Effects of graphene sheet size on electrical conductivity and percolation of graphene aerogel/epoxy composites

Ne Myo Han; Zhenyu Wang; Xi Shen; Ying Wu; Xu Liu; Qingbin Zheng; Jang Kyo Kim

Effects of graphene sheet size on electrical conductivity and percolation of graphene aerogel/epoxy composites

Ne Myo Han, Zhenyu Wang, Xi Shen, Ying Wu, Xu Liu, Qingbin Zheng, Jang Kyo Kim

Research output: Unpublished conference presentation (presented paper, abstract, poster) › Conference presentation (not published in journal/proceeding/book) › Academic research › peer-review

4 Citations (Scopus)

Abstract

By varying the size of precursor graphene oxide (GO) sheets, unidirectional graphene aerogels (UGAs) with a wide range of density, alignment and electrical conductivity are prepared. UGAs prepared using ultralarge graphene oxide (UL-UGA) exhibit a low density, a high degree of alignment and a high electrical conductivity. Solid epoxy composites prepared by infiltrating liquid epoxy resin into the UL-UGA structure exhibit an ultralow percolation threshold of 0.0066 vol.%, and a unique anisotropic electrical conductivity. In addition to its electrical conductivity, UL-UGA is shown to be an effective toughening filler, capable of increasing the fracture toughness of epoxy by 69% at 0.11 vol.% graphene content.

Original language	English
Publication status	Published - Aug 2017
Externally published	Yes
Event	21st International Conference on Composite Materials, ICCM 2017 - Xi'an, China Duration: 20 Aug 2017 → 25 Aug 2017

Conference

Conference	21st International Conference on Composite Materials, ICCM 2017
Country/Territory	China
City	Xi'an
Period	20/08/17 → 25/08/17

Keywords

Electrical conductivity
Fracture toughness
Graphene aerogel
Percolation
Sheet size

ASJC Scopus subject areas

General Engineering
Ceramics and Composites

Cite this

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title = "Effects of graphene sheet size on electrical conductivity and percolation of graphene aerogel/epoxy composites",

abstract = "By varying the size of precursor graphene oxide (GO) sheets, unidirectional graphene aerogels (UGAs) with a wide range of density, alignment and electrical conductivity are prepared. UGAs prepared using ultralarge graphene oxide (UL-UGA) exhibit a low density, a high degree of alignment and a high electrical conductivity. Solid epoxy composites prepared by infiltrating liquid epoxy resin into the UL-UGA structure exhibit an ultralow percolation threshold of 0.0066 vol.%, and a unique anisotropic electrical conductivity. In addition to its electrical conductivity, UL-UGA is shown to be an effective toughening filler, capable of increasing the fracture toughness of epoxy by 69% at 0.11 vol.% graphene content.",

keywords = "Electrical conductivity, Fracture toughness, Graphene aerogel, Percolation, Sheet size",

author = "Han, {Ne Myo} and Zhenyu Wang and Xi Shen and Ying Wu and Xu Liu and Qingbin Zheng and Kim, {Jang Kyo}",

note = "Publisher Copyright: {\textcopyright} 2017 International Committee on Composite Materials. All rights reserved.; 21st International Conference on Composite Materials, ICCM 2017 ; Conference date: 20-08-2017 Through 25-08-2017",

year = "2017",

month = aug,

language = "English",

}

Effects of graphene sheet size on electrical conductivity and percolation of graphene aerogel/epoxy composites. / Han, Ne Myo; Wang, Zhenyu; Shen, Xi et al.
2017. Paper presented at 21st International Conference on Composite Materials, ICCM 2017, Xi'an, China.

Research output: Unpublished conference presentation (presented paper, abstract, poster) › Conference presentation (not published in journal/proceeding/book) › Academic research › peer-review

TY - CONF

T1 - Effects of graphene sheet size on electrical conductivity and percolation of graphene aerogel/epoxy composites

AU - Han, Ne Myo

AU - Wang, Zhenyu

AU - Shen, Xi

AU - Wu, Ying

AU - Liu, Xu

AU - Zheng, Qingbin

AU - Kim, Jang Kyo

PY - 2017/8

Y1 - 2017/8

N2 - By varying the size of precursor graphene oxide (GO) sheets, unidirectional graphene aerogels (UGAs) with a wide range of density, alignment and electrical conductivity are prepared. UGAs prepared using ultralarge graphene oxide (UL-UGA) exhibit a low density, a high degree of alignment and a high electrical conductivity. Solid epoxy composites prepared by infiltrating liquid epoxy resin into the UL-UGA structure exhibit an ultralow percolation threshold of 0.0066 vol.%, and a unique anisotropic electrical conductivity. In addition to its electrical conductivity, UL-UGA is shown to be an effective toughening filler, capable of increasing the fracture toughness of epoxy by 69% at 0.11 vol.% graphene content.

AB - By varying the size of precursor graphene oxide (GO) sheets, unidirectional graphene aerogels (UGAs) with a wide range of density, alignment and electrical conductivity are prepared. UGAs prepared using ultralarge graphene oxide (UL-UGA) exhibit a low density, a high degree of alignment and a high electrical conductivity. Solid epoxy composites prepared by infiltrating liquid epoxy resin into the UL-UGA structure exhibit an ultralow percolation threshold of 0.0066 vol.%, and a unique anisotropic electrical conductivity. In addition to its electrical conductivity, UL-UGA is shown to be an effective toughening filler, capable of increasing the fracture toughness of epoxy by 69% at 0.11 vol.% graphene content.

KW - Electrical conductivity

KW - Fracture toughness

KW - Graphene aerogel

KW - Percolation

KW - Sheet size

UR - http://www.scopus.com/inward/record.url?scp=85053104696&partnerID=8YFLogxK

M3 - Conference presentation (not published in journal/proceeding/book)

AN - SCOPUS:85053104696

T2 - 21st International Conference on Composite Materials, ICCM 2017

Y2 - 20 August 2017 through 25 August 2017

ER -

Effects of graphene sheet size on electrical conductivity and percolation of graphene aerogel/epoxy composites

Abstract

Conference

Keywords

ASJC Scopus subject areas

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