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 (<10 kHz) in non-conducting polymer-based nanocomposites containing conductive particles. In this contribution, we demonstrate that it is possible to prod...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-07-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/16/14/4901 |
| _version_ | 1797588513392164864 |
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| author | Raymonde Mouecoucou Leïla Bonnaud Philippe Dubois |
| author_facet | Raymonde Mouecoucou Leïla Bonnaud Philippe Dubois |
| author_sort | Raymonde Mouecoucou |
| collection | DOAJ |
| description | Negative capacitance (NC), already observed in conducting polymer-based nanocomposites, was recently reported and evidenced at low frequencies (<10 kHz) in non-conducting polymer-based nanocomposites containing conductive particles. 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. NC tends to appear when space charge effects take place in HDPE/MWCNT interfaces, in structures with convenient crystallite sizes corresponding to 10 min of melt-mixing. |
| first_indexed | 2024-03-11T00:53:07Z |
| format | Article |
| id | doaj.art-b8abed1b0ba84da4b8c55e3eba406a11 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T00:53:07Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-b8abed1b0ba84da4b8c55e3eba406a112023-11-18T20:14:46ZengMDPI AGMaterials1996-19442023-07-011614490110.3390/ma16144901Negative Capacitance in Nanocomposite Based on High-Density Polyethylene (HDPE) with Multiwalled Carbon Nanotubes (CNTs)Raymonde Mouecoucou0Leïla Bonnaud1Philippe Dubois2Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), Université de Lorraine, 2 Rue Edouard Belin, 57070 Metz, FranceLaboratory of Polymeric and Composite Materials (LPCM), Center of Innovation and Research in Materials, Materia Nova Research Center & University of Mons (UMONS), Place du Parc 20, 7000 Mons, BelgiumLaboratory of Polymeric and Composite Materials (LPCM), Center of Innovation and Research in Materials, Materia Nova Research Center & University of Mons (UMONS), Place du Parc 20, 7000 Mons, BelgiumNegative capacitance (NC), already observed in conducting polymer-based nanocomposites, was recently reported and evidenced at low frequencies (<10 kHz) in non-conducting polymer-based nanocomposites containing conductive particles. 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. NC tends to appear when space charge effects take place in HDPE/MWCNT interfaces, in structures with convenient crystallite sizes corresponding to 10 min of melt-mixing.https://www.mdpi.com/1996-1944/16/14/4901negative capacitancedielectric organic materialnanocompositespolyethylenecarbon nanotubes |
| spellingShingle | Raymonde Mouecoucou Leïla Bonnaud Philippe Dubois Negative Capacitance in Nanocomposite Based on High-Density Polyethylene (HDPE) with Multiwalled Carbon Nanotubes (CNTs) Materials negative capacitance dielectric organic material nanocomposites polyethylene carbon nanotubes |
| title | Negative Capacitance in Nanocomposite Based on High-Density Polyethylene (HDPE) with Multiwalled Carbon Nanotubes (CNTs) |
| title_full | Negative Capacitance in Nanocomposite Based on High-Density Polyethylene (HDPE) with Multiwalled Carbon Nanotubes (CNTs) |
| title_fullStr | Negative Capacitance in Nanocomposite Based on High-Density Polyethylene (HDPE) with Multiwalled Carbon Nanotubes (CNTs) |
| title_full_unstemmed | Negative Capacitance in Nanocomposite Based on High-Density Polyethylene (HDPE) with Multiwalled Carbon Nanotubes (CNTs) |
| title_short | Negative Capacitance in Nanocomposite Based on High-Density Polyethylene (HDPE) with Multiwalled Carbon Nanotubes (CNTs) |
| title_sort | negative capacitance in nanocomposite based on high density polyethylene hdpe with multiwalled carbon nanotubes cnts |
| topic | negative capacitance dielectric organic material nanocomposites polyethylene carbon nanotubes |
| url | https://www.mdpi.com/1996-1944/16/14/4901 |
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