Self-assembly of nanoparticles and flake powders by flake design strategy via dry particle coating

Genlian Fan, Qibing Liu, Akira Kondo, Makio Naito, Kizuku Kushimoto, Junya Kano, Zhanqiu Tan, Zhiqiang Li

Research output: Contribution to journalArticlepeer-review


To achieve uniform dispersion of nanoparticles is an essential prerequisite to fully exhibit their enhancement effect in various composites. In this work, we propose an effective method to achieve the uniform dispersion of high content of nanoparticles in nanoflake powder by a flake design strategy through a dry particle coating method. It relies on the self-assembly of the nanoparticles on flake powders through mechanical forces when they are forced to pass through a narrow clearance during high-speed rotating. It is shown that uniform dispersion of 6 wt% TiO2 nanoparticles on Al nanoflakes could be easily achieved after being processed at suitable condition. The DEM simulation results show that best dispersion occurs when the impact energy in both the normal and tangential direction is comparable, which provide effective collision to de-agglomerate the nanoparticles and attached them to nanoflakes.

Original languageEnglish
Article number118294
JournalPowder Technology
Publication statusPublished - 2023 Mar 15


  • Dry particle coating
  • Flake powder
  • Mechanical powder processing
  • Nanoparticle dispersion
  • Self-assembly of particles

ASJC Scopus subject areas

  • Chemical Engineering(all)


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