Modification of chemically exfoliated graphene to produce efficient piezoresistive polystyrene–graphene composites

Farzad Nasirpouri, Hassan Pourmahmoudi, Farhang Abbasi, Samuel Littlejohn, Ashok Chauhan, Alain Nogaret

Research output: Contribution to journalArticle

9 Citations (Scopus)
126 Downloads (Pure)

Abstract

We report the chemical exfoliation of grapheneoxide from graphite and its subsequent reduction to graphene nanosheets (GN) to obtain highly conducting composites of graphene sheets in a polymer matrix. The effect of using graphite nanoparticles or flakes as precursors, and different drying methods, was investigated to obtain multilayer graphene sheets of atomically controlled thickness, which was essential to optimizing their dispersion in a polystyrene (PS) polymer matrix. In situ emulsion polymerization of the styrene monomer in the presence of GN was performed to obtain thin composite films with highly uniform dispersion and fewer graphene layers when GN were obtained from graphite flakes then freeze drying. The highest electrical conductivity of PS–GN composites was ~0.01 S/m for a graphene filling fraction of 2%. The piezoresistance of the PS–GN composites was evaluated and used in pressure sensor arrays with pressure field imaging capability.
Original languageEnglish
Pages (from-to)3512-3522
JournalJournal of Electronic Materials
Volume44
Issue number10
Early online date15 May 2015
DOIs
Publication statusPublished - Oct 2015

Fingerprint

Graphite
Polystyrenes
Graphene
polystyrene
graphene
Nanosheets
composite materials
Composite materials
graphite
flakes
Polymer matrix
Drying
freeze drying
Emulsion polymerization
polymers
Sensor arrays
Pressure sensors
Composite films
pressure sensors
matrices

Cite this

Modification of chemically exfoliated graphene to produce efficient piezoresistive polystyrene–graphene composites. / Nasirpouri, Farzad; Pourmahmoudi, Hassan; Abbasi, Farhang; Littlejohn, Samuel; Chauhan, Ashok; Nogaret, Alain.

In: Journal of Electronic Materials, Vol. 44, No. 10, 10.2015, p. 3512-3522.

Research output: Contribution to journalArticle

Nasirpouri, Farzad ; Pourmahmoudi, Hassan ; Abbasi, Farhang ; Littlejohn, Samuel ; Chauhan, Ashok ; Nogaret, Alain. / Modification of chemically exfoliated graphene to produce efficient piezoresistive polystyrene–graphene composites. In: Journal of Electronic Materials. 2015 ; Vol. 44, No. 10. pp. 3512-3522.
@article{5ec17b4f9b534708be7842130d70a116,
title = "Modification of chemically exfoliated graphene to produce efficient piezoresistive polystyrene–graphene composites",
abstract = "We report the chemical exfoliation of grapheneoxide from graphite and its subsequent reduction to graphene nanosheets (GN) to obtain highly conducting composites of graphene sheets in a polymer matrix. The effect of using graphite nanoparticles or flakes as precursors, and different drying methods, was investigated to obtain multilayer graphene sheets of atomically controlled thickness, which was essential to optimizing their dispersion in a polystyrene (PS) polymer matrix. In situ emulsion polymerization of the styrene monomer in the presence of GN was performed to obtain thin composite films with highly uniform dispersion and fewer graphene layers when GN were obtained from graphite flakes then freeze drying. The highest electrical conductivity of PS–GN composites was ~0.01 S/m for a graphene filling fraction of 2{\%}. The piezoresistance of the PS–GN composites was evaluated and used in pressure sensor arrays with pressure field imaging capability.",
author = "Farzad Nasirpouri and Hassan Pourmahmoudi and Farhang Abbasi and Samuel Littlejohn and Ashok Chauhan and Alain Nogaret",
year = "2015",
month = "10",
doi = "10.1007/s11664-015-3799-0",
language = "English",
volume = "44",
pages = "3512--3522",
journal = "Journal of Electronic Materials",
issn = "0361-5235",
publisher = "Springer New York",
number = "10",

}

TY - JOUR

T1 - Modification of chemically exfoliated graphene to produce efficient piezoresistive polystyrene–graphene composites

AU - Nasirpouri, Farzad

AU - Pourmahmoudi, Hassan

AU - Abbasi, Farhang

AU - Littlejohn, Samuel

AU - Chauhan, Ashok

AU - Nogaret, Alain

PY - 2015/10

Y1 - 2015/10

N2 - We report the chemical exfoliation of grapheneoxide from graphite and its subsequent reduction to graphene nanosheets (GN) to obtain highly conducting composites of graphene sheets in a polymer matrix. The effect of using graphite nanoparticles or flakes as precursors, and different drying methods, was investigated to obtain multilayer graphene sheets of atomically controlled thickness, which was essential to optimizing their dispersion in a polystyrene (PS) polymer matrix. In situ emulsion polymerization of the styrene monomer in the presence of GN was performed to obtain thin composite films with highly uniform dispersion and fewer graphene layers when GN were obtained from graphite flakes then freeze drying. The highest electrical conductivity of PS–GN composites was ~0.01 S/m for a graphene filling fraction of 2%. The piezoresistance of the PS–GN composites was evaluated and used in pressure sensor arrays with pressure field imaging capability.

AB - We report the chemical exfoliation of grapheneoxide from graphite and its subsequent reduction to graphene nanosheets (GN) to obtain highly conducting composites of graphene sheets in a polymer matrix. The effect of using graphite nanoparticles or flakes as precursors, and different drying methods, was investigated to obtain multilayer graphene sheets of atomically controlled thickness, which was essential to optimizing their dispersion in a polystyrene (PS) polymer matrix. In situ emulsion polymerization of the styrene monomer in the presence of GN was performed to obtain thin composite films with highly uniform dispersion and fewer graphene layers when GN were obtained from graphite flakes then freeze drying. The highest electrical conductivity of PS–GN composites was ~0.01 S/m for a graphene filling fraction of 2%. The piezoresistance of the PS–GN composites was evaluated and used in pressure sensor arrays with pressure field imaging capability.

UR - http://dx.doi.org/10.1007/s11664-015-3799-0

U2 - 10.1007/s11664-015-3799-0

DO - 10.1007/s11664-015-3799-0

M3 - Article

VL - 44

SP - 3512

EP - 3522

JO - Journal of Electronic Materials

JF - Journal of Electronic Materials

SN - 0361-5235

IS - 10

ER -