Graphene foam/carbon nanotube/poly(dimethyl siloxane) composites for exceptional microwave shielding

Xinying Sun; Xu Liu; Xi Shen; Ying Wu; Zhenyu Wang; Jang Kyo Kim

doi:10.1016/j.compositesa.2016.03.009

Graphene foam/carbon nanotube/poly(dimethyl siloxane) composites for exceptional microwave shielding

Xinying Sun, Xu Liu, Xi Shen, Ying Wu, Zhenyu Wang, Jang Kyo Kim

Mechanical & Nuclear Engineering

The Hong Kong University of Science and Technology

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

189 Scopus citations

Abstract

Highly porous poly(dimethyl siloxane) (PDMS) composites containing cellular-structured microscale graphene foams (GFs) and conductive nanoscale carbon nanotubes (CNTs) are fabricated. The unique three-dimensional, multi-scale hybrid composites with inherent percolation and a high porosity of 90.8% present a remarkable electromagnetic interference shielding effectiveness (EMI SE) of ∼75 dB, a 200% enhancement against 25 dB of the composites made from GFs alone with the same graphene content and porosity. The corresponding specific EMI SE measured against the composite density is 833 dB cm³/g. These values are among the highest for all carbon filler/polymer composites reported thus far. Significant synergy arises from the hybrid reinforcement structure of the composites: the GFs drive the incident microwaves to be attenuated by dissipation of the currents induced by electromagnetic fields, while the CNTs greatly enhance the dissipation of surface currents by expanding the conductive networks and introducing numerous interfaces with the matrix.

Original language	British English
Pages (from-to)	199-206
Number of pages	8
Journal	Composites Part A: Applied Science and Manufacturing
Volume	85
DOIs	https://doi.org/10.1016/j.compositesa.2016.03.009
State	Published - Jun 2016

Keywords

EMI shielding
GF/CNT/PDMS composites
Graphene foam

Access to Document

10.1016/j.compositesa.2016.03.009

Cite this

@article{92cfc74ab74443aab08f38b580c1ebaa,

title = "Graphene foam/carbon nanotube/poly(dimethyl siloxane) composites for exceptional microwave shielding",

abstract = "Highly porous poly(dimethyl siloxane) (PDMS) composites containing cellular-structured microscale graphene foams (GFs) and conductive nanoscale carbon nanotubes (CNTs) are fabricated. The unique three-dimensional, multi-scale hybrid composites with inherent percolation and a high porosity of 90.8% present a remarkable electromagnetic interference shielding effectiveness (EMI SE) of ∼75 dB, a 200% enhancement against 25 dB of the composites made from GFs alone with the same graphene content and porosity. The corresponding specific EMI SE measured against the composite density is 833 dB cm3/g. These values are among the highest for all carbon filler/polymer composites reported thus far. Significant synergy arises from the hybrid reinforcement structure of the composites: the GFs drive the incident microwaves to be attenuated by dissipation of the currents induced by electromagnetic fields, while the CNTs greatly enhance the dissipation of surface currents by expanding the conductive networks and introducing numerous interfaces with the matrix.",

keywords = "EMI shielding, GF/CNT/PDMS composites, Graphene foam",

author = "Xinying Sun and Xu Liu and Xi Shen and Ying Wu and Zhenyu Wang and Kim, {Jang Kyo}",

note = "Funding Information: This project was financially supported by the Research Grants Council (GRF Projects 613612 and 16203415). The authors are grateful to Prof. K.M. Luk at City University of Hong Kong for assisting with the measurements of EMI SEs. Technical assistance from the Advanced Engineering Materials Facilities (AEMF) and Materials Characterization and Preparation Facilities (MCPF) of HKUST is appreciated. Publisher Copyright: {\textcopyright} 2016 Elsevier Ltd. All rights reserved.",

year = "2016",

month = jun,

doi = "10.1016/j.compositesa.2016.03.009",

language = "British English",

volume = "85",

pages = "199--206",

journal = "Composites Part A: Applied Science and Manufacturing",

issn = "1359-835X",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Graphene foam/carbon nanotube/poly(dimethyl siloxane) composites for exceptional microwave shielding

AU - Sun, Xinying

AU - Liu, Xu

AU - Shen, Xi

AU - Wu, Ying

AU - Wang, Zhenyu

AU - Kim, Jang Kyo

N1 - Funding Information: This project was financially supported by the Research Grants Council (GRF Projects 613612 and 16203415). The authors are grateful to Prof. K.M. Luk at City University of Hong Kong for assisting with the measurements of EMI SEs. Technical assistance from the Advanced Engineering Materials Facilities (AEMF) and Materials Characterization and Preparation Facilities (MCPF) of HKUST is appreciated. Publisher Copyright: © 2016 Elsevier Ltd. All rights reserved.

PY - 2016/6

Y1 - 2016/6

N2 - Highly porous poly(dimethyl siloxane) (PDMS) composites containing cellular-structured microscale graphene foams (GFs) and conductive nanoscale carbon nanotubes (CNTs) are fabricated. The unique three-dimensional, multi-scale hybrid composites with inherent percolation and a high porosity of 90.8% present a remarkable electromagnetic interference shielding effectiveness (EMI SE) of ∼75 dB, a 200% enhancement against 25 dB of the composites made from GFs alone with the same graphene content and porosity. The corresponding specific EMI SE measured against the composite density is 833 dB cm3/g. These values are among the highest for all carbon filler/polymer composites reported thus far. Significant synergy arises from the hybrid reinforcement structure of the composites: the GFs drive the incident microwaves to be attenuated by dissipation of the currents induced by electromagnetic fields, while the CNTs greatly enhance the dissipation of surface currents by expanding the conductive networks and introducing numerous interfaces with the matrix.

AB - Highly porous poly(dimethyl siloxane) (PDMS) composites containing cellular-structured microscale graphene foams (GFs) and conductive nanoscale carbon nanotubes (CNTs) are fabricated. The unique three-dimensional, multi-scale hybrid composites with inherent percolation and a high porosity of 90.8% present a remarkable electromagnetic interference shielding effectiveness (EMI SE) of ∼75 dB, a 200% enhancement against 25 dB of the composites made from GFs alone with the same graphene content and porosity. The corresponding specific EMI SE measured against the composite density is 833 dB cm3/g. These values are among the highest for all carbon filler/polymer composites reported thus far. Significant synergy arises from the hybrid reinforcement structure of the composites: the GFs drive the incident microwaves to be attenuated by dissipation of the currents induced by electromagnetic fields, while the CNTs greatly enhance the dissipation of surface currents by expanding the conductive networks and introducing numerous interfaces with the matrix.

KW - EMI shielding

KW - GF/CNT/PDMS composites

KW - Graphene foam

UR - http://www.scopus.com/inward/record.url?scp=84978323340&partnerID=8YFLogxK

U2 - 10.1016/j.compositesa.2016.03.009

DO - 10.1016/j.compositesa.2016.03.009

M3 - Article

AN - SCOPUS:84978323340

SN - 1359-835X

VL - 85

SP - 199

EP - 206

JO - Composites Part A: Applied Science and Manufacturing

JF - Composites Part A: Applied Science and Manufacturing

ER -

Graphene foam/carbon nanotube/poly(dimethyl siloxane) composites for exceptional microwave shielding

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this