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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.
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  1. Home
  3. Bio-inspired Interlocking Structures For Enhancing Flexible Coatings Adhesion.
  1. Home
  3. Bio-inspired Interlocking Structures For Enhancing Flexible Coatings Adhesion.

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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

View abstract on 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.