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Related Concept Videos

Adhesion01:14

Adhesion

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Adhesion occurs when one type of molecule is attracted to a different molecule. Water exhibits adhesive properties in the presence of polar surfaces, such as glass or cellulose in plants. For instance, when water is poured into a glass, the positively charged hydrogen molecules of water are more attracted to the negatively charged oxygen molecules in the silica than to the oxygen in neighboring water molecules.
Capillary action is a result of water’s adhesive tendencies. When a narrow...
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Plants have rigid cell walls that are made up of cell wall polysaccharides that mediate cell-cell adhesion. The primary cell walls of plants consist of two independent and interacting polysaccharide networks: a pectin matrix that embeds the second network comprising cellulose and hemicelluloses.
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Immunoglobulin-like cell adhesion molecules or Ig-CAMs are a versatile group of cell surface glycoproteins belonging to the immunoglobulin protein superfamily. Ig-CAMs possess the characteristic immunoglobulin protein domains and other domains such as the fibronectin type III domain. The Ig domains are glycosylated to varying degrees in different Ig-CAMs.
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Fabrication of a Bioactive, PCL-based "Self-fitting" Shape Memory Polymer Scaffold
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Imparting conformational memory for material adhesion.

Fut Kuo Yang1, Aleksander Cholewinski1, John F Honek2

  • 1Department of Chemical Engineering, Waterloo Institute for Nanotechnology, Institute for Polymer Research, Centre for Bioengineering and Biotechnology, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada. zhaob@uwaterloo.ca.

Materials Horizons
|November 15, 2021
PubMed
Summary
This summary is machine-generated.

Researchers linked molecular conformation to material adhesion using a mussel-inspired coating. This novel approach significantly boosts interfacial adhesion across all scales, enabling stronger material bonding.

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Area of Science:

  • Materials Science
  • Biomaterials Engineering
  • Surface Chemistry

Background:

  • Adhesion is crucial for biological and synthetic systems, recognized as a 3D phenomenon.
  • Molecular conformation (3D atomic arrangement) is key in biology, particularly for biomolecule binding.
  • The link between molecular conformation and macro/microscopic adhesion remains underexplored.

Purpose of the Study:

  • To investigate the connection between molecular conformation and interfacial adhesion.
  • To develop a universal coating that utilizes molecular memory for enhanced adhesion.
  • To explore a facile method for improving material bonding.

Main Methods:

  • Manipulating the molecular conformation of a mussel-inspired universal coating.
  • Designing the coating to recognize and bind to different hydrogels.
  • Evaluating adhesion across molecular, micro, and macroscopic scales.

Main Results:

  • The mussel-inspired coating demonstrated a memory effect for recognizing hydrogels.
  • Interfacial adhesion between the coating and hydrogels increased significantly (several-fold).
  • Enhanced adhesion was observed across a broad range of length scales.

Conclusions:

  • Molecular conformation can be manipulated to enhance interfacial adhesion.
  • Imparting memory via noncovalent interactions is a general strategy for improving adhesion.
  • This approach, with energy dissipation, offers a facile method for material bonding.