Graphene oxide papers modified by divalent ions - Enhancing mechanical properties via chemical cross-linking

Sungjin Park; Kyoung Seok Lee; Gulay Bozoklu; Weiwei Cai; Son Binh T. Nguyen; Rodney S. Ruoff

doi:10.1021/nn700349a

Graphene oxide papers modified by divalent ions - Enhancing mechanical properties via chemical cross-linking

Sungjin Park, Kyoung Seok Lee, Gulay Bozoklu, Weiwei Cai, Son Binh T. Nguyen, Rodney S. Ruoff^*

^*Corresponding author for this work

Chemistry

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

1343 Scopus citations

Abstract

Significant enhancement in mechanical stiffess (10-200%) and fracture strength (∼50%) of graphene oxide paper, a novel paperlike material made from individual graphene oxide sheets, can be achieved upon modification with a small amount (less than 1 Wt%) of Mg²⁺ and Ca²⁺. These results can be readily rationalized in terms of the chemical interactions between the functional groups of the graphene oxide sheets and the divalent metals ions. While oxygen functional groups on the basal planes of the sheets and the carboxylate groups on the edges can both bond to Mg²⁺ and Ca²⁺, the main contribution to mechanical enhancement of the paper comes from the latter.

Original language	English (US)
Pages (from-to)	572-578
Number of pages	7
Journal	ACS nano
Volume	2
Issue number	3
DOIs	https://doi.org/10.1021/nn700349a
State	Published - Mar 2008

Keywords

Cross-linking
Divalent ion
Graphene oxide
Graphene oxide paper
Graphite
Mechanical property

ASJC Scopus subject areas

Materials Science(all)
Engineering(all)
Physics and Astronomy(all)

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abstract = "Significant enhancement in mechanical stiffess (10-200%) and fracture strength (∼50%) of graphene oxide paper, a novel paperlike material made from individual graphene oxide sheets, can be achieved upon modification with a small amount (less than 1 Wt%) of Mg2+ and Ca2+. These results can be readily rationalized in terms of the chemical interactions between the functional groups of the graphene oxide sheets and the divalent metals ions. While oxygen functional groups on the basal planes of the sheets and the carboxylate groups on the edges can both bond to Mg2+ and Ca2+, the main contribution to mechanical enhancement of the paper comes from the latter.",

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AU - Cai, Weiwei

AU - Nguyen, Son Binh T.

AU - Ruoff, Rodney S.

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Graphene oxide papers modified by divalent ions - Enhancing mechanical properties via chemical cross-linking

Abstract

Keywords

ASJC Scopus subject areas

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