Improving dielectric properties and suppression of partial discharges in fiber/thermoset-matrix composites by polymeric nanofibers

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dc.contributor.authorPolanský, Radek
dc.contributor.authorProsr, Pavel
dc.contributor.authorPihera, Josef
dc.contributor.authorChvojka, Jiří
dc.contributor.authorKyselák, Tomáš
dc.date.accessioned2020-05-07T08:24:49Z
dc.date.available2020-05-07T08:24:49Z
dc.date.issued2019
dc.description.abstractThe polymeric nanofibrous layers as a new material for possible improving dielectric properties and suppression of partial discharges in fiber/thermoset-matrix composites are introduced in this paper. Electrospun nanofibers made from polybenzimidazole (PBI) and polyimide (PI) were incorporated into the structure of the commonly used fiber/thermoset-matrix composites to enhance their dielectric behavior. PBI and PI were electrospun using a Nanospider laboratory scale machine. The spinning process was set to produce nanofibrous layers with two different areal weights (1 and 3 g.m-2 for composites with PBI and 3 and 5 g.m-2 for composites with PI). Control composites without nanofibers as well as composites containing electrospun PBI and PI nanofibrous layers were manufactured by compression molding in a laboratory press without any previous vacuum debulking. To verify the positive or negative influence of the incorporated nanofibrous layers on the overall dielectric behavior of the composites, the volume resistivity p (Ωm) and dielectric strength Ed(kV.mm-1) were comprehensively measured. Initial results revealed that the volume resistivity of modified composites increased (of about 126 % for PBI and 217 % for PI) as well as the dielectric strength (of about 11 % for PBI and 53 % for PI). Obtained results were subsequently supported by partial discharge analysis which confirmed that the nanofibrous layers are capable to significantly suppress the partial discharge activity inside the composite structure.cs
dc.format.extent4 stranycs
dc.identifier.doi10.1109/EIC43217.2019.9046582
dc.identifier.orcid0000-0001-8137-7878 Chvojka, Jiří
dc.identifier.urihttps://dspace.tul.cz/handle/15240/154805
dc.identifier.urihttps://ieeexplore.ieee.org/document/9046582
dc.language.isocscs
dc.publisherInstitute of Electrical and Electronics Engineers Inc.
dc.relation.ispartof2019 IEEE Electrical Insulation Conference, EIC 2019 June 2019
dc.subjectdielectric propertiescs
dc.subjectelectro-spinningcs
dc.subjectelectrospun nanofiberscs
dc.subjectpolybenzimidazole (PBI)cs
dc.subjectpolyimide (PI)cs
dc.subjectpolymer-matrix compositescs
dc.titleImproving dielectric properties and suppression of partial discharges in fiber/thermoset-matrix composites by polymeric nanofiberscs
dc.typeConference Paper
local.article.number9046582
local.citation.epage8
local.citation.spage5
local.event.edate2019-06-19
local.event.locationCalgary; Canada
local.event.sdate2019-06-16
local.event.title2019 IEEE Electrical Insulation Conference, EIC 2019
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