Surface functionalization and humidity on charge transport in PP/TiO2 and PP/MgO nanocomposites
Surface functionalization and humidity on charge transport in PP/TiO2 and PP/MgO nanocomposites
This study investigates the influence of polar silane coupling agents on charge transport in polypropylene (PP) nanocomposites containing magnesium oxide (MgO) and titanium dioxide (TiO2) nanoparticles in the presence of water molecules. Surface functionalization results in reduced charge accumulation and electrical conductivity compared to unmodified nanocomposites. Under vacuum-dried conditions, the charge transport is primarily dominated by the types of nanoparticles. It is hypothesized that band bending at the interfaces of MgO used in the PP matrix is more effective in suppressing charges than TiO2. Regarding humidity, the extent of water absorption not only influences charge transport but also contributes to the bonding states between water molecules and nanoparticle surfaces. Despite higher water absorption, band bending at the interfaces in PP/MgO potentially limits the increase in charge transport. Additionally, differences in electronegativity during surface functionalization would lead to distinct bonding states with water molecules, resulting in varying energy band levels at interfaces, which in turn influence the ability of materials to capture charge carriers. The most effective charge suppression and reduced electrical conductivity are achieved in ethoxy-modified materials with amino functional groups.
Dielectrics, Dielectrics and electrical insulation, Nanocomposites, Nanoparticles, Plastics, Scanning electron microscopy, Temperature measurement, band bending, charge transport, electronegativity, humidity, magnesium oxide, polypropylene, surface functionalization, titanium dioxide
1
Ketsamee, Phichet
320757bd-99cd-43d2-a8e8-b8100f15f461
Andritsch, Thomas
8681e640-e584-424e-a1f1-0d8b713de01c
Vaughan, Alun
6d813b66-17f9-4864-9763-25a6d659d8a3
Ketsamee, Phichet
320757bd-99cd-43d2-a8e8-b8100f15f461
Andritsch, Thomas
8681e640-e584-424e-a1f1-0d8b713de01c
Vaughan, Alun
6d813b66-17f9-4864-9763-25a6d659d8a3
Ketsamee, Phichet, Andritsch, Thomas and Vaughan, Alun
(2024)
Surface functionalization and humidity on charge transport in PP/TiO2 and PP/MgO nanocomposites.
IEEE Transactions on Dielectrics and Electrical Insulation, .
(doi:10.1109/TDEI.2024.3359123).
(In Press)
Abstract
This study investigates the influence of polar silane coupling agents on charge transport in polypropylene (PP) nanocomposites containing magnesium oxide (MgO) and titanium dioxide (TiO2) nanoparticles in the presence of water molecules. Surface functionalization results in reduced charge accumulation and electrical conductivity compared to unmodified nanocomposites. Under vacuum-dried conditions, the charge transport is primarily dominated by the types of nanoparticles. It is hypothesized that band bending at the interfaces of MgO used in the PP matrix is more effective in suppressing charges than TiO2. Regarding humidity, the extent of water absorption not only influences charge transport but also contributes to the bonding states between water molecules and nanoparticle surfaces. Despite higher water absorption, band bending at the interfaces in PP/MgO potentially limits the increase in charge transport. Additionally, differences in electronegativity during surface functionalization would lead to distinct bonding states with water molecules, resulting in varying energy band levels at interfaces, which in turn influence the ability of materials to capture charge carriers. The most effective charge suppression and reduced electrical conductivity are achieved in ethoxy-modified materials with amino functional groups.
Text
TDEI-0593-2023.R1
- Accepted Manuscript
More information
Accepted/In Press date: 23 January 2024
Additional Information:
Publisher Copyright:
IEEE
Keywords:
Dielectrics, Dielectrics and electrical insulation, Nanocomposites, Nanoparticles, Plastics, Scanning electron microscopy, Temperature measurement, band bending, charge transport, electronegativity, humidity, magnesium oxide, polypropylene, surface functionalization, titanium dioxide
Identifiers
Local EPrints ID: 486523
URI: http://eprints.soton.ac.uk/id/eprint/486523
ISSN: 1070-9878
PURE UUID: 87201952-3a3d-4d83-925f-91e7825866c3
Catalogue record
Date deposited: 25 Jan 2024 17:31
Last modified: 12 Apr 2024 01:58
Export record
Altmetrics
Contributors
Author:
Phichet Ketsamee
Author:
Thomas Andritsch
Author:
Alun Vaughan
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics