Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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Simultaneous Exfoliation and Dispersion of Graphene/Carbon Nanotube via Intercalation Reaction and Its Application as Conductive Composite Film

층간삽입 반응을 이용한 그래핀/탄소나노튜브 동시 개별 분산 및 전도성 복합 필름으로의 응용

  • Kim, Jungmo (Department of Materials Science and Engineering, KAIST) ;
  • Kim, Jin (Department of Materials Science and Engineering, KAIST) ;
  • Yoon, Hyewon (Department of Materials Science and Engineering, KAIST) ;
  • Park, Minsu (Department of Materials Science and Engineering, KAIST) ;
  • Novak, Travis (Department of Materials Science and Engineering, KAIST) ;
  • Ashraful, Azam (Department of Materials Science and Engineering, KAIST) ;
  • Lee, Jinho (Department of Materials Science and Engineering, KAIST) ;
  • Jeon, Seokwoo (Department of Materials Science and Engineering, KAIST)
  • Received : 2016.03.22
  • Accepted : 2016.06.28
  • Published : 2016.06.30
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Abstract

This paper reports a novel method for simultaneous exfoliation of graphene and dispersion of carbon nanotube by using intercalation method. In common, graphene flake and carbon nanotubes can be produced through individual exfoliation or debundling process, but the process require significant amount of time. Here, potassium sodium tartrate was thermally intercalated into graphite and carbon nanotube bundle for simultaneous exfoliation and dispersion of graphene and carbon nanotubes. We confirmed expansion of interlayer distance via XRD, and also found that oxidation level of the exfoliated materials were significantly low (below 8.3 at%). The produced materials are fabricated in to conductive composite film via vacuum filtration and spray deposition to show enhancement of conductive properties.

본 논문은 층간 삽입 반응을 이용하여 그래핀을 박리하는 동시에 탄소나노튜브를 개별 분산시키고 이를 복합 필름으로 제조한 결과를 보고한다. 일반적으로 그래핀과 탄소나노튜브의 경우 흑연과 탄소나노튜브 번들로부터의 개별적 박리를 통해 제조될 수 있으나 장시간의 공정 시간을 요구하게 된다. 본 연구에서는 그래핀과 탄소나노튜브의 동시 박리 및 분산을 위해 흑연 및 탄소나노튜브 번들 내로 포타슘 소듐 타르트레이트를 삽입했으며 XRD 분석을 통해 흑연 층간 거리 및 탄소나노노튜브 번들 내 거리의 증가를 확인했다. 제조된 층간삽입화합물로부터 박리된 그래핀 및 탄소나노튜브의 경우 매우 낮은 산화도(< 8.3 at%)를 나타냈으며 제조된 물질을 여과 장치 및 스프레이 전사를 통해 복합 필름으로 제조한 결과 그래핀 및 탄소나노튜브의 단일 필름에 대비하여 복합 필름의 경우 전도성의 향상을 보였다.

Keywords

References

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