (VSM). Low-filled epoxy nanocomposites containing Fe3O4 and Mn2+-doped Fe3O4 were then prepared to study the effect of cationic exchange between the first main transition series of periodic table of elements (Fe2+ cations were replaced by Mn2+ cations in Fe3O4) on epoxy curing reaction with a linear aliphatic amine. Nonisothermal differential scanning calorimetry (DSC) was used to evaluate epoxy crosslinking. Cure Index demonstrated that Mn2+ cations played the role of catalyst in epoxy/amine curing reaction, so that a shift from Poor to Good and Excellent cure was detected. © 2019 Elsevier B.V.