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Improvement of interlaminar properties of carbon fiber‑reinforced epoxy composites using aluminum trihydroxide

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2019, 29(2), pp.183-191
  • DOI : 10.1007/s42823-019-00019-x
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : June 15, 2018
  • Accepted : April 8, 2019
  • Published : April 1, 2019

Dong-Jun Kwon 1 Park Sung Min 1 KWON IL JUN 1 Park, Joung-Man 2 Jeong Eui gyung 3

1다이텍 (DYETEC) 연구원
2경상대학교
3경북대학교

Accredited

ABSTRACT

This study provides an economical and effective method to improve the interlaminar properties of carbon fiber-reinforced polymers (CFRPs) using aluminum trihydroxide (ATH) microparticles. ATH microparticles are cheap and are expected to show good affinity to epoxies in the matrix and sizing agents of the carbon fibers owing to the presence of three hydroxyl groups. In addition, ATH particles are reported to improve the mechanical properties of polymers when used as the reinforcement. In this study, ATH microparticles of various sizes, 1.5, 10, and 20 µm, were used to improve the interlaminar properties of the CFRPs. ATH particles with a size of 1.5 μm improved the tensile properties of the ATH/epoxy resin and did not significantly alter the curing behavior. The interfacial adhesion between the carbon fiber and the epoxy resin was also improved, and the impregnation of the resin mixture remained similar to that of the neat resin, resulting in no significant void and defect formation. Considering the above results, the resulting 1.5 μm ATH-reinforced CFRP showed improved interlaminar properties compared to CFRP without ATH. However, 10 and 20 μm ATH-reinforced CFRPs showed deteriorated interlaminar properties due to the diminished tensile properties of the resin itself and resin impregnation, which resulted in more voids and defects, despite the interfacial adhesion between the fiber and the matrix resin.

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