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Robust microzip fastener: repeatable interlocking using polymeric rectangular parallelepiped arrays.

Chanseok Lee1, Sang Moon Kim, Young Joo Kim

  • 1Department of Mechanical and Aerospace Engineering, Seoul National University , Seoul 151-742, Republic of Korea.

ACS Applied Materials & Interfaces
|January 24, 2015
PubMed
Summary
This summary is machine-generated.

Researchers developed a robust microzip fastener using van der Waals forces for reliable interlocking. This new fastener demonstrates high adhesion and stability, preventing failures in practical applications.

Keywords:
dry adhesiveinterlockingline patternrobustzipperlike

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Surface Science

Background:

  • Microscale fasteners are crucial for various applications.
  • Existing microfasteners often lack robustness and repeatability.
  • Van der Waals forces offer a promising mechanism for microscale adhesion.

Purpose of the Study:

  • To design and fabricate a highly repeatable and robust microzip fastener.
  • To investigate the influence of geometric parameters and material rigidity on fastener performance.
  • To validate the fastener's performance against theoretical predictions.

Main Methods:

  • Fabrication of line arrays with varying spacing ratios and parallelepiped widths.
  • Measurement of normal and shear locking forces.
  • Analysis of adhesion forces and stability over repeated cycles.
  • Comparison of experimental results with a theoretical model based on contact area and force balance.

Main Results:

  • Achieved high adhesion forces of ~8.5 N cm⁻² (normal) and ~29.6 N cm⁻² (shear).
  • Demonstrated high stability and repeatability over 1000 cycles.
  • Experimental results showed good agreement with the proposed theoretical model.
  • Identified optimal geometric and material properties for fastener performance.

Conclusions:

  • A robust and repeatable microzip fastener based on van der Waals forces was successfully developed.
  • The fastener exhibits excellent adhesion and stability, suitable for practical applications.
  • The study provides a theoretical framework for designing similar microscale interlocking systems.