Complex permittivity and microwave absorption properties of OPEFB fiber–polycaprolactone composites filled with recycled hematite (α-Fe2O3) nanoparticles
Recycled hematite (α-Fe2O3) nanoparticles with enhanced complex permittivity properties have been incorporated as a filler in a polycaprolactone (PCL) matrix reinforced with oil palm empty fruit bunch (OPEFB) fiber for microwave absorption applications. The complex permittivity values were improved...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI
2019
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| Online Access: | http://psasir.upm.edu.my/id/eprint/38367/1/38367.pdf |
| _version_ | 1796973332419051520 |
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| author | Mensah, Ebenezer Ekow Abbas, Zulkifly Azis, Raba'ah Syahidah Ibrahim, Nor Azowa Khamis, Ahmad Mamoun |
| author_facet | Mensah, Ebenezer Ekow Abbas, Zulkifly Azis, Raba'ah Syahidah Ibrahim, Nor Azowa Khamis, Ahmad Mamoun |
| author_sort | Mensah, Ebenezer Ekow |
| collection | UPM |
| description | Recycled hematite (α-Fe2O3) nanoparticles with enhanced complex permittivity properties have been incorporated as a filler in a polycaprolactone (PCL) matrix reinforced with oil palm empty fruit bunch (OPEFB) fiber for microwave absorption applications. The complex permittivity values were improved by reducing the particle sizes to the nano scale via high-energy ball milling for 12 h. A total of 5–20 wt.% recycled α-Fe2O3/OPEFB/PCL nanocomposites were examined for their complex permittivity and microwave absorption properties via the open ended coaxial (OEC) technique and the transmission/reflection line measurement using a microstrip connected to a two-port vector network analyzer. The microstructural analysis of the samples included X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM) and Fourier transform infrared spectroscopy (FTIR). At 1 GHz, the real (ε′) and imaginary (ε″) parts of complex permittivity of recycled α-Fe2O3 particles, respectively, increased from 7.88 to 12.75 and 0.14 to 0.40 when the particle size was reduced from 1.73 μm to 16.2 nm. A minimum reflection loss of −24.2 dB was achieved by the 20 wt.% nanocomposite at 2.4 GHz. Recycled α-Fe2O3 nanoparticles are effective fillers for microwave absorbing polymer-based composites in 1–4 GHz range applications. |
| first_indexed | 2024-03-06T08:41:05Z |
| format | Article |
| id | upm.eprints-38367 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T08:41:05Z |
| publishDate | 2019 |
| publisher | MDPI |
| record_format | dspace |
| spelling | upm.eprints-383672020-05-04T16:24:17Z http://psasir.upm.edu.my/id/eprint/38367/ Complex permittivity and microwave absorption properties of OPEFB fiber–polycaprolactone composites filled with recycled hematite (α-Fe2O3) nanoparticles Mensah, Ebenezer Ekow Abbas, Zulkifly Azis, Raba'ah Syahidah Ibrahim, Nor Azowa Khamis, Ahmad Mamoun Recycled hematite (α-Fe2O3) nanoparticles with enhanced complex permittivity properties have been incorporated as a filler in a polycaprolactone (PCL) matrix reinforced with oil palm empty fruit bunch (OPEFB) fiber for microwave absorption applications. The complex permittivity values were improved by reducing the particle sizes to the nano scale via high-energy ball milling for 12 h. A total of 5–20 wt.% recycled α-Fe2O3/OPEFB/PCL nanocomposites were examined for their complex permittivity and microwave absorption properties via the open ended coaxial (OEC) technique and the transmission/reflection line measurement using a microstrip connected to a two-port vector network analyzer. The microstructural analysis of the samples included X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM) and Fourier transform infrared spectroscopy (FTIR). At 1 GHz, the real (ε′) and imaginary (ε″) parts of complex permittivity of recycled α-Fe2O3 particles, respectively, increased from 7.88 to 12.75 and 0.14 to 0.40 when the particle size was reduced from 1.73 μm to 16.2 nm. A minimum reflection loss of −24.2 dB was achieved by the 20 wt.% nanocomposite at 2.4 GHz. Recycled α-Fe2O3 nanoparticles are effective fillers for microwave absorbing polymer-based composites in 1–4 GHz range applications. MDPI 2019 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/38367/1/38367.pdf Mensah, Ebenezer Ekow and Abbas, Zulkifly and Azis, Raba'ah Syahidah and Ibrahim, Nor Azowa and Khamis, Ahmad Mamoun (2019) Complex permittivity and microwave absorption properties of OPEFB fiber–polycaprolactone composites filled with recycled hematite (α-Fe2O3) nanoparticles. Polymers, 11 (5). art. no. 918. pp. 1-11. ISSN 2073-4360 https://www.mdpi.com/2073-4360/11/5/918 10.3390/polym11050918 |
| spellingShingle | Mensah, Ebenezer Ekow Abbas, Zulkifly Azis, Raba'ah Syahidah Ibrahim, Nor Azowa Khamis, Ahmad Mamoun Complex permittivity and microwave absorption properties of OPEFB fiber–polycaprolactone composites filled with recycled hematite (α-Fe2O3) nanoparticles |
| title | Complex permittivity and microwave absorption properties of OPEFB fiber–polycaprolactone composites filled with recycled hematite (α-Fe2O3) nanoparticles |
| title_full | Complex permittivity and microwave absorption properties of OPEFB fiber–polycaprolactone composites filled with recycled hematite (α-Fe2O3) nanoparticles |
| title_fullStr | Complex permittivity and microwave absorption properties of OPEFB fiber–polycaprolactone composites filled with recycled hematite (α-Fe2O3) nanoparticles |
| title_full_unstemmed | Complex permittivity and microwave absorption properties of OPEFB fiber–polycaprolactone composites filled with recycled hematite (α-Fe2O3) nanoparticles |
| title_short | Complex permittivity and microwave absorption properties of OPEFB fiber–polycaprolactone composites filled with recycled hematite (α-Fe2O3) nanoparticles |
| title_sort | complex permittivity and microwave absorption properties of opefb fiber polycaprolactone composites filled with recycled hematite α fe2o3 nanoparticles |
| url | http://psasir.upm.edu.my/id/eprint/38367/1/38367.pdf |
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