Electromagnetic Shielding Properties of Iron Oxide Impregnated Kenaf Bast Fiberboard
The electromagnetic shielding effectiveness of kenaf bast fiber based composites with different iron oxide impregnation levels was investigated. The kenaf fibers were retted to remove the lignin and extractives from the pores in fibers, and then magnetized. Using the unsaturated polyester and the ma...
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ndltd-unt.edu-info-ark-67531-metadc6999982017-03-17T08:41:45Z Electromagnetic Shielding Properties of Iron Oxide Impregnated Kenaf Bast Fiberboard Ding, Zhiguang Electromagnetic signal shielding bioproduct natural fiber panel kenaf bast fiber Shielding (Electricity) Ferric oxide. Kenaf. Bast. Fiberboard. The electromagnetic shielding effectiveness of kenaf bast fiber based composites with different iron oxide impregnation levels was investigated. The kenaf fibers were retted to remove the lignin and extractives from the pores in fibers, and then magnetized. Using the unsaturated polyester and the magnetized fibers, kenaf fiber based composites were manufactured by compression molding process. The transmission energies of the composites were characterized when the composite samples were exposed under the irradiation of electromagnetic (EM) wave with a changing frequency from 9 GHz to 11 GHz. Using the scanning electron microscope (SEM), the iron oxide nanoparticles were observed on the surfaces and inside the micropore structures of single fibers. The SEM images revealed that the composite’s EM shielding effectiveness was increased due to the adhesion of the iron oxide crystals to the kenaf fiber surfaces. As the Fe content increased from 0% to 6.8%, 15.9% and 18.0%, the total surface free energy of kenaf fibers with magnetizing treat increased from 44.77 mJ/m2 to 46.07 mJ/m2, 48.78 mJ/m2 and 53.02 mJ/m2, respectively, while the modulus of elasticity (MOE) reduced from 2,875 MPa to 2,729 MPa, 2,487 MPa and 2,007 MPa, respectively. Meanwhile, the shielding effectiveness was increased from 30-50% to 60-70%, 65-75% and 70-80%, respectively. University of North Texas Shi, Sheldon Li, Xiaohua Zhang, Hualiang 2014-12 Thesis or Dissertation vi, 27 pages : illustrations (some color) Text https://digital.library.unt.edu/ark:/67531/metadc699998/ ark: ark:/67531/metadc699998 English Public Ding, Zhiguang Copyright Copyright is held by the author, unless otherwise noted. All rights reserved |
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English |
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Electromagnetic signal shielding bioproduct natural fiber panel kenaf bast fiber Shielding (Electricity) Ferric oxide. Kenaf. Bast. Fiberboard. |
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Electromagnetic signal shielding bioproduct natural fiber panel kenaf bast fiber Shielding (Electricity) Ferric oxide. Kenaf. Bast. Fiberboard. Ding, Zhiguang Electromagnetic Shielding Properties of Iron Oxide Impregnated Kenaf Bast Fiberboard |
description |
The electromagnetic shielding effectiveness of kenaf bast fiber based composites with different iron oxide impregnation levels was investigated. The kenaf fibers were retted to remove the lignin and extractives from the pores in fibers, and then magnetized. Using the unsaturated polyester and the magnetized fibers, kenaf fiber based composites were manufactured by compression molding process. The transmission energies of the composites were characterized when the composite samples were exposed under the irradiation of electromagnetic (EM) wave with a changing frequency from 9 GHz to 11 GHz. Using the scanning electron microscope (SEM), the iron oxide nanoparticles were observed on the surfaces and inside the micropore structures of single fibers. The SEM images revealed that the composite’s EM shielding effectiveness was increased due to the adhesion of the iron oxide crystals to the kenaf fiber surfaces. As the Fe content increased from 0% to 6.8%, 15.9% and 18.0%, the total surface free energy of kenaf fibers with magnetizing treat increased from 44.77 mJ/m2 to 46.07 mJ/m2, 48.78 mJ/m2 and 53.02 mJ/m2, respectively, while the modulus of elasticity (MOE) reduced from 2,875 MPa to 2,729 MPa, 2,487 MPa and 2,007 MPa, respectively. Meanwhile, the shielding effectiveness was increased from 30-50% to 60-70%, 65-75% and 70-80%, respectively. |
author2 |
Shi, Sheldon |
author_facet |
Shi, Sheldon Ding, Zhiguang |
author |
Ding, Zhiguang |
author_sort |
Ding, Zhiguang |
title |
Electromagnetic Shielding Properties of Iron Oxide Impregnated Kenaf Bast Fiberboard |
title_short |
Electromagnetic Shielding Properties of Iron Oxide Impregnated Kenaf Bast Fiberboard |
title_full |
Electromagnetic Shielding Properties of Iron Oxide Impregnated Kenaf Bast Fiberboard |
title_fullStr |
Electromagnetic Shielding Properties of Iron Oxide Impregnated Kenaf Bast Fiberboard |
title_full_unstemmed |
Electromagnetic Shielding Properties of Iron Oxide Impregnated Kenaf Bast Fiberboard |
title_sort |
electromagnetic shielding properties of iron oxide impregnated kenaf bast fiberboard |
publisher |
University of North Texas |
publishDate |
2014 |
url |
https://digital.library.unt.edu/ark:/67531/metadc699998/ |
work_keys_str_mv |
AT dingzhiguang electromagneticshieldingpropertiesofironoxideimpregnatedkenafbastfiberboard |
_version_ |
1718432927479496704 |