The tunable permittivity of multi-walled carbon nanotubes/silver nanoparticles reinforced polyvinyl alcohol (PVA) nanocomposites at low frequency
This paper is about tailoring high permittivity of multi-walled carbon nanotubes/silver nanoparticles (MWNT-AgNP) filled polyvinyl alcohol (PVA) nanocomposites at low frequency. PVA/MWNT-AgNP nanocomposites were synthesized via solution-casting technique at low MWNT content with different loading of...
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| Format: | Article |
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IOP Publishing
2018
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| _version_ | 1796960840905129984 |
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| author | Yusof, Yusliza Ng, Zi Yi Wong, Yew Hoong Johan, Mohd Rafie |
| author_facet | Yusof, Yusliza Ng, Zi Yi Wong, Yew Hoong Johan, Mohd Rafie |
| author_sort | Yusof, Yusliza |
| collection | UM |
| description | This paper is about tailoring high permittivity of multi-walled carbon nanotubes/silver nanoparticles (MWNT-AgNP) filled polyvinyl alcohol (PVA) nanocomposites at low frequency. PVA/MWNT-AgNP nanocomposites were synthesized via solution-casting technique at low MWNT content with different loading of AgNP. The nanocomposites showed a significant increment in ac conductivity, σ ac, and dielectric permittivity, ϵ′ by two orders of magnitude as compared to pure PVA. The maximum ϵ′ value was achieved about 600 at 1.0 wt% of AgNP due to the increased charge carriers density and high interfacial polarization within the nanocomposites. The relaxation frequency was shifted towards a higher value with the increased of AgNP content while the relaxation time was decreased by 40%. Field emission scanning electron microscopy (FESEM) images showed the enhanced distribution of MWNT in the presence of AgNP to provide conductive pathways in the matrix. This was confirmed by energy-dispersive x-ray (EDX) analysis and ultraviolet-visible (UV-vis) spectroscopy. As a result, PVA/MWNT-AgNP nanocomposites have great potential for electrical applications such as cable accessories, high charge-storage capacitor and electromagnetic interference shielding materials. |
| first_indexed | 2024-03-06T05:50:36Z |
| format | Article |
| id | um.eprints-20233 |
| institution | Universiti Malaya |
| last_indexed | 2024-03-06T05:50:36Z |
| publishDate | 2018 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | um.eprints-202332019-01-30T03:59:06Z http://eprints.um.edu.my/20233/ The tunable permittivity of multi-walled carbon nanotubes/silver nanoparticles reinforced polyvinyl alcohol (PVA) nanocomposites at low frequency Yusof, Yusliza Ng, Zi Yi Wong, Yew Hoong Johan, Mohd Rafie TJ Mechanical engineering and machinery This paper is about tailoring high permittivity of multi-walled carbon nanotubes/silver nanoparticles (MWNT-AgNP) filled polyvinyl alcohol (PVA) nanocomposites at low frequency. PVA/MWNT-AgNP nanocomposites were synthesized via solution-casting technique at low MWNT content with different loading of AgNP. The nanocomposites showed a significant increment in ac conductivity, σ ac, and dielectric permittivity, ϵ′ by two orders of magnitude as compared to pure PVA. The maximum ϵ′ value was achieved about 600 at 1.0 wt% of AgNP due to the increased charge carriers density and high interfacial polarization within the nanocomposites. The relaxation frequency was shifted towards a higher value with the increased of AgNP content while the relaxation time was decreased by 40%. Field emission scanning electron microscopy (FESEM) images showed the enhanced distribution of MWNT in the presence of AgNP to provide conductive pathways in the matrix. This was confirmed by energy-dispersive x-ray (EDX) analysis and ultraviolet-visible (UV-vis) spectroscopy. As a result, PVA/MWNT-AgNP nanocomposites have great potential for electrical applications such as cable accessories, high charge-storage capacitor and electromagnetic interference shielding materials. IOP Publishing 2018 Article PeerReviewed Yusof, Yusliza and Ng, Zi Yi and Wong, Yew Hoong and Johan, Mohd Rafie (2018) The tunable permittivity of multi-walled carbon nanotubes/silver nanoparticles reinforced polyvinyl alcohol (PVA) nanocomposites at low frequency. Materials Research Express, 5 (8). 085604. ISSN 2053-1591, DOI https://doi.org/10.1088/2053-1591/aad442 <https://doi.org/10.1088/2053-1591/aad442>. https://doi.org/10.1088/2053-1591/aad442 doi:10.1088/2053-1591/aad442 |
| spellingShingle | TJ Mechanical engineering and machinery Yusof, Yusliza Ng, Zi Yi Wong, Yew Hoong Johan, Mohd Rafie The tunable permittivity of multi-walled carbon nanotubes/silver nanoparticles reinforced polyvinyl alcohol (PVA) nanocomposites at low frequency |
| title | The tunable permittivity of multi-walled carbon nanotubes/silver nanoparticles reinforced polyvinyl alcohol (PVA) nanocomposites at low frequency |
| title_full | The tunable permittivity of multi-walled carbon nanotubes/silver nanoparticles reinforced polyvinyl alcohol (PVA) nanocomposites at low frequency |
| title_fullStr | The tunable permittivity of multi-walled carbon nanotubes/silver nanoparticles reinforced polyvinyl alcohol (PVA) nanocomposites at low frequency |
| title_full_unstemmed | The tunable permittivity of multi-walled carbon nanotubes/silver nanoparticles reinforced polyvinyl alcohol (PVA) nanocomposites at low frequency |
| title_short | The tunable permittivity of multi-walled carbon nanotubes/silver nanoparticles reinforced polyvinyl alcohol (PVA) nanocomposites at low frequency |
| title_sort | tunable permittivity of multi walled carbon nanotubes silver nanoparticles reinforced polyvinyl alcohol pva nanocomposites at low frequency |
| topic | TJ Mechanical engineering and machinery |
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