Carbon letters

  • Volume 23
  • /
  • Pages.55-62
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  • 2017
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  • 1976-4251(pISSN)
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  • 2233-4998(eISSN)
Korean Carbon Society (한국탄소학회)
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Dispersions of partially reduced graphene oxide in various organic solvents and polymers

  • Kim, Hye Min (Department of Chemical Engineering, Donga-A University) ;
  • Kim, Seo Gyun (Department of Chemical Engineering, Donga-A University) ;
  • Lee, Heon Sang (Department of Chemical Engineering, Donga-A University)
  • Received : 2017.05.10
  • Accepted : 2017.05.24
  • Published : 2017.07.31
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Abstract

We report on the dispersion state of partially reduced graphene oxide (PRGO) in organic solvents, namely methyl ethyl ketone, ethyl acetate, methylene chloride, toluene, and xylene, by controlling the carbon to oxygen (C/O) atomic ratio of the PRGOs. A two-phase solvent exchange method is also proposed to transfer PRGO from water to an aprotic solvent, such as methyl ethyl ketone. We achieve relatively good dispersion in aprotic and non-polar solvents by controlling the C/O atomic ratio of the PRGOs and applying the two-phase solvent exchange method. There is an increase in the glass transition temperatures with the dispersion of PRGOs into amorphous polymers, in particular a $4.4^{\circ}C$ increase for poly(methyl methacrylate) and $3.0^{\circ}C$ increase for polycarbonate. Good dispersion of PRGO in a nonpolar polymer, such as linear low density polyethylene, is also obtained.

Keywords

References

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