Accession Number:

ADA582080

Title:

Study of Electromagnetic Wave Absorption Properties of Carbon Nanotubes-Based Composites

Descriptive Note:

Final rept. 1 Dec 2011-30 Nov 2012

Corporate Author:

SOUTHERN UNIV AND A AND M COLL BATON ROUGE LA

Personal Author(s):

Report Date:

2012-11-29

Pagination or Media Count:

9.0

Abstract:

During the period from 1212011 to 11302012, this research project mainly focused on the following three major tasks. These include 1 establishing a broadband electromagnetic EM wave absorption properties measurement system for a frequency region from 100 MHz to 20 GHz 2 fabrications of multiwalled carbon nanotubes MWCNTs-epoxy composites samples for EM wave properties measurements and 3 studies of broadband EM wave absorption properties of the CNT-polymer composite samples, by utilizing the newly established measurement system. We fabricated multi-walled carbon nanotubes MWCNTs-epoxy composite samples, using MWCNTs with an average outer diameter OD less than 8 nm. The weight fraction of MWCNTs in the CNT-epoxy composite samples was controlled as 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10wt . We utilized an Agilent Vector Network Analyzer N5230C, coaxial transmission method, and Agilent 85071 material measurement software to study the EM wave absorption properties of the CNT-epoxy composite samples for a frequency range from 2 to 20 GHz. We successfully measured the complex permittivity and permeability , which are the fundamental physical quantities. We have also developed a new method to calculate the absorption ratio of the MWCNTs-epoxy composite samples in the first time in the research. We further analyzed the absorption properties of MWCNTs-epoxy composite samples.

Subject Categories:

  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE