455889 Electromagnetic Wave Absorbing Polymer Nanocomposites

Tuesday, November 15, 2016: 8:30 AM
Golden Gate 5 (Hilton San Francisco Union Square)
Qingliang He1, Jiang Guo1, Alexandra Galaska1, Hu Liu2, Xingru Yan1, Hailong Lyu1,3, Jiurong Liu3, Kunlun Hong4 and Zhanhu Guo1, (1)Integrated Composites Laboratory (ICL), Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN, (2)Materials Science and Engineering, Zhengzhou University, Zhengzhou, China, (3)School of Materials Science and Engineering, Shandong University, Jinan, China, (4)Center for Nanophase Materials Science, Oak Ridge National Laboratory, Oak Ridge, TN

Multifunctional polymer matrix nanocomposites filled with nanofillers including iron nanoparticles, carbon nanotubes, graphene nanoplatelets, and the carbon nanotubes coated with magnetic iron oxide nanoparticles were prepared for microwave absorption at gigahertz frequency range. Surface treatment/functionalization with surfactant was used to improve the nanoparticle dispersion quality and then to enhance the microwave absorption performance. Relative complex permittivity and relative complex permeability are investigated and the corresponding microwave absorption efficiency were calculated within the tested frequency ranging from 2 - 20 GHz. Results indicate that silica coated iron core-shell nanoparticles were found to be able to reduce the eddy current effect of untreated iron nanoparticles in the polymer matrix. Meanwhile, carbon nanotubes coated with iron oxide nanoparticles could improve the matching between magnetic and dielectric loss for enhanced microwave absorption. Other fillers like graphene nanoplatelets with high microwave absorption efficiency were also studied and discussed in details.

References:

1) Electromagnetic Field Absorbing Polypropylene Nanocomposites with Tuned Permittivity and Permeability by Nanoiron and Carbon Nanotubes, Journal of Physical Chemistry C, 118(42) 24784-24796 (2014). pdf

2) Electromagnetic Field Shielding Polyurethane Nanocomposites Reinforced with Core-Shell Fe-Silica Nanoparticles,  Journal of Physical Chemistry C, 115, 15304-15310 (2011). pdf

3) Magnetic and Electromagnetic Evaluation of the Magnetic Nanoparticle Filled Polyurethane Nanocomposites, Journal of Applied Physics, 10, 09M511 (2007). pdf


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See more of this Session: Multifunctional Composites
See more of this Group/Topical: Materials Engineering and Sciences Division