![]() To solve the above contradictions, polymer-based dispersants, such as silane coupling agent KH550 ( 11), polyether-sulfone ( 12), and polyvinyl alcohol ( 13), are nowadays mostly grafted on the surface of GO or Gr to improve their dispersibility in organic solutions. In contrast, the dispersion of PEEK in organic solvents such as dimethylformamide (DMF) and N-methylpyrrolidone is much better than in water. However, the interaction forces between Gr sheets result in poor dispersion in most solvents, and even its derivative graphene oxide (GO) only shows good dispersion in water. In comparison, solution blending is the ideal dispersion process for graphene-reinforced conventional thermoplastic composites ( 10). But it is difficult to exfoliate Gr nanosheets by stirring, and Gr is also not dispersed in the matrix via melt blending because of the low melt index of PEEK. The mechanical properties, and electrical and thermal conductivity of the nanocomposites are significantly improved after the incorporation of Gr ( 6, 7, 8).Īs is well known that the dispersion of nanofillers in the matrix is closely related to the performance of nanocomposites ( 9). In recent years, many efforts have been made to dope conductive nanomaterials into PEEK matrix, especially graphene (Gr) with high electrical conductivity, high thermal conductivity, and large specific surface area as fillers. However, the non-conductive property of PEEK severely limits its application in electromagnetic shield, static protection, and lightning protection ( 4), which does not meet the needs of integration of material structure and function and equipment light-weighting ( 5). ![]() As an engineering plastic with good thermal stability, chemical resistance, and excellent mechanical properties, poly ether ether ketone (PEEK) shows great advantages in areas such as aerospace and information technology ( 1, 2, 3).
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