Development of sustainable bio-based photocurable coatings on aluminum alloy surfaces

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Önen H. A., YILDIZ Z., Gurer O., Gungor A.

Journal of Coatings Technology and Research, 2025 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1007/s11998-025-01152-1
  • Dergi Adı: Journal of Coatings Technology and Research
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Applied Science & Technology Source, Chimica, Communication Abstracts, Compendex, Computer & Applied Sciences, INSPEC, Metadex, Pollution Abstracts, Civil Engineering Abstracts
  • Anahtar Kelimeler: Aluminum layer, Metal coating, Phosphorus, Photocuring, Soybean oil
  • Marmara Üniversitesi Adresli: Evet

Özet

The aim of this study is the development of photocurable phosphorus-containing coatings based on soybean oil as a promising green alternative with higher bio-content to conventional heat and VOC-based metal coatings. Considering this aim, acrylic acid (AA) and a reactive monomer containing phosphorus (Sipomer PAM-200) reacted with the epoxide groups of epoxidized soybean oil (ESBO). The synthesized AA modified ESBO (A-ESBO) and Sipomer PAM-200 modified ESBO (S-ESBO) oligomers were then chemically characterized using Fourier transform infrared and proton nuclear magnetic resonance (1H NMR) spectroscopies. Photocured free films of these oligomers were evaluated by means of hardness, mechanical, and thermal properties. Coatings were formulated by using the synthesized oligomers, photoinitiator, and reactive diluents with various functionalities, then applied on iron–silicon–aluminum (Al) alloy surfaces, and cured by UV-light. The coating quality was evaluated by contact angle, water resistance, gloss, hardness, and abrasion resistance tests. The overall findings demonstrated that adding more phosphorus-containing oligomer (S-ESBO) to the coating formulation improved the thermal stability, tensile, modulus, and hardness values. This can be attributed to a number of factors, including the presence of polar hydroxyl groups in phosphate ester, the penta polypropylene glycol groups of the phosphorus-containing oligomer, and an increase in the crosslinking density of the polymeric network.