Abstract
Carbon nanofiber (CNF) reinforced epoxy matrix nanocomposites and CNF reinforced glass hollow particle filled syntactic foams are studied for electrical properties. The effect of CNF weight fraction, hollow particle volume fraction, and hollow particle wall thickness on impedance and dielectric constant are characterized. The results show that the impedance decreases and the dielectric constant increases with increasing CNF content in the composites. Nanocomposites containing 10 wt.% CNFs showed significantly higher dielectric constant because of the presence of a continuous network of CNFs in the composite. CNF reinforced syntactic foams showed higher dielectric constant than the neat resin. The CNF content had a more prominent effect on the dielectric constant than the glass hollow particle volume fraction and wall thickness. The Maxwell-Garnett and the Jayasundere-Smith models are modified to include the effect of hollow particle wall thickness and obtain predictions of dielectric constants of syntactic foams. The semi-empirical predictions obtained from Maxwell-Garnett models are closer to the experimental values.Lightweight syntactic foams, tailored for electrical properties, can be useful in electronic packaging applications.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 416-422 |
| Number of pages | 7 |
| Journal | Materials and Design |
| Volume | 56 |
| DOIs | |
| State | Published - 2014 |
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Keywords
- Carbon nanofiber
- Composite material
- Dielectric constant
- Permittivity
- Syntactic foam
ASJC Scopus subject areas
- Mechanical Engineering
- Mechanics of Materials
- Materials Science(all)
Cite this
Electrical properties of carbon nanofiber reinforced multiscale polymer composites. / Poveda, Ronald L.; Gupta, Nikhil.
In: Materials and Design, Vol. 56, 2014, p. 416-422.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electrical properties of carbon nanofiber reinforced multiscale polymer composites
AU - Poveda, Ronald L.
AU - Gupta, Nikhil
PY - 2014
Y1 - 2014
N2 - Carbon nanofiber (CNF) reinforced epoxy matrix nanocomposites and CNF reinforced glass hollow particle filled syntactic foams are studied for electrical properties. The effect of CNF weight fraction, hollow particle volume fraction, and hollow particle wall thickness on impedance and dielectric constant are characterized. The results show that the impedance decreases and the dielectric constant increases with increasing CNF content in the composites. Nanocomposites containing 10 wt.% CNFs showed significantly higher dielectric constant because of the presence of a continuous network of CNFs in the composite. CNF reinforced syntactic foams showed higher dielectric constant than the neat resin. The CNF content had a more prominent effect on the dielectric constant than the glass hollow particle volume fraction and wall thickness. The Maxwell-Garnett and the Jayasundere-Smith models are modified to include the effect of hollow particle wall thickness and obtain predictions of dielectric constants of syntactic foams. The semi-empirical predictions obtained from Maxwell-Garnett models are closer to the experimental values.Lightweight syntactic foams, tailored for electrical properties, can be useful in electronic packaging applications.
AB - Carbon nanofiber (CNF) reinforced epoxy matrix nanocomposites and CNF reinforced glass hollow particle filled syntactic foams are studied for electrical properties. The effect of CNF weight fraction, hollow particle volume fraction, and hollow particle wall thickness on impedance and dielectric constant are characterized. The results show that the impedance decreases and the dielectric constant increases with increasing CNF content in the composites. Nanocomposites containing 10 wt.% CNFs showed significantly higher dielectric constant because of the presence of a continuous network of CNFs in the composite. CNF reinforced syntactic foams showed higher dielectric constant than the neat resin. The CNF content had a more prominent effect on the dielectric constant than the glass hollow particle volume fraction and wall thickness. The Maxwell-Garnett and the Jayasundere-Smith models are modified to include the effect of hollow particle wall thickness and obtain predictions of dielectric constants of syntactic foams. The semi-empirical predictions obtained from Maxwell-Garnett models are closer to the experimental values.Lightweight syntactic foams, tailored for electrical properties, can be useful in electronic packaging applications.
KW - Carbon nanofiber
KW - Composite material
KW - Dielectric constant
KW - Permittivity
KW - Syntactic foam
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UR - http://www.scopus.com/inward/citedby.url?scp=84890087686&partnerID=8YFLogxK
U2 - 10.1016/j.matdes.2013.11.074
DO - 10.1016/j.matdes.2013.11.074
M3 - Article
AN - SCOPUS:84890087686
VL - 56
SP - 416
EP - 422
JO - Materials and Design
JF - Materials and Design
SN - 0264-1275
ER -