Negative Capacitance in Nanocomposite Based on High-Density Polyethylene (HDPE) with Multiwalled Carbon Nanotubes (CNTs)

Negative capacitance (NC), already observed in conducting polymer-based nanocomposites, was recently reported and evidenced at low frequencies (

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Published in:Materials 2023-07, Vol.16 (14), p.4901
Main Authors: Mouecoucou, Raymonde, Bonnaud, Leïla, Dubois, Philippe
Format: Article
Language:English
Subjects:
Capacitance
Carbon fibers
Communication
Conducting polymers
Crystallites
Electrostatic discharges
Graphene
High density polyethylenes
Humidity
Impact strength
Low frequencies
Multi wall carbon nanotubes
Nanocomposites
Nanoparticles
Percolation
Polyethylene
Polymers
Polyvinyl alcohol
Space charge
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cited_by cdi_FETCH-LOGICAL-c407t-349d2911fe0fc12ee04739f0a2711f8baa107cb951e952e21a1fe8660d0496d23
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creator Mouecoucou, Raymonde
Bonnaud, Leïla
Dubois, Philippe
description Negative capacitance (NC), already observed in conducting polymer-based nanocomposites, was recently reported and evidenced at low frequencies (
doi_str_mv 10.3390/ma16144901
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In this contribution, we demonstrate that it is possible to produce economic high-density polyethylene (HDPE) nanocomposites exhibiting an NC effect at low frequencies via a convenient and environmentally friendly extrusion-like process by only adjusting the duration of melt-mixing. Nanocomposite materials are produced by confining a limited quantity, i.e., 4.6 wt.%, of multiwalled carbon nanotubes (CNTs) within semi-crystalline HDPE to reach the percolation threshold. With increasing melt processing time, crystallites of HDPE developing at the surface of CNTs become bigger and perturbate the connections between CNTs leading to a dramatic change in the electrical behavior of the systems. More specifically, the link between NC and current oscillations is stressed while the dependence of NC with the size of polymer crystallites is evidenced. 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subjects Capacitance
Carbon fibers
Communication
Conducting polymers
Crystallites
Electrostatic discharges
Graphene
High density polyethylenes
Humidity
Impact strength
Low frequencies
Multi wall carbon nanotubes
Nanocomposites
Nanoparticles
Percolation
Polyethylene
Polymers
Polyvinyl alcohol
Space charge
title Negative Capacitance in Nanocomposite Based on High-Density Polyethylene (HDPE) with Multiwalled Carbon Nanotubes (CNTs)
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