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Related Concept Videos

Adherens Junctions01:24

Adherens Junctions

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Strong contact points between adjacent cells anchor them to each other, forming tissues. Such anchoring junctions are of two types –  adherens junctions and desmosomes. Adherens junctions are abundant in tissues such as  epithelium and endothelium, forming a continuous zone of adhesion called the adhesion belt. In other tissues, such as  heart muscle, they appear as clusters, linking the cells to produce coordinated heart muscle contraction.
Adherens Junctions are Dynamic
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Control of Cell Adhesion using Hydrogel Patterning Techniques for Applications in Traction Force Microscopy
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Bio-Inspired Interlocking Structures for Enhancing Flexible Coatings Adhesion.

Pengpeng Lu1, Xin Li2, Jingyang Xu1

  • 1Key Laboratory of Bio-inspired Engineering, Ministry of Education, Jilin University, Changchun, 130022, China.

Small (Weinheim an Der Bergstrasse, Germany)
|February 27, 2024
PubMed
Summary
This summary is machine-generated.

Bio-inspired interlocking microarrays significantly enhance adhesion for flexible coatings. This novel approach improves tensile strength and corrosion resistance, offering durable solutions for challenging material interfaces.

Keywords:
3D printingbio‐inspiredinterlockingmagneticmicrostructure

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Area of Science:

  • Materials Science
  • Biomimetics
  • Surface Engineering

Background:

  • Flexible protective coatings often suffer from unstable bonding in industrial settings.
  • Harsh corrosive environments degrade adhesion, limiting coating lifespan.
  • Heterogeneous material assembly requires robust interfacial adhesion.

Purpose of the Study:

  • To develop a bio-inspired method for enhancing interfacial adhesion of flexible coatings.
  • To investigate the effectiveness of interlocking microarrays in improving coating performance.
  • To provide a durable bonding solution for incompatible materials.

Main Methods:

  • Magnetic molding technique to create interlocking microarrays inspired by insect elytra.
  • Application of microarrays to polydimethylsiloxane (PDMS) and polyurethane-polyamide (PUPI) coatings.
  • Testing of adhesion strength, tensile, shear resistance, and corrosion resistance.

Main Results:

  • Interlocking PDMS coatings showed a 270% increase in tensile adhesion and 520% in shear resistance.
  • PUPI coatings with microarrays exhibited adhesion strength >10.8 MPa, unaffected by corrosion.
  • Unmodified PUPI coatings lost ~80% adhesion after 30 days of immersion.

Conclusions:

  • Bio-inspired interlocking structures provide a significant improvement in adhesion for flexible coatings.
  • The technique enhances resistance to corrosion, cavitation, and ensures long-term adhesion retention.
  • This method offers a versatile solution for bonding diverse and incompatible materials, including on curved surfaces via 3D printing.