Polyurethane graphene nanocomposites with self-healing properties by azide-alkyne click reaction

Akhan S., OKTAY B., ÖZDEMİR O. K., MADAKBAŞ S., KAYAMAN APOHAN N.

MATERIALS CHEMISTRY AND PHYSICS, cilt.254, 2020 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 254
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1016/j.matchemphys.2020.123315
  • Dergi Adı: MATERIALS CHEMISTRY AND PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Anahtar Kelimeler: Nanocomposites, Self-healing, Microcapsule, Azide-alkyne click reaction, Graphene oxide, OXIDE, COATINGS, CYCLOADDITION, MICROCAPSULES, DEGRADATION, INHIBITION, CHEMISTRY, HYDROGELS, CORROSION, ENERGY
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

Nanocomposites stand out as promising materials in many fields due to their properties such as strength, hardness, thermal stability, and lightness. Introducing self-healing ability to polymer nanocomposites provides new guidelines for strong, sustainable, and durable materials. Microcapsule-based self-healing materials work independently of an external stimulus such as pH, heat, light and solvent. In this paper, we developed autonomously self-healing UV-cured polyurethane graphene oxide nanocomposite coatings by means of efficient and useful copper-catalyzed azide-alkyne (CuAAC) click chemistry. Low molecular weight tetra-arm azide was successfully capsulated within poly(vinyl formal) capsules. Alkyne functional graphene-oxide reinforced nanocomposites containing azide microcapsules were prepared through photo-polymerization. The self-healing ability and anti-corrosion properties of the nanocomposites were studied after the damage occurred. The self-healing experiments show that the microcapsules provided a self-healing efficiency of around 70% after 24 h. Chemical, morphologic, mechanical, and thermal properties of the films were investigated. Furthermore, the electro-chemical analysis of films showed that the microcapsule containing films has a higher polarization resistance and a lower corrosion current.