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Study of Electromagnetic Properties of Fabricated NiFe 2 O 4 /Polyurethane Nanocomposites
Author(s) -
Agarwal Kavita,
Prasad Mahender,
Katiyar Mohit,
Jaiswal Rimpa,
Kumar Subodh,
Prasad N Eswara
Publication year - 2020
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.48645
Subject(s) - materials science , nanocomposite , thermogravimetric analysis , composite material , differential scanning calorimetry , polyurethane , scanning electron microscope , chemical engineering , physics , engineering , thermodynamics
Nickel ferrite loaded (NiFe 2 O 4 ) segmented polyurethane (SPU) nanocomposites prepared by melt mixing method using microcompounder at temperature 185 °C in recirculation mode to ensure proper dispersion and distribution of nanoparticles at optimized residency time of 5 min. Three different weight percentages of nanocomposites (3, 5, and 10 wt %) was prepared and studied the electromagnetic property of nanocomposites obtained from complex permittivity and permeability. The effect of nanofiller (NiFe 2 O 4 ) has been studied to assess their thermal properties using thermogravimetric analysis, differential scanning calorimetry, and thermomechanical analysis. The nanocomposites (NiFe 2 O 4 /SPU) have further been studied using FE‐SEM, and the micrographs show embedded NiFe 2 O 4 filler uniformly dispersed in SPU matrix without agglomeration (size 20–40 nm). It is also evident that further loading of nanofiller resulted in saturation effect yielding no applicable change in thermal behavior and revealed lesser melting enthalpy due to the coalescence of the nanofillers. X‐ray diffraction and vibrating sample magnetometer also support the formation of the nanocomposite. The electric and magnetic properties of NiFe 2 O 4 incorporated nanocomposite (NiFe 2 O 4 /SPU) may have potential application in microwave absorption. © 2020 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 137 , 48645.