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 | |
| Publication status | Published - 2015 Dec 1 |
| Externally published | Yes |
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Keywords
- Conductivity
- Electromagnetic interference shielding
- Graphene
- Permittivity
- Sulfur doping
ASJC Scopus subject areas
- Ceramics and Composites
- Civil and Structural Engineering
Cite this
Sulfur doped graphene/polystyrene nanocomposites for electromagnetic interference shielding. / Shahzad, Faisal; Yu, Seunggun; Kumar, Pradip; Lee, Jang Woo; Kim, Yoon Hyun; Hong, Soon Man; Koo, Chong Min.
In: Composite Structures, Vol. 133, 01.12.2015, p. 1267-1275.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Sulfur doped graphene/polystyrene nanocomposites for electromagnetic interference shielding
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
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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UR - http://www.scopus.com/inward/citedby.url?scp=84940108687&partnerID=8YFLogxK
U2 - 10.1016/j.compstruct.2015.07.036
DO - 10.1016/j.compstruct.2015.07.036
M3 - Article
VL - 133
SP - 1267
EP - 1275
JO - Composite Structures
JF - Composite Structures
SN - 0263-8223
ER -