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Related Concept Videos

Polymers02:34

Polymers

The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the properties that they exhibit. Additionally,...
Polymers02:34

Polymers

The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the properties that they exhibit. Additionally,...
Anionic Chain-Growth Polymerization: Overview01:20

Anionic Chain-Growth Polymerization: Overview

The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...

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Microfluidic Fabrication of Polymeric and Biohybrid Fibers with Predesigned Size and Shape
07:38

Microfluidic Fabrication of Polymeric and Biohybrid Fibers with Predesigned Size and Shape

Published on: January 8, 2014

Bioinspired reversible interlocker using regularly arrayed high aspect-ratio polymer fibers.

Changhyun Pang1, Tae-il Kim, Won Gyu Bae

  • 1Division of WCU Multiscale Mechanical Design, School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, Korea.

Advanced Materials (Deerfield Beach, Fla.)
|January 4, 2012
PubMed
Summary
This summary is machine-generated.

Inspired by beetle wings, a new reversible interlocker uses polymer fibers and van der Waals forces for strong, flexible adhesion. This innovative design offers high shear locking force with easy release, opening new possibilities in material science.

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Published on: August 19, 2015

Area of Science:

  • Materials Science
  • Biomimetics
  • Adhesion Science

Background:

  • Traditional interlocking mechanisms often lack flexibility or require complex actuation.
  • Biomimicry offers novel solutions by studying natural structures like beetle wing-locking devices.

Purpose of the Study:

  • To develop a novel reversible interlocker inspired by the natural mechanisms found in beetle wings.
  • To investigate the potential of van der Waals forces for creating strong yet releasable adhesive bonds.

Main Methods:

  • Design and fabrication of a two-layered interlocker utilizing high-aspect-ratio polymer fibers.
  • Exploitation of van der Waals forces for adhesion between the polymer fibers.
  • Characterization of the interlocker's flexibility, shear locking force, and lift-off properties.

Main Results:

  • The interlocker demonstrates high flexibility, crucial for conforming to various surfaces.
  • An extremely high shear locking force was achieved, indicating robust adhesion under tangential stress.
  • Easy normal lift-off was confirmed, enabling reversible and repeatable engagement and disengagement.

Conclusions:

  • The beetle-inspired interlocker effectively leverages van der Waals forces for strong, reversible adhesion.
  • The design offers a promising alternative to conventional fasteners, particularly in applications requiring flexibility and high shear strength.