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Salt-controlled self-healing nanogel composite embedded with epoxy as environmentally friendly organic coating

Abstract

Smart nanogel capsules are attracting great attention to act as self-healing materials for polymers and epoxy coating and as anticorrosion materials. The present work aimed at incorporating nanogel among silicate layers of sodium montmorillonite (Na-MMT) to increase its dispersibility into an epoxy matrix so as to be used as self-healing nanocomposites. For this purpose, N-isopropyl acrylamide (NIPAm) as a salt-sensitive monomer was selected to prepare smart nanogels to disperse the Na-MMT layers. The chemical structure, surface morphology, particle size distribution, surface charge, and degree of exfoliation of Na-MMT with NIPAm nanogel were investigated. The ability of Na-MMT/NIPAm to modify the mechanical, surface, and self-healing characteristics of epoxy matrix was studied. The corrosion inhibition and self-healing mechanism were discussed in light of salt spray resistance of epoxy nanocomposites to protect steel from corrosive environments.

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Acknowledgments

The authors extend their appreciation to the Deanship of Scientific Research at King Saud University for funding this work through research group No (RGP-235).

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Correspondence to Ayman M. Atta.

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Atta, A.M., Al-Lohedan, H.A., El-Saeed, A.M. et al. Salt-controlled self-healing nanogel composite embedded with epoxy as environmentally friendly organic coating. J Coat Technol Res 14, 1225–1236 (2017). https://doi.org/10.1007/s11998-017-9917-6

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  • DOI: https://doi.org/10.1007/s11998-017-9917-6

Keywords

  • Self-healing
  • Nanogel
  • Sodium montmorillonite
  • Epoxy coatings
  • Steel