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Gold-Nanoparticle-Deposited TiO(2) Nanorod/Poly(Vinylidene Fluoride) Composites with Enhanced Dielectric Performance

Flexible dielectric polymer composites have been of great interest as embedded capacitor materials in the electronic industry. However, a polymer composite has a low relative dielectric permittivity (ε′ < 100), while its dielectric loss tangent is generally large (tanδ > 0.1). In this study, w...

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Autores principales: Kum-onsa, Pornsawan, Chanlek, Narong, Manyam, Jedsada, Thongbai, Prasit, Harnchana, Viyada, Phromviyo, Nutthakritta, Chindaprasirt, Prinya
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8271968/
https://www.ncbi.nlm.nih.gov/pubmed/34201841
http://dx.doi.org/10.3390/polym13132064
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author Kum-onsa, Pornsawan
Chanlek, Narong
Manyam, Jedsada
Thongbai, Prasit
Harnchana, Viyada
Phromviyo, Nutthakritta
Chindaprasirt, Prinya
author_facet Kum-onsa, Pornsawan
Chanlek, Narong
Manyam, Jedsada
Thongbai, Prasit
Harnchana, Viyada
Phromviyo, Nutthakritta
Chindaprasirt, Prinya
author_sort Kum-onsa, Pornsawan
collection PubMed
description Flexible dielectric polymer composites have been of great interest as embedded capacitor materials in the electronic industry. However, a polymer composite has a low relative dielectric permittivity (ε′ < 100), while its dielectric loss tangent is generally large (tanδ > 0.1). In this study, we fabricate a novel, high-permittivity polymer nanocomposite system with a low tanδ. The nanocomposite system comprises poly(vinylidene fluoride) (PVDF) co-filled with Au nanoparticles and semiconducting TiO(2) nanorods (TNRs) that contain Ti(3+) ions. To homogeneously disperse the conductive Au phase, the TNR surface was decorated with Au-NPs ~10–20 nm in size (Au-TNRs) using a modified Turkevich method. The polar β-PVDF phase was enhanced by the incorporation of the Au nanoparticles, partially contributing to the enhanced ε′ value. The introduction of the Au-TNRs in the PVDF matrix provided three-phase Au-TNR/PVDF nanocomposites with excellent dielectric properties (i.e., high ε′ ≈ 157 and low tanδ ≈ 0.05 at 1.8 vol% of Au and 47.4 vol% of TNRs). The ε′ of the three-phase Au-TNR/PVDF composite is ~2.4-times higher than that of the two-phase TNR/PVDF composite, clearly highlighting the primary contribution of the Au nanoparticles at similar filler loadings. The volume fraction dependence of ε′ is in close agreement with the effective medium percolation theory model. The significant enhancement in ε′ was primarily caused by interfacial polarization at the PVDF–conducting Au nanoparticle and PVDF–semiconducting TNR interfaces, as well as by the induced β-PVDF phase. A low tanδ was achieved due to the inhibited conducting pathway formed by direct Au nanoparticle contact.
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spelling pubmed-82719682021-07-11 Gold-Nanoparticle-Deposited TiO(2) Nanorod/Poly(Vinylidene Fluoride) Composites with Enhanced Dielectric Performance Kum-onsa, Pornsawan Chanlek, Narong Manyam, Jedsada Thongbai, Prasit Harnchana, Viyada Phromviyo, Nutthakritta Chindaprasirt, Prinya Polymers (Basel) Article Flexible dielectric polymer composites have been of great interest as embedded capacitor materials in the electronic industry. However, a polymer composite has a low relative dielectric permittivity (ε′ < 100), while its dielectric loss tangent is generally large (tanδ > 0.1). In this study, we fabricate a novel, high-permittivity polymer nanocomposite system with a low tanδ. The nanocomposite system comprises poly(vinylidene fluoride) (PVDF) co-filled with Au nanoparticles and semiconducting TiO(2) nanorods (TNRs) that contain Ti(3+) ions. To homogeneously disperse the conductive Au phase, the TNR surface was decorated with Au-NPs ~10–20 nm in size (Au-TNRs) using a modified Turkevich method. The polar β-PVDF phase was enhanced by the incorporation of the Au nanoparticles, partially contributing to the enhanced ε′ value. The introduction of the Au-TNRs in the PVDF matrix provided three-phase Au-TNR/PVDF nanocomposites with excellent dielectric properties (i.e., high ε′ ≈ 157 and low tanδ ≈ 0.05 at 1.8 vol% of Au and 47.4 vol% of TNRs). The ε′ of the three-phase Au-TNR/PVDF composite is ~2.4-times higher than that of the two-phase TNR/PVDF composite, clearly highlighting the primary contribution of the Au nanoparticles at similar filler loadings. The volume fraction dependence of ε′ is in close agreement with the effective medium percolation theory model. The significant enhancement in ε′ was primarily caused by interfacial polarization at the PVDF–conducting Au nanoparticle and PVDF–semiconducting TNR interfaces, as well as by the induced β-PVDF phase. A low tanδ was achieved due to the inhibited conducting pathway formed by direct Au nanoparticle contact. MDPI 2021-06-23 /pmc/articles/PMC8271968/ /pubmed/34201841 http://dx.doi.org/10.3390/polym13132064 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Kum-onsa, Pornsawan
Chanlek, Narong
Manyam, Jedsada
Thongbai, Prasit
Harnchana, Viyada
Phromviyo, Nutthakritta
Chindaprasirt, Prinya
Gold-Nanoparticle-Deposited TiO(2) Nanorod/Poly(Vinylidene Fluoride) Composites with Enhanced Dielectric Performance
title Gold-Nanoparticle-Deposited TiO(2) Nanorod/Poly(Vinylidene Fluoride) Composites with Enhanced Dielectric Performance
title_full Gold-Nanoparticle-Deposited TiO(2) Nanorod/Poly(Vinylidene Fluoride) Composites with Enhanced Dielectric Performance
title_fullStr Gold-Nanoparticle-Deposited TiO(2) Nanorod/Poly(Vinylidene Fluoride) Composites with Enhanced Dielectric Performance
title_full_unstemmed Gold-Nanoparticle-Deposited TiO(2) Nanorod/Poly(Vinylidene Fluoride) Composites with Enhanced Dielectric Performance
title_short Gold-Nanoparticle-Deposited TiO(2) Nanorod/Poly(Vinylidene Fluoride) Composites with Enhanced Dielectric Performance
title_sort gold-nanoparticle-deposited tio(2) nanorod/poly(vinylidene fluoride) composites with enhanced dielectric performance
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8271968/
https://www.ncbi.nlm.nih.gov/pubmed/34201841
http://dx.doi.org/10.3390/polym13132064
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