Sulfur doped graphene/polystyrene nanocomposites for electromagnetic interference shielding

Faisal Shahzad; Seunggun Yu; Pradip Kumar; Jang Woo Lee; Yoon Hyun Kim; Soon Man Hong; Chong Min Koo

doi:10.1016/j.compstruct.2015.07.036

Sulfur doped graphene/polystyrene nanocomposites for electromagnetic interference shielding

Faisal Shahzad, Seunggun Yu, Pradip Kumar, Jang Woo Lee, Yoon Hyun Kim, Soon Man Hong, Chong Min Koo

Research output: Contribution to journal › Article › peer-review

77 Citations (Scopus)

Abstract

In this paper, for the first time, we present a simple and straightforward method to improve not only electrical conductivity and complex permittivity but also electromagnetic interference (EMI) shielding effectiveness of reduced graphene oxide (rGO)/polystyrene (PS) nanocomposites through sulfur doping. Sulfur-doped reduced graphene oxide with thiophene-like structure (2.6at.% S), synthesized through a simple heating process of a mixture of graphene oxide and sulfur powder, revealed almost three times larger electrical conductivity (1095Sm^-1) than undoped rGO (395Sm^-1). The SrGO/PS nanocomposite showed not only 150% larger electrical conductivity and 50% larger complex permittivity, but also improved EMI shielding effectiveness (24.5dB) at a frequency of 18GHz than rGO/PS nanocomposite (21.4dB) at the same loading level of 7.5vol.%. Considering the simplicity and effectiveness of process, sulfur doping of graphene is expected to be used as a versatile method to improve EMI shielding efficiency of graphene/polymer nanocomposites.

Original language	English
Pages (from-to)	1267-1275
Number of pages	9
Journal	Composite Structures
Volume	133
DOIs	https://doi.org/10.1016/j.compstruct.2015.07.036
Publication status	Published - 2015 Dec 1
Externally published	Yes

Keywords

Conductivity
Electromagnetic interference shielding
Graphene
Permittivity
Sulfur doping

ASJC Scopus subject areas

Ceramics and Composites
Civil and Structural Engineering

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10.1016/j.compstruct.2015.07.036

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title = "Sulfur doped graphene/polystyrene nanocomposites for electromagnetic interference shielding",

abstract = "In this paper, for the first time, we present a simple and straightforward method to improve not only electrical conductivity and complex permittivity but also electromagnetic interference (EMI) shielding effectiveness of reduced graphene oxide (rGO)/polystyrene (PS) nanocomposites through sulfur doping. Sulfur-doped reduced graphene oxide with thiophene-like structure (2.6at.% S), synthesized through a simple heating process of a mixture of graphene oxide and sulfur powder, revealed almost three times larger electrical conductivity (1095Sm-1) than undoped rGO (395Sm-1). The SrGO/PS nanocomposite showed not only 150% larger electrical conductivity and 50% larger complex permittivity, but also improved EMI shielding effectiveness (24.5dB) at a frequency of 18GHz than rGO/PS nanocomposite (21.4dB) at the same loading level of 7.5vol.%. Considering the simplicity and effectiveness of process, sulfur doping of graphene is expected to be used as a versatile method to improve EMI shielding efficiency of graphene/polymer nanocomposites.",

keywords = "Conductivity, Electromagnetic interference shielding, Graphene, Permittivity, Sulfur doping",

author = "Faisal Shahzad and Seunggun Yu and Pradip Kumar and Lee, {Jang Woo} and Kim, {Yoon Hyun} and Hong, {Soon Man} and Koo, {Chong Min}",

note = "Funding Information: This work was supported by Graphene Part & Material Development Program, the Fundamental R&D Program for Core Technology of Materials and the Industrial Strategic Technology Development Program funded by the Ministry of Trade, Industry and Energy, Republic of Korea and partially by Korea Institute of Science and Technology. Appendix A Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd.",

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doi = "10.1016/j.compstruct.2015.07.036",

language = "English",

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AU - Shahzad, Faisal

AU - Yu, Seunggun

AU - Kumar, Pradip

AU - Lee, Jang Woo

AU - Kim, Yoon Hyun

AU - Hong, Soon Man

AU - Koo, Chong Min

N1 - Funding Information: This work was supported by Graphene Part & Material Development Program, the Fundamental R&D Program for Core Technology of Materials and the Industrial Strategic Technology Development Program funded by the Ministry of Trade, Industry and Energy, Republic of Korea and partially by Korea Institute of Science and Technology. Appendix A Publisher Copyright: © 2015 Elsevier Ltd.

PY - 2015/12/1

Y1 - 2015/12/1

N2 - In this paper, for the first time, we present a simple and straightforward method to improve not only electrical conductivity and complex permittivity but also electromagnetic interference (EMI) shielding effectiveness of reduced graphene oxide (rGO)/polystyrene (PS) nanocomposites through sulfur doping. Sulfur-doped reduced graphene oxide with thiophene-like structure (2.6at.% S), synthesized through a simple heating process of a mixture of graphene oxide and sulfur powder, revealed almost three times larger electrical conductivity (1095Sm-1) than undoped rGO (395Sm-1). The SrGO/PS nanocomposite showed not only 150% larger electrical conductivity and 50% larger complex permittivity, but also improved EMI shielding effectiveness (24.5dB) at a frequency of 18GHz than rGO/PS nanocomposite (21.4dB) at the same loading level of 7.5vol.%. Considering the simplicity and effectiveness of process, sulfur doping of graphene is expected to be used as a versatile method to improve EMI shielding efficiency of graphene/polymer nanocomposites.

AB - In this paper, for the first time, we present a simple and straightforward method to improve not only electrical conductivity and complex permittivity but also electromagnetic interference (EMI) shielding effectiveness of reduced graphene oxide (rGO)/polystyrene (PS) nanocomposites through sulfur doping. Sulfur-doped reduced graphene oxide with thiophene-like structure (2.6at.% S), synthesized through a simple heating process of a mixture of graphene oxide and sulfur powder, revealed almost three times larger electrical conductivity (1095Sm-1) than undoped rGO (395Sm-1). The SrGO/PS nanocomposite showed not only 150% larger electrical conductivity and 50% larger complex permittivity, but also improved EMI shielding effectiveness (24.5dB) at a frequency of 18GHz than rGO/PS nanocomposite (21.4dB) at the same loading level of 7.5vol.%. Considering the simplicity and effectiveness of process, sulfur doping of graphene is expected to be used as a versatile method to improve EMI shielding efficiency of graphene/polymer nanocomposites.

KW - Conductivity

KW - Electromagnetic interference shielding

KW - Graphene

KW - Permittivity

KW - Sulfur doping

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Sulfur doped graphene/polystyrene nanocomposites for electromagnetic interference shielding

Abstract

Keywords

ASJC Scopus subject areas

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