Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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Fabrication and Mechanical Properties of Carbon Fiber Reinforced Polymer Composites with Functionalized Graphene Nanoplatelets

기능기화 된 그래핀 나노플레이틀릿이 첨가 된 탄소섬유 강화 고분자 복합소재의 제조 및 기계적 특성 연구

  • Cha, Jaemin (Department of Material Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Kim, Jun Hui (Department of Material Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Ryu, Ho Jin (Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Hong, Soon H. (Department of Material Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST))
  • Received : 2017.09.07
  • Accepted : 2017.10.31
  • Published : 2017.10.31
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Abstract

Carbon fiber is a material with excellent mechanical, electrical and thermal properties, which is widely used as a composite material made of a polymer matrix. However, this composite material has a weak point of interlaminar delamination due to weak interfacial bond with polymer matrix compared with high strength and elasticity of carbon fiber. In order to solve this problem, it is essential to use reinforcements. Due to excellent mechanical properties, graphene have been expected to have large improvement in physical properties as a reinforcing material. However, the aggregation of graphene and the weak interfacial bonding have resulted in failure to properly implement reinforcement effect. In order to solve this problems, dispersibility will be improved. In this study, functionalization of graphene nanoplatelet was proceeded with melamine and mixed with epoxy polymer matrix. The carbon fiber reinforced polymer composites were fabricated using the prepared graphene nanoplatelet/epoxy and flexural properties and interlaminar shear strength were measured. As a result, it was confirmed that the dispersibility of graphene nanoplatelet was improved and the mechanical properties of the composite material were increased.

탄소섬유는 매우 우수한 기계적, 전기적, 열적 특성을 가진 소재로써, 고분자를 매트릭스로 하는 복합재료로써 산업적으로 널리 쓰이고 있다. 하지만 이 복합재료는 높은 강도 및 탄성을 가진 탄소섬유에 비해, 약한 고분자 매트릭스로 인한 분리 형상이 약점으로 지적되고 있다. 이를 해결하기 위해 강화재의 첨가가 필수적이다. 그래핀은 매우 우수한 기계적 물성을 지닌 강화재로써, 첨가 시에 높은 물성 향상을 기대할 수 있다. 하지만 그래핀 자체의 응집현상과 고분자 기지와의 약한 결합이 강화효과를 제대로 구현해내지 못하는 결과를 초래하고 있다. 이러한 문제점을 해결하기 위한 핵심 기술로 제시된 것이 기능기화 방법이며, 이를 통해 분산성을 향상시킬 수 있다. 본 연구에서는 멜라민을 이용하여 그래핀 나노플레이틀릿의 기능기화를 진행하고, 이를 에폭시 고분자 기지와 혼합하였다. 제조된 그래핀 나노플레이틀릿/에폭시을 이용하여 탄소섬유 강화 고분자 복합재료를 제조하고 굽힘 특성과 층간전단강도를 측정하였다. 그 결과 복합재료의 기계적 물성이 증가되었으며, 그래핀 나노플레이틀릿의 분산성이 향상됨을 확인하였다.

Keywords

References

  1. Kim, K., Bae, K., Oh, S., Seo, M., Kang, C., and Park, S., "Trend of Carbon Fiber-reinforced Composites for Lightweight Vehicles," Elastomers and Composites, Vol. 47, No. 1, 2012, pp. 65-74. https://doi.org/10.7473/EC.2012.47.1.065
  2. Kwon, D., Choi, J., Shin, P., Lee, H., Lee, M., Park J., and Park J., "Prediction of Wetting and Interfacial Property of CNT Reinforced Epoxy on CF Tow Using Electrical Resistance Method," Composites Research, Vol. 28, No. 4, 2015, pp. 232-238. https://doi.org/10.7234/composres.2015.28.4.232
  3. Kinloch, A.J., Lee, S.H., and Taylor, A.C., "Improving the Fracture Toughness and the Cyclic-fatigue Resistance of Epoxypolymer Blends", Polymer, Vol.55, 2014, pp. 5325-6334.
  4. Ma, P., Siddiqui, N.A., Marom, G., and Kim, J., "Dispersion and Functionalization of Carbon Nanotubes for Polymer-based Nanocomposites: A Review," Composites: Part A, Vol. 41, 2010, pp. 1345-1367. https://doi.org/10.1016/j.compositesa.2010.07.003
  5. Pathak, A.K., Borah, M., Gupta, A., and Tokozeki, T., "Improved Mechanical Properties of Carbon Fiber/Graphene Oxide-Epoxy Hybrid Composites," Composites Science and Technology, Vol. 135, 2016, pp. 28-38. https://doi.org/10.1016/j.compscitech.2016.09.007
  6. Zhu, J., Peng, H., Rodriguez-Macias, F., Margrave, J.L., Khabashesku, V.N., Imam, A.M., Lozano, K., and Barrera, E.V., "Reinforcing Epoxy Polymer Composites Through Covalent Integration of Functionalized Nanotubes," Advanced Functional Materials, Vol. 14, No. 7, 2004, pp. 643-648. https://doi.org/10.1002/adfm.200305162
  7. Cha, J., Jin, S., Shim, J.H., Park C.S., Ryu H.J., Hong, S.H., "Functionalization of Carbon Nanotubes for Fabrication of CNT/Epoxy Nanocomposites," Materials and Design, Vol. 95, 2016, pp. 1-8. https://doi.org/10.1016/j.matdes.2016.01.077
  8. Ramanathan, T., Fisher, F.T., Ruoff, R.S., and Brinson L.C., "Amino-Functionalized Carbon Nanotubes for Binding to Polymers and Biological Sysytems," Chemical Materials, Vol. 17, No. 6, 2005, pp. 1290-1295. https://doi.org/10.1021/cm048357f