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Mechanical Properties of Epoxy Paint using Oxidized Graphene Nanoplatelet as a Reinforcement

산화 그래핀 나노플레이트릿을 강화제로 사용한 에폭시 도료의 역학적 특성

  • Seo, Won-Woo (Dept. of Architectural Eng., Chungnam National University) ;
  • Kim, Gyu-Yong (Dept. of Architectural Eng., Chungnam National University) ;
  • Yoon, Min-Ho (Dept. of Architectural Eng., Chungnam National University) ;
  • Lee, Bo-Kyeong (Dept. of Architectural Eng., Chungnam National University) ;
  • Nam, Jeong-Soo (Dept. of Architectural Eng., Chungnam National University)
  • Received : 2017.08.30
  • Accepted : 2017.09.19
  • Published : 2017.10.20

Abstract

In this study, oxidized graphene nanoplatelet(GO) was prepared by oxidizing graphene nanoplatelet(GNP) with nitric acid in order to solve the problem of dispersion of GNP, one of nano materials. The surface chemical composition of the prepared GO was analyzed by fourier transform infrared spectroscopy(FT-IR) before incorporation into the epoxy paint, and the dispersibility in the solvent was confirmed. Meanwhile, GNP/Epoxy and GO/Epoxy paint were prepared by mixing GNP, GO with 0.1, 0.3, 0.5 and 1.0wt.% in epoxy paint and the mechanical properties were evaluated. As a result, GNP/Epoxy and GO/Epoxy paints showed better mechanical properties than Neat Epoxy which did not incorporate GNP, GO. Especially, when 0.3wt.% of GO was incorporated into epoxy resin, it showed higher tensile strength than Neat Epoxy. It was confirmed that acid treatment of GNP was effective in improving the mechanical properties of epoxy paint.

본 연구에서는 그래핀 나노플레이트릿(Graphene nanoplatelet ; GNP)의 분산에 대한 문제를 해결하고자 질산으로 이를 산화시켜 GO를 제조하였다. 이렇게 제조한 GO를 에폭시 도료에 혼입하기 전, 푸리에변환적외선분광법(Fourier transform infrared spectroscopy; FT-IR)을 이용한 화학조성 분석과 용매에서의 분산안정성을 확인하였다. 그 후, GNP, GO를 에폭시 도료에 0.1, 0.3, 0.5, 1.0wt.% 혼입하여 GNP/Epoxy, GO/Epoxy 도료를 제조하고 역학적 특성을 평가하였다. 실험 결과, FT-IR 분석을 통해 GO에서 하이드록시기, 에폭시기, 카르복시기 기능기가 생성된 것을 확인할 수 있었다. 또한, GO는 GNP보다 증류수와 에탄올에서 분산안정성이 향상되는 것을 확인하였다. 한편, GO/Epoxy 도료는 Neat Epoxy, GNP/Epoxy에 비해 역학적 특성이 향상되었으며, 특히 0.3wt.% 혼입률에서 높은 역학적 특성을 나타내었다. 따라서 GO를 에폭시 수지에 강화제로써 혼입할 경우 에폭시 도료의 역학적 특성을 향상시키는데 효과적인 것으로 판단된다.

Keywords

References

  1. Thomas NL. The barrier properties of paint coatings. Progress in Organic Coatings. 1991 May;19(2):101-21. https://doi.org/10.1016/0033-0655(91)80001-Y
  2. Mizutani T, Arai K, Miyamoto M, Kimura Y. Application of silica-containing nano-composite emulsion to wall paint: A new environmentally safe paint of high performance. Progress in Organic Coatings. 2006 Mar;55(3):276-83. https://doi.org/10.1016/j.porgcoat.2005.12.001
  3. Khan SU, Munir A, Hussain R, Kim JK. Fatigue damage behaviors of carbon fiber-reinforced epoxy composites containing nanoclay. Composites Science and Technology. 2010 Nov;70(14):2077-85. https://doi.org/10.1016/j.compscitech.2010.08.004
  4. Xu S, Girouard N, Schueneman G, Shofner ML, Meredith JC. Mechanical and thermal properties of waterborne epoxy composites containing cellulose nanocrystals. Polymer. 2013 Nov;54(24):6589-98. https://doi.org/10.1016/j.polymer.2013.10.011
  5. Gojny FH, Wichmann MHG, Kopke U, Fiedler B, Schulte K. Carbon nanotube-reinforced epoxy-composites: enhanced stiffness and fracture toughness at low nanotube content. Composites science and technology. 2004 Nov;64(15):2363-71. https://doi.org/10.1016/j.compscitech.2004.04.002
  6. Ji QL, Zhang MQ, Rong MZ, Wetzel B, Friedrich K. Friction and wear of epoxy composites containing surface modified SiC nanoparticles. Tribology Letters. 2005 Oct;20(2):115-23. https://doi.org/10.1007/s11249-005-8301-3
  7. Tang LC, Wan YJ, Yan D, Pei YB, Zhao L, Li YB, Lai GQ. The effect of graphene dispersion on the mechanical properties of graphene/epoxy composites. Carbon. 2013 Aug;60:16-27. https://doi.org/10.1016/j.carbon.2013.03.050
  8. Naebe M, Wang J, Amini A, Khayyam H, Hameed N, Li LH, Fox B. Mechanical property and structure of covalent functionalised graphene/epoxy nanocomposites [Internet]. London: Scientific reports; 2014 Mar 14. Available from: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3953726/?report=classic
  9. Ahmadi-Moghadam B, Sharafimasooleh M, Shadlou S, Taheri F. Effect of functionalization of graphene nanoplatelets on the mechanical response of graphene/epoxy composites. Materials & Design. 2015 Feb;66:142-9. https://doi.org/10.1016/j.matdes.2014.10.047
  10. Shiu SC, Tsai JL. Characterizing thermal and mechanical properties of graphene/epoxy nanocomposites. Composites Part B: Engineering. 2014 Jan;56:691-7. https://doi.org/10.1016/j.compositesb.2013.09.007
  11. Kim SC, Lee HI, Jeong HM, Kim BK, Kim JH, Shincm. Effect of pyrene treatment on the properties of graphene/epoxy nanocomposites. Macromolecular research. 2010 Nov;18(11):1125-8. https://doi.org/10.1007/s13233-010-1105-9
  12. Wan YJ, Gong LX, Tang LC, Wu LB, Jiang JX. Mechanical properties of epoxy composites filled with silane-functionalized graphene oxide. Composites Part A: Applied Science and Manufacturing. 2014 Sep;64:79-89. https://doi.org/10.1016/j.compositesa.2014.04.023