Anisotropic networking of carbon black in glass/epoxy composites using electric field

Sila Gungor, Charles E. Bakis

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

This investigation explores the manipulation of carbon black particles for tailoring the electrical properties of unidirectional glass fiber reinforced epoxy composites. Carbon black particles were anisotropically networked along the through-thickness direction of glass/epoxy composite plates using an alternating current electric field applied during curing of the composite, with the objective of maximizing the electrical conductivity through the thickness. Anisotropic networking was observed microscopically and was quantified by measuring the DC electrical conductivity of the cured glass/epoxy composite material in the three principal directions. The effects of carbon black amount, electric field strength, and electric field frequency on the anisotropic conductivity are elucidated using a parametric investigation. It is shown that the through-thickness conductivity can be increased by a factor of roughly 104 relative to the case with no conductivity tailoring and can be of the same order of magnitude as the transverse and longitudinal in-plane conductivities, which are improvements well beyond the studies published until now. Moreover, for the first time, it is shown that the through-thickness conductivity of unidirectional glass/epoxy composites containing carbon black can exceed the in-plane transverse conductivity by selecting appropriate electric field parameters during processing.

Original languageEnglish (US)
Pages (from-to)535-544
Number of pages10
JournalJournal of Composite Materials
Volume49
Issue number5
DOIs
StatePublished - Mar 17 2015

Fingerprint

Soot
Carbon black
Electric fields
Glass
Composite materials
Glass fibers
Curing
Electric properties
Processing

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

@article{63658d13143c4be09da40552c4cac404,
title = "Anisotropic networking of carbon black in glass/epoxy composites using electric field",
abstract = "This investigation explores the manipulation of carbon black particles for tailoring the electrical properties of unidirectional glass fiber reinforced epoxy composites. Carbon black particles were anisotropically networked along the through-thickness direction of glass/epoxy composite plates using an alternating current electric field applied during curing of the composite, with the objective of maximizing the electrical conductivity through the thickness. Anisotropic networking was observed microscopically and was quantified by measuring the DC electrical conductivity of the cured glass/epoxy composite material in the three principal directions. The effects of carbon black amount, electric field strength, and electric field frequency on the anisotropic conductivity are elucidated using a parametric investigation. It is shown that the through-thickness conductivity can be increased by a factor of roughly 104 relative to the case with no conductivity tailoring and can be of the same order of magnitude as the transverse and longitudinal in-plane conductivities, which are improvements well beyond the studies published until now. Moreover, for the first time, it is shown that the through-thickness conductivity of unidirectional glass/epoxy composites containing carbon black can exceed the in-plane transverse conductivity by selecting appropriate electric field parameters during processing.",
author = "Sila Gungor and Bakis, {Charles E.}",
year = "2015",
month = "3",
day = "17",
doi = "10.1177/0021998314521256",
language = "English (US)",
volume = "49",
pages = "535--544",
journal = "Journal of Composite Materials",
issn = "0021-9983",
publisher = "SAGE Publications Ltd",
number = "5",

}

Anisotropic networking of carbon black in glass/epoxy composites using electric field. / Gungor, Sila; Bakis, Charles E.

In: Journal of Composite Materials, Vol. 49, No. 5, 17.03.2015, p. 535-544.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Anisotropic networking of carbon black in glass/epoxy composites using electric field

AU - Gungor, Sila

AU - Bakis, Charles E.

PY - 2015/3/17

Y1 - 2015/3/17

N2 - This investigation explores the manipulation of carbon black particles for tailoring the electrical properties of unidirectional glass fiber reinforced epoxy composites. Carbon black particles were anisotropically networked along the through-thickness direction of glass/epoxy composite plates using an alternating current electric field applied during curing of the composite, with the objective of maximizing the electrical conductivity through the thickness. Anisotropic networking was observed microscopically and was quantified by measuring the DC electrical conductivity of the cured glass/epoxy composite material in the three principal directions. The effects of carbon black amount, electric field strength, and electric field frequency on the anisotropic conductivity are elucidated using a parametric investigation. It is shown that the through-thickness conductivity can be increased by a factor of roughly 104 relative to the case with no conductivity tailoring and can be of the same order of magnitude as the transverse and longitudinal in-plane conductivities, which are improvements well beyond the studies published until now. Moreover, for the first time, it is shown that the through-thickness conductivity of unidirectional glass/epoxy composites containing carbon black can exceed the in-plane transverse conductivity by selecting appropriate electric field parameters during processing.

AB - This investigation explores the manipulation of carbon black particles for tailoring the electrical properties of unidirectional glass fiber reinforced epoxy composites. Carbon black particles were anisotropically networked along the through-thickness direction of glass/epoxy composite plates using an alternating current electric field applied during curing of the composite, with the objective of maximizing the electrical conductivity through the thickness. Anisotropic networking was observed microscopically and was quantified by measuring the DC electrical conductivity of the cured glass/epoxy composite material in the three principal directions. The effects of carbon black amount, electric field strength, and electric field frequency on the anisotropic conductivity are elucidated using a parametric investigation. It is shown that the through-thickness conductivity can be increased by a factor of roughly 104 relative to the case with no conductivity tailoring and can be of the same order of magnitude as the transverse and longitudinal in-plane conductivities, which are improvements well beyond the studies published until now. Moreover, for the first time, it is shown that the through-thickness conductivity of unidirectional glass/epoxy composites containing carbon black can exceed the in-plane transverse conductivity by selecting appropriate electric field parameters during processing.

UR - http://www.scopus.com/inward/record.url?scp=84923102153&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84923102153&partnerID=8YFLogxK

U2 - 10.1177/0021998314521256

DO - 10.1177/0021998314521256

M3 - Article

AN - SCOPUS:84923102153

VL - 49

SP - 535

EP - 544

JO - Journal of Composite Materials

JF - Journal of Composite Materials

SN - 0021-9983

IS - 5

ER -