Microwave-shielding behavior of silanized Cu and Cu–Fe3O4 compound particle-reinforced epoxy resin composite in E-, F-, I-, and J-band frequencies

• Published in: Polymer bulletin (Berlin, Germany) Vol. 75; no. 9; pp. 4207 - 4225
• Main Authors: Arun Prakash, V. R., Viswanathan, R.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.09.2018; Springer Nature B.V
• Subjects: Ball milling; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Complex Fluids and Microfluidics; Composite materials; Copper; Epoxy resins; Fillers; Frequencies; Functional groups; Infrared spectroscopy; Iron oxides; Magnetic properties; Magnetic shielding; Mechanical alloying; Microwave attenuation; Molecular weight; Morphology; Organic Chemistry; Original Paper; Particle size; Particulate composites; Physical Chemistry; Polymer Sciences; Soft and Granular Matter; Spectrum analysis; Strain hardening; Surface treatment; Viscosity; Germany; India; Surface modification; Microwave shielding; Magnetite; Iron oxide; Polymer matrix composite; Fillers; Epoxy resin; TEM
• ISSN: 0170-0839; 1436-2449
• DOI: 10.1007/s00289-017-2262-1

In this work, microwave-shielding behavior of epoxy thermosetting plastic reinforced with silanized Cu and Cu–Fe 3 O 4 compound particles were studied in frequency bands E, F, I, and J. The principal aim of this work is to evaluate the significant advantage of surface-modified magnetic and conductive fillers over as-received fillers in microwave shielding. The conductive and magnetic properties of epoxy resin were improved by additions of Cu and Fe 3 O 4 particles. Compound particles of Cu–Fe 3 O 4 were produced by mechanical alloying process (ball milling). The compound particles were surface treated by 3-Aminopropyltrimethoxysilane (APTMS) for better dispersion in epoxy resin matrix. Functional groups on particle’s surface after silane surface treatment were confirmed by FT-IR spectra analysis. The TEM images revealed that effective Cu–Fe 3 O 4 particle compounding was formed at 1 h milling time. The maximum dielectric constant of 6.8 and magnetization of 675E −6 were observed for surface-modified compound particle-reinforced epoxy composite designation RCF 2 . Similarly, maximum microwave attenuation of 35% (44 dB) was observed for surface-modified compound particle-reinforced composite designation RCF 2 in ‘J’-band frequency.