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Surface-Wettability Patterning for Distributing High-Momentum Water Jets on Porous Polymeric Substrates.

Uddalok Sen1, Souvick Chatterjee1, Pallab Sinha Mahapatra2

  • 1Department of Mechanical and Industrial Engineering, University of Illinois at Chicago , Chicago, Illinois 60607, United States.

ACS Applied Materials & Interfaces
|January 6, 2018
PubMed
Summary
This summary is machine-generated.

A new wettability-patterning technique effectively controls liquid distribution on porous nonwoven materials. This method ensures uniform liquid spread and dispensing from specific points, crucial for applications like heat transfer and filtration.

Keywords:
filtrationhydrophilichydrophobicincontinence productsjet impingementliquid absorptionnonwovenswettability patterning

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Area of Science:

  • Fluid dynamics
  • Materials science
  • Surface science

Background:

  • Liquid jet impingement on porous materials is vital for heat transfer, filtration, and absorbent products.
  • Controlling liquid penetration and distribution at the impact zone is a key challenge.
  • Existing methods often struggle with uniform distribution and controlled dispensing.

Purpose of the Study:

  • To develop a facile wettability-patterning technique for controlling liquid distribution on nonwoven substrates.
  • To optimize the design for uniform liquid distribution and dispensing from specific points.
  • To evaluate performance under various jet impingement conditions, including offset impacts.

Main Methods:

  • Utilized a wettability-patterning technique on nonwoven substrates.
  • Investigated orthogonal water jet impingement on patterned surfaces.
  • Systematically analyzed liquid distribution and dispensing at flow rates over 1 L/min.
  • Studied the impact of jet impingement location on liquid spread.

Main Results:

  • Achieved uniform liquid distribution on horizontally mounted substrates (∼50 cm²).
  • Enabled controlled dispensing from prespecified points underneath the sample.
  • Demonstrated effective performance with minimal spillage at high flow rates (>1 L/min).
  • Showed robustness to offset jet impact conditions.

Conclusions:

  • The wettability-patterning technique offers precise control over liquid-substrate interactions.
  • Optimized designs facilitate efficient liquid management in porous materials.
  • This approach has significant implications for enhancing performance in filtration and absorbent product technologies.