Elastomers and Composites

The Rubber Society of Korea (한국고무학회)
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Effect of Carbon-based Nanofillers on the Toughening Behavior of Epoxy Resin

  • Lee, Gi-Bbeum (Department of Polymer-Nano Science and Technology and Bionanotechnology and Bioconversence Engineering, Jeonbuk National University) ;
  • Kim, Haeran (Department of Polymer-Nano Science and Technology and Bionanotechnology and Bioconversence Engineering, Jeonbuk National University) ;
  • Shin, Wonjae (Department of Polymer-Nano Science and Technology and Bionanotechnology and Bioconversence Engineering, Jeonbuk National University) ;
  • Jeon, Jinseok (Department of Polymer-Nano Science and Technology and Bionanotechnology and Bioconversence Engineering, Jeonbuk National University) ;
  • Park, In-Seok (Department of Polymer-Nano Science and Technology and Bionanotechnology and Bioconversence Engineering, Jeonbuk National University) ;
  • Nah, Changwoon (Department of Polymer-Nano Science and Technology and Bionanotechnology and Bioconversence Engineering, Jeonbuk National University)
  • Received : 2021.09.09
  • Accepted : 2021.09.17
  • Published : 2021.09.30
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Abstract

Carbon-based nanofillers, including nanodiamond (ND) and carbon nanotubes (CNTs), have been employed in epoxy matrixes for improving the toughness, using the tow prepreg method, of epoxy compounds for high pressure tanks. The reinforcing performance was compared with those of commercially available toughening fillers, including carboxyl-terminated butadiene acrylonitrile (CTBN) and block copolymers, such as poly(methyl methacrylate)-b-poly(butyl acrylate)-b-poly(methyl methacrylate) (BA-b-MMA). CTNB improved the mechanical performance at a relatively high filler loading of ~5 phr. Nanosized BA-b-MMA showed improved performance at a lower filler loading of ~2 phr. However, the mechanical properties deteriorated at a higher loading of ~5 phr because of the formation of larger aggregates. ND showed no significant improvement in mechanical properties because of aggregate formation. In contrast, surface-treated ND with epoxidized hydroxyl-terminated polybutadiene considerably improved the mechanical properties, notably the impact strength, because of more uniform dispersion of particles in the epoxy matrix. CNTs noticeably improved the flexural strength and impact strength at a filler loading of 0.5 phr. However, the improvements were lost with further addition of fillers because of CNT aggregation.

Keywords

Acknowledgement

본 연구는 한국산업기술평가관리원(KEIT)의 연구비 지원을 받는 산업기술혁신사업(과제번호 20010851)을 통해 수행되었으며, 이에 감사드립니다.

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