Impermeable gas barrier coating by facilitated diffusion of ethylenediamine through graphene oxide liquid crystals

Dae Woo Kim, Hanim Kim, Ming Liang Jin, Christopher J. Ellison

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


A highly impermeable gas barrier coating is developed by intercalating ethylenediamine (EDA) into the nanochannels of graphene oxide (GO). The diffusion of EDA is facilitated in aqueous GO liquid crystal (LC) scaffolds, and the intercalation can be achieved spontaneously in a few seconds. The intercalated EDA not only crosslinks GO but also induces chemical reduction of GO to RGO, making the RGO/EDA coating stable in water. Remarkably, the RGO/EDA coating exhibits extremely low gas permeability ranging from 0.006 to 0.02 barrer for He, H 2 , N 2 , and CO 2 , similar to that of a neat GO film and exceeding the barrier performance of conventional polymers or their composite materials with graphene or nanoclay. The excellent barrier properties can be attributed to the high tortuosity caused by the well-aligned structure of high-aspect-ratio graphene sheets. In addition, the viscoelastic rheological properties of the GOLC could be beneficial for coating RGO/EDA on various substrates with different geometries where gas barrier properties are needed.

Original languageEnglish (US)
Pages (from-to)28-35
Number of pages8
StatePublished - Jul 2019

Bibliographical note

Funding Information:
This work was supported by Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education ( 2015R1A6A3A04057367 ).

Publisher Copyright:
© 2019 Elsevier Ltd


  • Composite
  • Diamine
  • Gas barrier
  • Graphene oxide
  • Liquid crystal


Dive into the research topics of 'Impermeable gas barrier coating by facilitated diffusion of ethylenediamine through graphene oxide liquid crystals'. Together they form a unique fingerprint.

Cite this