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Rapid Mix Preparation of Bioinspired Nanoscale Hydroxyapatite for Biomedical Applications
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Bioinspired nanostructured hydroxyapatite-polyelectrolyte multilayers for stone conservation.

Iosif T Hafez1, George Biskos2

  • 1Science and Technology in Archaeology and Culture Research Center, The Cyprus Institute, Nicosia 2121, Cyprus; Climate and Atmosphere Research Center, The Cyprus Institute, Nicosia 2121, Cyprus.

Journal of Colloid and Interface Science
|June 28, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel hydroxyapatite and polyelectrolyte multilayer coating for protecting stone cultural heritage. This environmentally friendly, self-healing material offers enhanced durability against weathering and pollutants.

Keywords:
Hybrid coatingsHydroxyapatitePolyelectrolyte multilayersSelf-healingStone protection

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Area of Science:

  • Materials Science
  • Conservation Science
  • Nanotechnology

Background:

  • Stone cultural heritage is vulnerable to environmental degradation from climate, acid rain, and weathering.
  • Current conservation strategies face challenges in developing effective, environmentally friendly protective coatings for diverse substrates and complex structures.

Purpose of the Study:

  • To develop and characterize a novel nanostructured, self-healing hybrid coating for stone protection.
  • To evaluate the coating's performance, including its structural, electrical, and mechanical properties, and resistance to weathering.

Main Methods:

  • Fabrication of a hydroxyapatite (HAp) nanocrystal and polyelectrolyte multilayer (PEM) coating using spray layer-by-layer functionalization on Greek marble.
  • In-situ formation of the polyelectrolyte-hydroxyapatite multilayer (PHM) structure.
  • Comprehensive characterization including structural, electrical, and mechanical analysis, and performance testing.

Main Results:

  • The PHM coating exhibited a structure similar to trabecular bone, formed rapidly.
  • The coating demonstrated chemical affinity, aesthetic compatibility, and resistance to weathering.
  • Controlled properties like adhesion and self-healing were achieved, leading to reduced surface weathering.

Conclusions:

  • The developed PHM coating is a highly effective, water-based, and environmentally friendly protective material for stone cultural heritage.
  • The spray layer-by-layer technique offers a simple and controllable method for generating protective coatings with desired properties.
  • This approach presents a promising solution for the conservation of stone monuments and similar applications.