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Charge transport in LDPE nanocomposites part I-experimental approach
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.ORCID iD: 0000-0003-4774-4341
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.ORCID iD: 0000-0003-2201-2806
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2016 (English)In: Polymers, ISSN 2073-4360, E-ISSN 2073-4360, Vol. 8, no 3, 1-19 p.Article in journal (Refereed) PublishedText
Abstract [en]

This work presents results of bulk conductivity and surface potential decay measurements on low-density polyethylene and its nanocomposites filled with uncoated MgO and Al2O3, with the aim to highlight the effect of the nanofillers on charge transport processes. Material samples at various filler contents, up to 9 wt %, were prepared in the form of thin films. The performed measurements show a significant impact of the nanofillers on reduction of material's direct current (dc) conductivity. The investigations thus focused on the nanocomposites having the lowest dc conductivity. Various mechanisms of charge generation and transport in solids, including space charge limited current, Poole-Frenkel effect and Schottky injection, were utilized for examining the experimental results. The mobilities of charge carriers were deduced from the measured surface potential decay characteristics and were found to be at least two times lower for the nanocomposites. The temperature dependencies of the mobilities were compared for different materials.

Place, publisher, year, edition, pages
MDPI AG , 2016. Vol. 8, no 3, 1-19 p.
Keyword [en]
Charge carrier mobility, Charge transport, dc conductivity, Low-density polyethylene, Nanocomposites, Trap depth
National Category
Polymer Technologies
Identifiers
URN: urn:nbn:se:kth:diva-187223DOI: 10.3390/polym8030087ISI: 000373711700034ScopusID: 2-s2.0-84963974333OAI: oai:DiVA.org:kth-187223DiVA: diva2:929225
Funder
Swedish Foundation for Strategic Research
Note

QC 20160518

Available from: 2016-05-18 Created: 2016-05-18 Last updated: 2016-05-18Bibliographically approved

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Pallon, LoveLiu, DongmingGedde, Ulf W.
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