Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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Characteristics of Silane Treated Graphene Filled Nanocomposites Exposed to Low Earth Orbit Space Environment

저궤도 우주환경하의 실란처리된 그래핀 첨가 나노 복합재료의 물성특성

  • Noh, Jae-Young (Hanwha Corporation R&D Center) ;
  • Jin, Seung-Bo (Department of Launch Vehicle System Integration, Korea Aerospace Research Institute) ;
  • Kim, Chun-Gon (Dept. of Aerospace Engineering, Korea Advanced Institute of Science and Technology)
  • Received : 2015.03.30
  • Accepted : 2015.06.30
  • Published : 2015.06.30
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Abstract

This study investigates the property of graphene filled polymer nanocomposites in LEO(Low Earth orbit) environment conditions. In order to improve compatibility with polymer matrices and resistance of carbon material against AO(Atomic oxygen) attack, silanization of graphene oxide with organosilane was carried out. The corresponding moieties were characterized through X-ray photoelectron spectroscopy (XPS). Graphene oxide filled nanocomposites were prepared using solution based processing methods. The sets of specimen series were tested in an accelerated LEO simulated space environment facility. Graphene oxide and silane treated graphene oxide reinforced nanocomposites were compared with neat epoxy. The comparison revealed that the silane treated graphene filled polymer composite shows inherent resistance against atomic oxygen attack while the lack of silane treatment resulted in a reduction in performance.

이 논문은 저궤도 우주환경하에서 그래핀 충진 고분자 나노복합재료에 대한 물성 변화를 고찰하였다. 고분자 기지재와의 적합성과 원자산소 공격에 대한 탄소재료의 저항성을 향상시키기 위해 유기실란으로 그래핀 옥사이드의 표면을 실란처리를 수행하였다. 실란이 그래핀 옥사이드 표면에 결합여부를 XPS 장비를 사용하여 분석하였다. 실란 처리된 그래핀 옥사이드와 실란 처리하지 않은 그래핀 옥사이드를 강화재로 사용한 나노복합재료를 제작하여 순수 에폭시와 인장물성을 비교하였으며, 모사된 저궤도 우주환경에서의 물성 변화를 관찰하였다. 그 결과 실란처리를 하여 그래핀 나노 복합재료를 제작할 경우 우주환경요소 중 원자 산소에 저항성을 가지는 것을 확인하였으며, 실란처리를 하지 않은 경우에는 오히려 성능이 감소함을 확인할 수 있었다.

Keywords

References

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