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Structural disjoining pressure induced solid particle removal from solid substrates using nanofluids.

Sangwook Lim1, Darsh Wasan1

  • 1Department of Chemical and Biological Engineering, Illinois Institute of Technology, Chicago, IL 60616, United States.

Journal of Colloid and Interface Science
|April 14, 2017
PubMed
Summary
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Nanofluids enhance solid particle detachment from surfaces by utilizing structural disjoining pressure. This mechanism, driven by nanoparticle layering, offers improved cleaning efficiency compared to pure liquids.

Area of Science:

  • Surface science
  • Nanotechnology
  • Colloid and surface chemistry

Background:

  • Nanofluids, nanoparticle suspensions in liquids, have diverse industrial uses.
  • Previous research identified structural disjoining pressure from nanoparticle layering as a mechanism for oily soil removal.
  • This study investigates applying this mechanism for solid particle detachment.

Purpose of the Study:

  • To explore the application of structural disjoining pressure for solid particle detachment using nanofluids.
  • To evaluate the effectiveness of nanofluids in removing particulate soil from glass and copper-coated wafer substrates.
  • To correlate detachment efficiency with calculated structural disjoining energy.

Main Methods:

  • Experiments were conducted using latex particles on glass and copper-coated wafer substrates.
Keywords:
DetergencyHard surface cleaningNanofluidsNanoparticlesParticulate soil removalStructural disjoining pressure

Related Experiment Videos

  • Nanofluids were employed to observe and quantify solid particle detachment.
  • Detachment efficiency was compared between nanofluids and pure liquids (e.g., water).

    • Main Results:

    • Nanofluids effectively detached solid particles (latex) from glass substrates via structural disjoining pressure.
    • Detachment efficiency increased with higher nanoparticle volume fractions.
    • Nanofluids demonstrated superior particulate soil removal from copper-coated wafers compared to pure liquids.
    • Detachment efficiency correlated well with calculated structural disjoining energy.

    Conclusions:

    • The structural disjoining pressure mechanism is effective for solid particle detachment from surfaces.
    • Nanofluids offer enhanced cleaning capabilities for hard surfaces compared to conventional liquids.
    • This research provides novel insights into applying structural disjoining energy for surface cleaning applications.