Influence of nanomodifiers on the properties of carbon composites

1Man'ko, TA, 2Gusarova, IA, 2Potapov, OM, 3Solodkii, Ye.V
1Oles Honchar National University of Dnipro, Dnipro, Ukraine
2Yangel Yuzhnoye State Design Office, Dnipro, Ukraine
3National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv, Ukraine
Space Sci. & Technol. 2020, 26 ;(5):015-021
Publication Language: Ukrainian
The properties of carbon composites depend on the interaction at the “filler-matrix” phase boundary. One of the most effective ways to increase interphase adhesion is the introduction of modifying nanoadditives into the matrix. By reinforcing the matrix, the mechanical properties of the carbon composite can be improved.We conducted the analysis of various nanomodifiers of the nanocarbon family, which includes fullerenes, nanotubes, graphenes, and nanodiamonds. Unique characteristics combined with moderate cost price and commercial availability distinguish well nanodiamonds from other nanoparticles. The paper demonstrates the feasibility of modifying the HUNTSMAN epoxy binder with nanodiamonds having a small and uniform size, a spherical particle shape, and an accessible outer surface.
         We present the technology of introducing nanodiamonds into an epoxy binder and manufacturing of carbon composites on its basis. Nanodiamonds were introduced into the light-flow solvent tetrahydrofuran under the influence of ultrasound providing a good dispersing medium. To determine the optimal content of nanomodifiers, allowing to increase interfacial adhesion, a multi-component epoxy binder HUNTSMAN based on Araldite LY556 resin, Aradur 917 hardener, and Accelerator DY 070 accelerator was investigated with nanodiamonds content of 0.26, 0.52, 2.6, 5.2, and 10.4 wt. %.
          We found that the introduction of nanodiamonds in an amount of 2.6 wt. % allows us to increase the hardness of materials up to 50 %. We show that introducing a minimum amount of nanomodifiers, containing up to 0.26 wt. %, into the epoxy binder gives a maximum increase in the strength characteristics of nanomodified carbon composites up to 18 %.
         The work was carried out under the Horizon-2020 grant agreement.
Keywords: carbon composite, epoxy resin, microstructure, nano-diamonds, strength
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