Identifying the colloidal fouling behavior on the sharkskin-mimetic surface: In-situ monitoring and lattice Boltzmann simulation

Cheol Hun Yoo, Gi Wook Lee, Wansuk Choi, Min Gyu Shin, Changhoon Lee, Jeong Han Shin, Yong Son, Byoungjin Chun, Jung-hyun Lee, Hyun Wook Jung, Jong Suk Lee

Research output: Contribution to journalArticle

Abstract

Sharkskin-mimetic (Sharklet) patterning has proven effective to enhance the fouling resistance of the surface. Herein, we systematically investigated the colloidal fouling behavior on the Sharklet-patterned polyurethane (PUA) surfaces with different pattern spacings (1.5, 2 and 6 µm) by performing both in-situ monitoring and lattice Boltzmann (LB) simulations. Our careful in-situ monitoring of the movement of polystyrene model foulant particles (0.9 µm diameter) revealed that varying the pattern spacing differentiated both the degree and local distribution of colloidal fouling on the Sharklet-patterned surface. Specifically, the 2 µm-spaced pattern exhibited the least fouling among three different spacing patterns. Furthermore, fouling was predominant in the periphery of each pattern unit for the 1.5 µm-spaced pattern, while it was most severe in the region between the neighboring protrusions for the 6 µm-spaced patterns. Interestingly, the LB simulation enabled the qualitative tracking of individual foulants on the Sharklet-patterned surface, which was consistent with the experimental observations. It suggested that the distribution of the deposited foulants is strongly related to the magnitude and direction of the local hydrodynamic force exerted on the foulants. Our proposed synergistic approach provides a new platform for the evaluation of the fouling behavior on patterned surfaces.

Original languageEnglish
Article number126617
JournalChemical Engineering Journal
Volume405
DOIs
Publication statusPublished - 2021 Feb 1

Keywords

  • Colloidal fouling
  • Lattice Boltzmann simulation
  • Pattern spacing
  • Sharklet
  • Sharkskin-mimetic

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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