Flexible reduced graphene oxide/polyacrylonitrile dielectric nanocomposite films for high-temperature electronics applications

Polymer dielectrics possess excellent flexibility compared with inorganic ceramic materials. However, the relatively low dielectric constant and working temperature significantly constrain their widespread application. Here, we report a low-cost facile strategy to develop flexible polymer-based comp...

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Main Authors:	Yaotian Su, Wenqing Zhang, Jinle Lan, Gang Sui, Hongtao Zhang, Xiaoping Yang
Format:	Default Article
Published:	2020
Subjects:	Dielectrics Polyacrylonitrile Reduced graphene oxide Coaxial electrospinning High-temperature performance
Online Access:	https://hdl.handle.net/2134/12619670.v1
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id	rr-article-12619670
record_format	Figshare
spelling	rr-article-126196702020-06-22T00:00:00Z Flexible reduced graphene oxide/polyacrylonitrile dielectric nanocomposite films for high-temperature electronics applications Yaotian Su (8668038) Wenqing Zhang (56658) Jinle Lan (2135185) Gang Sui (2946174) Hongtao Zhang (1252689) Xiaoping Yang (460478) Dielectrics Polyacrylonitrile Reduced graphene oxide Coaxial electrospinning High-temperature performance Polymer dielectrics possess excellent flexibility compared with inorganic ceramic materials. However, the relatively low dielectric constant and working temperature significantly constrain their widespread application. Here, we report a low-cost facile strategy to develop flexible polymer-based composite films with high dielectric constant over a broad temperature. Polyacrylonitrile (PAN) nanofiber mats containing graphene oxide (GO) with core–shell microstructure were first prepared via coaxial electrospinning and then hot-pressed into dense composite films. It was revealed that hot-pressing assisted by a stretching force under appropriate temperature and pressure can generate local conformational changes of PAN, leading to the formation of an electroactive phase with increased dielectric constant. Meanwhile, the GO transformed into reduced graphene oxide (rGO) under heat reduction, serving as conductive nanofillers to further promote the increase of dielectric constant. Consequently, the optimized rGO/PAN composites displayed thermally stable dielectric properties with a high dielectric constant (ε′ = 23, 80 °C; ε′ = 40, 150 °C) and low loss (tan δ = 0.13, 80 °C; tan δ = 0.55, 150 °C) over a broad temperature range. This work offers an efficient method for the synthesis of flexible composite dielectric films that hold great potential in high-temperature electronic applications. 2020-06-22T00:00:00Z Text Journal contribution 2134/12619670.v1 https://figshare.com/articles/journal_contribution/Flexible_reduced_graphene_oxide_polyacrylonitrile_dielectric_nanocomposite_films_for_high-temperature_electronics_applications/12619670 CC BY-NC-ND 4.0
institution	Loughborough University
collection	Figshare
topic	Dielectrics Polyacrylonitrile Reduced graphene oxide Coaxial electrospinning High-temperature performance
spellingShingle	Dielectrics Polyacrylonitrile Reduced graphene oxide Coaxial electrospinning High-temperature performance Yaotian Su Wenqing Zhang Jinle Lan Gang Sui Hongtao Zhang Xiaoping Yang Flexible reduced graphene oxide/polyacrylonitrile dielectric nanocomposite films for high-temperature electronics applications
description	Polymer dielectrics possess excellent flexibility compared with inorganic ceramic materials. However, the relatively low dielectric constant and working temperature significantly constrain their widespread application. Here, we report a low-cost facile strategy to develop flexible polymer-based composite films with high dielectric constant over a broad temperature. Polyacrylonitrile (PAN) nanofiber mats containing graphene oxide (GO) with core–shell microstructure were first prepared via coaxial electrospinning and then hot-pressed into dense composite films. It was revealed that hot-pressing assisted by a stretching force under appropriate temperature and pressure can generate local conformational changes of PAN, leading to the formation of an electroactive phase with increased dielectric constant. Meanwhile, the GO transformed into reduced graphene oxide (rGO) under heat reduction, serving as conductive nanofillers to further promote the increase of dielectric constant. Consequently, the optimized rGO/PAN composites displayed thermally stable dielectric properties with a high dielectric constant (ε′ = 23, 80 °C; ε′ = 40, 150 °C) and low loss (tan δ = 0.13, 80 °C; tan δ = 0.55, 150 °C) over a broad temperature range. This work offers an efficient method for the synthesis of flexible composite dielectric films that hold great potential in high-temperature electronic applications.
format	Default Article
author	Yaotian Su Wenqing Zhang Jinle Lan Gang Sui Hongtao Zhang Xiaoping Yang
author_facet	Yaotian Su Wenqing Zhang Jinle Lan Gang Sui Hongtao Zhang Xiaoping Yang
author_sort	Yaotian Su (8668038)
title	Flexible reduced graphene oxide/polyacrylonitrile dielectric nanocomposite films for high-temperature electronics applications
title_short	Flexible reduced graphene oxide/polyacrylonitrile dielectric nanocomposite films for high-temperature electronics applications
title_full	Flexible reduced graphene oxide/polyacrylonitrile dielectric nanocomposite films for high-temperature electronics applications
title_fullStr	Flexible reduced graphene oxide/polyacrylonitrile dielectric nanocomposite films for high-temperature electronics applications
title_full_unstemmed	Flexible reduced graphene oxide/polyacrylonitrile dielectric nanocomposite films for high-temperature electronics applications
title_sort	flexible reduced graphene oxide/polyacrylonitrile dielectric nanocomposite films for high-temperature electronics applications
publishDate	2020
url	https://hdl.handle.net/2134/12619670.v1
_version_	1799271563589058560

Flexible reduced graphene oxide/polyacrylonitrile dielectric nanocomposite films for high-temperature electronics applications

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