Journal
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
Volume 34, Issue 1, Pages 201-210Publisher
SPRINGER
DOI: 10.1007/s10948-020-05669-x
Keywords
Nanocomposites; EMI shielding; RGO; Barium ferrites; TPU
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BaFe and TRGO nanocomposites were successfully prepared and used to manufacture thin films with excellent electromagnetic interference shielding properties, particularly in the microwave frequency and near infrared wavelength ranges.
Barium hexaferrites (BaFe) and thermally reduced graphene oxide (TRGO) were successfully prepared by co-precipitation and improved hummer's method, respectively. Nanocomposite films based on the thermoplastic polyurethane (TPU) matrix with different compositions of TRGO and BaFe were prepared by a solution casting method with a thickness of 0.25 mm. Electromagnetic interference (EMI) shielding is the key application area of these nanocomposites in the microwave frequency range of 0.1-20 GHz and near infrared (NIR) wavelength range of 700-2500 nm. A maximum of 3.5*10(-5) S/cm AC conductivity and 4.8*10(-6) S/cm DC conductivity was achieved. The dielectric constant and dielectric loss also enhanced 2-3 times with respect to the pure TPU matrix. Less than 0.5% transmission in the NIR region and -40 dB shielding were observed in the microwave region. The highest shielding of -61 dB was achieved at frequency 12.5GHz.
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