Effects of reduction and size of graphene on mechanical and electrical properties of graphene oxide papers

Xiuyi Lin, Qingbin Zheng, Nariman Yousefi, Kan Kan Yeung, Xi Shen, Jang Kyo Kim

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

The effects of graphene oxide (GO) size and reduction method on mechanical property and electrical conductivity of GO papers are studied. GO sheets are prepared using the modified Hummers method and GO papers are fabricated through vacuum filtration of GO aqueous dispersions. To study the size effect, the as-prepared GO dispersion is sorted into four different groups with uniform sizes after repeated centrifugation and collection of supernatant. It is found that the Young's modulus, tensile strength and electrical conductivity increase consistently with increasing the GO size. Three methods, including hydrazine reduction, hydrogen iodide reduction and thermal treatment, are employed to reduce the GO sheets. The highest electrical conductivity of 139,000 S/m is obtained after thermal reduction. The mechanisms responsible for these observations are discussed based on the elemental, structural and morphological analyses of GO and reduced GO sheets.

Original languageEnglish
Title of host publicationECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials
PublisherEuropean Conference on Composite Materials, ECCM
ISBN (Print)9788888785332
Publication statusPublished - Jun 2012
Externally publishedYes
Event15th European Conference on Composite Materials: Composites at Venice, ECCM 2012 - Venice, Italy
Duration: 24 Jun 201228 Jun 2012

Publication series

NameECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials

Conference

Conference15th European Conference on Composite Materials: Composites at Venice, ECCM 2012
Country/TerritoryItaly
CityVenice
Period24/06/1228/06/12

Keywords

  • Graphene oxide
  • Graphene oxide paper
  • Mechanical property

ASJC Scopus subject areas

  • Ceramics and Composites

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