저궤도 우주환경하의 실란처리된 그래핀 첨가 나노 복합재료의 물성특성 = Paper : Characteristics of Silane Treated Graphene Filled Nanocomposites Exposed to Low Earth Orbit Space Environment

국문 초록 (Abstract)

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. 그결과 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.

다국어 초록 (Multilingual 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.

참고문헌 (Reference)

1 Edward, M.S, "Space Environment Effects on Spacecraft: LEO Materials Selection Guide, Part I"

2 Grossman, E, "Space Environment Effects on Polymers in Low Earth Orbit" 208 : 48-57, 2003

3 Reddy, M.R, "Review Effect of Low Earth Orbit Atomic Oxygen on Spacecraft Materials" 281-307, 1995

4 Packirisamy, S, "Review Atomic Oxygen Resistant Coatings for Low Earth Orbit Space Structures" 30 : 308-320, 1995

5 Kuilla, T, "Recent Advances in Graphene Based Polymer Composites" 35 (35): 2010-, 1375

6 Kleiman, J, "Protective Coatings for LEO Environments in Spacecraft Applications" 76-77 : 827-834, 1995

7 Cooper, R, "Protection of Polymer from Atomicoxygen Erosion Using Al2O3 Atomic Layer Deposition Coatings" 516 : 4036-4039, 2008

8 Louis, A.T, "NASA/SDIO Space Environmental Effects on Materials Workshop Part II" 1988

9 Louis, A.T, "NASA/SDIO Space Environmental Effects on Materials Workshop Part I" 1988

10 Liang, J, "Molecular-Level Dispersion of Graphene into Poly(vinyl alcohol)and Effective Reinforcement of their Nanocomposites" 19 (19): 2297-2302, 2009

11 Bob Piascik, "Mechanical Systems, and Manufacturing Roadmap" NASA 2012

12 Banks, B. A, "Low Earth Orbital Atomic Oxygen Interactions with Spacecraft Materials" NASA 2004

13 Terrones, M, "Interphases in Graphene Polymer-based Nanocomposites" 23 : 5302-5310, 2011

14 Dworak, D.P, "Evaluation of Protective Silicone/Siloxane Coatings in Simulated Low-Earth-Orbit Environment" 43 (43): 393-401, 2006

15 Jin, S. B, "Enhanced Durability of Silanized Multi-walled Carbon Nanotube/epoxy Nanocomposites under Simulated Low Earth Orbit Space Environment" 87 : 224-231, 2013

16 Wang, X, "Covalent Functionalization of Graphene with Organosilane and Its Use as a Reinforcement in Epoxy Composites" 72 (72): 737-743, 2012

17 Kuila, T, "Chemical Functionalization of Graphene and Its Applications" 57 (57): 1061-1105, 2012

18 Packirisamy, S, "Atomic Oxygen Resistant Coatings for Low Earth Orbit Space Structures" 30 : 308-320, 1995

19 Brunsvold, A.L, "An Investigation of the Resistance of POSS polyimide to Atomic Oxygen Attack" (SP-540) : 153-158, 2003